Release v5.3.3

Validate Resource type in ResourceHttpRequestHandler
ResourceHandlerRegistration exposes List<Resource> locations
2026-06-08 17:33:33 +00:00 · 2021-01-12 06:26:25 +00:00 · 2021-01-11 20:54:27 +00:00 · 2021-01-11 18:40:01 +00:00 · 2021-01-11 19:07:59 +01:00 · 2021-01-11 19:04:12 +01:00
146 changed files with 4079 additions and 1390 deletions
@@ -1,4 +1,4 @@
-# <img src="src/docs/spring-framework.png" width="80" height="80"> Spring Framework [![Build Status](https://ci.spring.io/api/v1/teams/spring-framework/pipelines/spring-framework-5.3.x/jobs/build/badge)](https://ci.spring.io/teams/spring-framework/pipelines/spring-framework-5.3.x?groups=Build")
+# <img src="src/docs/spring-framework.png" width="80" height="80"> Spring Framework [![Build Status](https://ci.spring.io/api/v1/teams/spring-framework/pipelines/spring-framework-5.3.x/jobs/build/badge)](https://ci.spring.io/teams/spring-framework/pipelines/spring-framework-5.3.x?groups=Build") [![Revved up by Gradle Enterprise](https://img.shields.io/badge/Revved%20up%20by-Gradle%20Enterprise-06A0CE?logo=Gradle&labelColor=02303A)](https://ge.spring.io/scans?search.rootProjectNames=spring)

 This is the home of the Spring Framework: the foundation for all [Spring projects](https://spring.io/projects). Collectively the Spring Framework and the family of Spring projects are often referred to simply as "Spring". 

@@ -26,8 +26,8 @@ configure(allprojects) { project ->
 	dependencyManagement {
 		imports {
 			mavenBom "com.fasterxml.jackson:jackson-bom:2.12.0"
-			mavenBom "io.netty:netty-bom:4.1.54.Final"
-			mavenBom "io.projectreactor:reactor-bom:2020.0.2"
+			mavenBom "io.netty:netty-bom:4.1.56.Final"
+			mavenBom "io.projectreactor:reactor-bom:2020.0.3"
 			mavenBom "io.r2dbc:r2dbc-bom:Arabba-SR8"
 			mavenBom "io.rsocket:rsocket-bom:1.1.0"
 			mavenBom "org.eclipse.jetty:jetty-bom:9.4.35.v20201120"
@@ -63,8 +63,8 @@ configure(allprojects) { project ->

 			dependency "io.reactivex:rxjava:1.3.8"
 			dependency "io.reactivex:rxjava-reactive-streams:1.2.1"
-			dependency "io.reactivex.rxjava2:rxjava:2.2.19"
-			dependency "io.reactivex.rxjava3:rxjava:3.0.8"
+			dependency "io.reactivex.rxjava2:rxjava:2.2.20"
+			dependency "io.reactivex.rxjava3:rxjava:3.0.9"
 			dependency "io.projectreactor.tools:blockhound:1.0.4.RELEASE"

 			dependency "com.caucho:hessian:4.0.63"
@@ -95,8 +95,8 @@ configure(allprojects) { project ->
 			}

 			dependency "com.h2database:h2:1.4.200"
-			dependency "com.github.ben-manes.caffeine:caffeine:2.8.6"
-			dependency "com.github.librepdf:openpdf:1.3.23"
+			dependency "com.github.ben-manes.caffeine:caffeine:2.8.8"
+			dependency "com.github.librepdf:openpdf:1.3.24"
 			dependency "com.rometools:rome:1.15.0"
 			dependency "commons-io:commons-io:2.5"
 			dependency "io.vavr:vavr:0.10.3"
@@ -123,19 +123,19 @@ configure(allprojects) { project ->
 			dependency "net.sf.ehcache:ehcache:2.10.6"
 			dependency "org.ehcache:jcache:1.0.1"
 			dependency "org.ehcache:ehcache:3.4.0"
-			dependency "org.hibernate:hibernate-core:5.4.25.Final"
-			dependency "org.hibernate:hibernate-validator:6.1.6.Final"
+			dependency "org.hibernate:hibernate-core:5.4.27.Final"
+			dependency "org.hibernate:hibernate-validator:6.2.0.Final"
 			dependency "org.webjars:webjars-locator-core:0.46"
 			dependency "org.webjars:underscorejs:1.8.3"

-			dependencySet(group: 'org.apache.tomcat', version: '9.0.40') {
+			dependencySet(group: 'org.apache.tomcat', version: '9.0.41') {
 				entry 'tomcat-util'
 				entry('tomcat-websocket') {
 					exclude group: "org.apache.tomcat", name: "tomcat-websocket-api"
 					exclude group: "org.apache.tomcat", name: "tomcat-servlet-api"
 				}
 			}
-			dependencySet(group: 'org.apache.tomcat.embed', version: '9.0.40') {
+			dependencySet(group: 'org.apache.tomcat.embed', version: '9.0.41') {
 				entry 'tomcat-embed-core'
 				entry 'tomcat-embed-websocket'
 			}
@@ -162,7 +162,7 @@ configure(allprojects) { project ->
 			}
 			dependency 'org.apache.httpcomponents.client5:httpclient5:5.0.3'
 			dependency 'org.apache.httpcomponents.core5:httpcore5-reactive:5.0.3'
-			dependency "org.eclipse.jetty:jetty-reactive-httpclient:1.1.4"
+			dependency "org.eclipse.jetty:jetty-reactive-httpclient:1.1.5"

 			dependency "org.jruby:jruby:9.2.13.0"
 			dependency "org.python:jython-standalone:2.7.1"
@@ -191,13 +191,13 @@ configure(allprojects) { project ->
 			dependency "org.hamcrest:hamcrest:2.1"
 			dependency "org.awaitility:awaitility:3.1.6"
 			dependency "org.assertj:assertj-core:3.18.1"
-			dependencySet(group: 'org.xmlunit', version: '2.6.2') {
+			dependencySet(group: 'org.xmlunit', version: '2.8.2') {
 				entry 'xmlunit-assertj'
 				entry('xmlunit-matchers') {
 					exclude group: "org.hamcrest", name: "hamcrest-core"
 				}
 			}
-			dependencySet(group: 'org.mockito', version: '3.6.28') {
+			dependencySet(group: 'org.mockito', version: '3.7.0') {
 				entry('mockito-core') {
 					exclude group: "org.hamcrest", name: "hamcrest-core"
 				}
@@ -205,10 +205,10 @@ configure(allprojects) { project ->
 			}
 			dependency "io.mockk:mockk:1.10.2"

-			dependency("net.sourceforge.htmlunit:htmlunit:2.45.0") {
+			dependency("net.sourceforge.htmlunit:htmlunit:2.46.0") {
 				exclude group: "commons-logging", name: "commons-logging"
 			}
-			dependency("org.seleniumhq.selenium:htmlunit-driver:2.45.0") {
+			dependency("org.seleniumhq.selenium:htmlunit-driver:2.46.0") {
 				exclude group: "commons-logging", name: "commons-logging"
 			}
 			dependency("org.seleniumhq.selenium:selenium-java:3.141.59") {
@@ -236,7 +236,7 @@ configure(allprojects) { project ->

 			dependency "com.ibm.websphere:uow:6.0.2.17"
 			dependency "com.jamonapi:jamon:2.82"
-			dependency "joda-time:joda-time:2.10.6"
+			dependency "joda-time:joda-time:2.10.9"
 			dependency "org.eclipse.persistence:org.eclipse.persistence.jpa:2.7.7"
 			dependency "org.javamoney:moneta:1.3"

@@ -339,7 +339,7 @@ configure([rootProject] + javaProjects) { project ->
 	}

 	checkstyle {
-		toolVersion = "8.38"
+		toolVersion = "8.39"
 		configDirectory.set(rootProject.file("src/checkstyle"))
 	}

@@ -3,16 +3,13 @@ set -e

 case "$1" in
 	java8)
-		 echo "https://github.com/AdoptOpenJDK/openjdk8-binaries/releases/download/jdk8u265-b01/OpenJDK8U-jdk_x64_linux_hotspot_8u265b01.tar.gz"
+		 echo "https://github.com/AdoptOpenJDK/openjdk8-binaries/releases/download/jdk8u275-b01/OpenJDK8U-jdk_x64_linux_hotspot_8u275b01.tar.gz"
 	;;
 	java11)
-		 echo "https://github.com/AdoptOpenJDK/openjdk11-binaries/releases/download/jdk-11.0.8%2B10/OpenJDK11U-jdk_x64_linux_hotspot_11.0.8_10.tar.gz"
-	;;
-	java14)
-		 echo "https://github.com/AdoptOpenJDK/openjdk14-binaries/releases/download/jdk-14.0.2%2B12/OpenJDK14U-jdk_x64_linux_hotspot_14.0.2_12.tar.gz"
+		 echo "https://github.com/AdoptOpenJDK/openjdk11-binaries/releases/download/jdk-11.0.9.1%2B1/OpenJDK11U-jdk_x64_linux_hotspot_11.0.9.1_1.tar.gz"
 	;;
  java15)
-		 echo "https://github.com/AdoptOpenJDK/openjdk15-binaries/releases/download/jdk-15%2B36/OpenJDK15U-jdk_x64_linux_hotspot_15_36.tar.gz"
+		 echo "https://github.com/AdoptOpenJDK/openjdk15-binaries/releases/download/jdk-15.0.1%2B9/OpenJDK15U-jdk_x64_linux_hotspot_15.0.1_9.tar.gz"
  ;;
  *)
 		echo $"Unknown java version"
@@ -5,8 +5,11 @@ set -ex
 # UTILS
 ###########################################################

+export DEBIAN_FRONTEND=noninteractive
 apt-get update
-apt-get install --no-install-recommends -y ca-certificates net-tools libxml2-utils git curl libudev1 libxml2-utils iptables iproute2 jq fontconfig
+apt-get install --no-install-recommends -y tzdata ca-certificates net-tools libxml2-utils git curl libudev1 libxml2-utils iptables iproute2 jq fontconfig
+ln -fs /usr/share/zoneinfo/UTC /etc/localtime
+dpkg-reconfigure --frontend noninteractive tzdata
 rm -rf /var/lib/apt/lists/*

 curl https://raw.githubusercontent.com/spring-io/concourse-java-scripts/v0.0.3/concourse-java.sh > /opt/concourse-java.sh
@@ -1,4 +1,4 @@
-FROM ubuntu:bionic-20200713
+FROM ubuntu:focal-20201106

 ADD setup.sh /setup.sh
 ADD get-jdk-url.sh /get-jdk-url.sh
@@ -1,4 +1,4 @@
-FROM ubuntu:bionic-20200713
+FROM ubuntu:focal-20201106

 ADD setup.sh /setup.sh
 ADD get-jdk-url.sh /get-jdk-url.sh
@@ -1,8 +0,0 @@
-FROM ubuntu:bionic-20200713
-
-ADD setup.sh /setup.sh
-ADD get-jdk-url.sh /get-jdk-url.sh
-RUN ./setup.sh java14
-
-ENV JAVA_HOME /opt/openjdk
-ENV PATH $JAVA_HOME/bin:$PATH
@@ -1,4 +1,4 @@
-FROM ubuntu:bionic-20200713
+FROM ubuntu:focal-20201106

 ADD setup.sh /setup.sh
 ADD get-jdk-url.sh /get-jdk-url.sh
@@ -87,12 +87,6 @@ resources:
  source:
    <<: *docker-resource-source
    repository: ((docker-hub-organization))/spring-framework-jdk11-ci-image
- name: spring-framework-jdk14-ci-image
-  type: docker-image
-  icon: docker
-  source:
-    <<: *docker-resource-source
-    repository: ((docker-hub-organization))/spring-framework-jdk14-ci-image
 - name: spring-framework-jdk15-ci-image
  type: docker-image
  icon: docker
@@ -123,14 +117,6 @@ resources:
    access_token: ((github-ci-status-token))
    branch: ((branch))
    context: jdk11-build
- name: repo-status-jdk14-build
-  type: github-status-resource
-  icon: eye-check-outline
-  source:
-    repository: ((github-repo-name))
-    access_token: ((github-ci-status-token))
-    branch: ((branch))
-    context: jdk14-build
 - name: repo-status-jdk15-build
  type: github-status-resource
  icon: eye-check-outline
@@ -176,10 +162,6 @@ jobs:
      params:
        build: ci-images-git-repo/ci/images
        dockerfile: ci-images-git-repo/ci/images/spring-framework-jdk11-ci-image/Dockerfile
-    - put: spring-framework-jdk14-ci-image
-      params:
-        build: ci-images-git-repo/ci/images
-        dockerfile: ci-images-git-repo/ci/images/spring-framework-jdk14-ci-image/Dockerfile
    - put: spring-framework-jdk15-ci-image
      params:
        build: ci-images-git-repo/ci/images
@@ -268,34 +250,6 @@ jobs:
          <<: *slack-fail-params
  - put: repo-status-jdk11-build
    params: { state: "success", commit: "git-repo" }
- name: jdk14-build
-  serial: true
-  public: true
-  plan:
-    - get: spring-framework-jdk14-ci-image
-    - get: git-repo
-    - get: every-morning
-      trigger: true
-    - put: repo-status-jdk14-build
-      params: { state: "pending", commit: "git-repo" }
-    - do:
-      - task: check-project
-        privileged: true
-        timeout: ((task-timeout))
-        image: spring-framework-jdk14-ci-image
-        file: git-repo/ci/tasks/check-project.yml
-        params:
-          BRANCH: ((branch))
-          <<: *gradle-enterprise-task-params
-      on_failure:
-        do:
-          - put: repo-status-jdk14-build
-            params: { state: "failure", commit: "git-repo" }
-          - put: slack-alert
-            params:
-              <<: *slack-fail-params
-    - put: repo-status-jdk14-build
-      params: { state: "success", commit: "git-repo" }
 - name: jdk15-build
  serial: true
  public: true
@@ -480,7 +434,7 @@ jobs:

 groups:
 - name: "builds"
-  jobs: ["build", "jdk11-build", "jdk14-build", "jdk15-build"]
+  jobs: ["build", "jdk11-build", "jdk15-build"]
 - name: "releases"
  jobs: ["stage-milestone", "stage-rc", "stage-release", "promote-milestone","promote-rc", "promote-release", "sync-to-maven-central"]
 - name: "ci-images"
@@ -1,4 +1,4 @@
-version=5.3.2-SNAPSHOT
+version=5.3.3
 org.gradle.jvmargs=-Xmx1536M
 org.gradle.caching=true
 org.gradle.parallel=true
@@ -48,6 +48,7 @@ import org.springframework.cglib.proxy.Factory;
 import org.springframework.cglib.proxy.MethodInterceptor;
 import org.springframework.cglib.proxy.MethodProxy;
 import org.springframework.cglib.proxy.NoOp;
+import org.springframework.core.KotlinDetector;
 import org.springframework.core.SmartClassLoader;
 import org.springframework.lang.Nullable;
 import org.springframework.util.Assert;
@@ -752,10 +753,17 @@ class CglibAopProxy implements AopProxy, Serializable {
 				throw ex;
 			}
 			catch (Exception ex) {
-				if (ReflectionUtils.declaresException(getMethod(), ex.getClass())) {
+				if (ReflectionUtils.declaresException(getMethod(), ex.getClass()) ||
+						KotlinDetector.isKotlinType(getMethod().getDeclaringClass())) {
+					// Propagate original exception if declared on the target method
+					// (with callers expecting it). Always propagate it for Kotlin code
+					// since checked exceptions do not have to be explicitly declared there.
 					throw ex;
 				}
 				else {
+					// Checked exception thrown in the interceptor but not declared on the
+					// target method signature -> apply an UndeclaredThrowableException,
+					// aligned with standard JDK dynamic proxy behavior.
 					throw new UndeclaredThrowableException(ex);
 				}
 			}
@@ -543,6 +543,7 @@ public abstract class BeanUtils {
 		if (targetType == null || targetType.isArray() || unknownEditorTypes.contains(targetType)) {
 			return null;
 		}
+
 		ClassLoader cl = targetType.getClassLoader();
 		if (cl == null) {
 			try {
@@ -559,28 +560,34 @@ public abstract class BeanUtils {
 				return null;
 			}
 		}
+
 		String targetTypeName = targetType.getName();
 		String editorName = targetTypeName + "Editor";
 		try {
 			Class<?> editorClass = cl.loadClass(editorName);
-			if (!PropertyEditor.class.isAssignableFrom(editorClass)) {
-				if (logger.isInfoEnabled()) {
-					logger.info("Editor class [" + editorName +
-							"] does not implement [java.beans.PropertyEditor] interface");
+			if (editorClass != null) {
+				if (!PropertyEditor.class.isAssignableFrom(editorClass)) {
+					if (logger.isInfoEnabled()) {
+						logger.info("Editor class [" + editorName +
+								"] does not implement [java.beans.PropertyEditor] interface");
+					}
+					unknownEditorTypes.add(targetType);
+					return null;
 				}
-				unknownEditorTypes.add(targetType);
-				return null;
+				return (PropertyEditor) instantiateClass(editorClass);
 			}
-			return (PropertyEditor) instantiateClass(editorClass);
+			// Misbehaving ClassLoader returned null instead of ClassNotFoundException
+			// - fall back to unknown editor type registration below
 		}
 		catch (ClassNotFoundException ex) {
-			if (logger.isTraceEnabled()) {
-				logger.trace("No property editor [" + editorName + "] found for type " +
-						targetTypeName + " according to 'Editor' suffix convention");
-			}
-			unknownEditorTypes.add(targetType);
-			return null;
+			// Ignore - fall back to unknown editor type registration below
 		}
+		if (logger.isTraceEnabled()) {
+			logger.trace("No property editor [" + editorName + "] found for type " +
+					targetTypeName + " according to 'Editor' suffix convention");
+		}
+		unknownEditorTypes.add(targetType);
+		return null;
 	}

 	/**
@@ -250,7 +250,7 @@ public abstract class AbstractBeanFactory extends FactoryBeanRegistrySupport imp
 			throws BeansException {

 		String beanName = transformedBeanName(name);
-		Object bean;
+		Object beanInstance;

 		// Eagerly check singleton cache for manually registered singletons.
 		Object sharedInstance = getSingleton(beanName);
@@ -264,7 +264,7 @@ public abstract class AbstractBeanFactory extends FactoryBeanRegistrySupport imp
 					logger.trace("Returning cached instance of singleton bean '" + beanName + "'");
 				}
 			}
-			bean = getObjectForBeanInstance(sharedInstance, name, beanName, null);
+			beanInstance = getObjectForBeanInstance(sharedInstance, name, beanName, null);
 		}

 		else {
@@ -342,7 +342,7 @@ public abstract class AbstractBeanFactory extends FactoryBeanRegistrySupport imp
 							throw ex;
 						}
 					});
-					bean = getObjectForBeanInstance(sharedInstance, name, beanName, mbd);
+					beanInstance = getObjectForBeanInstance(sharedInstance, name, beanName, mbd);
 				}

 				else if (mbd.isPrototype()) {
@@ -355,7 +355,7 @@ public abstract class AbstractBeanFactory extends FactoryBeanRegistrySupport imp
 					finally {
 						afterPrototypeCreation(beanName);
 					}
-					bean = getObjectForBeanInstance(prototypeInstance, name, beanName, mbd);
+					beanInstance = getObjectForBeanInstance(prototypeInstance, name, beanName, mbd);
 				}

 				else {
@@ -377,7 +377,7 @@ public abstract class AbstractBeanFactory extends FactoryBeanRegistrySupport imp
 								afterPrototypeCreation(beanName);
 							}
 						});
-						bean = getObjectForBeanInstance(scopedInstance, name, beanName, mbd);
+						beanInstance = getObjectForBeanInstance(scopedInstance, name, beanName, mbd);
 					}
 					catch (IllegalStateException ex) {
 						throw new ScopeNotActiveException(beanName, scopeName, ex);
@@ -395,14 +395,19 @@ public abstract class AbstractBeanFactory extends FactoryBeanRegistrySupport imp
 			}
 		}

+		return adaptBeanInstance(name, beanInstance, requiredType);
+	}
+
+	@SuppressWarnings("unchecked")
+	<T> T adaptBeanInstance(String name, Object bean, @Nullable Class<?> requiredType) {
 		// Check if required type matches the type of the actual bean instance.
 		if (requiredType != null && !requiredType.isInstance(bean)) {
 			try {
-				T convertedBean = getTypeConverter().convertIfNecessary(bean, requiredType);
+				Object convertedBean = getTypeConverter().convertIfNecessary(bean, requiredType);
 				if (convertedBean == null) {
 					throw new BeanNotOfRequiredTypeException(name, requiredType, bean.getClass());
 				}
-				return convertedBean;
+				return (T) convertedBean;
 			}
 			catch (TypeMismatchException ex) {
 				if (logger.isTraceEnabled()) {
@@ -1231,8 +1231,7 @@ public class DefaultListableBeanFactory extends AbstractAutowireCapableBeanFacto
 		}

 		if (candidateNames.length == 1) {
-			String beanName = candidateNames[0];
-			return new NamedBeanHolder<>(beanName, (T) getBean(beanName, requiredType.toClass(), args));
+			return resolveNamedBean(candidateNames[0], requiredType, args);
 		}
 		else if (candidateNames.length > 1) {
 			Map<String, Object> candidates = CollectionUtils.newLinkedHashMap(candidateNames.length);
@@ -1251,8 +1250,11 @@ public class DefaultListableBeanFactory extends AbstractAutowireCapableBeanFacto
 			}
 			if (candidateName != null) {
 				Object beanInstance = candidates.get(candidateName);
-				if (beanInstance == null || beanInstance instanceof Class) {
-					beanInstance = getBean(candidateName, requiredType.toClass(), args);
+				if (beanInstance == null) {
+					return null;
+				}
+				if (beanInstance instanceof Class) {
+					return resolveNamedBean(candidateName, requiredType, args);
 				}
 				return new NamedBeanHolder<>(candidateName, (T) beanInstance);
 			}
@@ -1264,6 +1266,17 @@ public class DefaultListableBeanFactory extends AbstractAutowireCapableBeanFacto
 		return null;
 	}

+	@Nullable
+	private <T> NamedBeanHolder<T> resolveNamedBean(
+			String beanName, ResolvableType requiredType, @Nullable Object[] args) throws BeansException {
+
+		Object bean = getBean(beanName, null, args);
+		if (bean instanceof NullBean) {
+			return null;
+		}
+		return new NamedBeanHolder<T>(beanName, adaptBeanInstance(beanName, bean, requiredType.toClass()));
+	}
+
 	@Override
 	@Nullable
 	public Object resolveDependency(DependencyDescriptor descriptor, @Nullable String requestingBeanName,
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2015 the original author or authors.
+ * Copyright 2002-2021 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
@@ -16,6 +16,8 @@

 package org.springframework.context;

+import java.util.function.Consumer;
+
 import org.springframework.core.ResolvableType;
 import org.springframework.core.ResolvableTypeProvider;
 import org.springframework.util.Assert;
@@ -23,11 +25,12 @@ import org.springframework.util.Assert;
 /**
 * An {@link ApplicationEvent} that carries an arbitrary payload.
 *
- * <p>Mainly intended for internal use within the framework.
- *
 * @author Stephane Nicoll
+ * @author Juergen Hoeller
 * @since 4.2
 * @param <T> the payload type of the event
+ * @see ApplicationEventPublisher#publishEvent(Object)
+ * @see ApplicationListener#forPayload(Consumer)
 */
@SuppressWarnings("serial")
 public class PayloadApplicationEvent<T> extends ApplicationEvent implements ResolvableTypeProvider {
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2020 the original author or authors.
+ * Copyright 2002-2021 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
@@ -24,6 +24,7 @@ import org.apache.commons.logging.LogFactory;
 import org.springframework.beans.factory.BeanFactory;
 import org.springframework.context.ApplicationEvent;
 import org.springframework.context.ApplicationListener;
+import org.springframework.context.PayloadApplicationEvent;
 import org.springframework.core.ResolvableType;
 import org.springframework.lang.Nullable;
 import org.springframework.util.ErrorHandler;
@@ -55,6 +56,9 @@ public class SimpleApplicationEventMulticaster extends AbstractApplicationEventM
 	@Nullable
 	private ErrorHandler errorHandler;

+	@Nullable
+	private volatile Log lazyLogger;
+

 	/**
 	 * Create a new SimpleApplicationEventMulticaster.
@@ -173,12 +177,18 @@ public class SimpleApplicationEventMulticaster extends AbstractApplicationEventM
 		}
 		catch (ClassCastException ex) {
 			String msg = ex.getMessage();
-			if (msg == null || matchesClassCastMessage(msg, event.getClass())) {
+			if (msg == null || matchesClassCastMessage(msg, event.getClass()) ||
+					(event instanceof PayloadApplicationEvent &&
+							matchesClassCastMessage(msg, ((PayloadApplicationEvent) event).getPayload().getClass()))) {
 				// Possibly a lambda-defined listener which we could not resolve the generic event type for
-				// -> let's suppress the exception and just log a debug message.
-				Log logger = LogFactory.getLog(getClass());
-				if (logger.isTraceEnabled()) {
-					logger.trace("Non-matching event type for listener: " + listener, ex);
+				// -> let's suppress the exception.
+				Log loggerToUse = this.lazyLogger;
+				if (loggerToUse == null) {
+					loggerToUse = LogFactory.getLog(getClass());
+					this.lazyLogger = loggerToUse;
+				}
+				if (loggerToUse.isTraceEnabled()) {
+					loggerToUse.trace("Non-matching event type for listener: " + listener, ex);
 				}
 			}
 			else {
@@ -19,14 +19,13 @@ package org.springframework.scheduling.support;
 import java.time.DateTimeException;
 import java.time.temporal.Temporal;
 import java.time.temporal.ValueRange;
-import java.util.BitSet;

 import org.springframework.lang.Nullable;
 import org.springframework.util.Assert;
 import org.springframework.util.StringUtils;

 /**
- * Efficient {@link BitSet}-based extension of {@link CronField}.
+ * Efficient bitwise-operator extension of {@link CronField}.
 * Created using the {@code parse*} methods.
 *
 * @author Arjen Poutsma
@@ -130,8 +129,8 @@ final class BitsCronField extends CronField {
 					result.setBits(range);
 				}
 				else {
-					String rangeStr = value.substring(0, slashPos);
-					String deltaStr = value.substring(slashPos + 1);
+					String rangeStr = field.substring(0, slashPos);
+					String deltaStr = field.substring(slashPos + 1);
 					ValueRange range = parseRange(rangeStr, type);
 					if (rangeStr.indexOf('-') == -1) {
 						range = ValueRange.of(range.getMinimum(), type.range().getMaximum());
@@ -0,0 +1,97 @@
+/*
+ * Copyright 2002-2021 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.scheduling.support;
+
+import java.time.temporal.Temporal;
+
+import org.springframework.lang.Nullable;
+import org.springframework.util.Assert;
+
+/**
+ * Extension of {@link CronField} that wraps an array of cron fields.
+ *
+ * @author Arjen Poutsma
+ * @since 5.3.3
+ */
+final class CompositeCronField extends CronField {
+
+	private final CronField[] fields;
+
+	private final String value;
+
+
+	private CompositeCronField(Type type, CronField[] fields, String value) {
+		super(type);
+		this.fields = fields;
+		this.value = value;
+	}
+
+	/**
+	 * Composes the given fields into a {@link CronField}.
+	 */
+	public static CronField compose(CronField[] fields, Type type, String value) {
+		Assert.notEmpty(fields, "Fields must not be empty");
+		Assert.hasLength(value, "Value must not be empty");
+
+		if (fields.length == 1) {
+			return fields[0];
+		}
+		else {
+			return new CompositeCronField(type, fields, value);
+		}
+	}
+
+
+	@Nullable
+	@Override
+	public <T extends Temporal & Comparable<? super T>> T nextOrSame(T temporal) {
+		T result = null;
+		for (CronField field : this.fields) {
+			T candidate = field.nextOrSame(temporal);
+			if (result == null ||
+					candidate != null && candidate.compareTo(result) < 0) {
+				result = candidate;
+			}
+		}
+		return result;
+	}
+
+
+	@Override
+	public int hashCode() {
+		return this.value.hashCode();
+	}
+
+	@Override
+	public boolean equals(Object o) {
+		if (this == o) {
+			return true;
+		}
+		if (!(o instanceof CompositeCronField)) {
+			return false;
+		}
+		CompositeCronField other = (CompositeCronField) o;
+		return type() == other.type() &&
+				this.value.equals(other.value);
+	}
+
+	@Override
+	public String toString() {
+		return type() + " '" + this.value + "'";
+
+	}
+}
@@ -20,8 +20,10 @@ import java.time.DateTimeException;
 import java.time.temporal.ChronoField;
 import java.time.temporal.Temporal;
 import java.time.temporal.ValueRange;
+import java.util.function.BiFunction;

 import org.springframework.lang.Nullable;
+import org.springframework.util.Assert;
 import org.springframework.util.StringUtils;

 /**
@@ -77,11 +79,18 @@ abstract class CronField {
 	 * Parse the given value into a days of months {@code CronField}, the fourth entry of a cron expression.
 	 */
 	public static CronField parseDaysOfMonth(String value) {
-		if (value.contains("L") || value.contains("W")) {
-			return QuartzCronField.parseDaysOfMonth(value);
+		if (!QuartzCronField.isQuartzDaysOfMonthField(value)) {
+			return BitsCronField.parseDaysOfMonth(value);
 		}
 		else {
-			return BitsCronField.parseDaysOfMonth(value);
+			return parseList(value, Type.DAY_OF_MONTH, (field, type) -> {
+				if (QuartzCronField.isQuartzDaysOfMonthField(field)) {
+					return QuartzCronField.parseDaysOfMonth(field);
+				}
+				else {
+					return BitsCronField.parseDaysOfMonth(field);
+				}
+			});
 		}
 	}

@@ -98,15 +107,32 @@ abstract class CronField {
 	 */
 	public static CronField parseDaysOfWeek(String value) {
 		value = replaceOrdinals(value, DAYS);
-		if (value.contains("L") || value.contains("#")) {
-			return QuartzCronField.parseDaysOfWeek(value);
+		if (!QuartzCronField.isQuartzDaysOfWeekField(value)) {
+			return BitsCronField.parseDaysOfWeek(value);
 		}
 		else {
-			return BitsCronField.parseDaysOfWeek(value);
+			return parseList(value, Type.DAY_OF_WEEK, (field, type) -> {
+				if (QuartzCronField.isQuartzDaysOfWeekField(field)) {
+					return QuartzCronField.parseDaysOfWeek(field);
+				}
+				else {
+					return BitsCronField.parseDaysOfWeek(field);
+				}
+			});
 		}
 	}


+	private static CronField parseList(String value, Type type, BiFunction<String, Type, CronField> parseFieldFunction) {
+		Assert.hasLength(value, "Value must not be empty");
+		String[] fields = StringUtils.delimitedListToStringArray(value, ",");
+		CronField[] cronFields = new CronField[fields.length];
+		for (int i = 0; i < fields.length; i++) {
+			cronFields[i] = parseFieldFunction.apply(fields[i], type);
+		}
+		return CompositeCronField.compose(cronFields, type, value);
+	}
+
 	private static String replaceOrdinals(String value, String[] list) {
 		value = value.toUpperCase();
 		for (int i = 0; i < list.length; i++) {
@@ -78,6 +78,12 @@ final class QuartzCronField extends CronField {
 		this.rollForwardType = rollForwardType;
 	}

+	/**
+	 * Returns whether the given value is a Quartz day-of-month field.
+	 */
+	public static boolean isQuartzDaysOfMonthField(String value) {
+		return value.contains("L") || value.contains("W");
+	}

 	/**
 	 * Parse the given value into a days of months {@code QuartzCronField}, the fourth entry of a cron expression.
@@ -125,6 +131,13 @@ final class QuartzCronField extends CronField {
 		throw new IllegalArgumentException("No 'L' or 'W' found in '" + value + "'");
 	}

+	/**
+	 * Returns whether the given value is a Quartz day-of-week field.
+	 */
+	public static boolean isQuartzDaysOfWeekField(String value) {
+		return value.contains("L") || value.contains("#");
+	}
+
 	/**
 	 * Parse the given value into a days of week {@code QuartzCronField}, the sixth entry of a cron expression.
 	 * Expects a "L" or "#" in the given value.
@@ -271,9 +271,15 @@ class AnnotationConfigApplicationContextTests {
 		assertThat(ObjectUtils.containsElement(context.getBeanNamesForType(BeanA.class), "a")).isTrue();
 		assertThat(ObjectUtils.containsElement(context.getBeanNamesForType(BeanB.class), "b")).isTrue();
 		assertThat(ObjectUtils.containsElement(context.getBeanNamesForType(BeanC.class), "c")).isTrue();
+
 		assertThat(context.getBeansOfType(BeanA.class)).isEmpty();
 		assertThat(context.getBeansOfType(BeanB.class).values().iterator().next()).isSameAs(context.getBean(BeanB.class));
 		assertThat(context.getBeansOfType(BeanC.class).values().iterator().next()).isSameAs(context.getBean(BeanC.class));
+
+		assertThatExceptionOfType(NoSuchBeanDefinitionException.class).isThrownBy(() ->
+				context.getBeanFactory().resolveNamedBean(BeanA.class));
+		assertThat(context.getBeanFactory().resolveNamedBean(BeanB.class).getBeanInstance()).isSameAs(context.getBean(BeanB.class));
+		assertThat(context.getBeanFactory().resolveNamedBean(BeanC.class).getBeanInstance()).isSameAs(context.getBean(BeanC.class));
 	}

 	@Test
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2019 the original author or authors.
+ * Copyright 2002-2021 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
@@ -18,8 +18,10 @@ package org.springframework.context.annotation;

 import java.io.FileNotFoundException;
 import java.io.IOException;
+import java.lang.annotation.ElementType;
 import java.lang.annotation.Retention;
 import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
 import java.util.Collections;
 import java.util.Iterator;
 import java.util.Properties;
@@ -31,6 +33,7 @@ import org.junit.jupiter.api.Test;
 import org.springframework.beans.factory.BeanDefinitionStoreException;
 import org.springframework.beans.factory.FactoryBean;
 import org.springframework.beans.testfixture.beans.TestBean;
+import org.springframework.context.ConfigurableApplicationContext;
 import org.springframework.core.annotation.AliasFor;
 import org.springframework.core.env.Environment;
 import org.springframework.core.env.MapPropertySource;
@@ -47,13 +50,13 @@ import static org.assertj.core.api.Assertions.assertThatExceptionOfType;
 *
 * @author Chris Beams
 * @author Phillip Webb
+ * @author Sam Brannen
 * @since 3.1
 */
-public class PropertySourceAnnotationTests {
-
+class PropertySourceAnnotationTests {

 	@Test
-	public void withExplicitName() {
+	void withExplicitName() {
 		AnnotationConfigApplicationContext ctx = new AnnotationConfigApplicationContext();
 		ctx.register(ConfigWithExplicitName.class);
 		ctx.refresh();
@@ -73,29 +76,25 @@ public class PropertySourceAnnotationTests {
 	}

 	@Test
-	public void withImplicitName() {
-		AnnotationConfigApplicationContext ctx = new AnnotationConfigApplicationContext();
-		ctx.register(ConfigWithImplicitName.class);
-		ctx.refresh();
+	void withImplicitName() {
+		AnnotationConfigApplicationContext ctx = new AnnotationConfigApplicationContext(ConfigWithImplicitName.class);
 		assertThat(ctx.getEnvironment().getPropertySources().contains("class path resource [org/springframework/context/annotation/p1.properties]")).as("property source p1 was not added").isTrue();
 		assertThat(ctx.getBean(TestBean.class).getName()).isEqualTo("p1TestBean");
 	}

 	@Test
-	public void withTestProfileBeans() {
-		AnnotationConfigApplicationContext ctx = new AnnotationConfigApplicationContext();
-		ctx.register(ConfigWithTestProfileBeans.class);
-		ctx.refresh();
+	void withTestProfileBeans() {
+		AnnotationConfigApplicationContext ctx = new AnnotationConfigApplicationContext(ConfigWithTestProfileBeans.class);
 		assertThat(ctx.containsBean("testBean")).isTrue();
 		assertThat(ctx.containsBean("testProfileBean")).isTrue();
 	}

 	/**
-	 * Tests the LIFO behavior of @PropertySource annotaitons.
-	 * The last one registered should 'win'.
+	 * Tests the LIFO behavior of @PropertySource annotations.
+	 * <p>The last one registered should 'win'.
 	 */
 	@Test
-	public void orderingIsLifo() {
+	void orderingIsLifo() {
 		{
 			AnnotationConfigApplicationContext ctx = new AnnotationConfigApplicationContext();
 			ctx.register(ConfigWithImplicitName.class, P2Config.class);
@@ -114,7 +113,7 @@ public class PropertySourceAnnotationTests {
 	}

 	@Test
-	public void withCustomFactory() {
+	void withCustomFactory() {
 		AnnotationConfigApplicationContext ctx = new AnnotationConfigApplicationContext();
 		ctx.register(ConfigWithImplicitName.class, WithCustomFactory.class);
 		ctx.refresh();
@@ -122,7 +121,7 @@ public class PropertySourceAnnotationTests {
 	}

 	@Test
-	public void withCustomFactoryAsMeta() {
+	void withCustomFactoryAsMeta() {
 		AnnotationConfigApplicationContext ctx = new AnnotationConfigApplicationContext();
 		ctx.register(ConfigWithImplicitName.class, WithCustomFactoryAsMeta.class);
 		ctx.refresh();
@@ -130,59 +129,43 @@ public class PropertySourceAnnotationTests {
 	}

 	@Test
-	public void withUnresolvablePlaceholder() {
-		AnnotationConfigApplicationContext ctx = new AnnotationConfigApplicationContext();
-		ctx.register(ConfigWithUnresolvablePlaceholder.class);
-		try {
-			ctx.refresh();
-		}
-		catch (BeanDefinitionStoreException ex) {
-			assertThat(ex.getCause() instanceof IllegalArgumentException).isTrue();
-		}
+	void withUnresolvablePlaceholder() {
+		assertThatExceptionOfType(BeanDefinitionStoreException.class)
+			.isThrownBy(() -> new AnnotationConfigApplicationContext(ConfigWithUnresolvablePlaceholder.class))
+			.withCauseInstanceOf(IllegalArgumentException.class);
 	}

 	@Test
-	public void withUnresolvablePlaceholderAndDefault() {
-		AnnotationConfigApplicationContext ctx = new AnnotationConfigApplicationContext();
-		ctx.register(ConfigWithUnresolvablePlaceholderAndDefault.class);
-		ctx.refresh();
+	void withUnresolvablePlaceholderAndDefault() {
+		AnnotationConfigApplicationContext ctx = new AnnotationConfigApplicationContext(ConfigWithUnresolvablePlaceholderAndDefault.class);
 		assertThat(ctx.getBean(TestBean.class).getName()).isEqualTo("p1TestBean");
 	}

 	@Test
-	public void withResolvablePlaceholder() {
-		AnnotationConfigApplicationContext ctx = new AnnotationConfigApplicationContext();
-		ctx.register(ConfigWithResolvablePlaceholder.class);
+	void withResolvablePlaceholder() {
 		System.setProperty("path.to.properties", "org/springframework/context/annotation");
-		ctx.refresh();
+		AnnotationConfigApplicationContext ctx = new AnnotationConfigApplicationContext(ConfigWithResolvablePlaceholder.class);
 		assertThat(ctx.getBean(TestBean.class).getName()).isEqualTo("p1TestBean");
 		System.clearProperty("path.to.properties");
 	}

 	@Test
-	public void withResolvablePlaceholderAndFactoryBean() {
-		AnnotationConfigApplicationContext ctx = new AnnotationConfigApplicationContext();
-		ctx.register(ConfigWithResolvablePlaceholderAndFactoryBean.class);
+	void withResolvablePlaceholderAndFactoryBean() {
 		System.setProperty("path.to.properties", "org/springframework/context/annotation");
-		ctx.refresh();
+		AnnotationConfigApplicationContext ctx = new AnnotationConfigApplicationContext(ConfigWithResolvablePlaceholderAndFactoryBean.class);
 		assertThat(ctx.getBean(TestBean.class).getName()).isEqualTo("p1TestBean");
 		System.clearProperty("path.to.properties");
 	}

 	@Test
-	public void withEmptyResourceLocations() {
-		AnnotationConfigApplicationContext ctx = new AnnotationConfigApplicationContext();
-		ctx.register(ConfigWithEmptyResourceLocations.class);
-		try {
-			ctx.refresh();
-		}
-		catch (BeanDefinitionStoreException ex) {
-			assertThat(ex.getCause() instanceof IllegalArgumentException).isTrue();
-		}
+	void withEmptyResourceLocations() {
+		assertThatExceptionOfType(BeanDefinitionStoreException.class)
+			.isThrownBy(() -> new AnnotationConfigApplicationContext(ConfigWithEmptyResourceLocations.class))
+			.withCauseInstanceOf(IllegalArgumentException.class);
 	}

 	@Test
-	public void withNameAndMultipleResourceLocations() {
+	void withNameAndMultipleResourceLocations() {
 		AnnotationConfigApplicationContext ctx = new AnnotationConfigApplicationContext(ConfigWithNameAndMultipleResourceLocations.class);
 		assertThat(ctx.getEnvironment().containsProperty("from.p1")).isTrue();
 		assertThat(ctx.getEnvironment().containsProperty("from.p2")).isTrue();
@@ -191,7 +174,7 @@ public class PropertySourceAnnotationTests {
 	}

 	@Test
-	public void withMultipleResourceLocations() {
+	void withMultipleResourceLocations() {
 		AnnotationConfigApplicationContext ctx = new AnnotationConfigApplicationContext(ConfigWithMultipleResourceLocations.class);
 		assertThat(ctx.getEnvironment().containsProperty("from.p1")).isTrue();
 		assertThat(ctx.getEnvironment().containsProperty("from.p2")).isTrue();
@@ -200,7 +183,7 @@ public class PropertySourceAnnotationTests {
 	}

 	@Test
-	public void withPropertySources() {
+	void withRepeatedPropertySourcesInContainerAnnotation() {
 		AnnotationConfigApplicationContext ctx = new AnnotationConfigApplicationContext(ConfigWithPropertySources.class);
 		assertThat(ctx.getEnvironment().containsProperty("from.p1")).isTrue();
 		assertThat(ctx.getEnvironment().containsProperty("from.p2")).isTrue();
@@ -209,7 +192,43 @@ public class PropertySourceAnnotationTests {
 	}

 	@Test
-	public void withNamedPropertySources() {
+	void withRepeatedPropertySources() {
+		try (AnnotationConfigApplicationContext ctx = new AnnotationConfigApplicationContext(ConfigWithRepeatedPropertySourceAnnotations.class)) {
+			assertThat(ctx.getEnvironment().containsProperty("from.p1")).isTrue();
+			assertThat(ctx.getEnvironment().containsProperty("from.p2")).isTrue();
+			// p2 should 'win' as it was registered last
+			assertThat(ctx.getEnvironment().getProperty("testbean.name")).isEqualTo("p2TestBean");
+		}
+	}
+
+	@Test
+	void withRepeatedPropertySourcesOnComposedAnnotation() {
+		Class<?> configClass = ConfigWithRepeatedPropertySourceAnnotationsOnComposedAnnotation.class;
+		String key = "custom.config.package";
+
+		System.clearProperty(key);
+		try (ConfigurableApplicationContext ctx = new AnnotationConfigApplicationContext(configClass)) {
+			assertThat(ctx.getEnvironment().containsProperty("from.p1")).isTrue();
+			assertThat(ctx.getEnvironment().containsProperty("from.p2")).isTrue();
+			// p2 should 'win' as it was registered last
+			assertThat(ctx.getEnvironment().getProperty("testbean.name")).isEqualTo("p2TestBean");
+		}
+
+		System.setProperty(key, "org/springframework/context/annotation");
+		try (ConfigurableApplicationContext ctx = new AnnotationConfigApplicationContext(configClass)) {
+			assertThat(ctx.getEnvironment().containsProperty("from.p1")).isTrue();
+			assertThat(ctx.getEnvironment().containsProperty("from.p2")).isTrue();
+			assertThat(ctx.getEnvironment().containsProperty("from.p3")).isTrue();
+			// p3 should 'win' as it was registered last
+			assertThat(ctx.getEnvironment().getProperty("testbean.name")).isEqualTo("p3TestBean");
+		}
+		finally {
+			System.clearProperty(key);
+		}
+	}
+
+	@Test
+	void withNamedPropertySources() {
 		AnnotationConfigApplicationContext ctx = new AnnotationConfigApplicationContext(ConfigWithNamedPropertySources.class);
 		assertThat(ctx.getEnvironment().containsProperty("from.p1")).isTrue();
 		assertThat(ctx.getEnvironment().containsProperty("from.p2")).isTrue();
@@ -218,21 +237,21 @@ public class PropertySourceAnnotationTests {
 	}

 	@Test
-	public void withMissingPropertySource() {
-		assertThatExceptionOfType(BeanDefinitionStoreException.class).isThrownBy(() ->
-				new AnnotationConfigApplicationContext(ConfigWithMissingPropertySource.class))
+	void withMissingPropertySource() {
+		assertThatExceptionOfType(BeanDefinitionStoreException.class)
+			.isThrownBy(() -> new AnnotationConfigApplicationContext(ConfigWithMissingPropertySource.class))
 			.withCauseInstanceOf(FileNotFoundException.class);
 	}

 	@Test
-	public void withIgnoredPropertySource() {
+	void withIgnoredPropertySource() {
 		AnnotationConfigApplicationContext ctx = new AnnotationConfigApplicationContext(ConfigWithIgnoredPropertySource.class);
 		assertThat(ctx.getEnvironment().containsProperty("from.p1")).isTrue();
 		assertThat(ctx.getEnvironment().containsProperty("from.p2")).isTrue();
 	}

 	@Test
-	public void withSameSourceImportedInDifferentOrder() {
+	void withSameSourceImportedInDifferentOrder() {
 		AnnotationConfigApplicationContext ctx = new AnnotationConfigApplicationContext(ConfigWithSameSourceImportedInDifferentOrder.class);
 		assertThat(ctx.getEnvironment().containsProperty("from.p1")).isTrue();
 		assertThat(ctx.getEnvironment().containsProperty("from.p2")).isTrue();
@@ -240,7 +259,7 @@ public class PropertySourceAnnotationTests {
 	}

 	@Test
-	public void orderingWithAndWithoutNameAndMultipleResourceLocations() {
+	void orderingWithAndWithoutNameAndMultipleResourceLocations() {
 		// SPR-10820: p2 should 'win' as it was registered last
 		AnnotationConfigApplicationContext ctxWithName = new AnnotationConfigApplicationContext(ConfigWithNameAndMultipleResourceLocations.class);
 		AnnotationConfigApplicationContext ctxWithoutName = new AnnotationConfigApplicationContext(ConfigWithMultipleResourceLocations.class);
@@ -249,14 +268,14 @@ public class PropertySourceAnnotationTests {
 	}

 	@Test
-	public void orderingWithAndWithoutNameAndFourResourceLocations() {
+	void orderingWithAndWithoutNameAndFourResourceLocations() {
 		// SPR-12198: p4 should 'win' as it was registered last
 		AnnotationConfigApplicationContext ctxWithoutName = new AnnotationConfigApplicationContext(ConfigWithFourResourceLocations.class);
 		assertThat(ctxWithoutName.getEnvironment().getProperty("testbean.name")).isEqualTo("p4TestBean");
 	}

 	@Test
-	public void orderingDoesntReplaceExisting() throws Exception {
+	void orderingDoesntReplaceExisting() throws Exception {
 		// SPR-12198: mySource should 'win' as it was registered manually
 		AnnotationConfigApplicationContext ctxWithoutName = new AnnotationConfigApplicationContext();
 		MapPropertySource mySource = new MapPropertySource("mine", Collections.singletonMap("testbean.name", "myTestBean"));
@@ -267,51 +286,51 @@ public class PropertySourceAnnotationTests {

 	}

+
 	@Configuration
-	@PropertySource(value="classpath:${unresolvable}/p1.properties")
+	@PropertySource("classpath:${unresolvable}/p1.properties")
 	static class ConfigWithUnresolvablePlaceholder {
 	}


 	@Configuration
-	@PropertySource(value="classpath:${unresolvable:org/springframework/context/annotation}/p1.properties")
+	@PropertySource("classpath:${unresolvable:org/springframework/context/annotation}/p1.properties")
 	static class ConfigWithUnresolvablePlaceholderAndDefault {

 		@Inject Environment env;

 		@Bean
-		public TestBean testBean() {
+		TestBean testBean() {
 			return new TestBean(env.getProperty("testbean.name"));
 		}
 	}


 	@Configuration
-	@PropertySource(value="classpath:${path.to.properties}/p1.properties")
+	@PropertySource("classpath:${path.to.properties}/p1.properties")
 	static class ConfigWithResolvablePlaceholder {

 		@Inject Environment env;

 		@Bean
-		public TestBean testBean() {
+		TestBean testBean() {
 			return new TestBean(env.getProperty("testbean.name"));
 		}
 	}


 	@Configuration
-	@PropertySource(value="classpath:${path.to.properties}/p1.properties")
+	@PropertySource("classpath:${path.to.properties}/p1.properties")
 	static class ConfigWithResolvablePlaceholderAndFactoryBean {

 		@Inject Environment env;

-		@SuppressWarnings("rawtypes")
 		@Bean
-		public FactoryBean testBean() {
+		FactoryBean<TestBean> testBean() {
 			final String name = env.getProperty("testbean.name");
-			return new FactoryBean() {
+			return new FactoryBean<TestBean>() {
 				@Override
-				public Object getObject() {
+				public TestBean getObject() {
 					return new TestBean(name);
 				}
 				@Override
@@ -334,7 +353,7 @@ public class PropertySourceAnnotationTests {
 		@Inject Environment env;

 		@Bean
-		public TestBean testBean() {
+		TestBean testBean() {
 			return new TestBean(env.getProperty("testbean.name"));
 		}
 	}
@@ -347,7 +366,7 @@ public class PropertySourceAnnotationTests {
 		@Inject Environment env;

 		@Bean
-		public TestBean testBean() {
+		TestBean testBean() {
 			return new TestBean(env.getProperty("testbean.name"));
 		}
 	}
@@ -361,7 +380,7 @@ public class PropertySourceAnnotationTests {
 		@Inject Environment env;

 		@Bean @Profile("test")
-		public TestBean testBean() {
+		TestBean testBean() {
 			return new TestBean(env.getProperty("testbean.name"));
 		}
 	}
@@ -380,21 +399,21 @@ public class PropertySourceAnnotationTests {


 	@Configuration
-	@MyPropertySource(value = "classpath:org/springframework/context/annotation/p2.properties")
+	@MyPropertySource("classpath:org/springframework/context/annotation/p2.properties")
 	static class WithCustomFactoryAsMeta {
 	}


 	@Retention(RetentionPolicy.RUNTIME)
 	@PropertySource(value = {}, factory = MyCustomFactory.class)
-	public @interface MyPropertySource {
+	@interface MyPropertySource {

 		@AliasFor(annotation = PropertySource.class)
 		String value();
 	}


-	public static class MyCustomFactory implements PropertySourceFactory {
+	static class MyCustomFactory implements PropertySourceFactory {

 		@Override
 		public org.springframework.core.env.PropertySource<?> createPropertySource(String name, EncodedResource resource) throws IOException {
@@ -422,11 +441,10 @@ public class PropertySourceAnnotationTests {


 	@Configuration
-	@PropertySource(
-			value = {
-					"classpath:org/springframework/context/annotation/p1.properties",
-					"classpath:org/springframework/context/annotation/p2.properties"
-			})
+	@PropertySource({
+		"classpath:org/springframework/context/annotation/p1.properties",
+		"classpath:org/springframework/context/annotation/p2.properties"
+	})
 	static class ConfigWithMultipleResourceLocations {
 	}

@@ -434,12 +452,33 @@ public class PropertySourceAnnotationTests {
 	@Configuration
 	@PropertySources({
 		@PropertySource("classpath:org/springframework/context/annotation/p1.properties"),
-		@PropertySource("classpath:${base.package}/p2.properties"),
+		@PropertySource("classpath:${base.package}/p2.properties")
 	})
 	static class ConfigWithPropertySources {
 	}


+	@Configuration
+	@PropertySource("classpath:org/springframework/context/annotation/p1.properties")
+	@PropertySource(value = "classpath:${base.package}/p2.properties", ignoreResourceNotFound = true)
+	static class ConfigWithRepeatedPropertySourceAnnotations {
+	}
+
+
+	@Target(ElementType.TYPE)
+	@Retention(RetentionPolicy.RUNTIME)
+	@Configuration
+	@PropertySource("classpath:org/springframework/context/annotation/p1.properties")
+	@PropertySource(value = "classpath:${base.package}/p2.properties", ignoreResourceNotFound = true)
+	@PropertySource(value = "classpath:${custom.config.package:bogus/config}/p3.properties", ignoreResourceNotFound = true)
+	@interface ComposedConfiguration {
+	}
+
+	@ComposedConfiguration
+	static class ConfigWithRepeatedPropertySourceAnnotationsOnComposedAnnotation {
+	}
+
+
 	@Configuration
 	@PropertySources({
 		@PropertySource(name = "psName", value = "classpath:org/springframework/context/annotation/p1.properties"),
@@ -471,7 +510,7 @@ public class PropertySourceAnnotationTests {


 	@Configuration
-	@PropertySource(value = {})
+	@PropertySource({})
 	static class ConfigWithEmptyResourceLocations {
 	}

@@ -482,7 +521,7 @@ public class PropertySourceAnnotationTests {
 		@PropertySource("classpath:org/springframework/context/annotation/p2.properties")
 	})
 	@Configuration
-	public static class ConfigWithSameSourceImportedInDifferentOrder {
+	static class ConfigWithSameSourceImportedInDifferentOrder {

 	}

@@ -492,18 +531,17 @@ public class PropertySourceAnnotationTests {
 		@PropertySource("classpath:org/springframework/context/annotation/p2.properties"),
 		@PropertySource("classpath:org/springframework/context/annotation/p1.properties")
 	})
-	public static class ConfigImportedWithSameSourceImportedInDifferentOrder {
+	static class ConfigImportedWithSameSourceImportedInDifferentOrder {
 	}


 	@Configuration
-	@PropertySource(
-			value = {
-					"classpath:org/springframework/context/annotation/p1.properties",
-					"classpath:org/springframework/context/annotation/p2.properties",
-					"classpath:org/springframework/context/annotation/p3.properties",
-					"classpath:org/springframework/context/annotation/p4.properties"
-			})
+	@PropertySource({
+		"classpath:org/springframework/context/annotation/p1.properties",
+		"classpath:org/springframework/context/annotation/p2.properties",
+		"classpath:org/springframework/context/annotation/p3.properties",
+		"classpath:org/springframework/context/annotation/p4.properties"
+	})
 	static class ConfigWithFourResourceLocations {
 	}

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2020 the original author or authors.
+ * Copyright 2002-2021 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
@@ -49,9 +49,11 @@ public class PayloadApplicationEventTests {
 	public void testProgrammaticEventListener() {
 		List<Auditable> events = new ArrayList<>();
 		ApplicationListener<AuditablePayloadEvent<String>> listener = events::add;
+		ApplicationListener<AuditablePayloadEvent<Integer>> mismatch = (event -> event.getPayload().intValue());

 		ConfigurableApplicationContext ac = new GenericApplicationContext();
 		ac.addApplicationListener(listener);
+		ac.addApplicationListener(mismatch);
 		ac.refresh();

 		AuditablePayloadEvent<String> event = new AuditablePayloadEvent<>(this, "xyz");
@@ -63,9 +65,11 @@ public class PayloadApplicationEventTests {
 	public void testProgrammaticPayloadListener() {
 		List<String> events = new ArrayList<>();
 		ApplicationListener<PayloadApplicationEvent<String>> listener = ApplicationListener.forPayload(events::add);
+		ApplicationListener<PayloadApplicationEvent<Integer>> mismatch = ApplicationListener.forPayload(payload -> payload.intValue());

 		ConfigurableApplicationContext ac = new GenericApplicationContext();
 		ac.addApplicationListener(listener);
+		ac.addApplicationListener(mismatch);
 		ac.refresh();

 		AuditablePayloadEvent<String> event = new AuditablePayloadEvent<>(this, "xyz");
@@ -25,18 +25,47 @@ import static org.assertj.core.api.Assertions.assertThat;
 import static org.assertj.core.api.Assertions.assertThatIllegalArgumentException;

 /**
+ * Unit tests for {@link BitsCronField}.
+ *
 * @author Arjen Poutsma
+ * @author Sam Brannen
 */
-public class BitsCronFieldTests {
+class BitsCronFieldTests {

 	@Test
 	void parse() {
 		assertThat(BitsCronField.parseSeconds("42")).has(clearRange(0, 41)).has(set(42)).has(clearRange(43, 59));
-		assertThat(BitsCronField.parseMinutes("1,2,5,9")).has(clear(0)).has(set(1, 2)).has(clearRange(3,4)).has(set(5)).has(clearRange(6,8)).has(set(9)).has(clearRange(10,59));
 		assertThat(BitsCronField.parseSeconds("0-4,8-12")).has(setRange(0, 4)).has(clearRange(5,7)).has(setRange(8, 12)).has(clearRange(13,59));
-		assertThat(BitsCronField.parseHours("0-23/2")).has(set(0, 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22)).has(clear(1,3,5,7,9,11,13,15,17,19,21,23));
-		assertThat(BitsCronField.parseDaysOfWeek("0")).has(clearRange(0, 6)).has(set(7, 7));
 		assertThat(BitsCronField.parseSeconds("57/2")).has(clearRange(0, 56)).has(set(57)).has(clear(58)).has(set(59));
+
+		assertThat(BitsCronField.parseMinutes("30")).has(set(30)).has(clearRange(1, 29)).has(clearRange(31, 59));
+
+		assertThat(BitsCronField.parseHours("23")).has(set(23)).has(clearRange(0, 23));
+		assertThat(BitsCronField.parseHours("0-23/2")).has(set(0, 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22)).has(clear(1,3,5,7,9,11,13,15,17,19,21,23));
+
+		assertThat(BitsCronField.parseDaysOfMonth("1")).has(set(1)).has(clearRange(2, 31));
+
+		assertThat(BitsCronField.parseMonth("1")).has(set(1)).has(clearRange(2, 12));
+
+		assertThat(BitsCronField.parseDaysOfWeek("0")).has(set(7, 7)).has(clearRange(0, 6));
+	}
+
+	@Test
+	void parseLists() {
+		assertThat(BitsCronField.parseSeconds("15,30")).has(set(15, 30)).has(clearRange(1, 15)).has(clearRange(31, 59));
+		assertThat(BitsCronField.parseMinutes("1,2,5,9")).has(set(1, 2, 5, 9)).has(clear(0)).has(clearRange(3, 4)).has(clearRange(6, 8)).has(clearRange(10, 59));
+		assertThat(BitsCronField.parseHours("1,2,3")).has(set(1, 2, 3)).has(clearRange(4, 23));
+		assertThat(BitsCronField.parseDaysOfMonth("1,2,3")).has(set(1, 2, 3)).has(clearRange(4, 31));
+		assertThat(BitsCronField.parseMonth("1,2,3")).has(set(1, 2, 3)).has(clearRange(4, 12));
+		assertThat(BitsCronField.parseDaysOfWeek("1,2,3")).has(set(1, 2, 3)).has(clearRange(4, 7));
+
+		assertThat(BitsCronField.parseMinutes("5,10-30/2"))
+				.has(clearRange(0, 5))
+				.has(set(5))
+				.has(clearRange(6,10))
+				.has(set(10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30))
+				.has(clear(11, 13, 15, 17, 19, 21, 23, 25, 27, 29))
+				.has(clearRange(31, 60));
 	}

 	@Test
@@ -31,6 +31,7 @@ import org.junit.jupiter.api.Test;
 import static java.time.DayOfWeek.FRIDAY;
 import static java.time.DayOfWeek.MONDAY;
 import static java.time.DayOfWeek.SUNDAY;
+import static java.time.DayOfWeek.THURSDAY;
 import static java.time.DayOfWeek.TUESDAY;
 import static java.time.DayOfWeek.WEDNESDAY;
 import static java.time.temporal.TemporalAdjusters.next;
@@ -116,6 +117,7 @@ class CronExpressionTests {
 		LocalDateTime last = LocalDateTime.now().withMinute(10);
 		LocalDateTime expected = last.plusMinutes(1).withSecond(0).withNano(0);
 		LocalDateTime actual = expression.next(last);
+		assertThat(actual).isNotNull();
 		assertThat(actual).isEqualTo(expected);

 		last = actual;
@@ -149,6 +151,7 @@ class CronExpressionTests {
 		LocalDateTime last = LocalDateTime.of(year, 10, 30, 11, 1);
 		LocalDateTime expected = last.withHour(12).withMinute(0);
 		LocalDateTime actual = expression.next(last);
+		assertThat(actual).isNotNull();
 		assertThat(actual).isEqualTo(expected);

 		last = actual;
@@ -173,6 +176,7 @@ class CronExpressionTests {
 		LocalDateTime last = LocalDateTime.now().withDayOfMonth(1);
 		LocalDateTime expected = last.plusDays(1).withHour(0).withMinute(0).withSecond(0).withNano(0);
 		LocalDateTime actual = expression.next(last);
+		assertThat(actual).isNotNull();
 		assertThat(actual).isEqualTo(expected);

 		last = actual;
@@ -207,6 +211,7 @@ class CronExpressionTests {
 		LocalDateTime last = LocalDateTime.now().withMonth(9).withDayOfMonth(30);
 		LocalDateTime expected = LocalDateTime.of(last.getYear(), 10, 1, 0, 0);
 		LocalDateTime actual = expression.next(last);
+		assertThat(actual).isNotNull();
 		assertThat(actual).isEqualTo(expected);

 		last = actual;
@@ -222,6 +227,7 @@ class CronExpressionTests {
 		LocalDateTime last = LocalDateTime.now().withMonth(8).withDayOfMonth(30);
 		LocalDateTime expected = last.plusDays(1).withHour(0).withMinute(0).withSecond(0).withNano(0);
 		LocalDateTime actual = expression.next(last);
+		assertThat(actual).isNotNull();
 		assertThat(actual).isEqualTo(expected);

 		last = actual;
@@ -237,6 +243,7 @@ class CronExpressionTests {
 		ZonedDateTime last = ZonedDateTime.now(ZoneId.of("CET")).withMonth(10).withDayOfMonth(30);
 		ZonedDateTime expected = last.withDayOfMonth(31).withHour(0).withMinute(0).withSecond(0).withNano(0);
 		ZonedDateTime actual = expression.next(last);
+		assertThat(actual).isNotNull();
 		assertThat(actual).isEqualTo(expected);

 		last = actual;
@@ -251,6 +258,7 @@ class CronExpressionTests {
 		LocalDateTime last = LocalDateTime.now().withMonth(10).withDayOfMonth(30);
 		LocalDateTime expected = LocalDateTime.of(last.getYear(), 11, 1, 0, 0);
 		LocalDateTime actual = expression.next(last);
+		assertThat(actual).isNotNull();
 		assertThat(actual).isEqualTo(expected);

 		last = actual;
@@ -265,6 +273,7 @@ class CronExpressionTests {
 		LocalDateTime last = LocalDateTime.now().withYear(2010).withMonth(12).withDayOfMonth(31);
 		LocalDateTime expected = LocalDateTime.of(2011, 1, 1, 0, 0);
 		LocalDateTime actual = expression.next(last);
+		assertThat(actual).isNotNull();
 		assertThat(actual).isEqualTo(expected);

 		last = actual;
@@ -297,6 +306,7 @@ class CronExpressionTests {
 		LocalDateTime last = LocalDateTime.now().with(next(MONDAY));
 		LocalDateTime expected = last.plusDays(1).withHour(0).withMinute(0).withSecond(0).withNano(0);
 		LocalDateTime actual = expression.next(last);
+		assertThat(actual).isNotNull();
 		assertThat(actual).isEqualTo(expected);
 		assertThat(actual.getDayOfWeek()).isEqualTo(TUESDAY);
 	}
@@ -308,6 +318,7 @@ class CronExpressionTests {
 		LocalDateTime last = LocalDateTime.now().with(next(WEDNESDAY));
 		LocalDateTime expected = last.plusDays(6).withHour(0).withMinute(0).withSecond(0).withNano(0);
 		LocalDateTime actual = expression.next(last);
+		assertThat(actual).isNotNull();
 		assertThat(actual).isEqualTo(expected);
 		assertThat(actual.getDayOfWeek()).isEqualTo(TUESDAY);
 	}
@@ -319,6 +330,7 @@ class CronExpressionTests {
 		LocalDateTime last = LocalDateTime.now().withMinute(4).withSecond(54);
 		LocalDateTime expected = last.plusMinutes(1).withSecond(55).withNano(0);
 		LocalDateTime actual = expression.next(last);
+		assertThat(actual).isNotNull();
 		assertThat(actual).isEqualTo(expected);

 		last = actual;
@@ -333,6 +345,7 @@ class CronExpressionTests {
 		LocalDateTime last = LocalDateTime.now().withHour(9).withSecond(54);
 		LocalDateTime expected = last.plusHours(1).withMinute(0).withSecond(55).withNano(0);
 		LocalDateTime actual = expression.next(last);
+		assertThat(actual).isNotNull();
 		assertThat(actual).isEqualTo(expected);

 		last = actual;
@@ -347,6 +360,7 @@ class CronExpressionTests {
 		LocalDateTime last = LocalDateTime.now().withHour(9).withMinute(4);
 		LocalDateTime expected = last.plusHours(1).plusMinutes(1).withSecond(0).withNano(0);
 		LocalDateTime actual = expression.next(last);
+		assertThat(actual).isNotNull();
 		assertThat(actual).isEqualTo(expected);

 		last = actual;
@@ -362,6 +376,7 @@ class CronExpressionTests {
 		LocalDateTime last = LocalDateTime.now().withDayOfMonth(2).withSecond(54);
 		LocalDateTime expected = last.plusDays(1).withHour(0).withMinute(0).withSecond(55).withNano(0);
 		LocalDateTime actual = expression.next(last);
+		assertThat(actual).isNotNull();
 		assertThat(actual).isEqualTo(expected);

 		last = actual;
@@ -376,6 +391,7 @@ class CronExpressionTests {
 		LocalDateTime last = LocalDateTime.now().withMonth(10).withDayOfMonth(2);
 		LocalDateTime expected = LocalDateTime.of(last.getYear(), 11, 3, 0, 0);
 		LocalDateTime actual = expression.next(last);
+		assertThat(actual).isNotNull();
 		assertThat(actual).isEqualTo(expected);

 		last = actual;
@@ -398,6 +414,7 @@ class CronExpressionTests {
 		LocalDateTime last = LocalDateTime.now().withYear(2007).withMonth(2).withDayOfMonth(10);
 		LocalDateTime expected = LocalDateTime.of(2008, 2, 29, 0, 0);
 		LocalDateTime actual = expression.next(last);
+		assertThat(actual).isNotNull();
 		assertThat(actual).isEqualTo(expected);

 		last = actual;
@@ -413,12 +430,14 @@ class CronExpressionTests {
 		LocalDateTime last = LocalDateTime.of(LocalDate.of(2009, 9, 26), LocalTime.now());
 		LocalDateTime expected = last.plusDays(2).withHour(7).withMinute(0).withSecond(0).withNano(0);
 		LocalDateTime actual = expression.next(last);
+		assertThat(actual).isNotNull();
 		assertThat(actual).isEqualTo(expected);

 		// Next day is a week day so add one
 		last = actual;
 		expected = expected.plusDays(1);
 		actual = expression.next(last);
+		assertThat(actual).isNotNull();
 		assertThat(actual).isEqualTo(expected);

 		last = actual;
@@ -433,12 +452,14 @@ class CronExpressionTests {
 		LocalDateTime last = LocalDateTime.of(LocalDate.of(2010, 12, 30), LocalTime.now());
 		LocalDateTime expected = last.plusMonths(1).withHour(23).withMinute(30).withSecond(0).withSecond(0).withNano(0);
 		LocalDateTime actual = expression.next(last);
+		assertThat(actual).isNotNull();
 		assertThat(actual).isEqualTo(expected);

 		// Next trigger is 3 months later
 		last = actual;
 		expected = expected.plusMonths(3);
 		actual = expression.next(last);
+		assertThat(actual).isNotNull();
 		assertThat(actual).isEqualTo(expected);

 		last = actual;
@@ -485,11 +506,13 @@ class CronExpressionTests {
 		LocalDateTime expected = LocalDateTime.of(last.getYear() + 1, 1, 1, 0, 0);

 		LocalDateTime actual = expression.next(last);
+		assertThat(actual).isNotNull();
 		assertThat(actual).isEqualTo(expected);

 		last = actual;
 		expected = expected.plusYears(1);
 		actual = expression.next(last);
+		assertThat(actual).isNotNull();
 		assertThat(actual).isEqualTo(expected);

 		last = actual;
@@ -513,11 +536,13 @@ class CronExpressionTests {
 		LocalDateTime expected = LocalDateTime.of(last.getYear(), 11, 1, 0, 0);

 		LocalDateTime actual = expression.next(last);
+		assertThat(actual).isNotNull();
 		assertThat(actual).isEqualTo(expected);

 		last = actual;
 		expected = expected.plusMonths(1);
 		actual = expression.next(last);
+		assertThat(actual).isNotNull();
 		assertThat(actual).isEqualTo(expected);

 		last = actual;
@@ -534,11 +559,13 @@ class CronExpressionTests {
 		LocalDateTime expected = last.with(next(SUNDAY)).withHour(0).withMinute(0).withSecond(0).withNano(0);

 		LocalDateTime actual = expression.next(last);
+		assertThat(actual).isNotNull();
 		assertThat(actual).isEqualTo(expected);

 		last = actual;
 		expected = expected.plusWeeks(1);
 		actual = expression.next(last);
+		assertThat(actual).isNotNull();
 		assertThat(actual).isEqualTo(expected);

 		last = actual;
@@ -555,11 +582,13 @@ class CronExpressionTests {
 		LocalDateTime expected = last.plusDays(1).withHour(0).withMinute(0).withSecond(0).withNano(0);

 		LocalDateTime actual = expression.next(last);
+		assertThat(actual).isNotNull();
 		assertThat(actual).isEqualTo(expected);

 		last = actual;
 		expected = expected.plusDays(1);
 		actual = expression.next(last);
+		assertThat(actual).isNotNull();
 		assertThat(actual).isEqualTo(expected);

 		last = actual;
@@ -583,11 +612,13 @@ class CronExpressionTests {
 		LocalDateTime expected = last.plusHours(1).withMinute(0).withSecond(0).withNano(0);

 		LocalDateTime actual = expression.next(last);
+		assertThat(actual).isNotNull();
 		assertThat(actual).isEqualTo(expected);

 		last = actual;
 		expected = expected.plusHours(1);
 		actual = expression.next(last);
+		assertThat(actual).isNotNull();
 		assertThat(actual).isEqualTo(expected);

 		last = actual;
@@ -603,16 +634,19 @@ class CronExpressionTests {
 		LocalDateTime last = LocalDateTime.of(LocalDate.of(2008, 1, 4), LocalTime.now());
 		LocalDateTime expected = LocalDateTime.of(2008, 1, 31, 0, 0);
 		LocalDateTime actual = expression.next(last);
+		assertThat(actual).isNotNull();
 		assertThat(actual).isEqualTo(expected);

 		last = actual;
 		expected = LocalDateTime.of(2008, 2, 29, 0, 0);
 		actual = expression.next(last);
+		assertThat(actual).isNotNull();
 		assertThat(actual).isEqualTo(expected);

 		last = actual;
 		expected = LocalDateTime.of(2008, 3, 31, 0, 0);
 		actual = expression.next(last);
+		assertThat(actual).isNotNull();
 		assertThat(actual).isEqualTo(expected);

 		last = actual;
@@ -628,16 +662,19 @@ class CronExpressionTests {
 		LocalDateTime last = LocalDateTime.of(LocalDate.of(2008, 1, 4), LocalTime.now());
 		LocalDateTime expected = LocalDateTime.of(2008, 1, 28, 0, 0);
 		LocalDateTime actual = expression.next(last);
+		assertThat(actual).isNotNull();
 		assertThat(actual).isEqualTo(expected);

 		last = actual;
 		expected = LocalDateTime.of(2008, 2, 26, 0, 0);
 		actual = expression.next(last);
+		assertThat(actual).isNotNull();
 		assertThat(actual).isEqualTo(expected);

 		last = actual;
 		expected = LocalDateTime.of(2008, 3, 28, 0, 0);
 		actual = expression.next(last);
+		assertThat(actual).isNotNull();
 		assertThat(actual).isEqualTo(expected);

 		last = actual;
@@ -1042,4 +1079,62 @@ class CronExpressionTests {
 		assertThat(actual).isEqualTo(expected);
 		assertThat(actual.getDayOfWeek()).isEqualTo(WEDNESDAY);
 	}
+
+	@Test
+	void dayOfMonthListWithQuartz() {
+		CronExpression expression = CronExpression.parse("0 0 0 1W,15,LW * ?");
+
+		LocalDateTime last = LocalDateTime.of(2019, 12, 30, 0, 0);
+		LocalDateTime expected = LocalDateTime.of(2019, 12, 31, 0, 0);
+		LocalDateTime actual = expression.next(last);
+		assertThat(actual).isNotNull();
+		assertThat(actual).isEqualTo(expected);
+		assertThat(actual).is(weekday);
+
+		last = actual;
+		expected = LocalDateTime.of(2020, 1, 1, 0, 0);
+		actual = expression.next(last);
+		assertThat(actual).isNotNull();
+		assertThat(actual).isEqualTo(expected);
+		assertThat(actual).is(weekday);
+
+		last = actual;
+		expected = LocalDateTime.of(2020, 1, 15, 0, 0);
+		actual = expression.next(last);
+		assertThat(actual).isNotNull();
+		assertThat(actual).isEqualTo(expected);
+
+		last = actual;
+		expected = LocalDateTime.of(2020, 1, 31, 0, 0);
+		actual = expression.next(last);
+		assertThat(actual).isNotNull();
+		assertThat(actual).isEqualTo(expected);
+		assertThat(actual).is(weekday);
+	}
+
+	@Test
+	void dayOfWeekListWithQuartz() {
+		CronExpression expression = CronExpression.parse("0 0 0 ? * THU#1,THU#3,THU#5");
+
+		LocalDateTime last = LocalDateTime.of(2019, 12, 31, 0, 0);
+		LocalDateTime expected = LocalDateTime.of(2020, 1, 2, 0, 0);
+		LocalDateTime actual = expression.next(last);
+		assertThat(actual).isNotNull();
+		assertThat(actual).isEqualTo(expected);
+		assertThat(actual.getDayOfWeek()).isEqualTo(THURSDAY);
+
+		last = actual;
+		expected = LocalDateTime.of(2020, 1, 16, 0, 0);
+		actual = expression.next(last);
+		assertThat(actual).isNotNull();
+		assertThat(actual).isEqualTo(expected);
+		assertThat(actual.getDayOfWeek()).isEqualTo(THURSDAY);
+
+		last = actual;
+		expected = LocalDateTime.of(2020, 1, 30, 0, 0);
+		actual = expression.next(last);
+		assertThat(actual).isNotNull();
+		assertThat(actual).isEqualTo(expected);
+		assertThat(actual.getDayOfWeek()).isEqualTo(THURSDAY);
+	}
 }
@@ -25,6 +25,8 @@ import static org.assertj.core.api.Assertions.assertThat;
 import static org.assertj.core.api.Assertions.assertThatIllegalArgumentException;

 /**
+ * Unit tests for {@link QuartzCronField}.
+ *
 * @author Arjen Poutsma
 */
 class QuartzCronFieldTests {
@@ -95,6 +97,7 @@ class QuartzCronFieldTests {
 		assertThatIllegalArgumentException().isThrownBy(() -> QuartzCronField.parseDaysOfWeek("1#L"));
 		assertThatIllegalArgumentException().isThrownBy(() -> QuartzCronField.parseDaysOfWeek("L#1"));
 		assertThatIllegalArgumentException().isThrownBy(() -> QuartzCronField.parseDaysOfWeek("8#1"));
+		assertThatIllegalArgumentException().isThrownBy(() -> QuartzCronField.parseDaysOfWeek("2#1,2#3,2#5"));
 	}

 }
@@ -1 +1,2 @@
 testbean.name=p3TestBean
+from.p3=p3Value
@@ -129,9 +129,9 @@ public abstract class AnnotationVisitor {
  }

  /**
-   * Visits an array value of the annotation. Note that arrays of primitive types (such as byte,
+   * Visits an array value of the annotation. Note that arrays of primitive values (such as byte,
   * boolean, short, char, int, long, float or double) can be passed as value to {@link #visit
-   * visit}. This is what {@link ClassReader} does.
+   * visit}. This is what {@link ClassReader} does for non empty arrays of primitive values.
   *
   * @param name the value name.
   * @return a visitor to visit the actual array value elements, or {@literal null} if this visitor
@@ -100,8 +100,10 @@ public class ClassReader {
  @Deprecated
  // DontCheck(MemberName): can't be renamed (for backward binary compatibility).
  public final byte[] b;
+
  /** The offset in bytes of the ClassFile's access_flags field. */
  public final int header;
+
  /**
   * A byte array containing the JVMS ClassFile structure to be parsed. <i>The content of this array
   * must not be modified. This field is intended for {@link Attribute} sub classes, and is normally
@@ -112,6 +114,7 @@ public class ClassReader {
   * ClassFile element offsets within this byte array.
   */
  final byte[] classFileBuffer;
+
  /**
   * The offset in bytes, in {@link #classFileBuffer}, of each cp_info entry of the ClassFile's
   * constant_pool array, <i>plus one</i>. In other words, the offset of constant pool entry i is
@@ -119,16 +122,19 @@ public class ClassReader {
   * 1].
   */
  private final int[] cpInfoOffsets;
+
  /**
   * The String objects corresponding to the CONSTANT_Utf8 constant pool items. This cache avoids
   * multiple parsing of a given CONSTANT_Utf8 constant pool item.
   */
  private final String[] constantUtf8Values;
+
  /**
   * The ConstantDynamic objects corresponding to the CONSTANT_Dynamic constant pool items. This
   * cache avoids multiple parsing of a given CONSTANT_Dynamic constant pool item.
   */
  private final ConstantDynamic[] constantDynamicValues;
+
  /**
   * The start offsets in {@link #classFileBuffer} of each element of the bootstrap_methods array
   * (in the BootstrapMethods attribute).
@@ -137,6 +143,7 @@ public class ClassReader {
   *     4.7.23</a>
   */
  private final int[] bootstrapMethodOffsets;
+
  /**
   * A conservative estimate of the maximum length of the strings contained in the constant pool of
   * the class.
@@ -184,7 +191,7 @@ public class ClassReader {
    this.b = classFileBuffer;
    // Check the class' major_version. This field is after the magic and minor_version fields, which
    // use 4 and 2 bytes respectively.
-    if (checkClassVersion && readShort(classFileOffset + 6) > Opcodes.V16) {
+    if (checkClassVersion && readShort(classFileOffset + 6) > Opcodes.V17) {
      throw new IllegalArgumentException(
          "Unsupported class file major version " + readShort(classFileOffset + 6));
    }
@@ -499,6 +506,9 @@ public class ClassReader {
      } else if (Constants.SYNTHETIC.equals(attributeName)) {
        accessFlags |= Opcodes.ACC_SYNTHETIC;
      } else if (Constants.SOURCE_DEBUG_EXTENSION.equals(attributeName)) {
+        if (attributeLength > classFileBuffer.length - currentAttributeOffset) {
+          throw new IllegalArgumentException();
+        }
        sourceDebugExtension =
            readUtf(currentAttributeOffset, attributeLength, new char[attributeLength]);
      } else if (Constants.RUNTIME_INVISIBLE_ANNOTATIONS.equals(attributeName)) {
@@ -1509,6 +1519,9 @@ public class ClassReader {
    final int maxLocals = readUnsignedShort(currentOffset + 2);
    final int codeLength = readInt(currentOffset + 4);
    currentOffset += 8;
+    if (codeLength > classFileBuffer.length - currentOffset) {
+      throw new IllegalArgumentException();
+    }

    // Read the bytecode 'code' array to create a label for each referenced instruction.
    final int bytecodeStartOffset = currentOffset;
@@ -2965,7 +2978,7 @@ public class ClassReader {
      // Parse the array_value array.
      while (numElementValuePairs-- > 0) {
        currentOffset =
-            readElementValue(annotationVisitor, currentOffset, /* elementName = */ null, charBuffer);
+            readElementValue(annotationVisitor, currentOffset, /* elementName= */ null, charBuffer);
      }
    }
    if (annotationVisitor != null) {
@@ -132,7 +132,7 @@ public interface Opcodes {
   * <pre>
   * public class StuffVisitor {
   *   &#64;Deprecated public void visitOldStuff(int arg, ...) {
-   *     visitNewStuf(arg | SOURCE_DEPRECATED, ...);
+   *     visitNewStuff(arg | SOURCE_DEPRECATED, ...);
   *   }
   *   public void visitNewStuff(int argAndSource...) {
   *     if ((argAndSource & SOURCE_DEPRECATED) == 0) {
@@ -154,7 +154,7 @@ public interface Opcodes {
   * <p>and there are two cases:
   *
   * <ul>
-   *   <li>call visitOldSuff: in the call to super.visitOldStuff, the source is set to
+   *   <li>call visitOldStuff: in the call to super.visitOldStuff, the source is set to
   *       SOURCE_DEPRECATED and visitNewStuff is called. Here 'do stuff' is run because the source
   *       was previously set to SOURCE_DEPRECATED, and execution eventually returns to
   *       UserStuffVisitor.visitOldStuff, where 'do user stuff' is run.
@@ -281,6 +281,7 @@ public interface Opcodes {
  int V14 = 0 << 16 | 58;
  int V15 = 0 << 16 | 59;
  int V16 = 0 << 16 | 60;
+  int V17 = 0 << 16 | 61;

  /**
   * Version flag indicating that the class is using 'preview' features.
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2018 the original author or authors.
+ * Copyright 2002-2020 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
@@ -16,20 +16,24 @@

 package org.springframework.core;

+import java.util.function.Function;
+
 import org.springframework.lang.Nullable;
+import org.springframework.util.Assert;

 /**
 * Interface defining a generic contract for attaching and accessing metadata
 * to/from arbitrary objects.
 *
 * @author Rob Harrop
+ * @author Sam Brannen
 * @since 2.0
 */
 public interface AttributeAccessor {

 	/**
 	 * Set the attribute defined by {@code name} to the supplied {@code value}.
-	 * If {@code value} is {@code null}, the attribute is {@link #removeAttribute removed}.
+	 * <p>If {@code value} is {@code null}, the attribute is {@link #removeAttribute removed}.
 	 * <p>In general, users should take care to prevent overlaps with other
 	 * metadata attributes by using fully-qualified names, perhaps using
 	 * class or package names as prefix.
@@ -40,16 +44,48 @@ public interface AttributeAccessor {

 	/**
 	 * Get the value of the attribute identified by {@code name}.
-	 * Return {@code null} if the attribute doesn't exist.
+	 * <p>Return {@code null} if the attribute doesn't exist.
 	 * @param name the unique attribute key
 	 * @return the current value of the attribute, if any
 	 */
 	@Nullable
 	Object getAttribute(String name);

+	/**
+	 * Compute a new value for the attribute identified by {@code name} if
+	 * necessary and {@linkplain #setAttribute set} the new value in this
+	 * {@code AttributeAccessor}.
+	 * <p>If a value for the attribute identified by {@code name} already exists
+	 * in this {@code AttributeAccessor}, the existing value will be returned
+	 * without applying the supplied compute function.
+	 * <p>The default implementation of this method is not thread safe but can
+	 * overridden by concrete implementations of this interface.
+	 * @param <T> the type of the attribute value
+	 * @param name the unique attribute key
+	 * @param computeFunction a function that computes a new value for the attribute
+	 * name; the function must not return a {@code null} value
+	 * @return the existing value or newly computed value for the named attribute
+	 * @see #getAttribute(String)
+	 * @see #setAttribute(String, Object)
+	 * @since 5.3.3
+	 */
+	@SuppressWarnings("unchecked")
+	default <T> T computeAttribute(String name, Function<String, T> computeFunction) {
+		Assert.notNull(name, "Name must not be null");
+		Assert.notNull(computeFunction, "Compute function must not be null");
+		Object value = getAttribute(name);
+		if (value == null) {
+			value = computeFunction.apply(name);
+			Assert.state(value != null,
+					() -> String.format("Compute function must not return null for attribute named '%s'", name));
+			setAttribute(name, value);
+		}
+		return (T) value;
+	}
+
 	/**
 	 * Remove the attribute identified by {@code name} and return its value.
-	 * Return {@code null} if no attribute under {@code name} is found.
+	 * <p>Return {@code null} if no attribute under {@code name} is found.
 	 * @param name the unique attribute key
 	 * @return the last value of the attribute, if any
 	 */
@@ -58,7 +94,7 @@ public interface AttributeAccessor {

 	/**
 	 * Return {@code true} if the attribute identified by {@code name} exists.
-	 * Otherwise return {@code false}.
+	 * <p>Otherwise return {@code false}.
 	 * @param name the unique attribute key
 	 */
 	boolean hasAttribute(String name);
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2018 the original author or authors.
+ * Copyright 2002-2020 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
@@ -19,6 +19,7 @@ package org.springframework.core;
 import java.io.Serializable;
 import java.util.LinkedHashMap;
 import java.util.Map;
+import java.util.function.Function;

 import org.springframework.lang.Nullable;
 import org.springframework.util.Assert;
@@ -32,6 +33,7 @@ import org.springframework.util.StringUtils;
 *
 * @author Rob Harrop
 * @author Juergen Hoeller
+ * @author Sam Brannen
 * @since 2.0
 */
@SuppressWarnings("serial")
@@ -59,6 +61,17 @@ public abstract class AttributeAccessorSupport implements AttributeAccessor, Ser
 		return this.attributes.get(name);
 	}

+	@Override
+	@SuppressWarnings("unchecked")
+	public <T> T computeAttribute(String name, Function<String, T> computeFunction) {
+		Assert.notNull(name, "Name must not be null");
+		Assert.notNull(computeFunction, "Compute function must not be null");
+		Object value = this.attributes.computeIfAbsent(name, computeFunction);
+		Assert.state(value != null,
+				() -> String.format("Compute function must not return null for attribute named '%s'", name));
+		return (T) value;
+	}
+
 	@Override
 	@Nullable
 	public Object removeAttribute(String name) {
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2020 the original author or authors.
+ * Copyright 2002-2021 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
@@ -60,7 +60,28 @@ public class ReactiveAdapterRegistry {
 	@Nullable
 	private static volatile ReactiveAdapterRegistry sharedInstance;

-	private final boolean reactorPresent;
+	private static final boolean reactorPresent;
+
+	private static final boolean rxjava1Present;
+
+	private static final boolean rxjava2Present;
+
+	private static final boolean rxjava3Present;
+
+	private static final boolean flowPublisherPresent;
+
+	private static final boolean kotlinCoroutinesPresent;
+
+	static {
+		ClassLoader classLoader = ReactiveAdapterRegistry.class.getClassLoader();
+		reactorPresent = ClassUtils.isPresent("reactor.core.publisher.Flux", classLoader);
+		rxjava1Present = ClassUtils.isPresent("rx.Observable", classLoader) &&
+				ClassUtils.isPresent("rx.RxReactiveStreams", classLoader);
+		rxjava2Present = ClassUtils.isPresent("io.reactivex.Flowable", classLoader);
+		rxjava3Present = ClassUtils.isPresent("io.reactivex.rxjava3.core.Flowable", classLoader);
+		flowPublisherPresent = ClassUtils.isPresent("java.util.concurrent.Flow.Publisher", classLoader);
+		kotlinCoroutinesPresent = ClassUtils.isPresent("kotlinx.coroutines.reactor.MonoKt", classLoader);
+	}

 	private final List<ReactiveAdapter> adapters = new ArrayList<>();

@@ -70,41 +91,34 @@ public class ReactiveAdapterRegistry {
 	 * @see #getSharedInstance()
 	 */
 	public ReactiveAdapterRegistry() {
-		ClassLoader classLoader = ReactiveAdapterRegistry.class.getClassLoader();
-
 		// Reactor
-		boolean reactorRegistered = false;
-		if (ClassUtils.isPresent("reactor.core.publisher.Flux", classLoader)) {
+		if (reactorPresent) {
 			new ReactorRegistrar().registerAdapters(this);
-			reactorRegistered = true;
 		}
-		this.reactorPresent = reactorRegistered;

 		// RxJava1 (deprecated)
-		if (ClassUtils.isPresent("rx.Observable", classLoader) &&
-				ClassUtils.isPresent("rx.RxReactiveStreams", classLoader)) {
+		if (rxjava1Present) {
 			new RxJava1Registrar().registerAdapters(this);
 		}

 		// RxJava2
-		if (ClassUtils.isPresent("io.reactivex.Flowable", classLoader)) {
+		if (rxjava2Present) {
 			new RxJava2Registrar().registerAdapters(this);
 		}
-
 		// RxJava3
-		if (ClassUtils.isPresent("io.reactivex.rxjava3.core.Flowable", classLoader)) {
+		if (rxjava3Present) {
 			new RxJava3Registrar().registerAdapters(this);
 		}

 		// Java 9+ Flow.Publisher
-		if (ClassUtils.isPresent("java.util.concurrent.Flow.Publisher", classLoader)) {
+		if (flowPublisherPresent) {
 			new ReactorJdkFlowAdapterRegistrar().registerAdapter(this);
 		}
 		// If not present, do nothing for the time being...
 		// We can fall back on "reactive-streams-flow-bridge" (once released)

-		// Coroutines
-		if (this.reactorPresent && ClassUtils.isPresent("kotlinx.coroutines.reactor.MonoKt", classLoader)) {
+		// Kotlin Coroutines
+		if (reactorPresent && kotlinCoroutinesPresent) {
 			new CoroutinesRegistrar().registerAdapters(this);
 		}
 	}
@@ -125,7 +139,7 @@ public class ReactiveAdapterRegistry {
 	public void registerReactiveType(ReactiveTypeDescriptor descriptor,
 			Function<Object, Publisher<?>> toAdapter, Function<Publisher<?>, Object> fromAdapter) {

-		if (this.reactorPresent) {
+		if (reactorPresent) {
 			this.adapters.add(new ReactorAdapter(descriptor, toAdapter, fromAdapter));
 		}
 		else {
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2019 the original author or authors.
+ * Copyright 2002-2020 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
@@ -17,39 +17,61 @@
 package org.springframework.core;

 import java.util.Arrays;
+import java.util.concurrent.atomic.AtomicInteger;
+import java.util.function.Function;

 import org.junit.jupiter.api.Test;

 import static org.assertj.core.api.Assertions.assertThat;

 /**
+ * Unit tests for {@link AttributeAccessorSupport}.
+ *
 * @author Rob Harrop
 * @author Sam Brannen
 * @since 2.0
 */
 class AttributeAccessorSupportTests {

-	private static final String NAME = "foo";
+	private static final String NAME = "name";

-	private static final String VALUE = "bar";
+	private static final String VALUE = "value";
+
+	private final AttributeAccessor attributeAccessor = new SimpleAttributeAccessorSupport();

-	private AttributeAccessor attributeAccessor = new SimpleAttributeAccessorSupport();

 	@Test
-	void setAndGet() throws Exception {
+	void setAndGet() {
 		this.attributeAccessor.setAttribute(NAME, VALUE);
 		assertThat(this.attributeAccessor.getAttribute(NAME)).isEqualTo(VALUE);
 	}

 	@Test
-	void setAndHas() throws Exception {
+	void setAndHas() {
 		assertThat(this.attributeAccessor.hasAttribute(NAME)).isFalse();
 		this.attributeAccessor.setAttribute(NAME, VALUE);
 		assertThat(this.attributeAccessor.hasAttribute(NAME)).isTrue();
 	}

 	@Test
-	void remove() throws Exception {
+	void computeAttribute() {
+		AtomicInteger atomicInteger = new AtomicInteger();
+		Function<String, String> computeFunction = name -> "computed-" + atomicInteger.incrementAndGet();
+
+		assertThat(this.attributeAccessor.hasAttribute(NAME)).isFalse();
+		this.attributeAccessor.computeAttribute(NAME, computeFunction);
+		assertThat(this.attributeAccessor.getAttribute(NAME)).isEqualTo("computed-1");
+		this.attributeAccessor.computeAttribute(NAME, computeFunction);
+		assertThat(this.attributeAccessor.getAttribute(NAME)).isEqualTo("computed-1");
+
+		this.attributeAccessor.removeAttribute(NAME);
+		assertThat(this.attributeAccessor.hasAttribute(NAME)).isFalse();
+		this.attributeAccessor.computeAttribute(NAME, computeFunction);
+		assertThat(this.attributeAccessor.getAttribute(NAME)).isEqualTo("computed-2");
+	}
+
+	@Test
+	void remove() {
 		assertThat(this.attributeAccessor.hasAttribute(NAME)).isFalse();
 		this.attributeAccessor.setAttribute(NAME, VALUE);
 		assertThat(this.attributeAccessor.removeAttribute(NAME)).isEqualTo(VALUE);
@@ -57,13 +79,13 @@ class AttributeAccessorSupportTests {
 	}

 	@Test
-	void attributeNames() throws Exception {
+	void attributeNames() {
 		this.attributeAccessor.setAttribute(NAME, VALUE);
 		this.attributeAccessor.setAttribute("abc", "123");
 		String[] attributeNames = this.attributeAccessor.attributeNames();
 		Arrays.sort(attributeNames);
-		assertThat(Arrays.binarySearch(attributeNames, NAME) > -1).isTrue();
-		assertThat(Arrays.binarySearch(attributeNames, "abc") > -1).isTrue();
+		assertThat(Arrays.binarySearch(attributeNames, "abc")).isEqualTo(0);
+		assertThat(Arrays.binarySearch(attributeNames, NAME)).isEqualTo(1);
 	}

 	@SuppressWarnings("serial")
@@ -433,7 +433,7 @@ public abstract class AbstractJdbcCall {
 	/**
 	 * Match the provided in parameter values with registered parameters and
 	 * parameters defined via meta-data processing.
-	 * @param parameterSource the parameter vakues provided as a {@link SqlParameterSource}
+	 * @param parameterSource the parameter values provided as a {@link SqlParameterSource}
 	 * @return a Map with parameter names and values
 	 */
 	protected Map<String, Object> matchInParameterValuesWithCallParameters(SqlParameterSource parameterSource) {
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2020 the original author or authors
+ * Copyright 2002-2021 the original author or authors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
@@ -54,8 +54,10 @@ inline fun <reified T> JdbcOperations.queryForObject(sql: String, args: Array<ou
 * @author Mario Arias
 * @since 5.0
 */
+@Suppress("DEPRECATION")
+// TODO Replace by the vararg variant in Spring Framework 6
 inline fun <reified T> JdbcOperations.queryForObject(sql: String, args: Array<out Any>): T? =
-		queryForObject(sql, T::class.java, args) as T
+		queryForObject(sql, args, T::class.java) as T

 /**
 * Extension for [JdbcOperations.queryForList] providing a `queryForList<Foo>("...")` variant.
@@ -86,8 +88,11 @@ inline fun <reified T> JdbcOperations.queryForList(sql: String, args: Array<out
 * @author Mario Arias
 * @since 5.0
 */
+@Suppress("DEPRECATION")
+// TODO Replace by the vararg variant in Spring Framework 6
 inline fun <reified T> JdbcOperations.queryForList(sql: String, args: Array<out Any>): List<T> =
-		queryForList(sql, T::class.java, args)
+		queryForList(sql, args, T::class.java)
+

 /**
 * Extension for [JdbcOperations.query] providing a ResultSetExtractor-like function
@@ -247,7 +247,7 @@
 			<value>03000,42000,42601,42602,42622,42804,42P01</value>
 		</property>
 		<property name="duplicateKeyCodes">
-			<value>23505</value>
+			<value>21000,23505</value>
 		</property>
 		<property name="dataIntegrityViolationCodes">
 			<value>23000,23502,23503,23514</value>
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2020 the original author or authors
+ * Copyright 2002-2021 the original author or authors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
@@ -67,11 +67,12 @@ class JdbcOperationsExtensionsTests {
 	}

 	@Test
+	@Suppress("DEPRECATION")
 	fun `queryForObject with reified type parameters and args`() {
-		val args = arrayOf(3)
-		every { template.queryForObject(sql, any<Class<Int>>(), args) } returns 2
+		val args = arrayOf(3, 4)
+		every { template.queryForObject(sql, args, any<Class<Int>>()) } returns 2
 		assertThat(template.queryForObject<Int>(sql, args)).isEqualTo(2)
-		verify { template.queryForObject(sql, any<Class<Int>>(), args) }
+		verify { template.queryForObject(sql, args, any<Class<Int>>()) }
 	}

 	@Test
@@ -93,12 +94,13 @@ class JdbcOperationsExtensionsTests {
 	}

 	@Test
+	@Suppress("DEPRECATION")
 	fun `queryForList with reified type parameters and args`() {
 		val list = listOf(1, 2, 3)
-		val args = arrayOf(3)
-		every { template.queryForList(sql, any<Class<Int>>(), args) } returns list
+		val args = arrayOf(3, 4)
+		every { template.queryForList(sql, args, any<Class<Int>>()) } returns list
 		template.queryForList<Int>(sql, args)
-		verify { template.queryForList(sql, any<Class<Int>>(), args) }
+		verify { template.queryForList(sql, args, any<Class<Int>>()) }
 	}

 	@Test
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2019 the original author or authors.
+ * Copyright 2002-2021 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
@@ -38,6 +38,7 @@ import org.springframework.core.annotation.AnnotationUtils;
 import org.springframework.core.codec.Decoder;
 import org.springframework.core.codec.DecodingException;
 import org.springframework.core.io.buffer.DataBuffer;
+import org.springframework.core.io.buffer.DataBufferUtils;
 import org.springframework.lang.Nullable;
 import org.springframework.messaging.Message;
 import org.springframework.messaging.MessageHeaders;
@@ -232,6 +233,7 @@ public class PayloadMethodArgumentResolver implements HandlerMethodArgumentResol
 			if (decoder.canDecode(elementType, mimeType)) {
 				if (adapter != null && adapter.isMultiValue()) {
 					Flux<?> flux = content
+							.filter(this::nonEmptyDataBuffer)
 							.map(buffer -> decoder.decode(buffer, elementType, mimeType, hints))
 							.onErrorResume(ex -> Flux.error(handleReadError(parameter, message, ex)));
 					if (isContentRequired) {
@@ -245,6 +247,7 @@ public class PayloadMethodArgumentResolver implements HandlerMethodArgumentResol
 				else {
 					// Single-value (with or without reactive type wrapper)
 					Mono<?> mono = content.next()
+							.filter(this::nonEmptyDataBuffer)
 							.map(buffer -> decoder.decode(buffer, elementType, mimeType, hints))
 							.onErrorResume(ex -> Mono.error(handleReadError(parameter, message, ex)));
 					if (isContentRequired) {
@@ -262,6 +265,14 @@ public class PayloadMethodArgumentResolver implements HandlerMethodArgumentResol
 				message, parameter, "Cannot decode to [" + targetType + "]" + message));
 	}

+	private boolean nonEmptyDataBuffer(DataBuffer buffer) {
+		if (buffer.readableByteCount() > 0) {
+			return true;
+		}
+		DataBufferUtils.release(buffer);
+		return false;
+	}
+
 	private Throwable handleReadError(MethodParameter parameter, Message<?> message, Throwable ex) {
 		return ex instanceof DecodingException ?
 				new MethodArgumentResolutionException(message, parameter, "Failed to read HTTP message", ex) : ex;
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2019 the original author or authors.
+ * Copyright 2002-2021 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
@@ -34,10 +34,24 @@ import org.springframework.util.ConcurrentReferenceHashMap;
 *
 * @author Rossen Stoyanchev
 * @author Juergen Hoeller
+ * @author Sam Brannen
 * @since 4.0
 */
 public abstract class AbstractExceptionHandlerMethodResolver {

+	private static final Method NO_MATCHING_EXCEPTION_HANDLER_METHOD;
+
+	static {
+		try {
+			NO_MATCHING_EXCEPTION_HANDLER_METHOD =
+					AbstractExceptionHandlerMethodResolver.class.getDeclaredMethod("noMatchingExceptionHandler");
+		}
+		catch (NoSuchMethodException ex) {
+			throw new IllegalStateException("Expected method not found: " + ex);
+		}
+	}
+
+
 	private final Map<Class<? extends Throwable>, Method> mappedMethods = new HashMap<>(16);

 	private final Map<Class<? extends Throwable>, Method> exceptionLookupCache = new ConcurrentReferenceHashMap<>(16);
@@ -52,9 +66,9 @@ public abstract class AbstractExceptionHandlerMethodResolver {
 	}

 	/**
-	 * Extract the exceptions this method handles.This implementation looks for
+	 * Extract the exceptions this method handles. This implementation looks for
 	 * sub-classes of Throwable in the method signature.
-	 * The method is static to ensure safe use from sub-class constructors.
+	 * <p>The method is static to ensure safe use from sub-class constructors.
 	 */
 	@SuppressWarnings("unchecked")
 	protected static List<Class<? extends Throwable>> getExceptionsFromMethodSignature(Method method) {
@@ -80,7 +94,7 @@ public abstract class AbstractExceptionHandlerMethodResolver {

 	/**
 	 * Find a {@link Method} to handle the given exception.
-	 * Use {@link ExceptionDepthComparator} if more than one match is found.
+	 * <p>Uses {@link ExceptionDepthComparator} if more than one match is found.
 	 * @param exception the exception
 	 * @return a Method to handle the exception, or {@code null} if none found
 	 */
@@ -99,6 +113,7 @@ public abstract class AbstractExceptionHandlerMethodResolver {
 	/**
 	 * Find a {@link Method} to handle the given exception type. This can be
 	 * useful if an {@link Exception} instance is not available (e.g. for tools).
+	 * <p>Uses {@link ExceptionDepthComparator} if more than one match is found.
 	 * @param exceptionType the exception type
 	 * @return a Method to handle the exception, or {@code null} if none found
 	 * @since 4.3.1
@@ -110,11 +125,12 @@ public abstract class AbstractExceptionHandlerMethodResolver {
 			method = getMappedMethod(exceptionType);
 			this.exceptionLookupCache.put(exceptionType, method);
 		}
-		return method;
+		return (method != NO_MATCHING_EXCEPTION_HANDLER_METHOD ? method : null);
 	}

 	/**
-	 * Return the {@link Method} mapped to the given exception type, or {@code null} if none.
+	 * Return the {@link Method} mapped to the given exception type, or
+	 * {@link #NO_MATCHING_EXCEPTION_HANDLER_METHOD} if none.
 	 */
 	@Nullable
 	private Method getMappedMethod(Class<? extends Throwable> exceptionType) {
@@ -125,12 +141,21 @@ public abstract class AbstractExceptionHandlerMethodResolver {
 			}
 		}
 		if (!matches.isEmpty()) {
-			matches.sort(new ExceptionDepthComparator(exceptionType));
+			if (matches.size() > 1) {
+				matches.sort(new ExceptionDepthComparator(exceptionType));
+			}
 			return this.mappedMethods.get(matches.get(0));
 		}
 		else {
-			return null;
+			return NO_MATCHING_EXCEPTION_HANDLER_METHOD;
 		}
 	}

+	/**
+	 * For the {@link #NO_MATCHING_EXCEPTION_HANDLER_METHOD} constant.
+	 */
+	@SuppressWarnings("unused")
+	private void noMatchingExceptionHandler() {
+	}
+
 }
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2020 the original author or authors.
+ * Copyright 2002-2021 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
@@ -19,7 +19,6 @@ package org.springframework.messaging.rsocket;
 import java.time.Duration;
 import java.util.concurrent.atomic.AtomicInteger;

-import io.rsocket.Payload;
 import io.rsocket.RSocket;
 import io.rsocket.SocketAcceptor;
 import io.rsocket.core.RSocketServer;
@@ -43,6 +42,7 @@ import org.springframework.context.annotation.Configuration;
 import org.springframework.messaging.handler.annotation.Header;
 import org.springframework.messaging.handler.annotation.MessageExceptionHandler;
 import org.springframework.messaging.handler.annotation.MessageMapping;
+import org.springframework.messaging.handler.annotation.Payload;
 import org.springframework.messaging.rsocket.annotation.ConnectMapping;
 import org.springframework.messaging.rsocket.annotation.support.RSocketMessageHandler;
 import org.springframework.stereotype.Controller;
@@ -164,6 +164,12 @@ public class RSocketClientToServerIntegrationTests {
 				.verify(Duration.ofSeconds(5));
 	}

+	@Test // gh-26344
+	public void echoChannelWithEmptyInput() {
+		Flux<String> result = requester.route("echo-channel-empty").data(Flux.empty()).retrieveFlux(String.class);
+		StepVerifier.create(result).verifyComplete();
+	}
+
 	@Test
 	public void metadataPush() {
 		Flux.just("bar", "baz")
@@ -254,6 +260,11 @@ public class RSocketClientToServerIntegrationTests {
 			return payloads.delayElements(Duration.ofMillis(10)).map(payload -> payload + " async");
 		}

+		@MessageMapping("echo-channel-empty")
+		Flux<String> echoChannelEmpty(@Payload(required = false) Flux<String> payloads) {
+			return payloads.map(payload -> payload + " echoed");
+		}
+
 		@MessageMapping("thrown-exception")
 		Mono<String> handleAndThrow(String payload) {
 			throw new IllegalArgumentException("Invalid input error");
@@ -338,29 +349,29 @@ public class RSocketClientToServerIntegrationTests {
 		}

 		@Override
-		public Mono<Void> fireAndForget(Payload payload) {
+		public Mono<Void> fireAndForget(io.rsocket.Payload payload) {
 			return this.delegate.fireAndForget(payload)
 					.doOnSuccess(aVoid -> this.fireAndForgetCount.incrementAndGet());
 		}

 		@Override
-		public Mono<Void> metadataPush(Payload payload) {
+		public Mono<Void> metadataPush(io.rsocket.Payload payload) {
 			return this.delegate.metadataPush(payload)
 					.doOnSuccess(aVoid -> this.metadataPushCount.incrementAndGet());
 		}

 		@Override
-		public Mono<Payload> requestResponse(Payload payload) {
+		public Mono<io.rsocket.Payload> requestResponse(io.rsocket.Payload payload) {
 			return this.delegate.requestResponse(payload);
 		}

 		@Override
-		public Flux<Payload> requestStream(Payload payload) {
+		public Flux<io.rsocket.Payload> requestStream(io.rsocket.Payload payload) {
 			return this.delegate.requestStream(payload);
 		}

 		@Override
-		public Flux<Payload> requestChannel(Publisher<Payload> payloads) {
+		public Flux<io.rsocket.Payload> requestChannel(Publisher<io.rsocket.Payload> payloads) {
 			return this.delegate.requestChannel(payloads);
 		}
 	}
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2018 the original author or authors.
+ * Copyright 2002-2020 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
@@ -21,6 +21,7 @@ import java.io.File;
 import java.io.IOException;
 import java.io.InputStream;

+import org.springframework.lang.NonNull;
 import org.springframework.lang.Nullable;
 import org.springframework.util.Assert;
 import org.springframework.util.FileCopyUtils;
@@ -42,10 +43,10 @@ public class MockMultipartFile implements MultipartFile {

 	private final String name;

-	private String originalFilename;
+	private final String originalFilename;

 	@Nullable
-	private String contentType;
+	private final String contentType;

 	private final byte[] content;

@@ -79,7 +80,7 @@ public class MockMultipartFile implements MultipartFile {
 	public MockMultipartFile(
 			String name, @Nullable String originalFilename, @Nullable String contentType, @Nullable byte[] content) {

-		Assert.hasLength(name, "Name must not be null");
+		Assert.hasLength(name, "Name must not be empty");
 		this.name = name;
 		this.originalFilename = (originalFilename != null ? originalFilename : "");
 		this.contentType = contentType;
@@ -108,6 +109,7 @@ public class MockMultipartFile implements MultipartFile {
 	}

 	@Override
+	@NonNull
 	public String getOriginalFilename() {
 		return this.originalFilename;
 	}
@@ -179,7 +179,7 @@ abstract class BootstrapUtils {
 	}

 	private static Class<?> resolveDefaultTestContextBootstrapper(Class<?> testClass) throws Exception {
-		boolean webApp = (TestContextAnnotationUtils.findMergedAnnotation(testClass, webAppConfigurationClass) != null);
+		boolean webApp = TestContextAnnotationUtils.hasAnnotation(testClass, webAppConfigurationClass);
 		String bootstrapperClassName = (webApp ? DEFAULT_WEB_TEST_CONTEXT_BOOTSTRAPPER_CLASS_NAME :
 				DEFAULT_TEST_CONTEXT_BOOTSTRAPPER_CLASS_NAME);
 		return ClassUtils.forName(bootstrapperClassName, BootstrapUtils.class.getClassLoader());
@@ -78,6 +78,22 @@ public abstract class TestContextAnnotationUtils {
 	private static volatile EnclosingConfiguration defaultEnclosingConfigurationMode;


+	/**
+	 * Determine if an annotation of the specified {@code annotationType} is
+	 * present or meta-present on the supplied {@link Class} according to the
+	 * search algorithm used in {@link #findMergedAnnotation(Class, Class)}.
+	 * <p>If this method returns {@code true}, then {@code findMergedAnnotation(...)}
+	 * will return a non-null value.
+	 * @param clazz the class to look for annotations on
+	 * @param annotationType the type of annotation to look for
+	 * @return {@code true} if a matching annotation is present
+	 * @since 5.3.3
+	 * @see #findMergedAnnotation(Class, Class)
+	 */
+	public static boolean hasAnnotation(Class<?> clazz, Class<? extends Annotation> annotationType) {
+		return (findMergedAnnotation(clazz, annotationType) != null);
+	}
+
 	/**
 	 * Find the first annotation of the specified {@code annotationType} within
 	 * the annotation hierarchy <em>above</em> the supplied class, merge that
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2019 the original author or authors.
+ * Copyright 2002-2020 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
@@ -48,6 +48,8 @@ package org.springframework.test.context;
 * ServletTestExecutionListener}</li>
 * <li>{@link org.springframework.test.context.support.DirtiesContextBeforeModesTestExecutionListener
 * DirtiesContextBeforeModesTestExecutionListener}</li>
+ * <li>{@link org.springframework.test.context.event.ApplicationEventsTestExecutionListener
+ * ApplicationEventsTestExecutionListener}</li>
 * <li>{@link org.springframework.test.context.support.DependencyInjectionTestExecutionListener
 * DependencyInjectionTestExecutionListener}</li>
 * <li>{@link org.springframework.test.context.support.DirtiesContextTestExecutionListener
@@ -67,6 +67,7 @@ public @interface TestExecutionListeners {
 	 * {@link #value}, but it may be used instead of {@link #value}.
 	 * @see org.springframework.test.context.web.ServletTestExecutionListener
 	 * @see org.springframework.test.context.support.DirtiesContextBeforeModesTestExecutionListener
+	 * @see org.springframework.test.context.event.ApplicationEventsTestExecutionListener
 	 * @see org.springframework.test.context.support.DependencyInjectionTestExecutionListener
 	 * @see org.springframework.test.context.support.DirtiesContextTestExecutionListener
 	 * @see org.springframework.test.context.transaction.TransactionalTestExecutionListener
@@ -0,0 +1,82 @@
+/*
+ * Copyright 2002-2020 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.test.context.event;
+
+import java.util.stream.Stream;
+
+import org.springframework.context.ApplicationEvent;
+
+/**
+ * {@code ApplicationEvents} encapsulates all {@linkplain ApplicationEvent
+ * application events} that were fired during the execution of a single test method.
+ *
+ * <p>To use {@code ApplicationEvents} in your tests, do the following.
+ * <ul>
+ * <li>Ensure that your test class is annotated or meta-annotated with
+ * {@link RecordApplicationEvents @RecordApplicationEvents}.</li>
+ * <li>Ensure that the {@link ApplicationEventsTestExecutionListener} is
+ * registered. Note, however, that it is registered by default and only needs
+ * to be manually registered if you have custom configuration via
+ * {@link org.springframework.test.context.TestExecutionListeners @TestExecutionListeners}
+ * that does not include the default listeners.</li>
+ * <li>Annotate a field of type {@code ApplicationEvents} with
+ * {@link org.springframework.beans.factory.annotation.Autowired @Autowired} and
+ * use that instance of {@code ApplicationEvents} in your test and lifecycle methods.</li>
+ * <li>With JUnit Jupiter, you may optionally declare a parameter of type
+ * {@code ApplicationEvents} in a test or lifecycle method as an alternative to
+ * an {@code @Autowired} field in the test class.</li>
+ * </ul>
+ *
+ * @author Sam Brannen
+ * @author Oliver Drotbohm
+ * @since 5.3.3
+ * @see RecordApplicationEvents
+ * @see ApplicationEventsTestExecutionListener
+ * @see org.springframework.context.ApplicationEvent
+ */
+public interface ApplicationEvents {
+
+	/**
+	 * Stream all application events that were fired during test execution.
+	 * @return a stream of all application events
+	 * @see #stream(Class)
+	 * @see #clear()
+	 */
+	Stream<ApplicationEvent> stream();
+
+	/**
+	 * Stream all application events or event payloads of the given type that
+	 * were fired during test execution.
+	 * @param <T> the event type
+	 * @param type the type of events or payloads to stream; never {@code null}
+	 * @return a stream of all application events or event payloads of the
+	 * specified type
+	 * @see #stream()
+	 * @see #clear()
+	 */
+	<T> Stream<T> stream(Class<T> type);
+
+	/**
+	 * Clear all application events recorded by this {@code ApplicationEvents} instance.
+	 * <p>Subsequent calls to {@link #stream()} or {@link #stream(Class)} will
+	 * only include events recorded since this method was invoked.
+	 * @see #stream()
+	 * @see #stream(Class)
+	 */
+	void clear();
+
+}
@@ -0,0 +1,41 @@
+/*
+ * Copyright 2002-2020 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.test.context.event;
+
+import org.springframework.context.ApplicationEvent;
+import org.springframework.context.ApplicationListener;
+
+/**
+ * {@link ApplicationListener} that listens to all events and adds them to the
+ * current {@link ApplicationEvents} instance if registered for the current thread.
+ *
+ * @author Sam Brannen
+ * @author Oliver Drotbohm
+ * @since 5.3.3
+ */
+class ApplicationEventsApplicationListener implements ApplicationListener<ApplicationEvent> {
+
+	@Override
+	public void onApplicationEvent(ApplicationEvent event) {
+		DefaultApplicationEvents applicationEvents =
+				(DefaultApplicationEvents) ApplicationEventsHolder.getApplicationEvents();
+		if (applicationEvents != null) {
+			applicationEvents.addEvent(event);
+		}
+	}
+
+}
@@ -0,0 +1,107 @@
+/*
+ * Copyright 2002-2020 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.test.context.event;
+
+import org.springframework.lang.Nullable;
+import org.springframework.util.Assert;
+
+/**
+ * Holder class to expose the application events published during the execution
+ * of a test in the form of a thread-bound {@link ApplicationEvents} object.
+ *
+ * <p>{@code ApplicationEvents} are registered in this holder and managed by
+ * the {@link ApplicationEventsTestExecutionListener}.
+ *
+ * <p>Although this class is {@code public}, it is only intended for use within
+ * the <em>Spring TestContext Framework</em> or in the implementation of
+ * third-party extensions. Test authors should therefore allow the current
+ * instance of {@code ApplicationEvents} to be
+ * {@link org.springframework.beans.factory.annotation.Autowired @Autowired}
+ * into a field in the test class or injected via a parameter in test and
+ * lifecycle methods when using JUnit Jupiter and the {@link
+ * org.springframework.test.context.junit.jupiter.SpringExtension SpringExtension}.
+ *
+ * @author Sam Brannen
+ * @author Oliver Drotbohm
+ * @since 5.3.3
+ * @see ApplicationEvents
+ * @see RecordApplicationEvents
+ * @see ApplicationEventsTestExecutionListener
+ */
+public abstract class ApplicationEventsHolder {
+
+	private static final ThreadLocal<DefaultApplicationEvents> applicationEvents = new ThreadLocal<>();
+
+
+	private ApplicationEventsHolder() {
+		// no-op to prevent instantiation of this holder class
+	}
+
+
+	/**
+	 * Get the {@link ApplicationEvents} for the current thread.
+	 * @return the current {@code ApplicationEvents}, or {@code null} if not registered
+	 */
+	@Nullable
+	public static ApplicationEvents getApplicationEvents() {
+		return applicationEvents.get();
+	}
+
+	/**
+	 * Get the {@link ApplicationEvents} for the current thread.
+	 * @return the current {@code ApplicationEvents}
+	 * @throws IllegalStateException if an instance of {@code ApplicationEvents}
+	 * has not been registered for the current thread
+	 */
+	@Nullable
+	public static ApplicationEvents getRequiredApplicationEvents() {
+		ApplicationEvents events = applicationEvents.get();
+		Assert.state(events != null, "Failed to retrieve ApplicationEvents for the current thread. " +
+				"Ensure that your test class is annotated with @RecordApplicationEvents " +
+				"and that the ApplicationEventsTestExecutionListener is registered.");
+		return events;
+	}
+
+
+	/**
+	 * Register a new {@link DefaultApplicationEvents} instance to be used for the
+	 * current thread, if necessary.
+	 * <p>If {@link #registerApplicationEvents()} has already been called for the
+	 * current thread, this method does not do anything.
+	 */
+	static void registerApplicationEventsIfNecessary() {
+		if (getApplicationEvents() == null) {
+			registerApplicationEvents();
+		}
+	}
+
+	/**
+	 * Register a new {@link DefaultApplicationEvents} instance to be used for the
+	 * current thread.
+	 */
+	static void registerApplicationEvents() {
+		applicationEvents.set(new DefaultApplicationEvents());
+	}
+
+	/**
+	 * Remove the registration of the {@link ApplicationEvents} for the current thread.
+	 */
+	static void unregisterApplicationEvents() {
+		applicationEvents.remove();
+	}
+
+}
@@ -0,0 +1,138 @@
+/*
+ * Copyright 2002-2020 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.test.context.event;
+
+import java.io.Serializable;
+
+import org.springframework.beans.factory.ObjectFactory;
+import org.springframework.beans.factory.config.ConfigurableListableBeanFactory;
+import org.springframework.context.ApplicationContext;
+import org.springframework.context.support.AbstractApplicationContext;
+import org.springframework.core.Conventions;
+import org.springframework.test.context.TestContext;
+import org.springframework.test.context.TestContextAnnotationUtils;
+import org.springframework.test.context.support.AbstractTestExecutionListener;
+import org.springframework.util.Assert;
+
+/**
+ * {@code TestExecutionListener} which provides support for {@link ApplicationEvents}.
+ *
+ * <p>This listener manages the registration of {@code ApplicationEvents} for the
+ * current thread at various points within the test execution lifecycle and makes
+ * the current instance of {@code ApplicationEvents} available to tests via an
+ * {@link org.springframework.beans.factory.annotation.Autowired @Autowired}
+ * field in the test class.
+ *
+ * <p>If the test class is not annotated or meta-annotated with
+ * {@link RecordApplicationEvents @RecordApplicationEvents}, this listener
+ * effectively does nothing.
+ *
+ * @author Sam Brannen
+ * @since 5.3.3
+ * @see ApplicationEvents
+ * @see ApplicationEventsHolder
+ */
+public class ApplicationEventsTestExecutionListener extends AbstractTestExecutionListener {
+
+	/**
+	 * Attribute name for a {@link TestContext} attribute which indicates
+	 * whether the test class for the given test context is annotated with
+	 * {@link RecordApplicationEvents @RecordApplicationEvents}.
+	 * <p>Permissible values include {@link Boolean#TRUE} and {@link Boolean#FALSE}.
+	 */
+	private static final String RECORD_APPLICATION_EVENTS = Conventions.getQualifiedAttributeName(
+			ApplicationEventsTestExecutionListener.class, "recordApplicationEvents");
+
+	private static final Object applicationEventsMonitor = new Object();
+
+
+	/**
+	 * Returns {@code 1800}.
+	 */
+	@Override
+	public final int getOrder() {
+		return 1800;
+	}
+
+	@Override
+	public void prepareTestInstance(TestContext testContext) throws Exception {
+		if (recordApplicationEvents(testContext)) {
+			registerListenerAndResolvableDependencyIfNecessary(testContext.getApplicationContext());
+			ApplicationEventsHolder.registerApplicationEvents();
+		}
+	}
+
+	@Override
+	public void beforeTestMethod(TestContext testContext) throws Exception {
+		if (recordApplicationEvents(testContext)) {
+			// Register a new ApplicationEvents instance for the current thread
+			// in case the test instance is shared -- for example, in TestNG or
+			// JUnit Jupiter with @TestInstance(PER_CLASS) semantics.
+			ApplicationEventsHolder.registerApplicationEventsIfNecessary();
+		}
+	}
+
+	@Override
+	public void afterTestMethod(TestContext testContext) throws Exception {
+		if (recordApplicationEvents(testContext)) {
+			ApplicationEventsHolder.unregisterApplicationEvents();
+		}
+	}
+
+	private boolean recordApplicationEvents(TestContext testContext) {
+		return testContext.computeAttribute(RECORD_APPLICATION_EVENTS, name ->
+				TestContextAnnotationUtils.hasAnnotation(testContext.getTestClass(), RecordApplicationEvents.class));
+	}
+
+	private void registerListenerAndResolvableDependencyIfNecessary(ApplicationContext applicationContext) {
+		Assert.isInstanceOf(AbstractApplicationContext.class, applicationContext,
+				"The ApplicationContext for the test must be an AbstractApplicationContext");
+		AbstractApplicationContext aac = (AbstractApplicationContext) applicationContext;
+		// Synchronize to avoid race condition in parallel test execution
+		synchronized(applicationEventsMonitor) {
+			boolean notAlreadyRegistered = aac.getApplicationListeners().stream()
+					.map(Object::getClass)
+					.noneMatch(ApplicationEventsApplicationListener.class::equals);
+			if (notAlreadyRegistered) {
+				// Register a new ApplicationEventsApplicationListener.
+				aac.addApplicationListener(new ApplicationEventsApplicationListener());
+
+				// Register ApplicationEvents as a resolvable dependency for @Autowired support in test classes.
+				ConfigurableListableBeanFactory beanFactory = aac.getBeanFactory();
+				beanFactory.registerResolvableDependency(ApplicationEvents.class, new ApplicationEventsObjectFactory());
+			}
+		}
+	}
+
+	/**
+	 * Factory that exposes the current {@link ApplicationEvents} object on demand.
+	 */
+	@SuppressWarnings("serial")
+	private static class ApplicationEventsObjectFactory implements ObjectFactory<ApplicationEvents>, Serializable {
+
+		@Override
+		public ApplicationEvents getObject() {
+			return ApplicationEventsHolder.getRequiredApplicationEvents();
+		}
+
+		@Override
+		public String toString() {
+			return "Current ApplicationEvents";
+		}
+	}
+
+}
@@ -0,0 +1,65 @@
+/*
+ * Copyright 2002-2020 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.test.context.event;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.stream.Stream;
+
+import org.springframework.context.ApplicationEvent;
+import org.springframework.context.PayloadApplicationEvent;
+
+/**
+ * Default implementation of {@link ApplicationEvents}.
+ *
+ * @author Oliver Drotbohm
+ * @author Sam Brannen
+ * @since 5.3.3
+ */
+class DefaultApplicationEvents implements ApplicationEvents {
+
+	private final List<ApplicationEvent> events = new ArrayList<>();
+
+
+	void addEvent(ApplicationEvent event) {
+		this.events.add(event);
+	}
+
+	@Override
+	public Stream<ApplicationEvent> stream() {
+		return this.events.stream();
+	}
+
+	@Override
+	public <T> Stream<T> stream(Class<T> type) {
+		return this.events.stream()
+				.map(this::unwrapPayloadEvent)
+				.filter(type::isInstance)
+				.map(type::cast);
+	}
+
+	@Override
+	public void clear() {
+		this.events.clear();
+	}
+
+	private Object unwrapPayloadEvent(Object source) {
+		return (PayloadApplicationEvent.class.isInstance(source) ?
+				((PayloadApplicationEvent<?>) source).getPayload() : source);
+	}
+
+}
@@ -0,0 +1,49 @@
+/*
+ * Copyright 2002-2020 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.test.context.event;
+
+import java.lang.annotation.Documented;
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Inherited;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+/**
+ * {@code @RecordApplicationEvents} is a class-level annotation that is used to
+ * instruct the <em>Spring TestContext Framework</em> to record all
+ * {@linkplain org.springframework.context.ApplicationEvent application events}
+ * that are published in the {@link org.springframework.context.ApplicationContext
+ * ApplicationContext} during the execution of a single test.
+ *
+ * <p>The recorded events can be accessed via the {@link ApplicationEvents} API
+ * within your tests.
+ *
+ * <p>This annotation may be used as a <em>meta-annotation</em> to create custom
+ * <em>composed annotations</em>.
+ *
+ * @author Sam Brannen
+ * @since 5.3.3
+ * @see ApplicationEvents
+ * @see ApplicationEventsTestExecutionListener
+ */
+@Target(ElementType.TYPE)
+@Retention(RetentionPolicy.RUNTIME)
+@Documented
+@Inherited
+public @interface RecordApplicationEvents {
+}
@@ -52,6 +52,7 @@ import org.springframework.core.annotation.RepeatableContainers;
 import org.springframework.lang.Nullable;
 import org.springframework.test.context.TestConstructor;
 import org.springframework.test.context.TestContextManager;
+import org.springframework.test.context.event.ApplicationEvents;
 import org.springframework.test.context.support.PropertyProvider;
 import org.springframework.test.context.support.TestConstructorUtils;
 import org.springframework.util.Assert;
@@ -218,6 +219,7 @@ public class SpringExtension implements BeforeAllCallback, AfterAllCallback, Tes
 	 * invoked with a fallback {@link PropertyProvider} that delegates its lookup
 	 * to {@link ExtensionContext#getConfigurationParameter(String)}.</li>
 	 * <li>The parameter is of type {@link ApplicationContext} or a sub-type thereof.</li>
+	 * <li>The parameter is of type {@link ApplicationEvents} or a sub-type thereof.</li>
 	 * <li>{@link ParameterResolutionDelegate#isAutowirable} returns {@code true}.</li>
 	 * </ol>
 	 * <p><strong>WARNING</strong>: If a test class {@code Constructor} is annotated
@@ -238,9 +240,19 @@ public class SpringExtension implements BeforeAllCallback, AfterAllCallback, Tes
 				extensionContext.getConfigurationParameter(propertyName).orElse(null);
 		return (TestConstructorUtils.isAutowirableConstructor(executable, testClass, junitPropertyProvider) ||
 				ApplicationContext.class.isAssignableFrom(parameter.getType()) ||
+				supportsApplicationEvents(parameterContext) ||
 				ParameterResolutionDelegate.isAutowirable(parameter, parameterContext.getIndex()));
 	}

+	private boolean supportsApplicationEvents(ParameterContext parameterContext) {
+		if (ApplicationEvents.class.isAssignableFrom(parameterContext.getParameter().getType())) {
+			Assert.isTrue(parameterContext.getDeclaringExecutable() instanceof Method,
+				"ApplicationEvents can only be injected into test and lifecycle methods");
+			return true;
+		}
+		return false;
+	}
+
 	/**
 	 * Resolve a value for the {@link Parameter} in the supplied {@link ParameterContext} by
 	 * retrieving the corresponding dependency from the test's {@link ApplicationContext}.
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2019 the original author or authors.
+ * Copyright 2002-2020 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
@@ -27,6 +27,7 @@ import org.springframework.test.context.ContextConfiguration;
 import org.springframework.test.context.TestContext;
 import org.springframework.test.context.TestContextManager;
 import org.springframework.test.context.TestExecutionListeners;
+import org.springframework.test.context.event.ApplicationEventsTestExecutionListener;
 import org.springframework.test.context.event.EventPublishingTestExecutionListener;
 import org.springframework.test.context.support.DependencyInjectionTestExecutionListener;
 import org.springframework.test.context.support.DirtiesContextBeforeModesTestExecutionListener;
@@ -54,6 +55,7 @@ import org.springframework.test.context.web.ServletTestExecutionListener;
 * <ul>
 * <li>{@link org.springframework.test.context.web.ServletTestExecutionListener}
 * <li>{@link org.springframework.test.context.support.DirtiesContextBeforeModesTestExecutionListener}
+ * <li>{@link org.springframework.test.context.event.ApplicationEventsTestExecutionListener}
 * <li>{@link org.springframework.test.context.support.DependencyInjectionTestExecutionListener}
 * <li>{@link org.springframework.test.context.support.DirtiesContextTestExecutionListener}
 * <li>{@link org.springframework.test.context.event.EventPublishingTestExecutionListener}
@@ -82,6 +84,7 @@ import org.springframework.test.context.web.ServletTestExecutionListener;
 * @see TestExecutionListeners
 * @see ServletTestExecutionListener
 * @see DirtiesContextBeforeModesTestExecutionListener
+ * @see ApplicationEventsTestExecutionListener
 * @see DependencyInjectionTestExecutionListener
 * @see DirtiesContextTestExecutionListener
 * @see EventPublishingTestExecutionListener
@@ -90,8 +93,8 @@ import org.springframework.test.context.web.ServletTestExecutionListener;
 */
@RunWith(SpringRunner.class)
@TestExecutionListeners({ ServletTestExecutionListener.class, DirtiesContextBeforeModesTestExecutionListener.class,
-	DependencyInjectionTestExecutionListener.class, DirtiesContextTestExecutionListener.class,
-	EventPublishingTestExecutionListener.class })
+	ApplicationEventsTestExecutionListener.class, DependencyInjectionTestExecutionListener.class,
+	DirtiesContextTestExecutionListener.class, EventPublishingTestExecutionListener.class })
 public abstract class AbstractJUnit4SpringContextTests implements ApplicationContextAware {

 	/**
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2019 the original author or authors.
+ * Copyright 2002-2020 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
@@ -27,6 +27,7 @@ import org.springframework.jdbc.datasource.init.ResourceDatabasePopulator;
 import org.springframework.lang.Nullable;
 import org.springframework.test.context.ContextConfiguration;
 import org.springframework.test.context.TestExecutionListeners;
+import org.springframework.test.context.event.ApplicationEventsTestExecutionListener;
 import org.springframework.test.context.event.EventPublishingTestExecutionListener;
 import org.springframework.test.context.jdbc.SqlScriptsTestExecutionListener;
 import org.springframework.test.context.support.DependencyInjectionTestExecutionListener;
@@ -62,6 +63,7 @@ import org.springframework.util.Assert;
 * <ul>
 * <li>{@link org.springframework.test.context.web.ServletTestExecutionListener}
 * <li>{@link org.springframework.test.context.support.DirtiesContextBeforeModesTestExecutionListener}
+ * <li>{@link org.springframework.test.context.event.ApplicationEventsTestExecutionListener}</li>
 * <li>{@link org.springframework.test.context.support.DependencyInjectionTestExecutionListener}
 * <li>{@link org.springframework.test.context.support.DirtiesContextTestExecutionListener}
 * <li>{@link org.springframework.test.context.transaction.TransactionalTestExecutionListener}
@@ -100,8 +102,8 @@ import org.springframework.util.Assert;
 * @see org.springframework.test.jdbc.JdbcTestUtils
 * @see org.springframework.test.context.testng.AbstractTransactionalTestNGSpringContextTests
 */
-@TestExecutionListeners(listeners = { ServletTestExecutionListener.class,
-	DirtiesContextBeforeModesTestExecutionListener.class, DependencyInjectionTestExecutionListener.class,
+@TestExecutionListeners(listeners = { ServletTestExecutionListener.class, DirtiesContextBeforeModesTestExecutionListener.class,
+	ApplicationEventsTestExecutionListener.class, DependencyInjectionTestExecutionListener.class,
 	DirtiesContextTestExecutionListener.class, TransactionalTestExecutionListener.class,
 	SqlScriptsTestExecutionListener.class, EventPublishingTestExecutionListener.class }, inheritListeners = false)
@Transactional
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2019 the original author or authors.
+ * Copyright 2002-2020 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
@@ -19,6 +19,7 @@ package org.springframework.test.context.support;
 import java.lang.reflect.Method;
 import java.util.Map;
 import java.util.concurrent.ConcurrentHashMap;
+import java.util.function.Function;

 import org.springframework.context.ApplicationContext;
 import org.springframework.context.ConfigurableApplicationContext;
@@ -200,6 +201,17 @@ public class DefaultTestContext implements TestContext {
 		return this.attributes.get(name);
 	}

+	@Override
+	@SuppressWarnings("unchecked")
+	public <T> T computeAttribute(String name, Function<String, T> computeFunction) {
+		Assert.notNull(name, "Name must not be null");
+		Assert.notNull(computeFunction, "Compute function must not be null");
+		Object value = this.attributes.computeIfAbsent(name, computeFunction);
+		Assert.state(value != null,
+				() -> String.format("Compute function must not return null for attribute named '%s'", name));
+		return (T) value;
+	}
+
 	@Override
 	@Nullable
 	public Object removeAttribute(String name) {
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2019 the original author or authors.
+ * Copyright 2002-2020 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
@@ -36,6 +36,7 @@ import org.springframework.test.context.ContextConfiguration;
 import org.springframework.test.context.TestContext;
 import org.springframework.test.context.TestContextManager;
 import org.springframework.test.context.TestExecutionListeners;
+import org.springframework.test.context.event.ApplicationEventsTestExecutionListener;
 import org.springframework.test.context.event.EventPublishingTestExecutionListener;
 import org.springframework.test.context.support.DependencyInjectionTestExecutionListener;
 import org.springframework.test.context.support.DirtiesContextBeforeModesTestExecutionListener;
@@ -64,6 +65,7 @@ import org.springframework.test.context.web.ServletTestExecutionListener;
 * <ul>
 * <li>{@link org.springframework.test.context.web.ServletTestExecutionListener}
 * <li>{@link org.springframework.test.context.support.DirtiesContextBeforeModesTestExecutionListener}
+ * <li>{@link org.springframework.test.context.event.ApplicationEventsTestExecutionListener}
 * <li>{@link org.springframework.test.context.support.DependencyInjectionTestExecutionListener}
 * <li>{@link org.springframework.test.context.support.DirtiesContextTestExecutionListener}
 * <li>{@link org.springframework.test.context.event.EventPublishingTestExecutionListener}
@@ -78,6 +80,7 @@ import org.springframework.test.context.web.ServletTestExecutionListener;
 * @see TestExecutionListeners
 * @see ServletTestExecutionListener
 * @see DirtiesContextBeforeModesTestExecutionListener
+ * @see ApplicationEventsTestExecutionListener
 * @see DependencyInjectionTestExecutionListener
 * @see DirtiesContextTestExecutionListener
 * @see EventPublishingTestExecutionListener
@@ -85,8 +88,8 @@ import org.springframework.test.context.web.ServletTestExecutionListener;
 * @see org.springframework.test.context.junit4.AbstractJUnit4SpringContextTests
 */
@TestExecutionListeners({ ServletTestExecutionListener.class, DirtiesContextBeforeModesTestExecutionListener.class,
-	DependencyInjectionTestExecutionListener.class, DirtiesContextTestExecutionListener.class,
-	EventPublishingTestExecutionListener.class })
+	ApplicationEventsTestExecutionListener.class, DependencyInjectionTestExecutionListener.class,
+	DirtiesContextTestExecutionListener.class, EventPublishingTestExecutionListener.class })
 public abstract class AbstractTestNGSpringContextTests implements IHookable, ApplicationContextAware {

 	/** Logger available to subclasses. */
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2019 the original author or authors.
+ * Copyright 2002-2020 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
@@ -26,6 +26,7 @@ import org.springframework.jdbc.core.JdbcTemplate;
 import org.springframework.jdbc.datasource.init.ResourceDatabasePopulator;
 import org.springframework.lang.Nullable;
 import org.springframework.test.context.TestExecutionListeners;
+import org.springframework.test.context.event.ApplicationEventsTestExecutionListener;
 import org.springframework.test.context.event.EventPublishingTestExecutionListener;
 import org.springframework.test.context.jdbc.SqlScriptsTestExecutionListener;
 import org.springframework.test.context.support.DependencyInjectionTestExecutionListener;
@@ -61,6 +62,7 @@ import org.springframework.util.Assert;
 * <ul>
 * <li>{@link org.springframework.test.context.web.ServletTestExecutionListener}
 * <li>{@link org.springframework.test.context.support.DirtiesContextBeforeModesTestExecutionListener}
+ * <li>{@link org.springframework.test.context.event.ApplicationEventsTestExecutionListener}</li>
 * <li>{@link org.springframework.test.context.support.DependencyInjectionTestExecutionListener}
 * <li>{@link org.springframework.test.context.support.DirtiesContextTestExecutionListener}
 * <li>{@link org.springframework.test.context.transaction.TransactionalTestExecutionListener}
@@ -84,8 +86,8 @@ import org.springframework.util.Assert;
 * @see org.springframework.test.jdbc.JdbcTestUtils
 * @see org.springframework.test.context.junit4.AbstractTransactionalJUnit4SpringContextTests
 */
-@TestExecutionListeners(listeners = { ServletTestExecutionListener.class,
-	DirtiesContextBeforeModesTestExecutionListener.class, DependencyInjectionTestExecutionListener.class,
+@TestExecutionListeners(listeners = { ServletTestExecutionListener.class, DirtiesContextBeforeModesTestExecutionListener.class,
+	ApplicationEventsTestExecutionListener.class, DependencyInjectionTestExecutionListener.class,
 	DirtiesContextTestExecutionListener.class, TransactionalTestExecutionListener.class,
 	SqlScriptsTestExecutionListener.class, EventPublishingTestExecutionListener.class }, inheritListeners = false)
@Transactional
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2020 the original author or authors.
+ * Copyright 2002-2021 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
@@ -57,6 +57,8 @@ class DefaultWebTestClientBuilder implements WebTestClient.Builder {

 	private static final boolean httpComponentsClientPresent;

+	private static final boolean webFluxPresent;
+
 	static {
 		ClassLoader loader = DefaultWebTestClientBuilder.class.getClassLoader();
 		reactorClientPresent = ClassUtils.isPresent("reactor.netty.http.client.HttpClient", loader);
@@ -64,6 +66,8 @@ class DefaultWebTestClientBuilder implements WebTestClient.Builder {
 		httpComponentsClientPresent =
 				ClassUtils.isPresent("org.apache.hc.client5.http.impl.async.CloseableHttpAsyncClient", loader) &&
 						ClassUtils.isPresent("org.apache.hc.core5.reactive.ReactiveDataConsumer", loader);
+		webFluxPresent = ClassUtils.isPresent(
+				"org.springframework.web.reactive.function.client.ExchangeFunction", loader);
 	}


@@ -119,6 +123,10 @@ class DefaultWebTestClientBuilder implements WebTestClient.Builder {
 		Assert.isTrue(httpHandlerBuilder == null || connector == null,
 				"Expected WebHttpHandlerBuilder or ClientHttpConnector but not both.");

+		// Helpful message especially for MockMvcWebTestClient users
+		Assert.state(webFluxPresent,
+				"To use WebTestClient, please add spring-webflux to the test classpath.");
+
 		this.connector = connector;
 		this.httpHandlerBuilder = (httpHandlerBuilder != null ? httpHandlerBuilder.clone() : null);
 	}
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2020 the original author or authors.
+ * Copyright 2002-2021 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
@@ -24,6 +24,8 @@ import java.util.Arrays;
 import java.util.List;
 import java.util.stream.Collectors;

+import org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogFactory;
 import reactor.core.publisher.Mono;

 import org.springframework.http.HttpHeaders;
@@ -54,6 +56,8 @@ import org.springframework.util.MultiValueMap;
 */
 public class ExchangeResult {

+	private static Log logger = LogFactory.getLog(ExchangeResult.class);
+
 	private static final List<MediaType> PRINTABLE_MEDIA_TYPES = Arrays.asList(
 			MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML,
 			MediaType.parseMediaType("text/*"), MediaType.APPLICATION_FORM_URLENCODED);
@@ -223,7 +227,10 @@ public class ExchangeResult {
 			assertion.run();
 		}
 		catch (AssertionError ex) {
-			throw new AssertionError(ex.getMessage() + "\n" + this, ex);
+			if (logger.isErrorEnabled()) {
+				logger.error("Request details for assertion failure:\n" + this);
+			}
+			throw ex;
 		}
 	}

@@ -35,7 +35,6 @@ import org.springframework.web.context.request.async.CallableProcessingIntercept
 import org.springframework.web.context.request.async.DeferredResult;
 import org.springframework.web.context.request.async.DeferredResultProcessingInterceptor;
 import org.springframework.web.context.request.async.WebAsyncUtils;
-import org.springframework.web.multipart.support.StandardMultipartHttpServletRequest;
 import org.springframework.web.servlet.DispatcherServlet;
 import org.springframework.web.servlet.HandlerExecutionChain;
 import org.springframework.web.servlet.ModelAndView;
@@ -68,10 +67,6 @@ final class TestDispatcherServlet extends DispatcherServlet {
 	protected void service(HttpServletRequest request, HttpServletResponse response)
 			throws ServletException, IOException {

-		if (!request.getParts().isEmpty()) {
-			request = new StandardMultipartHttpServletRequest(request);
-		}
-
 		registerAsyncResultInterceptors(request);

 		super.service(request, response);
@@ -17,7 +17,10 @@
 package org.springframework.test.web.servlet.request;

 import java.io.IOException;
+import java.io.InputStreamReader;
 import java.net.URI;
+import java.nio.charset.Charset;
+import java.nio.charset.StandardCharsets;
 import java.util.ArrayList;
 import java.util.Collection;
 import java.util.List;
@@ -25,17 +28,17 @@ import java.util.List;
 import javax.servlet.ServletContext;
 import javax.servlet.http.Part;

-import org.springframework.http.HttpHeaders;
 import org.springframework.http.HttpMethod;
 import org.springframework.http.MediaType;
 import org.springframework.lang.Nullable;
 import org.springframework.mock.web.MockHttpServletRequest;
 import org.springframework.mock.web.MockMultipartFile;
 import org.springframework.mock.web.MockMultipartHttpServletRequest;
-import org.springframework.mock.web.MockPart;
 import org.springframework.util.Assert;
+import org.springframework.util.FileCopyUtils;
 import org.springframework.util.LinkedMultiValueMap;
 import org.springframework.util.MultiValueMap;
+import org.springframework.web.multipart.MultipartFile;

 /**
 * Default builder for {@link MockMultipartHttpServletRequest}.
@@ -141,26 +144,47 @@ public class MockMultipartHttpServletRequestBuilder extends MockHttpServletReque
 	@Override
 	protected final MockHttpServletRequest createServletRequest(ServletContext servletContext) {
 		MockMultipartHttpServletRequest request = new MockMultipartHttpServletRequest(servletContext);
-		this.files.forEach(file -> request.addPart(toMockPart(file)));
-		this.parts.values().stream().flatMap(Collection::stream).forEach(request::addPart);
+		this.files.forEach(request::addFile);
+		this.parts.values().stream().flatMap(Collection::stream).forEach(part -> {
+			request.addPart(part);
+			try {
+				MultipartFile file = asMultipartFile(part);
+				if (file != null) {
+					request.addFile(file);
+					return;
+				}
+				String value = toParameterValue(part);
+				if (value != null) {
+					request.addParameter(part.getName(), toParameterValue(part));
+				}
+			}
+			catch (IOException ex) {
+				throw new IllegalStateException("Failed to read content for part " + part.getName(), ex);
+			}
+		});
 		return request;
 	}

-	private MockPart toMockPart(MockMultipartFile file) {
-		byte[] bytes = null;
-		if (!file.isEmpty()) {
-			try {
-				bytes = file.getBytes();
-			}
-			catch (IOException ex) {
-				throw new IllegalStateException("Unexpected IOException", ex);
-			}
+	@Nullable
+	private MultipartFile asMultipartFile(Part part) throws IOException {
+		String name = part.getName();
+		String filename = part.getSubmittedFileName();
+		if (filename != null) {
+			return new MockMultipartFile(name, filename, part.getContentType(), part.getInputStream());
 		}
-		MockPart part = new MockPart(file.getName(), file.getOriginalFilename(), bytes);
-		if (file.getContentType() != null) {
-			part.getHeaders().set(HttpHeaders.CONTENT_TYPE, file.getContentType());
+		return null;
+	}
+
+	@Nullable
+	private String toParameterValue(Part part) throws IOException {
+		String rawType = part.getContentType();
+		MediaType mediaType = (rawType != null ? MediaType.parseMediaType(rawType) : MediaType.TEXT_PLAIN);
+		if (!mediaType.isCompatibleWith(MediaType.TEXT_PLAIN)) {
+			return null;
 		}
-		return part;
+		Charset charset = (mediaType.getCharset() != null ? mediaType.getCharset() : StandardCharsets.UTF_8);
+		InputStreamReader reader = new InputStreamReader(part.getInputStream(), charset);
+		return FileCopyUtils.copyToString(reader);
 	}

 }
@@ -3,6 +3,7 @@
 org.springframework.test.context.TestExecutionListener = \
 	org.springframework.test.context.web.ServletTestExecutionListener,\
 	org.springframework.test.context.support.DirtiesContextBeforeModesTestExecutionListener,\
+	org.springframework.test.context.event.ApplicationEventsTestExecutionListener,\
 	org.springframework.test.context.support.DependencyInjectionTestExecutionListener,\
 	org.springframework.test.context.support.DirtiesContextTestExecutionListener,\
 	org.springframework.test.context.transaction.TransactionalTestExecutionListener,\
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2019 the original author or authors.
+ * Copyright 2002-2020 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
@@ -24,6 +24,7 @@ import org.junit.jupiter.api.Test;

 import org.springframework.core.Ordered;
 import org.springframework.core.annotation.AnnotationConfigurationException;
+import org.springframework.test.context.event.ApplicationEventsTestExecutionListener;
 import org.springframework.test.context.event.EventPublishingTestExecutionListener;
 import org.springframework.test.context.jdbc.SqlScriptsTestExecutionListener;
 import org.springframework.test.context.support.AbstractTestExecutionListener;
@@ -56,10 +57,15 @@ class TestExecutionListenersTests {

 	@Test
 	void defaultListeners() {
-		List<Class<?>> expected = asList(ServletTestExecutionListener.class,
-				DirtiesContextBeforeModesTestExecutionListener.class, DependencyInjectionTestExecutionListener.class,
-				DirtiesContextTestExecutionListener.class, TransactionalTestExecutionListener.class,
-				SqlScriptsTestExecutionListener.class, EventPublishingTestExecutionListener.class);
+		List<Class<?>> expected = asList(ServletTestExecutionListener.class,//
+				DirtiesContextBeforeModesTestExecutionListener.class,//
+				ApplicationEventsTestExecutionListener.class,//
+				DependencyInjectionTestExecutionListener.class,//
+				DirtiesContextTestExecutionListener.class,//
+				TransactionalTestExecutionListener.class,//
+				SqlScriptsTestExecutionListener.class,//
+				EventPublishingTestExecutionListener.class
+			);
 		assertRegisteredListeners(DefaultListenersTestCase.class, expected);
 	}

@@ -68,10 +74,16 @@ class TestExecutionListenersTests {
 	 */
 	@Test
 	void defaultListenersMergedWithCustomListenerPrepended() {
-		List<Class<?>> expected = asList(QuuxTestExecutionListener.class, ServletTestExecutionListener.class,
-				DirtiesContextBeforeModesTestExecutionListener.class, DependencyInjectionTestExecutionListener.class,
-				DirtiesContextTestExecutionListener.class, TransactionalTestExecutionListener.class,
-				SqlScriptsTestExecutionListener.class, EventPublishingTestExecutionListener.class);
+		List<Class<?>> expected = asList(QuuxTestExecutionListener.class,//
+				ServletTestExecutionListener.class,//
+				DirtiesContextBeforeModesTestExecutionListener.class,//
+				ApplicationEventsTestExecutionListener.class,//
+				DependencyInjectionTestExecutionListener.class,//
+				DirtiesContextTestExecutionListener.class,//
+				TransactionalTestExecutionListener.class,//
+				SqlScriptsTestExecutionListener.class,//
+				EventPublishingTestExecutionListener.class
+			);
 		assertRegisteredListeners(MergedDefaultListenersWithCustomListenerPrependedTestCase.class, expected);
 	}

@@ -80,11 +92,16 @@ class TestExecutionListenersTests {
 	 */
 	@Test
 	void defaultListenersMergedWithCustomListenerAppended() {
-		List<Class<?>> expected = asList(ServletTestExecutionListener.class,
-				DirtiesContextBeforeModesTestExecutionListener.class, DependencyInjectionTestExecutionListener.class,
-				DirtiesContextTestExecutionListener.class, TransactionalTestExecutionListener.class,
-				SqlScriptsTestExecutionListener.class, EventPublishingTestExecutionListener.class,
-				BazTestExecutionListener.class);
+		List<Class<?>> expected = asList(ServletTestExecutionListener.class,//
+				DirtiesContextBeforeModesTestExecutionListener.class,//
+				ApplicationEventsTestExecutionListener.class,//
+				DependencyInjectionTestExecutionListener.class,//
+				DirtiesContextTestExecutionListener.class,//
+				TransactionalTestExecutionListener.class,
+				SqlScriptsTestExecutionListener.class,//
+				EventPublishingTestExecutionListener.class,//
+				BazTestExecutionListener.class
+			);
 		assertRegisteredListeners(MergedDefaultListenersWithCustomListenerAppendedTestCase.class, expected);
 	}

@@ -93,11 +110,16 @@ class TestExecutionListenersTests {
 	 */
 	@Test
 	void defaultListenersMergedWithCustomListenerInserted() {
-		List<Class<?>> expected = asList(ServletTestExecutionListener.class,
-				DirtiesContextBeforeModesTestExecutionListener.class, DependencyInjectionTestExecutionListener.class,
-				BarTestExecutionListener.class, DirtiesContextTestExecutionListener.class,
-				TransactionalTestExecutionListener.class, SqlScriptsTestExecutionListener.class,
-				EventPublishingTestExecutionListener.class);
+		List<Class<?>> expected = asList(ServletTestExecutionListener.class,//
+				DirtiesContextBeforeModesTestExecutionListener.class,//
+				ApplicationEventsTestExecutionListener.class,//
+				DependencyInjectionTestExecutionListener.class,//
+				BarTestExecutionListener.class,//
+				DirtiesContextTestExecutionListener.class,//
+				TransactionalTestExecutionListener.class,//
+				SqlScriptsTestExecutionListener.class,//
+				EventPublishingTestExecutionListener.class
+			);
 		assertRegisteredListeners(MergedDefaultListenersWithCustomListenerInsertedTestCase.class, expected);
 	}

@@ -0,0 +1,91 @@
+/*
+ * Copyright 2002-2020 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.test.context.junit.jupiter.event;
+
+import java.util.Iterator;
+import java.util.List;
+import java.util.function.Function;
+import java.util.function.Predicate;
+import java.util.stream.Collectors;
+import java.util.stream.Stream;
+
+import org.springframework.test.context.event.ApplicationEventsHolder;
+
+/**
+ * Default implementation of {@link PublishedEvents}.
+ *
+ * <p>Copied from the Moduliths project.
+ *
+ * @author Oliver Drotbohm
+ * @author Sam Brannen
+ * @since 5.3.3
+ */
+class DefaultPublishedEvents implements PublishedEvents {
+
+	@Override
+	public <T> TypedPublishedEvents<T> ofType(Class<T> type) {
+		return SimpleTypedPublishedEvents.of(ApplicationEventsHolder.getRequiredApplicationEvents().stream(type));
+	}
+
+
+	private static class SimpleTypedPublishedEvents<T> implements TypedPublishedEvents<T> {
+
+		private final List<T> events;
+
+		private SimpleTypedPublishedEvents(List<T> events) {
+			this.events = events;
+		}
+
+		static <T> SimpleTypedPublishedEvents<T> of(Stream<T> stream) {
+			return new SimpleTypedPublishedEvents<>(stream.collect(Collectors.toList()));
+		}
+
+		@Override
+		public <S extends T> TypedPublishedEvents<S> ofSubType(Class<S> subType) {
+			return SimpleTypedPublishedEvents.of(getFilteredEvents(subType::isInstance)//
+					.map(subType::cast));
+		}
+
+		@Override
+		public TypedPublishedEvents<T> matching(Predicate<? super T> predicate) {
+			return SimpleTypedPublishedEvents.of(getFilteredEvents(predicate));
+		}
+
+		@Override
+		public <S> TypedPublishedEvents<T> matchingMapped(Function<T, S> mapper, Predicate<? super S> predicate) {
+			return SimpleTypedPublishedEvents.of(this.events.stream().flatMap(it -> {
+				S mapped = mapper.apply(it);
+				return predicate.test(mapped) ? Stream.of(it) : Stream.empty();
+			}));
+		}
+
+		private Stream<T> getFilteredEvents(Predicate<? super T> predicate) {
+			return this.events.stream().filter(predicate);
+		}
+
+		@Override
+		public Iterator<T> iterator() {
+			return this.events.iterator();
+		}
+
+		@Override
+		public String toString() {
+			return this.events.toString();
+		}
+	}
+
+}
@@ -0,0 +1,275 @@
+/*
+ * Copyright 2002-2020 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.test.context.junit.jupiter.event;
+
+import java.util.stream.Stream;
+
+import org.junit.jupiter.api.AfterEach;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Nested;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.TestInfo;
+import org.junit.jupiter.api.TestInstance;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.context.ApplicationContext;
+import org.springframework.context.ApplicationEvent;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.test.context.event.ApplicationEvents;
+import org.springframework.test.context.event.RecordApplicationEvents;
+import org.springframework.test.context.junit.jupiter.SpringJUnitConfig;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.junit.jupiter.api.TestInstance.Lifecycle.PER_CLASS;
+import static org.junit.jupiter.api.TestInstance.Lifecycle.PER_METHOD;
+
+/**
+ * Integration tests for {@link ApplicationEvents} in conjunction with JUnit Jupiter.
+ *
+ * @author Sam Brannen
+ * @since 5.3.3
+ */
+@SpringJUnitConfig
+@RecordApplicationEvents
+class JUnitJupiterApplicationEventsIntegrationTests {
+
+	@Autowired
+	ApplicationContext context;
+
+	@Autowired
+	ApplicationEvents applicationEvents;
+
+
+	@Nested
+	@TestInstance(PER_METHOD)
+	class TestInstancePerMethodTests {
+
+		@BeforeEach
+		void beforeEach() {
+			assertEventTypes(applicationEvents, "PrepareTestInstanceEvent", "BeforeTestMethodEvent");
+			context.publishEvent(new CustomEvent("beforeEach"));
+			assertCustomEvents(applicationEvents, "beforeEach");
+			assertEventTypes(applicationEvents, "PrepareTestInstanceEvent", "BeforeTestMethodEvent", "CustomEvent");
+		}
+
+		@Test
+		void test1(ApplicationEvents events, TestInfo testInfo) {
+			assertTestExpectations(events, testInfo);
+		}
+
+		@Test
+		void test2(@Autowired ApplicationEvents events, TestInfo testInfo) {
+			assertTestExpectations(events, testInfo);
+		}
+
+		private void assertTestExpectations(ApplicationEvents events, TestInfo testInfo) {
+			String testName = testInfo.getTestMethod().get().getName();
+
+			assertEventTypes(events, "PrepareTestInstanceEvent", "BeforeTestMethodEvent", "CustomEvent",
+					"BeforeTestExecutionEvent");
+			context.publishEvent(new CustomEvent(testName));
+			context.publishEvent("payload1");
+			context.publishEvent("payload2");
+			assertCustomEvents(events, "beforeEach", testName);
+			assertPayloads(events.stream(String.class), "payload1", "payload2");
+		}
+
+		@AfterEach
+		void afterEach(@Autowired ApplicationEvents events, TestInfo testInfo) {
+			String testName = testInfo.getTestMethod().get().getName();
+
+			assertEventTypes(events, "PrepareTestInstanceEvent", "BeforeTestMethodEvent", "CustomEvent",
+					"BeforeTestExecutionEvent", "CustomEvent", "PayloadApplicationEvent", "PayloadApplicationEvent",
+					"AfterTestExecutionEvent");
+			context.publishEvent(new CustomEvent("afterEach"));
+			assertCustomEvents(events, "beforeEach", testName, "afterEach");
+			assertEventTypes(events, "PrepareTestInstanceEvent", "BeforeTestMethodEvent", "CustomEvent",
+					"BeforeTestExecutionEvent", "CustomEvent", "PayloadApplicationEvent", "PayloadApplicationEvent",
+					"AfterTestExecutionEvent", "CustomEvent");
+		}
+	}
+
+	@Nested
+	@TestInstance(PER_METHOD)
+	class TestInstancePerMethodWithClearedEventsTests {
+
+		@BeforeEach
+		void beforeEach() {
+			assertEventTypes(applicationEvents, "PrepareTestInstanceEvent", "BeforeTestMethodEvent");
+			context.publishEvent(new CustomEvent("beforeEach"));
+			assertCustomEvents(applicationEvents, "beforeEach");
+			assertEventTypes(applicationEvents, "PrepareTestInstanceEvent", "BeforeTestMethodEvent", "CustomEvent");
+			applicationEvents.clear();
+			assertThat(applicationEvents.stream()).isEmpty();
+		}
+
+		@Test
+		void test1(ApplicationEvents events, TestInfo testInfo) {
+			assertTestExpectations(events, testInfo);
+		}
+
+		@Test
+		void test2(@Autowired ApplicationEvents events, TestInfo testInfo) {
+			assertTestExpectations(events, testInfo);
+		}
+
+		private void assertTestExpectations(ApplicationEvents events, TestInfo testInfo) {
+			String testName = testInfo.getTestMethod().get().getName();
+
+			assertEventTypes(events, "BeforeTestExecutionEvent");
+			context.publishEvent(new CustomEvent(testName));
+			assertCustomEvents(events, testName);
+			assertEventTypes(events, "BeforeTestExecutionEvent", "CustomEvent");
+		}
+
+		@AfterEach
+		void afterEach(@Autowired ApplicationEvents events, TestInfo testInfo) {
+			events.clear();
+			context.publishEvent(new CustomEvent("afterEach"));
+			assertCustomEvents(events, "afterEach");
+			assertEventTypes(events, "CustomEvent");
+		}
+	}
+
+	@Nested
+	@TestInstance(PER_CLASS)
+	class TestInstancePerClassTests {
+
+		private boolean testAlreadyExecuted = false;
+
+		@BeforeEach
+		void beforeEach(TestInfo testInfo) {
+			if (!testAlreadyExecuted) {
+				assertEventTypes(applicationEvents, "PrepareTestInstanceEvent", "BeforeTestClassEvent",
+						"BeforeTestMethodEvent");
+			}
+			else {
+				assertEventTypes(applicationEvents, "BeforeTestMethodEvent");
+			}
+
+			context.publishEvent(new CustomEvent("beforeEach"));
+			assertCustomEvents(applicationEvents, "beforeEach");
+
+			if (!testAlreadyExecuted) {
+				assertEventTypes(applicationEvents, "PrepareTestInstanceEvent", "BeforeTestClassEvent",
+						"BeforeTestMethodEvent", "CustomEvent");
+			}
+			else {
+				assertEventTypes(applicationEvents, "BeforeTestMethodEvent", "CustomEvent");
+			}
+		}
+
+		@Test
+		void test1(ApplicationEvents events, TestInfo testInfo) {
+			assertTestExpectations(events, testInfo);
+		}
+
+		@Test
+		void test2(@Autowired ApplicationEvents events, TestInfo testInfo) {
+			assertTestExpectations(events, testInfo);
+		}
+
+		private void assertTestExpectations(ApplicationEvents events, TestInfo testInfo) {
+			String testName = testInfo.getTestMethod().get().getName();
+
+			if (!testAlreadyExecuted) {
+				assertEventTypes(applicationEvents, "PrepareTestInstanceEvent", "BeforeTestClassEvent",
+						"BeforeTestMethodEvent", "CustomEvent", "BeforeTestExecutionEvent");
+			}
+			else {
+				assertEventTypes(applicationEvents, "BeforeTestMethodEvent", "CustomEvent", "BeforeTestExecutionEvent");
+			}
+
+			context.publishEvent(new CustomEvent(testName));
+			assertCustomEvents(events, "beforeEach", testName);
+
+			if (!testAlreadyExecuted) {
+				assertEventTypes(applicationEvents, "PrepareTestInstanceEvent", "BeforeTestClassEvent",
+						"BeforeTestMethodEvent", "CustomEvent", "BeforeTestExecutionEvent", "CustomEvent");
+			}
+			else {
+				assertEventTypes(applicationEvents, "BeforeTestMethodEvent", "CustomEvent", "BeforeTestExecutionEvent",
+						"CustomEvent");
+			}
+		}
+
+		@AfterEach
+		void afterEach(@Autowired ApplicationEvents events, TestInfo testInfo) {
+			String testName = testInfo.getTestMethod().get().getName();
+
+			if (!testAlreadyExecuted) {
+				assertEventTypes(applicationEvents, "PrepareTestInstanceEvent", "BeforeTestClassEvent",
+						"BeforeTestMethodEvent", "CustomEvent", "BeforeTestExecutionEvent", "CustomEvent",
+						"AfterTestExecutionEvent");
+			}
+			else {
+				assertEventTypes(applicationEvents, "BeforeTestMethodEvent", "CustomEvent", "BeforeTestExecutionEvent",
+						"CustomEvent", "AfterTestExecutionEvent");
+			}
+
+			context.publishEvent(new CustomEvent("afterEach"));
+			assertCustomEvents(events, "beforeEach", testName, "afterEach");
+
+			if (!testAlreadyExecuted) {
+				assertEventTypes(applicationEvents, "PrepareTestInstanceEvent", "BeforeTestClassEvent",
+						"BeforeTestMethodEvent", "CustomEvent", "BeforeTestExecutionEvent", "CustomEvent",
+						"AfterTestExecutionEvent", "CustomEvent");
+				testAlreadyExecuted = true;
+			}
+			else {
+				assertEventTypes(applicationEvents, "BeforeTestMethodEvent", "CustomEvent", "BeforeTestExecutionEvent",
+						"CustomEvent", "AfterTestExecutionEvent", "CustomEvent");
+			}
+		}
+	}
+
+
+	private static void assertEventTypes(ApplicationEvents applicationEvents, String... types) {
+		assertThat(applicationEvents.stream().map(event -> event.getClass().getSimpleName()))
+			.containsExactly(types);
+	}
+
+	private static void assertPayloads(Stream<String> events, String... values) {
+		assertThat(events).extracting(Object::toString).containsExactly(values);
+	}
+
+	private static void assertCustomEvents(ApplicationEvents events, String... messages) {
+		assertThat(events.stream(CustomEvent.class)).extracting(CustomEvent::getMessage).containsExactly(messages);
+	}
+
+
+	@Configuration
+	static class Config {
+	}
+
+	@SuppressWarnings("serial")
+	static class CustomEvent extends ApplicationEvent {
+
+		private final String message;
+
+
+		CustomEvent(String message) {
+			super(message);
+			this.message = message;
+		}
+
+		String getMessage() {
+			return message;
+		}
+	}
+
+}
@@ -0,0 +1,174 @@
+/*
+ * Copyright 2002-2020 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.test.context.junit.jupiter.event;
+
+import java.util.Set;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.stream.Collectors;
+import java.util.stream.Stream;
+
+import org.junit.jupiter.api.AfterEach;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.TestInfo;
+import org.junit.jupiter.api.TestInstance;
+import org.junit.jupiter.api.TestInstance.Lifecycle;
+import org.junit.jupiter.api.parallel.Execution;
+import org.junit.jupiter.api.parallel.ExecutionMode;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.ValueSource;
+import org.junit.platform.testkit.engine.EngineTestKit;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.context.ApplicationContext;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.test.context.event.ApplicationEvents;
+import org.springframework.test.context.event.RecordApplicationEvents;
+import org.springframework.test.context.junit.jupiter.SpringJUnitConfig;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.junit.platform.engine.discovery.DiscoverySelectors.selectClass;
+
+/**
+ * Integration tests that verify parallel execution support for {@link ApplicationEvents}
+ * in conjunction with JUnit Jupiter.
+ *
+ * @author Sam Brannen
+ * @since 5.3.3
+ */
+class ParallelApplicationEventsIntegrationTests {
+
+	private static final Set<String> payloads = ConcurrentHashMap.newKeySet();
+
+
+	@ParameterizedTest
+	@ValueSource(classes = {TestInstancePerMethodTestCase.class, TestInstancePerClassTestCase.class})
+	void executeTestsInParallel(Class<?> testClass) {
+		EngineTestKit.engine("junit-jupiter")//
+				.selectors(selectClass(testClass))//
+				.configurationParameter("junit.jupiter.execution.parallel.enabled", "true")//
+				.configurationParameter("junit.jupiter.execution.parallel.config.dynamic.factor", "10")//
+				.execute()//
+				.testEvents()//
+				.assertStatistics(stats -> stats.started(10).succeeded(10).failed(0));
+
+		Set<String> testNames = payloads.stream()//
+				.map(payload -> payload.substring(0, payload.indexOf("-")))//
+				.collect(Collectors.toSet());
+		Set<String> threadNames = payloads.stream()//
+				.map(payload -> payload.substring(payload.indexOf("-")))//
+				.collect(Collectors.toSet());
+
+		assertThat(payloads).hasSize(10);
+		assertThat(testNames).hasSize(10);
+		// There are probably 10 different thread names on a developer's machine,
+		// but we really just want to assert that at least two different threads
+		// were used, since the CI server seems to have fewer threads available.
+		assertThat(threadNames).hasSizeGreaterThanOrEqualTo(2);
+	}
+
+
+	@AfterEach
+	void resetPayloads() {
+		payloads.clear();
+	}
+
+
+	@SpringJUnitConfig
+	@RecordApplicationEvents
+	@Execution(ExecutionMode.CONCURRENT)
+	@TestInstance(Lifecycle.PER_METHOD)
+	static class TestInstancePerMethodTestCase {
+
+		@Autowired
+		ApplicationContext context;
+
+		@Autowired
+		ApplicationEvents events;
+
+		@Test
+		void test1(TestInfo testInfo) {
+			assertTestExpectations(this.events, testInfo);
+		}
+
+		@Test
+		void test2(ApplicationEvents events, TestInfo testInfo) {
+			assertTestExpectations(events, testInfo);
+		}
+
+		@Test
+		void test3(TestInfo testInfo) {
+			assertTestExpectations(this.events, testInfo);
+		}
+
+		@Test
+		void test4(ApplicationEvents events, TestInfo testInfo) {
+			assertTestExpectations(events, testInfo);
+		}
+
+		@Test
+		void test5(TestInfo testInfo) {
+			assertTestExpectations(this.events, testInfo);
+		}
+
+		@Test
+		void test6(ApplicationEvents events, TestInfo testInfo) {
+			assertTestExpectations(events, testInfo);
+		}
+
+		@Test
+		void test7(TestInfo testInfo) {
+			assertTestExpectations(this.events, testInfo);
+		}
+
+		@Test
+		void test8(ApplicationEvents events, TestInfo testInfo) {
+			assertTestExpectations(events, testInfo);
+		}
+
+		@Test
+		void test9(TestInfo testInfo) {
+			assertTestExpectations(this.events, testInfo);
+		}
+
+		@Test
+		void test10(ApplicationEvents events, TestInfo testInfo) {
+			assertTestExpectations(events, testInfo);
+		}
+
+		private void assertTestExpectations(ApplicationEvents events, TestInfo testInfo) {
+			String testName = testInfo.getTestMethod().get().getName();
+			String threadName = Thread.currentThread().getName();
+			String localPayload = testName + "-" + threadName;
+			context.publishEvent(localPayload);
+			assertPayloads(events.stream(String.class), localPayload);
+		}
+
+		private static void assertPayloads(Stream<String> events, String... values) {
+			assertThat(events.peek(payloads::add)).extracting(Object::toString).containsExactly(values);
+		}
+
+		@Configuration
+		static class Config {
+		}
+
+	}
+
+	@TestInstance(Lifecycle.PER_CLASS)
+	static class TestInstancePerClassTestCase extends TestInstancePerMethodTestCase {
+	}
+
+}
@@ -0,0 +1,87 @@
+/*
+ * Copyright 2002-2020 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.test.context.junit.jupiter.event;
+
+import java.util.Arrays;
+import java.util.function.Function;
+import java.util.function.Predicate;
+
+/**
+ * All Spring application events fired during the test execution.
+ *
+ * <p>Copied from the Moduliths project.
+ *
+ * @author Oliver Drotbohm
+ * @since 5.3.3
+ */
+public interface PublishedEvents {
+
+	/**
+	 * Creates a new {@link PublishedEvents} instance for the given events.
+	 *
+	 * @param events must not be {@literal null}
+	 * @return will never be {@literal null}
+	 */
+	public static PublishedEvents of(Object... events) {
+		return of(Arrays.asList(events));
+	}
+
+	/**
+	 * Returns all application events of the given type that were fired during the test execution.
+	 *
+	 * @param <T> the event type
+	 * @param type must not be {@literal null}
+	 */
+	<T> TypedPublishedEvents<T> ofType(Class<T> type);
+
+	/**
+	 * All application events of a given type that were fired during a test execution.
+	 *
+	 * @param <T> the event type
+	 */
+	interface TypedPublishedEvents<T> extends Iterable<T> {
+
+		/**
+		 * Further constrain the event type for downstream assertions.
+		 *
+		 * @param subType the sub type
+		 * @return will never be {@literal null}
+		 */
+		<S extends T> TypedPublishedEvents<S> ofSubType(Class<S> subType);
+
+		/**
+		 * Returns all {@link TypedPublishedEvents} that match the given predicate.
+		 *
+		 * @param predicate must not be {@literal null}
+		 * @return will never be {@literal null}
+		 */
+		TypedPublishedEvents<T> matching(Predicate<? super T> predicate);
+
+		/**
+		 * Returns all {@link TypedPublishedEvents} that match the given predicate
+		 * after applying the given mapping step.
+		 *
+		 * @param <S> the intermediate type to apply the {@link Predicate} on
+		 * @param mapper the mapping step to extract a part of the original event
+		 * subject to test for the {@link Predicate}
+		 * @param predicate the {@link Predicate} to apply on the value extracted
+		 * @return will never be {@literal null}
+		 */
+		<S> TypedPublishedEvents<T> matchingMapped(Function<T, S> mapper, Predicate<? super S> predicate);
+	}
+
+}
@@ -0,0 +1,39 @@
+/*
+ * Copyright 2002-2020 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.test.context.junit.jupiter.event;
+
+import org.junit.jupiter.api.extension.ExtensionContext;
+import org.junit.jupiter.api.extension.ParameterContext;
+import org.junit.jupiter.api.extension.ParameterResolver;
+
+/**
+ * @author Sam Brannen
+ * @since 5.3.3
+ */
+public class PublishedEventsExtension implements ParameterResolver {
+
+	@Override
+	public boolean supportsParameter(ParameterContext parameterContext, ExtensionContext extensionContext) {
+		return PublishedEvents.class.isAssignableFrom(parameterContext.getParameter().getType());
+	}
+
+	@Override
+	public PublishedEvents resolveParameter(ParameterContext parameterContext, ExtensionContext extensionContext) {
+		return new DefaultPublishedEvents();
+	}
+
+}
@@ -0,0 +1,60 @@
+/*
+ * Copyright 2002-2020 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.test.context.junit.jupiter.event;
+
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+
+import org.springframework.context.annotation.Configuration;
+import org.springframework.test.context.event.ApplicationEvents;
+import org.springframework.test.context.event.BeforeTestExecutionEvent;
+import org.springframework.test.context.event.BeforeTestMethodEvent;
+import org.springframework.test.context.event.PrepareTestInstanceEvent;
+import org.springframework.test.context.event.RecordApplicationEvents;
+import org.springframework.test.context.event.TestContextEvent;
+import org.springframework.test.context.junit.jupiter.SpringJUnitConfig;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+/**
+ * Integration tests for the example {@link PublishedEvents} extension to the
+ * {@link ApplicationEvents} feature.
+ *
+ * @author Sam Brannen
+ * @since 5.3.3
+ */
+@SpringJUnitConfig
+@RecordApplicationEvents
+@ExtendWith(PublishedEventsExtension.class)
+class PublishedEventsIntegrationTests {
+
+	@Test
+	void test(PublishedEvents publishedEvents) {
+		assertThat(publishedEvents).isNotNull();
+		assertThat(publishedEvents.ofType(TestContextEvent.class)).hasSize(3);
+		assertThat(publishedEvents.ofType(PrepareTestInstanceEvent.class)).hasSize(1);
+		assertThat(publishedEvents.ofType(BeforeTestMethodEvent.class)).hasSize(1);
+		assertThat(publishedEvents.ofType(BeforeTestExecutionEvent.class)).hasSize(1);
+		assertThat(publishedEvents.ofType(TestContextEvent.class).ofSubType(BeforeTestExecutionEvent.class)).hasSize(1);
+	}
+
+
+	@Configuration
+	static class Config {
+	}
+
+}
@@ -0,0 +1,123 @@
+/*
+ * Copyright 2002-2020 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.test.context.junit4.event;
+
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Rule;
+import org.junit.Test;
+import org.junit.rules.TestName;
+import org.junit.runner.RunWith;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.context.ApplicationContext;
+import org.springframework.context.ApplicationEvent;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.test.context.event.ApplicationEvents;
+import org.springframework.test.context.event.RecordApplicationEvents;
+import org.springframework.test.context.junit4.SpringRunner;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+/**
+ * Integration tests for {@link ApplicationEvents} in conjunction with JUnit 4.
+ *
+ * @author Sam Brannen
+ * @since 5.3.3
+ */
+@RunWith(SpringRunner.class)
+@RecordApplicationEvents
+public class JUnit4ApplicationEventsIntegrationTests {
+
+	@Rule
+	public final TestName testName = new TestName();
+
+	@Autowired
+	ApplicationContext context;
+
+	@Autowired
+	ApplicationEvents applicationEvents;
+
+
+	@Before
+	public void beforeEach() {
+		assertEventTypes(applicationEvents, "PrepareTestInstanceEvent", "BeforeTestMethodEvent");
+		context.publishEvent(new CustomEvent("beforeEach"));
+		assertThat(applicationEvents.stream(CustomEvent.class)).extracting(CustomEvent::getMessage)//
+				.containsExactly("beforeEach");
+		assertEventTypes(applicationEvents, "PrepareTestInstanceEvent", "BeforeTestMethodEvent", "CustomEvent");
+	}
+
+	@Test
+	public void test1() {
+		assertTestExpectations("test1");
+	}
+
+	@Test
+	public void test2() {
+		assertTestExpectations("test2");
+	}
+
+	private void assertTestExpectations(String testName) {
+		assertEventTypes(applicationEvents, "PrepareTestInstanceEvent", "BeforeTestMethodEvent", "CustomEvent",
+				"BeforeTestExecutionEvent");
+		context.publishEvent(new CustomEvent(testName));
+		assertThat(applicationEvents.stream(CustomEvent.class)).extracting(CustomEvent::getMessage)//
+				.containsExactly("beforeEach", testName);
+		assertEventTypes(applicationEvents, "PrepareTestInstanceEvent", "BeforeTestMethodEvent", "CustomEvent",
+				"BeforeTestExecutionEvent", "CustomEvent");
+	}
+
+	@After
+	public void afterEach() {
+		assertEventTypes(applicationEvents, "PrepareTestInstanceEvent", "BeforeTestMethodEvent", "CustomEvent",
+			"BeforeTestExecutionEvent", "CustomEvent", "AfterTestExecutionEvent");
+		context.publishEvent(new CustomEvent("afterEach"));
+		assertThat(applicationEvents.stream(CustomEvent.class)).extracting(CustomEvent::getMessage)//
+				.containsExactly("beforeEach", this.testName.getMethodName(), "afterEach");
+		assertEventTypes(applicationEvents, "PrepareTestInstanceEvent", "BeforeTestMethodEvent", "CustomEvent",
+			"BeforeTestExecutionEvent", "CustomEvent", "AfterTestExecutionEvent", "CustomEvent");
+	}
+
+
+	private static void assertEventTypes(ApplicationEvents applicationEvents, String... types) {
+		assertThat(applicationEvents.stream().map(event -> event.getClass().getSimpleName()))
+			.containsExactly(types);
+	}
+
+
+	@Configuration
+	static class Config {
+	}
+
+	@SuppressWarnings("serial")
+	static class CustomEvent extends ApplicationEvent {
+
+		private final String message;
+
+
+		CustomEvent(String message) {
+			super(message);
+			this.message = message;
+		}
+
+		String getMessage() {
+			return message;
+		}
+	}
+
+}
@@ -0,0 +1,160 @@
+/*
+ * Copyright 2002-2020 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.test.context.testng.event;
+
+import java.lang.reflect.Method;
+
+import org.testng.annotations.AfterMethod;
+import org.testng.annotations.BeforeMethod;
+import org.testng.annotations.Test;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.context.ApplicationContext;
+import org.springframework.context.ApplicationEvent;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.test.context.event.ApplicationEvents;
+import org.springframework.test.context.event.RecordApplicationEvents;
+import org.springframework.test.context.testng.AbstractTestNGSpringContextTests;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+/**
+ * Integration tests for {@link ApplicationEvents} in conjunction with TestNG.
+ *
+ * @author Sam Brannen
+ * @since 5.3.3
+ */
+@RecordApplicationEvents
+class TestNGApplicationEventsIntegrationTests extends AbstractTestNGSpringContextTests {
+
+	@Autowired
+	ApplicationContext context;
+
+	@Autowired
+	ApplicationEvents applicationEvents;
+
+	private boolean testAlreadyExecuted = false;
+
+
+	@BeforeMethod
+	void beforeEach() {
+		if (!testAlreadyExecuted) {
+			assertEventTypes(applicationEvents, "PrepareTestInstanceEvent", "BeforeTestMethodEvent");
+		}
+		else {
+			assertEventTypes(applicationEvents, "BeforeTestMethodEvent");
+		}
+
+		context.publishEvent(new CustomEvent("beforeEach"));
+		assertThat(applicationEvents.stream(CustomEvent.class)).extracting(CustomEvent::getMessage)//
+				.containsExactly("beforeEach");
+
+		if (!testAlreadyExecuted) {
+			assertEventTypes(applicationEvents, "PrepareTestInstanceEvent", "BeforeTestMethodEvent", "CustomEvent");
+		}
+		else {
+			assertEventTypes(applicationEvents, "BeforeTestMethodEvent", "CustomEvent");
+		}
+	}
+
+	@Test
+	void test1() {
+		assertTestExpectations("test1");
+	}
+
+	@Test
+	void test2() {
+		assertTestExpectations("test2");
+	}
+
+	private void assertTestExpectations(String testName) {
+		if (!testAlreadyExecuted) {
+			assertEventTypes(applicationEvents, "PrepareTestInstanceEvent", "BeforeTestMethodEvent", "CustomEvent",
+					"BeforeTestExecutionEvent");
+		}
+		else {
+			assertEventTypes(applicationEvents, "BeforeTestMethodEvent", "CustomEvent", "BeforeTestExecutionEvent");
+		}
+
+		context.publishEvent(new CustomEvent(testName));
+		assertThat(applicationEvents.stream(CustomEvent.class)).extracting(CustomEvent::getMessage)//
+				.containsExactly("beforeEach", testName);
+
+		if (!testAlreadyExecuted) {
+			assertEventTypes(applicationEvents, "PrepareTestInstanceEvent", "BeforeTestMethodEvent", "CustomEvent",
+					"BeforeTestExecutionEvent", "CustomEvent");
+		}
+		else {
+			assertEventTypes(applicationEvents, "BeforeTestMethodEvent", "CustomEvent", "BeforeTestExecutionEvent",
+					"CustomEvent");
+		}
+	}
+
+	@AfterMethod
+	void afterEach(Method testMethod) {
+		if (!testAlreadyExecuted) {
+			assertEventTypes(applicationEvents, "PrepareTestInstanceEvent", "BeforeTestMethodEvent", "CustomEvent",
+					"BeforeTestExecutionEvent", "CustomEvent", "AfterTestExecutionEvent");
+		}
+		else {
+			assertEventTypes(applicationEvents, "BeforeTestMethodEvent", "CustomEvent", "BeforeTestExecutionEvent",
+					"CustomEvent", "AfterTestExecutionEvent");
+		}
+
+		context.publishEvent(new CustomEvent("afterEach"));
+		assertThat(applicationEvents.stream(CustomEvent.class)).extracting(CustomEvent::getMessage)//
+				.containsExactly("beforeEach", testMethod.getName(), "afterEach");
+
+		if (!testAlreadyExecuted) {
+			assertEventTypes(applicationEvents, "PrepareTestInstanceEvent", "BeforeTestMethodEvent", "CustomEvent",
+					"BeforeTestExecutionEvent", "CustomEvent", "AfterTestExecutionEvent", "CustomEvent");
+			testAlreadyExecuted = true;
+		}
+		else {
+			assertEventTypes(applicationEvents, "BeforeTestMethodEvent", "CustomEvent", "BeforeTestExecutionEvent",
+					"CustomEvent", "AfterTestExecutionEvent", "CustomEvent");
+		}
+	}
+
+
+	private static void assertEventTypes(ApplicationEvents applicationEvents, String... types) {
+		assertThat(applicationEvents.stream().map(event -> event.getClass().getSimpleName()))
+			.containsExactly(types);
+	}
+
+
+	@Configuration
+	static class Config {
+	}
+
+	@SuppressWarnings("serial")
+	static class CustomEvent extends ApplicationEvent {
+
+		private final String message;
+
+
+		CustomEvent(String message) {
+			super(message);
+			this.message = message;
+		}
+
+		String getMessage() {
+			return message;
+		}
+	}
+
+}
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2020 the original author or authors.
+ * Copyright 2002-2021 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
@@ -100,7 +100,7 @@ class HeaderAssertionTests {
 		// Wrong pattern
 		assertThatExceptionOfType(AssertionError.class)
 				.isThrownBy(() -> assertions.valueMatches("Content-Type", ".*ISO-8859-1.*"))
-				.satisfies(ex -> assertThat(ex.getCause()).hasMessage("Response header " +
+				.satisfies(ex -> assertThat(ex).hasMessage("Response header " +
 						"'Content-Type'=[application/json;charset=UTF-8] does not match " +
 						"[.*ISO-8859-1.*]"));
 	}
@@ -117,13 +117,13 @@ class HeaderAssertionTests {

 		assertThatExceptionOfType(AssertionError.class)
 				.isThrownBy(() -> assertions.valuesMatch("foo", ".*", "val.*5"))
-				.satisfies(ex -> assertThat(ex.getCause()).hasMessage(
+				.satisfies(ex -> assertThat(ex).hasMessage(
 						"Response header 'foo' has fewer or more values [value1, value2, value3] " +
 								"than number of patterns to match with [.*, val.*5]"));

 		assertThatExceptionOfType(AssertionError.class)
 				.isThrownBy(() -> assertions.valuesMatch("foo", ".*", "val.*5", ".*"))
-				.satisfies(ex -> assertThat(ex.getCause()).hasMessage(
+				.satisfies(ex -> assertThat(ex).hasMessage(
 						"Response header 'foo'[1]='value2' does not match 'val.*5'"));
 	}

@@ -158,7 +158,7 @@ class HeaderAssertionTests {
 		// Header should not exist
 		assertThatExceptionOfType(AssertionError.class).isThrownBy(() ->
 				assertions.exists("Framework"))
-			.satisfies(ex -> assertThat(ex.getCause()).hasMessage("Response header 'Framework' does not exist"));
+			.satisfies(ex -> assertThat(ex).hasMessage("Response header 'Framework' does not exist"));
 	}

 	@Test
@@ -173,7 +173,7 @@ class HeaderAssertionTests {
 		// Existing header
 		assertThatExceptionOfType(AssertionError.class).isThrownBy(() ->
 				assertions.doesNotExist("Content-Type"))
-			.satisfies(ex -> assertThat(ex.getCause()).hasMessage("Response header " +
+			.satisfies(ex -> assertThat(ex).hasMessage("Response header " +
 					"'Content-Type' exists with value=[application/json;charset=UTF-8]"));
 	}

@@ -189,7 +189,6 @@ class HeaderAssertionTests {
 		// MediaTypes not compatible
 		assertThatExceptionOfType(AssertionError.class)
 			.isThrownBy(() -> assertions.contentTypeCompatibleWith(MediaType.TEXT_XML))
-			.havingCause()
 			.withMessage("Response header 'Content-Type'=[application/xml] is not compatible with [text/xml]");
 	}

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2019 the original author or authors.
+ * Copyright 2002-2020 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
@@ -16,17 +16,14 @@

 package org.springframework.test.web.servlet;

-import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
-import org.junit.jupiter.api.extension.ExtendWith;
+import org.junit.jupiter.api.TestInstance;
+import org.junit.jupiter.api.TestInstance.Lifecycle;

-import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
-import org.springframework.test.context.ContextConfiguration;
-import org.springframework.test.context.junit.jupiter.SpringExtension;
-import org.springframework.test.context.web.WebAppConfiguration;
-import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.test.context.junit.jupiter.web.SpringJUnitWebConfig;
+import org.springframework.web.bind.annotation.GetMapping;
 import org.springframework.web.bind.annotation.RestController;
 import org.springframework.web.context.WebApplicationContext;
 import org.springframework.web.servlet.config.annotation.EnableWebMvc;
@@ -47,29 +44,25 @@ import static org.springframework.test.web.servlet.setup.MockMvcBuilders.webAppC
 * @author Rob Winch
 * @since 4.2
 */
-@ExtendWith(SpringExtension.class)
-@ContextConfiguration
-@WebAppConfiguration
-public class MockMvcReuseTests {
+@SpringJUnitWebConfig
+@TestInstance(Lifecycle.PER_CLASS)
+class MockMvcReuseTests {

 	private static final String HELLO = "hello";
 	private static final String ENIGMA = "enigma";
 	private static final String FOO = "foo";
 	private static final String BAR = "bar";

-	@Autowired
-	private WebApplicationContext wac;
-
-	private MockMvc mvc;
+	private final MockMvc mvc;


-	@BeforeEach
-	public void setUp() {
-		this.mvc = webAppContextSetup(this.wac).build();
+	MockMvcReuseTests(WebApplicationContext wac) {
+		this.mvc = webAppContextSetup(wac).build();
 	}

+
 	@Test
-	public void sessionAttributesAreClearedBetweenInvocations() throws Exception {
+	void sessionAttributesAreClearedBetweenInvocations() throws Exception {

 		this.mvc.perform(get("/"))
 			.andExpect(content().string(HELLO))
@@ -85,7 +78,7 @@ public class MockMvcReuseTests {
 	}

 	@Test
-	public void requestParametersAreClearedBetweenInvocations() throws Exception {
+	void requestParametersAreClearedBetweenInvocations() throws Exception {
 		this.mvc.perform(get("/"))
 			.andExpect(content().string(HELLO));

@@ -102,7 +95,7 @@ public class MockMvcReuseTests {
 	static class Config {

 		@Bean
-		public MyController myController() {
+		MyController myController() {
 			return new MyController();
 		}
 	}
@@ -110,13 +103,13 @@ public class MockMvcReuseTests {
 	@RestController
 	static class MyController {

-		@RequestMapping("/")
-		public String hello() {
+		@GetMapping("/")
+		String hello() {
 			return HELLO;
 		}

-		@RequestMapping(path = "/", params = ENIGMA)
-		public String enigma() {
+		@GetMapping(path = "/", params = ENIGMA)
+		String enigma() {
 			return ENIGMA;
 		}
 	}
@@ -16,19 +16,19 @@

 package org.springframework.test.web.servlet.request;

-import java.nio.charset.StandardCharsets;
-
 import javax.servlet.http.Part;

 import org.junit.jupiter.api.Test;

 import org.springframework.http.HttpMethod;
+import org.springframework.http.MediaType;
 import org.springframework.mock.web.MockHttpServletRequest;
 import org.springframework.mock.web.MockMultipartFile;
+import org.springframework.mock.web.MockMultipartHttpServletRequest;
 import org.springframework.mock.web.MockPart;
 import org.springframework.mock.web.MockServletContext;
-import org.springframework.web.multipart.support.StandardMultipartHttpServletRequest;

+import static java.nio.charset.StandardCharsets.UTF_8;
 import static org.assertj.core.api.Assertions.assertThat;

 /**
@@ -38,17 +38,32 @@ import static org.assertj.core.api.Assertions.assertThat;
 public class MockMultipartHttpServletRequestBuilderTests {

 	@Test // gh-26166
-	void addFilesAndParts() throws Exception {
-		MockHttpServletRequest mockRequest = new MockMultipartHttpServletRequestBuilder("/upload")
-				.file(new MockMultipartFile("file", "test.txt", "text/plain", "Test".getBytes(StandardCharsets.UTF_8)))
-				.part(new MockPart("data", "{\"node\":\"node\"}".getBytes(StandardCharsets.UTF_8)))
-				.buildRequest(new MockServletContext());
+	void addFileAndParts() throws Exception {
+		MockMultipartHttpServletRequest mockRequest =
+				(MockMultipartHttpServletRequest) new MockMultipartHttpServletRequestBuilder("/upload")
+						.file(new MockMultipartFile("file", "test.txt", "text/plain", "Test".getBytes(UTF_8)))
+						.part(new MockPart("name", "value".getBytes(UTF_8)))
+						.buildRequest(new MockServletContext());

-		StandardMultipartHttpServletRequest parsedRequest = new StandardMultipartHttpServletRequest(mockRequest);
+		assertThat(mockRequest.getFileMap()).containsOnlyKeys("file");
+		assertThat(mockRequest.getParameterMap()).containsOnlyKeys("name");
+		assertThat(mockRequest.getParts()).extracting(Part::getName).containsExactly("name");
+	}

-		assertThat(parsedRequest.getParameterMap()).containsOnlyKeys("data");
-		assertThat(parsedRequest.getFileMap()).containsOnlyKeys("file");
-		assertThat(parsedRequest.getParts()).extracting(Part::getName).containsExactly("file", "data");
+	@Test // gh-26261
+	void addFileWithoutFilename() throws Exception {
+		MockPart jsonPart = new MockPart("data", "{\"node\":\"node\"}".getBytes(UTF_8));
+		jsonPart.getHeaders().setContentType(MediaType.APPLICATION_JSON);
+
+		MockMultipartHttpServletRequest mockRequest =
+				(MockMultipartHttpServletRequest) new MockMultipartHttpServletRequestBuilder("/upload")
+						.file(new MockMultipartFile("file", "Test".getBytes(UTF_8)))
+						.part(jsonPart)
+						.buildRequest(new MockServletContext());
+
+		assertThat(mockRequest.getFileMap()).containsOnlyKeys("file");
+		assertThat(mockRequest.getParameterMap()).isEmpty();
+		assertThat(mockRequest.getParts()).extracting(Part::getName).containsExactly("data");
 	}

 	@Test
@@ -123,7 +123,7 @@ public class JettyClientHttpConnector implements ClientHttpConnector {
 		Request request = this.httpClient.newRequest(uri).method(method.toString());

 		return requestCallback.apply(new JettyClientHttpRequest(request, this.bufferFactory))
-				.then(Mono.fromDirect(ReactiveRequest.newBuilder(request).build()
+				.then(Mono.fromDirect(ReactiveRequest.newBuilder(request).abortOnCancel(true).build()
 						.response((reactiveResponse, chunkPublisher) -> {
 							Flux<DataBuffer> content = Flux.from(chunkPublisher).map(this::toDataBuffer);
 							return Mono.just(new JettyClientHttpResponse(reactiveResponse, content));
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2020 the original author or authors.
+ * Copyright 2002-2021 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
@@ -154,7 +154,7 @@ class JettyHeadersAdapter implements MultiValueMap<String, String> {

 	@Override
 	public Set<String> keySet() {
-		return this.headers.getFieldNamesCollection();
+		return new HeaderNames();
 	}

 	@Override
@@ -227,4 +227,52 @@ class JettyHeadersAdapter implements MultiValueMap<String, String> {
 		}
 	}

+
+	private class HeaderNames extends AbstractSet<String> {
+
+		@Override
+		public Iterator<String> iterator() {
+			return new HeaderNamesIterator(headers.getFieldNamesCollection().iterator());
+		}
+
+		@Override
+		public int size() {
+			return headers.getFieldNamesCollection().size();
+		}
+	}
+
+	private final class HeaderNamesIterator implements Iterator<String> {
+
+		private final Iterator<String> iterator;
+
+		@Nullable
+		private String currentName;
+
+		private HeaderNamesIterator(Iterator<String> iterator) {
+			this.iterator = iterator;
+		}
+
+		@Override
+		public boolean hasNext() {
+			return this.iterator.hasNext();
+		}
+
+		@Override
+		public String next() {
+			this.currentName = this.iterator.next();
+			return this.currentName;
+		}
+
+		@Override
+		public void remove() {
+			if (this.currentName == null) {
+				throw new IllegalStateException("No current Header in iterator");
+			}
+			if (!headers.containsKey(this.currentName)) {
+				throw new IllegalStateException("Header not present: " + this.currentName);
+			}
+			headers.remove(this.currentName);
+		}
+	}
+
 }
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2020 the original author or authors.
+ * Copyright 2002-2021 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
@@ -56,7 +56,9 @@ class NettyHeadersAdapter implements MultiValueMap<String, String> {

 	@Override
 	public void add(String key, @Nullable String value) {
-		this.headers.add(key, value);
+		if (value != null) {
+			this.headers.add(key, value);
+		}
 	}

 	@Override
@@ -71,7 +73,9 @@ class NettyHeadersAdapter implements MultiValueMap<String, String> {

 	@Override
 	public void set(String key, @Nullable String value) {
-		this.headers.set(key, value);
+		if (value != null) {
+			this.headers.set(key, value);
+		}
 	}

 	@Override
@@ -153,7 +157,7 @@ class NettyHeadersAdapter implements MultiValueMap<String, String> {

 	@Override
 	public Set<String> keySet() {
-		return this.headers.names();
+		return new HeaderNames();
 	}

 	@Override
@@ -226,4 +230,52 @@ class NettyHeadersAdapter implements MultiValueMap<String, String> {
 		}
 	}

+
+	private class HeaderNames extends AbstractSet<String> {
+
+		@Override
+		public Iterator<String> iterator() {
+			return new HeaderNamesIterator(headers.names().iterator());
+		}
+
+		@Override
+		public int size() {
+			return headers.names().size();
+		}
+	}
+
+	private final class HeaderNamesIterator implements Iterator<String> {
+
+		private final Iterator<String> iterator;
+
+		@Nullable
+		private String currentName;
+
+		private HeaderNamesIterator(Iterator<String> iterator) {
+			this.iterator = iterator;
+		}
+
+		@Override
+		public boolean hasNext() {
+			return this.iterator.hasNext();
+		}
+
+		@Override
+		public String next() {
+			this.currentName = this.iterator.next();
+			return this.currentName;
+		}
+
+		@Override
+		public void remove() {
+			if (this.currentName == null) {
+				throw new IllegalStateException("No current Header in iterator");
+			}
+			if (!headers.contains(this.currentName)) {
+				throw new IllegalStateException("Header not present: " + this.currentName);
+			}
+			headers.remove(this.currentName);
+		}
+	}
+
 }
@@ -21,6 +21,7 @@ import java.util.Map;

 import kotlinx.serialization.KSerializer;
 import kotlinx.serialization.SerializersKt;
+import kotlinx.serialization.descriptors.PolymorphicKind;
 import kotlinx.serialization.json.Json;
 import org.reactivestreams.Publisher;
 import reactor.core.publisher.Flux;
@@ -39,7 +40,9 @@ import org.springframework.util.MimeType;
 * Decode a byte stream into JSON and convert to Object's with
 * <a href="https://github.com/Kotlin/kotlinx.serialization">kotlinx.serialization</a>.
 *
- * <p>This decoder can be used to bind {@code @Serializable} Kotlin classes.
+ * <p>This decoder can be used to bind {@code @Serializable} Kotlin classes,
+ * <a href="https://github.com/Kotlin/kotlinx.serialization/blob/master/docs/polymorphism.md#open-polymorphism">open polymorphic serialization</a>
+ * is not supported.
 * It supports {@code application/json} and {@code application/*+json} with
 * various character sets, {@code UTF-8} being the default.
 *
@@ -132,6 +135,9 @@ public class KotlinSerializationJsonDecoder extends AbstractDecoder<Object> {
 		KSerializer<Object> serializer = serializerCache.get(type);
 		if (serializer == null) {
 			serializer = SerializersKt.serializer(type);
+			if (serializer.getDescriptor().getKind().equals(PolymorphicKind.OPEN.INSTANCE)) {
+				throw new UnsupportedOperationException("Open polymorphic serialization is not supported yet");
+			}
 			serializerCache.put(type, serializer);
 		}
 		return serializer;
@@ -22,6 +22,7 @@ import java.util.Map;

 import kotlinx.serialization.KSerializer;
 import kotlinx.serialization.SerializersKt;
+import kotlinx.serialization.descriptors.PolymorphicKind;
 import kotlinx.serialization.json.Json;
 import org.reactivestreams.Publisher;
 import reactor.core.publisher.Flux;
@@ -42,7 +43,9 @@ import org.springframework.util.MimeType;
 * Encode from an {@code Object} stream to a byte stream of JSON objects using
 * <a href="https://github.com/Kotlin/kotlinx.serialization">kotlinx.serialization</a>.
 *
- * <p>This encoder can be used to bind {@code @Serializable} Kotlin classes.
+ * <p>This encoder can be used to bind {@code @Serializable} Kotlin classes,
+ * <a href="https://github.com/Kotlin/kotlinx.serialization/blob/master/docs/polymorphism.md#open-polymorphism">open polymorphic serialization</a>
+ * is not supported.
 * It supports {@code application/json} and {@code application/*+json} with
 * various character sets, {@code UTF-8} being the default.
 *
@@ -120,6 +123,9 @@ public class KotlinSerializationJsonEncoder extends AbstractEncoder<Object> {
 		KSerializer<Object> serializer = serializerCache.get(type);
 		if (serializer == null) {
 			serializer = SerializersKt.serializer(type);
+			if (serializer.getDescriptor().getKind().equals(PolymorphicKind.OPEN.INSTANCE)) {
+				throw new UnsupportedOperationException("Open polymorphic serialization is not supported yet");
+			}
 			serializerCache.put(type, serializer);
 		}
 		return serializer;
@@ -74,8 +74,7 @@ public class DefaultPartHttpMessageReader extends LoggingCodecSupport implements

 	private boolean streaming;

-	private Scheduler blockingOperationScheduler = Schedulers.newBoundedElastic(Schedulers.DEFAULT_BOUNDED_ELASTIC_SIZE,
-			Schedulers.DEFAULT_BOUNDED_ELASTIC_QUEUESIZE, IDENTIFIER, 60, true);
+	private Scheduler blockingOperationScheduler = Schedulers.boundedElastic();

 	private Mono<Path> fileStorageDirectory = Mono.defer(this::defaultFileStorageDirectory).cache();

@@ -153,8 +152,9 @@ public class DefaultPartHttpMessageReader extends LoggingCodecSupport implements

 	/**
 	 * Sets the Reactor {@link Scheduler} to be used for creating files and
-	 * directories, and writing to files. By default, a bounded scheduler is
-	 * created with default properties.
+	 * directories, and writing to files. By default,
+	 * {@link Schedulers#boundedElastic()} is used, but this property allows for
+	 * changing it to an externally managed scheduler.
 	 * <p>Note that this property is ignored when
 	 * {@linkplain #setStreaming(boolean) streaming} is enabled, or when
 	 * {@link #setMaxInMemorySize(int) maxInMemorySize} is set to -1.
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2018 the original author or authors.
+ * Copyright 2002-2021 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
@@ -33,6 +33,14 @@ public interface FilePart extends Part {

 	/**
 	 * Return the original filename in the client's filesystem.
+	 * <p><strong>Note:</strong> Please keep in mind this filename is supplied
+	 * by the client and should not be used blindly. In addition to not using
+	 * the directory portion, the file name could also contain characters such
+	 * as ".." and others that can be used maliciously.
+	 * @return the original filename, or the empty String if no file has been chosen
+	 * in the multipart form, or {@code null} if not defined or not available
+	 * @see <a href="https://tools.ietf.org/html/rfc7578#section-4.2">RFC 7578, Section 4.2</a>
+	 * @see <a href="https://owasp.org/www-community/vulnerabilities/Unrestricted_File_Upload">Unrestricted File Upload</a>
 	 */
 	String filename();

@@ -118,7 +118,7 @@ public class MultipartWriterSupport extends LoggingCodecSupport {
 		Charset charset = getCharset();
 		if (!charset.equals(StandardCharsets.UTF_8) &&
 				!charset.equals(StandardCharsets.US_ASCII) ) {
-			params.put("charset", getCharset().name());
+			params.put("charset", charset.name());
 		}

 		mediaType = (mediaType != null ? mediaType : MediaType.MULTIPART_FORM_DATA);
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2020 the original author or authors.
+ * Copyright 2002-2021 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
@@ -64,6 +64,7 @@ import org.springframework.http.codec.xml.Jaxb2XmlDecoder;
 import org.springframework.http.codec.xml.Jaxb2XmlEncoder;
 import org.springframework.lang.Nullable;
 import org.springframework.util.ClassUtils;
+import org.springframework.util.ObjectUtils;

 /**
 * Default implementation of {@link CodecConfigurer.DefaultCodecs} that serves
@@ -147,7 +148,38 @@ class BaseDefaultCodecs implements CodecConfigurer.DefaultCodecs, CodecConfigure
 	private boolean registerDefaults = true;


+	// The default reader and writer instances to use
+
+	private final List<HttpMessageReader<?>> typedReaders = new ArrayList<>();
+
+	private final List<HttpMessageReader<?>> objectReaders = new ArrayList<>();
+
+	private final List<HttpMessageWriter<?>> typedWriters = new ArrayList<>();
+
+	private final List<HttpMessageWriter<?>> objectWriters = new ArrayList<>();
+
+
 	BaseDefaultCodecs() {
+		initReaders();
+		initWriters();
+	}
+
+	/**
+	 * Reset and initialize typed readers and object readers.
+	 * @since 5.3.3
+	 */
+	protected void initReaders() {
+		initTypedReaders();
+		initObjectReaders();
+	}
+
+	/**
+	 * Reset and initialize typed writers and object writers.
+	 * @since 5.3.3
+	 */
+	protected void initWriters() {
+		initTypedWriters();
+		initObjectWriters();
 	}

 	/**
@@ -167,61 +199,78 @@ class BaseDefaultCodecs implements CodecConfigurer.DefaultCodecs, CodecConfigure
 		this.maxInMemorySize = other.maxInMemorySize;
 		this.enableLoggingRequestDetails = other.enableLoggingRequestDetails;
 		this.registerDefaults = other.registerDefaults;
+		this.typedReaders.addAll(other.typedReaders);
+		this.objectReaders.addAll(other.objectReaders);
+		this.typedWriters.addAll(other.typedWriters);
+		this.objectWriters.addAll(other.objectWriters);
 	}

 	@Override
 	public void jackson2JsonDecoder(Decoder<?> decoder) {
 		this.jackson2JsonDecoder = decoder;
+		initObjectReaders();
 	}

 	@Override
 	public void jackson2JsonEncoder(Encoder<?> encoder) {
 		this.jackson2JsonEncoder = encoder;
-	}
-
-	@Override
-	public void protobufDecoder(Decoder<?> decoder) {
-		this.protobufDecoder = decoder;
+		initObjectWriters();
 	}

 	@Override
 	public void jackson2SmileDecoder(Decoder<?> decoder) {
 		this.jackson2SmileDecoder = decoder;
+		initObjectReaders();
 	}

 	@Override
 	public void jackson2SmileEncoder(Encoder<?> encoder) {
 		this.jackson2SmileEncoder = encoder;
+		initObjectWriters();
+	}
+
+	@Override
+	public void protobufDecoder(Decoder<?> decoder) {
+		this.protobufDecoder = decoder;
+		initTypedReaders();
 	}

 	@Override
 	public void protobufEncoder(Encoder<?> encoder) {
 		this.protobufEncoder = encoder;
+		initTypedWriters();
 	}

 	@Override
 	public void jaxb2Decoder(Decoder<?> decoder) {
 		this.jaxb2Decoder = decoder;
+		initObjectReaders();
 	}

 	@Override
 	public void jaxb2Encoder(Encoder<?> encoder) {
 		this.jaxb2Encoder = encoder;
+		initObjectWriters();
 	}

 	@Override
 	public void kotlinSerializationJsonDecoder(Decoder<?> decoder) {
 		this.kotlinSerializationJsonDecoder = decoder;
+		initObjectReaders();
 	}

 	@Override
 	public void kotlinSerializationJsonEncoder(Encoder<?> encoder) {
 		this.kotlinSerializationJsonEncoder = encoder;
+		initObjectWriters();
 	}

 	@Override
 	public void maxInMemorySize(int byteCount) {
-		this.maxInMemorySize = byteCount;
+		if (!ObjectUtils.nullSafeEquals(this.maxInMemorySize, byteCount)) {
+			this.maxInMemorySize = byteCount;
+			initReaders();
+		}
 	}

 	@Override
@@ -232,7 +281,11 @@ class BaseDefaultCodecs implements CodecConfigurer.DefaultCodecs, CodecConfigure

 	@Override
 	public void enableLoggingRequestDetails(boolean enable) {
-		this.enableLoggingRequestDetails = enable;
+		if (!ObjectUtils.nullSafeEquals(this.enableLoggingRequestDetails, enable)) {
+			this.enableLoggingRequestDetails = enable;
+			initReaders();
+			initWriters();
+		}
 	}

 	@Override
@@ -245,7 +298,11 @@ class BaseDefaultCodecs implements CodecConfigurer.DefaultCodecs, CodecConfigure
 	 * Delegate method used from {@link BaseCodecConfigurer#registerDefaults}.
 	 */
 	void registerDefaults(boolean registerDefaults) {
-		this.registerDefaults = registerDefaults;
+		if (this.registerDefaults != registerDefaults) {
+			this.registerDefaults = registerDefaults;
+			initReaders();
+			initWriters();
+		}
 	}


@@ -253,28 +310,34 @@ class BaseDefaultCodecs implements CodecConfigurer.DefaultCodecs, CodecConfigure
 	 * Return readers that support specific types.
 	 */
 	final List<HttpMessageReader<?>> getTypedReaders() {
+		return this.typedReaders;
+	}
+
+	/**
+	 * Reset and initialize typed readers.
+	 * @since 5.3.3
+	 */
+	protected void initTypedReaders() {
+		this.typedReaders.clear();
 		if (!this.registerDefaults) {
-			return Collections.emptyList();
+			return;
 		}
-		List<HttpMessageReader<?>> readers = new ArrayList<>();
-		addCodec(readers, new DecoderHttpMessageReader<>(new ByteArrayDecoder()));
-		addCodec(readers, new DecoderHttpMessageReader<>(new ByteBufferDecoder()));
-		addCodec(readers, new DecoderHttpMessageReader<>(new DataBufferDecoder()));
+		addCodec(this.typedReaders, new DecoderHttpMessageReader<>(new ByteArrayDecoder()));
+		addCodec(this.typedReaders, new DecoderHttpMessageReader<>(new ByteBufferDecoder()));
+		addCodec(this.typedReaders, new DecoderHttpMessageReader<>(new DataBufferDecoder()));
 		if (nettyByteBufPresent) {
-			addCodec(readers, new DecoderHttpMessageReader<>(new NettyByteBufDecoder()));
+			addCodec(this.typedReaders, new DecoderHttpMessageReader<>(new NettyByteBufDecoder()));
 		}
-		addCodec(readers, new ResourceHttpMessageReader(new ResourceDecoder()));
-		addCodec(readers, new DecoderHttpMessageReader<>(StringDecoder.textPlainOnly()));
+		addCodec(this.typedReaders, new ResourceHttpMessageReader(new ResourceDecoder()));
+		addCodec(this.typedReaders, new DecoderHttpMessageReader<>(StringDecoder.textPlainOnly()));
 		if (protobufPresent) {
-			addCodec(readers, new DecoderHttpMessageReader<>(this.protobufDecoder != null ?
+			addCodec(this.typedReaders, new DecoderHttpMessageReader<>(this.protobufDecoder != null ?
 					(ProtobufDecoder) this.protobufDecoder : new ProtobufDecoder()));
 		}
-		addCodec(readers, new FormHttpMessageReader());
+		addCodec(this.typedReaders, new FormHttpMessageReader());

 		// client vs server..
-		extendTypedReaders(readers);
-
-		return readers;
+		extendTypedReaders(this.typedReaders);
 	}

 	/**
@@ -293,7 +356,6 @@ class BaseDefaultCodecs implements CodecConfigurer.DefaultCodecs, CodecConfigure
 	 */
 	@SuppressWarnings("rawtypes")
 	private void initCodec(@Nullable Object codec) {
-
 		if (codec instanceof DecoderHttpMessageReader) {
 			codec = ((DecoderHttpMessageReader) codec).getDecoder();
 		}
@@ -386,29 +448,35 @@ class BaseDefaultCodecs implements CodecConfigurer.DefaultCodecs, CodecConfigure
 	 * Return Object readers (JSON, XML, SSE).
 	 */
 	final List<HttpMessageReader<?>> getObjectReaders() {
+		return this.objectReaders;
+	}
+
+	/**
+	 * Reset and initialize object readers.
+	 * @since 5.3.3
+	 */
+	protected void initObjectReaders() {
+		this.objectReaders.clear();
 		if (!this.registerDefaults) {
-			return Collections.emptyList();
+			return;
 		}
-		List<HttpMessageReader<?>> readers = new ArrayList<>();
 		if (kotlinSerializationJsonPresent) {
-			addCodec(readers, new DecoderHttpMessageReader<>(getKotlinSerializationJsonDecoder()));
+			addCodec(this.objectReaders, new DecoderHttpMessageReader<>(getKotlinSerializationJsonDecoder()));
 		}
 		if (jackson2Present) {
-			addCodec(readers, new DecoderHttpMessageReader<>(getJackson2JsonDecoder()));
+			addCodec(this.objectReaders, new DecoderHttpMessageReader<>(getJackson2JsonDecoder()));
 		}
 		if (jackson2SmilePresent) {
-			addCodec(readers, new DecoderHttpMessageReader<>(this.jackson2SmileDecoder != null ?
+			addCodec(this.objectReaders, new DecoderHttpMessageReader<>(this.jackson2SmileDecoder != null ?
 					(Jackson2SmileDecoder) this.jackson2SmileDecoder : new Jackson2SmileDecoder()));
 		}
 		if (jaxb2Present && !shouldIgnoreXml) {
-			addCodec(readers, new DecoderHttpMessageReader<>(this.jaxb2Decoder != null ?
+			addCodec(this.objectReaders, new DecoderHttpMessageReader<>(this.jaxb2Decoder != null ?
 					(Jaxb2XmlDecoder) this.jaxb2Decoder : new Jaxb2XmlDecoder()));
 		}

 		// client vs server..
-		extendObjectReaders(readers);
-
-		return readers;
+		extendObjectReaders(this.objectReaders);
 	}

 	/**
@@ -434,12 +502,20 @@ class BaseDefaultCodecs implements CodecConfigurer.DefaultCodecs, CodecConfigure
 	 */
 	@SuppressWarnings({"rawtypes" })
 	final List<HttpMessageWriter<?>> getTypedWriters() {
+		return this.typedWriters;
+	}
+
+	/**
+	 * Reset and initialize typed writers.
+	 * @since 5.3.3
+	 */
+	protected void initTypedWriters() {
+		this.typedWriters.clear();
 		if (!this.registerDefaults) {
-			return Collections.emptyList();
+			return;
 		}
-		List<HttpMessageWriter<?>> writers = getBaseTypedWriters();
-		extendTypedWriters(writers);
-		return writers;
+		this.typedWriters.addAll(getBaseTypedWriters());
+		extendTypedWriters(this.typedWriters);
 	}

 	/**
@@ -476,12 +552,20 @@ class BaseDefaultCodecs implements CodecConfigurer.DefaultCodecs, CodecConfigure
 	 * Return Object writers (JSON, XML, SSE).
 	 */
 	final List<HttpMessageWriter<?>> getObjectWriters() {
+		return this.objectWriters;
+	}
+
+	/**
+	 * Reset and initialize object writers.
+	 * @since 5.3.3
+	 */
+	protected void initObjectWriters() {
+		this.objectWriters.clear();
 		if (!this.registerDefaults) {
-			return Collections.emptyList();
+			return;
 		}
-		List<HttpMessageWriter<?>> writers = getBaseObjectWriters();
-		extendObjectWriters(writers);
-		return writers;
+		this.objectWriters.addAll(getBaseObjectWriters());
+		extendObjectWriters(this.objectWriters);
 	}

 	/**
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2019 the original author or authors.
+ * Copyright 2002-2021 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
@@ -68,6 +68,7 @@ class ClientDefaultCodecsImpl extends BaseDefaultCodecs implements ClientCodecCo
 	 */
 	void setPartWritersSupplier(Supplier<List<HttpMessageWriter<?>>> supplier) {
 		this.partWritersSupplier = supplier;
+		initTypedWriters();
 	}


@@ -82,15 +83,7 @@ class ClientDefaultCodecsImpl extends BaseDefaultCodecs implements ClientCodecCo
 	@Override
 	public void serverSentEventDecoder(Decoder<?> decoder) {
 		this.sseDecoder = decoder;
-	}
-
-	@Override
-	public ClientDefaultCodecsImpl clone() {
-		ClientDefaultCodecsImpl codecs = new ClientDefaultCodecsImpl();
-		codecs.multipartCodecs = this.multipartCodecs;
-		codecs.sseDecoder = this.sseDecoder;
-		codecs.partWritersSupplier = this.partWritersSupplier;
-		return codecs;
+		initObjectReaders();
 	}

 	@Override
@@ -125,7 +118,7 @@ class ClientDefaultCodecsImpl extends BaseDefaultCodecs implements ClientCodecCo
 	/**
 	 * Default implementation of {@link ClientCodecConfigurer.MultipartCodecs}.
 	 */
-	private static class DefaultMultipartCodecs implements ClientCodecConfigurer.MultipartCodecs {
+	private class DefaultMultipartCodecs implements ClientCodecConfigurer.MultipartCodecs {

 		private final List<HttpMessageWriter<?>> writers = new ArrayList<>();

@@ -141,12 +134,14 @@ class ClientDefaultCodecsImpl extends BaseDefaultCodecs implements ClientCodecCo
 		@Override
 		public ClientCodecConfigurer.MultipartCodecs encoder(Encoder<?> encoder) {
 			writer(new EncoderHttpMessageWriter<>(encoder));
+			initTypedWriters();
 			return this;
 		}

 		@Override
 		public ClientCodecConfigurer.MultipartCodecs writer(HttpMessageWriter<?> writer) {
 			this.writers.add(writer);
+			initTypedWriters();
 			return this;
 		}

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2020 the original author or authors.
+ * Copyright 2002-2021 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
@@ -55,11 +55,13 @@ class ServerDefaultCodecsImpl extends BaseDefaultCodecs implements ServerCodecCo
 	@Override
 	public void multipartReader(HttpMessageReader<?> reader) {
 		this.multipartReader = reader;
+		initTypedReaders();
 	}

 	@Override
 	public void serverSentEventEncoder(Encoder<?> encoder) {
 		this.sseEncoder = encoder;
+		initObjectWriters();
 	}


@@ -475,7 +475,10 @@ public class FormHttpMessageConverter implements HttpMessageConverter<MultiValue

 		byte[] boundary = generateMultipartBoundary();
 		if (!isFilenameCharsetSet()) {
-			parameters.put("charset", this.charset.name());
+			if (!this.charset.equals(StandardCharsets.UTF_8) &&
+					!this.charset.equals(StandardCharsets.US_ASCII)) {
+				parameters.put("charset", this.charset.name());
+			}
 		}
 		parameters.put("boundary", new String(boundary, StandardCharsets.US_ASCII));

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2020 the original author or authors.
+ * Copyright 2002-2021 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
@@ -25,6 +25,7 @@ import java.util.Map;
 import kotlinx.serialization.KSerializer;
 import kotlinx.serialization.SerializationException;
 import kotlinx.serialization.SerializersKt;
+import kotlinx.serialization.descriptors.PolymorphicKind;
 import kotlinx.serialization.json.Json;

 import org.springframework.core.GenericTypeResolver;
@@ -43,7 +44,9 @@ import org.springframework.util.StreamUtils;
 * that can read and write JSON using
 * <a href="https://github.com/Kotlin/kotlinx.serialization">kotlinx.serialization</a>.
 *
- * <p>This converter can be used to bind {@code @Serializable} Kotlin classes.
+ * <p>This converter can be used to bind {@code @Serializable} Kotlin classes,
+ * <a href="https://github.com/Kotlin/kotlinx.serialization/blob/master/docs/polymorphism.md#open-polymorphism">open polymorphic serialization</a>
+ * is not supported.
 * It supports {@code application/json} and {@code application/*+json} with
 * various character sets, {@code UTF-8} being the default.
 *
@@ -182,6 +185,9 @@ public class KotlinSerializationJsonHttpMessageConverter extends AbstractGeneric
 		KSerializer<Object> serializer = serializerCache.get(type);
 		if (serializer == null) {
 			serializer = SerializersKt.serializer(type);
+			if (serializer.getDescriptor().getKind().equals(PolymorphicKind.OPEN.INSTANCE)) {
+				throw new UnsupportedOperationException("Open polymorphic serialization is not supported yet");
+			}
 			serializerCache.put(type, serializer);
 		}
 		return serializer;
@@ -125,6 +125,10 @@ public class ServletServerHttpResponse implements ServerHttpResponse {
 					this.headers.getContentType().getCharset() != null) {
 				this.servletResponse.setCharacterEncoding(this.headers.getContentType().getCharset().name());
 			}
+			long contentLength = getHeaders().getContentLength();
+			if (contentLength != -1) {
+				this.servletResponse.setContentLengthLong(contentLength);
+			}
 			this.headersWritten = true;
 		}
 	}
@@ -18,6 +18,7 @@ package org.springframework.http.server.reactive;

 import java.util.ArrayList;
 import java.util.List;
+import java.util.concurrent.atomic.AtomicBoolean;
 import java.util.concurrent.atomic.AtomicReference;
 import java.util.function.Supplier;

@@ -213,7 +214,7 @@ public abstract class AbstractServerHttpResponse implements ServerHttpResponse {
 			return ((Mono<? extends DataBuffer>) body)
 					.flatMap(buffer -> {
 						touchDataBuffer(buffer);
-						AtomicReference<Boolean> subscribed = new AtomicReference<>(false);
+						AtomicBoolean subscribed = new AtomicBoolean();
 						return doCommit(
 								() -> {
 									try {
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2020 the original author or authors.
+ * Copyright 2002-2021 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
@@ -236,7 +236,7 @@ class DefaultServerHttpRequestBuilder implements ServerHttpRequest.Builder {
 		@SuppressWarnings("unchecked")
 		@Override
 		public <T> T getNativeRequest() {
-			return (T) this.originalRequest;
+			return ServerHttpRequestDecorator.getNativeRequest(this.originalRequest);
 		}

 		@Override
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2020 the original author or authors.
+ * Copyright 2002-2021 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
@@ -154,7 +154,7 @@ class JettyHeadersAdapter implements MultiValueMap<String, String> {

 	@Override
 	public Set<String> keySet() {
-		return this.headers.getFieldNamesCollection();
+		return new HeaderNames();
 	}

 	@Override
@@ -227,4 +227,52 @@ class JettyHeadersAdapter implements MultiValueMap<String, String> {
 		}
 	}

+
+	private class HeaderNames extends AbstractSet<String> {
+
+		@Override
+		public Iterator<String> iterator() {
+			return new HeaderNamesIterator(headers.getFieldNamesCollection().iterator());
+		}
+
+		@Override
+		public int size() {
+			return headers.getFieldNamesCollection().size();
+		}
+	}
+
+	private final class HeaderNamesIterator implements Iterator<String> {
+
+		private final Iterator<String> iterator;
+
+		@Nullable
+		private String currentName;
+
+		private HeaderNamesIterator(Iterator<String> iterator) {
+			this.iterator = iterator;
+		}
+
+		@Override
+		public boolean hasNext() {
+			return this.iterator.hasNext();
+		}
+
+		@Override
+		public String next() {
+			this.currentName = this.iterator.next();
+			return this.currentName;
+		}
+
+		@Override
+		public void remove() {
+			if (this.currentName == null) {
+				throw new IllegalStateException("No current Header in iterator");
+			}
+			if (!headers.containsKey(this.currentName)) {
+				throw new IllegalStateException("Header not present: " + this.currentName);
+			}
+			headers.remove(this.currentName);
+		}
+	}
+
 }
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2020 the original author or authors.
+ * Copyright 2002-2021 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
@@ -56,7 +56,9 @@ class NettyHeadersAdapter implements MultiValueMap<String, String> {

 	@Override
 	public void add(String key, @Nullable String value) {
-		this.headers.add(key, value);
+		if (value != null) {
+			this.headers.add(key, value);
+		}
 	}

 	@Override
@@ -71,7 +73,9 @@ class NettyHeadersAdapter implements MultiValueMap<String, String> {

 	@Override
 	public void set(String key, @Nullable String value) {
-		this.headers.set(key, value);
+		if (value != null) {
+			this.headers.set(key, value);
+		}
 	}

 	@Override
@@ -153,7 +157,7 @@ class NettyHeadersAdapter implements MultiValueMap<String, String> {

 	@Override
 	public Set<String> keySet() {
-		return this.headers.names();
+		return new HeaderNames();
 	}

 	@Override
@@ -226,4 +230,51 @@ class NettyHeadersAdapter implements MultiValueMap<String, String> {
 		}
 	}

+	private class HeaderNames extends AbstractSet<String> {
+
+		@Override
+		public Iterator<String> iterator() {
+			return new HeaderNamesIterator(headers.names().iterator());
+		}
+
+		@Override
+		public int size() {
+			return headers.names().size();
+		}
+	}
+
+	private final class HeaderNamesIterator implements Iterator<String> {
+
+		private final Iterator<String> iterator;
+
+		@Nullable
+		private String currentName;
+
+		private HeaderNamesIterator(Iterator<String> iterator) {
+			this.iterator = iterator;
+		}
+
+		@Override
+		public boolean hasNext() {
+			return this.iterator.hasNext();
+		}
+
+		@Override
+		public String next() {
+			this.currentName = this.iterator.next();
+			return this.currentName;
+		}
+
+		@Override
+		public void remove() {
+			if (this.currentName == null) {
+				throw new IllegalStateException("No current Header in iterator");
+			}
+			if (!headers.contains(this.currentName)) {
+				throw new IllegalStateException("Header not present: " + this.currentName);
+			}
+			headers.remove(this.currentName);
+		}
+	}
+
 }
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2020 the original author or authors.
+ * Copyright 2002-2021 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
@@ -120,6 +120,28 @@ public class ServerHttpRequestDecorator implements ServerHttpRequest {
 	}


+	/**
+	 * Return the native request of the underlying server API, if possible,
+	 * also unwrapping {@link ServerHttpRequestDecorator} if necessary.
+	 * @param request the request to check
+	 * @param <T> the expected native request type
+	 * @throws IllegalArgumentException if the native request can't be obtained
+	 * @since 5.3.3
+	 */
+	public static <T> T getNativeRequest(ServerHttpRequest request) {
+		if (request instanceof AbstractServerHttpRequest) {
+			return ((AbstractServerHttpRequest) request).getNativeRequest();
+		}
+		else if (request instanceof ServerHttpRequestDecorator) {
+			return getNativeRequest(((ServerHttpRequestDecorator) request).getDelegate());
+		}
+		else {
+			throw new IllegalArgumentException(
+					"Can't find native request in " + request.getClass().getName());
+		}
+	}
+
+
 	@Override
 	public String toString() {
 		return getClass().getSimpleName() + " [delegate=" + getDelegate() + "]";
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2018 the original author or authors.
+ * Copyright 2002-2021 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
@@ -110,6 +110,28 @@ public class ServerHttpResponseDecorator implements ServerHttpResponse {
 	}


+	/**
+	 * Return the native response of the underlying server API, if possible,
+	 * also unwrapping {@link ServerHttpResponseDecorator} if necessary.
+	 * @param response the response to check
+	 * @param <T> the expected native response type
+	 * @throws IllegalArgumentException if the native response can't be obtained
+	 * @since 5.3.3
+	 */
+	public static <T> T getNativeResponse(ServerHttpResponse response) {
+		if (response instanceof AbstractServerHttpResponse) {
+			return ((AbstractServerHttpResponse) response).getNativeResponse();
+		}
+		else if (response instanceof ServerHttpResponseDecorator) {
+			return getNativeResponse(((ServerHttpResponseDecorator) response).getDelegate());
+		}
+		else {
+			throw new IllegalArgumentException(
+					"Can't find native response in " + response.getClass().getName());
+		}
+	}
+
+
 	@Override
 	public String toString() {
 		return getClass().getSimpleName() + " [delegate=" + getDelegate() + "]";
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2020 the original author or authors.
+ * Copyright 2002-2021 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
@@ -20,7 +20,6 @@ import java.util.AbstractSet;
 import java.util.Collection;
 import java.util.Collections;
 import java.util.Enumeration;
-import java.util.HashSet;
 import java.util.Iterator;
 import java.util.List;
 import java.util.Map;
@@ -167,12 +166,7 @@ class TomcatHeadersAdapter implements MultiValueMap<String, String> {

 	@Override
 	public Set<String> keySet() {
-		Set<String> result = new HashSet<>(8);
-		Enumeration<String> names = this.headers.names();
-		while (names.hasMoreElements()) {
-			result.add(names.nextElement());
-		}
-		return result;
+		return new HeaderNames();
 	}

 	@Override
@@ -247,4 +241,59 @@ class TomcatHeadersAdapter implements MultiValueMap<String, String> {
 		}
 	}

+
+	private class HeaderNames extends AbstractSet<String> {
+
+		@Override
+		public Iterator<String> iterator() {
+			return new HeaderNamesIterator(headers.names());
+		}
+
+		@Override
+		public int size() {
+			Enumeration<String> names = headers.names();
+			int size = 0;
+			while (names.hasMoreElements()) {
+				names.nextElement();
+				size++;
+			}
+			return size;
+		}
+	}
+
+	private final class HeaderNamesIterator implements Iterator<String> {
+
+		private final Enumeration<String> enumeration;
+
+		@Nullable
+		private String currentName;
+
+		private HeaderNamesIterator(Enumeration<String> enumeration) {
+			this.enumeration = enumeration;
+		}
+
+		@Override
+		public boolean hasNext() {
+			return this.enumeration.hasMoreElements();
+		}
+
+		@Override
+		public String next() {
+			this.currentName = this.enumeration.nextElement();
+			return this.currentName;
+		}
+
+		@Override
+		public void remove() {
+			if (this.currentName == null) {
+				throw new IllegalStateException("No current Header in iterator");
+			}
+			int index = headers.findHeader(this.currentName, 0);
+			if (index == -1) {
+				throw new IllegalStateException("Header not present: " + this.currentName);
+			}
+			headers.removeHeader(index);
+		}
+	}
+
 }
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2020 the original author or authors.
+ * Copyright 2002-2021 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
@@ -149,9 +149,7 @@ class UndertowHeadersAdapter implements MultiValueMap<String, String> {

 	@Override
 	public Set<String> keySet() {
-		return this.headers.getHeaderNames().stream()
-				.map(HttpString::toString)
-				.collect(Collectors.toSet());
+		return new HeaderNames();
 	}

 	@Override
@@ -225,4 +223,52 @@ class UndertowHeadersAdapter implements MultiValueMap<String, String> {
 		}
 	}

+
+	private class HeaderNames extends AbstractSet<String> {
+
+		@Override
+		public Iterator<String> iterator() {
+			return new HeaderNamesIterator(headers.getHeaderNames().iterator());
+		}
+
+		@Override
+		public int size() {
+			return headers.getHeaderNames().size();
+		}
+	}
+
+	private final class HeaderNamesIterator implements Iterator<String> {
+
+		private final Iterator<HttpString> iterator;
+
+		@Nullable
+		private String currentName;
+
+		private HeaderNamesIterator(Iterator<HttpString> iterator) {
+			this.iterator = iterator;
+		}
+
+		@Override
+		public boolean hasNext() {
+			return this.iterator.hasNext();
+		}
+
+		@Override
+		public String next() {
+			this.currentName = this.iterator.next().toString();
+			return this.currentName;
+		}
+
+		@Override
+		public void remove() {
+			if (this.currentName == null) {
+				throw new IllegalStateException("No current Header in iterator");
+			}
+			if (!headers.contains(this.currentName)) {
+				throw new IllegalStateException("Header not present: " + this.currentName);
+			}
+			headers.remove(this.currentName);
+		}
+	}
+
 }
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2018 the original author or authors.
+ * Copyright 2002-2021 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
@@ -33,6 +33,9 @@ import java.lang.annotation.Target;
 * <li>An exception argument: declared as a general Exception or as a more
 * specific exception. This also serves as a mapping hint if the annotation
 * itself does not narrow the exception types through its {@link #value()}.
+ * You may refer to a top-level exception being propagated or to a nested
+ * cause within a wrapper exception. As of 5.3, any cause level is being
+ * exposed, whereas previously only an immediate cause was considered.
 * <li>Request and/or response objects (typically from the Servlet API).
 * You may choose any specific request/response type, e.g.
 * {@link javax.servlet.ServletRequest} / {@link javax.servlet.http.HttpServletRequest}.
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2019 the original author or authors.
+ * Copyright 2002-2020 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
@@ -145,7 +145,7 @@ public abstract class OncePerRequestFilter extends GenericFilterBean {
 	 * @see WebAsyncManager#hasConcurrentResult()
 	 */
 	protected boolean isAsyncDispatch(HttpServletRequest request) {
-		return WebAsyncUtils.getAsyncManager(request).hasConcurrentResult();
+		return request.getDispatcherType().equals(DispatcherType.ASYNC);
 	}

 	/**
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2020 the original author or authors.
+ * Copyright 2002-2021 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
@@ -24,6 +24,7 @@ import javax.servlet.ServletRequest;
 import javax.servlet.ServletResponse;
 import javax.servlet.http.HttpServletRequest;

+import org.springframework.http.server.RequestPath;
 import org.springframework.web.util.ServletRequestPathUtils;

 /**
@@ -48,12 +49,13 @@ public class ServletRequestPathFilter implements Filter {
 	public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
 			throws IOException, ServletException {

+		RequestPath previousRequestPath = (RequestPath) request.getAttribute(ServletRequestPathUtils.PATH_ATTRIBUTE);
 		ServletRequestPathUtils.parseAndCache((HttpServletRequest) request);
 		try {
 			chain.doFilter(request, response);
 		}
 		finally {
-			ServletRequestPathUtils.clearParsedRequestPath(request);
+			ServletRequestPathUtils.setParsedRequestPath(previousRequestPath, request);
 		}
 	}

--- a/Show More
+++ b/Show More
Author	SHA1	Message	Date
Spring Buildmaster	91509805b7	Release v5.3.3	2021-01-12 06:26:25 +00:00
Rossen Stoyanchev	fceceb480f	Validate Resource type in ResourceHttpRequestHandler	2021-01-11 20:54:27 +00:00
Rossen Stoyanchev	e5ab67bd71	ResourceHandlerRegistration exposes List<Resource> locations	2021-01-11 18:40:01 +00:00
Sébastien Deleuze	2d53570f4c	Prevent kotlinx.serialization usage on interfaces Remove support for open polymorphic serialization in kotlinx.serialization web converters and codecs in order to prevent serialization handling suitable for Jackson or other general purpose Java JSON libraries. This will probably need further refinements for collections for example, and could ultimately be fixed when kotlinx.serialization will provide a dedicated function to evaluate upfront if a type can be serialized or not. Closes gh-26298	2021-01-11 19:07:59 +01:00
Juergen Hoeller	be5eb7037f	Explicit notes on non-null enforcement and deep cause support in 5.3 Closes gh-26296 See gh-26317	2021-01-11 19:04:12 +01:00
Sam Brannen	fff2291f2a	Document context lifecycle & logging semantics for the TestContext framework This commit documents ApplicationContext initialization and shutdown logging semantics for console output triggered in conjunction with the Spring TestContext Framework. Closes gh-25385	2021-01-11 17:48:33 +01:00
Stephane Nicoll	917f3ad101	Upgrade to Reactor 2020.0.3 Closes gh-26367	2021-01-11 16:41:03 +01:00
Sam Brannen	2fd6e6e87c	Polish Javadoc for base ExceptionHandlerMethodResolvers	2021-01-11 12:58:19 +01:00
Sam Brannen	570bdbd253	Avoid unnecessary sorting in base ExceptionHandlerMethodResolvers	2021-01-11 12:58:19 +01:00
Juergen Hoeller	b587a16d46	Expose all exception causes as provided handler method arguments Closes gh-26317	2021-01-11 11:10:07 +01:00
Rossen Stoyanchev	dd8ea89bea	Upgrade to Reactor 2020.0.3 snapshots See gh-26367	2021-01-11 09:30:47 +00:00
Juergen Hoeller	b0dea4d3f6	Upgrade to RxJava 2.2.20, OpenPDF 1.3.24, HtmlUnit 2.46	2021-01-11 09:45:14 +01:00
Juergen Hoeller	4ac27e4dab	Suppress ClassCastException for payload type mismatch as well Closes gh-26349	2021-01-11 09:44:38 +01:00
Nelson Osacky	b0abdee012	Add Revved up by Gradle Enterprise badge to Readme Similar to: https://github.com/spring-projects/spring-boot/pull/24640 Closes gh-26348	2021-01-11 09:40:00 +01:00
Brian Clozel	e4dc863ad0	Fix headers keySet in WebFlux adapters Prior to this commit, WebFlux native headers adapters would delegate the `httpHeaders.keySet` to underlying implementations that do not honor the `remove*` methods. This commit fixes the `Set` implementation backing the `httpHeaders.keySet` and ensures that headers can be safely removed from the set. Fixes gh-26361	2021-01-11 09:18:10 +01:00
Rossen Stoyanchev	689b5566bf	Cache "no match" result from ExceptionHandler methods Closes gh-26339	2021-01-08 19:25:11 +00:00
Arjen Poutsma	234b4719c6	Use default bounded elastic scheduler Instead of using a new bounded elastic scheduler per DefaultPartHttpMessageReader instance, which creates daemon threads that are not shut down, we now use the shared bounded elastic scheduler. Closes gh-26347	2021-01-08 14:32:49 +01:00
Arjen Poutsma	ce1ae2f1b2	Only write non-default charset in FormHttpMessageConverter This commit only writes the 'charset' parameter in the written headers if it is non-default (not UTF-8), since RFC7578 states that the only allowed parameter is 'boundary'. See gh-25885 Closes gh-26290	2021-01-08 14:03:58 +01:00
Arjen Poutsma	69ce7d33b9	Polishing	2021-01-08 12:02:13 +01:00
Rossen Stoyanchev	e36d4162c2	Filter empty buffers PayloadMethodArgumentResolver An empty buffer for RSocket is an empty message and while some codecs such as StringDecoder may be able turn that into something such as an empty String, for other formats such as JSON it is invalid input. Closes gh-26344	2021-01-07 17:26:00 +00:00
Arjen Poutsma	d387d9ae1e	Allow quartz expression in cron expression lists This commit introduces support for lists of quartz cron fields, such as "1L, LW" or "TUE#1, TUE#3, TUE#5". Closes gh-26289	2021-01-07 14:27:07 +01:00
Rossen Stoyanchev	138f6bfd84	Update Javadoc of FilePart#filename See gh-26299	2021-01-07 11:26:00 +00:00
Rossen Stoyanchev	a1cf6bbc37	Avoid wrapping of AssertionError in ExchangeResult Closes gh-26303	2021-01-06 21:56:14 +00:00
Rossen Stoyanchev	fb040479eb	Update Javadoc of MultipartFile#getOriginalFilename Closes gh-26299	2021-01-06 21:56:14 +00:00
Rossen Stoyanchev	d50375da8e	Add more static imports to MockMvc snippets Closes gh-26311	2021-01-06 21:56:14 +00:00
Rossen Stoyanchev	fb2e53276c	Assert WebFlux present for WebTestClient Closes gh-26308	2021-01-06 21:56:14 +00:00
Rossen Stoyanchev	c040cd7b05	Parsed RequestPath is recalculated on Forward Closes gh-26318	2021-01-06 21:56:14 +00:00
Brian Clozel	dcc8dcdff8	Set content length on ServletHttpResponse Prior to this commit, the `ServletServerHttpResponse` would copy headers from the `HttpHeaders` map and calls methods related to headers exposed as properties (content-type, character encoding). Unlike its reactive variant, this would not set the content length. Depending on the Servlet container implementation, this could cause duplicate Content-Length response headers in the actual HTTP response. This commit aligns both implementations and ensures that the `setContentLengthLong` method is called if necessary so that the Servlet container can ensure a single header for that. Fixes gh-26330	2021-01-06 20:38:45 +01:00
Paul Warren	efa360cff7	Avoid writing content-length twice in resource handling Prior to this commit, the `ResourceHttpRequestHandler` would write the resource size to the "Content-Length" response header. This is already done by the underlying `ResourceHttpMessageConverter` and `ResourceRegionHttpMessageConverter`. This commit avoid this duplicate operation and delegates instead to the converters. See gh-26330 Closes gh-26340	2021-01-06 20:38:45 +01:00
Juergen Hoeller	5804db6479	Upgrade to Mockito 3.7, Checkstyle 8.39, RxJava 3.0.9, Joda-Time 2.10.9	2021-01-05 19:33:01 +01:00
Rossen Stoyanchev	faa749934b	Minor refactoring - Remove unused clone() code left-over from previous way of cloning. - Lazy instantiation of ServerCodecConfigurer in HttpWebHandlerAdapter since in most cases the configurer instance is set externally. Closes gh-26263	2021-01-05 17:20:26 +00:00
Rossen Stoyanchev	e1385090e4	Cached codec instances in DefaultCodecs Closes gh-26263	2021-01-05 17:20:26 +00:00
Sébastien Deleuze	3113917c55	Update ReactiveAdapterRegistry to do classpath checks during init To improve GraalVM native image footprint and compatibility. Closes gh-26295	2021-01-05 09:17:34 +01:00
Rossen Stoyanchev	994a35d691	Mutated ServerHttpRequest returns native request correctly Closes gh-26304	2021-01-04 21:40:25 +00:00
Juergen Hoeller	8095ba4cd2	Upgrade to Hibernate Validator 6.2 (and Hibernate ORM 5.4.27) Closes gh-26255	2021-01-04 19:10:46 +01:00
Mattison chao	bd2edf26df	Fix implementation of isOpen() in ReactorNettyWebSocketSession See gh-26332 for details. Closes gh-26341	2021-01-04 17:13:39 +01:00
Arjen Poutsma	4f6d26b25c	Parse list with range delta in CronExpression Closes gh-26313	2021-01-04 16:02:28 +01:00
Sébastien Deleuze	6d85a8a0cc	Fix JdbcOperationsExtensions This commit reverts some changes done in `2d5f9723fa` in order to fix JdbcOperations.queryForObject and JdbcOperations.queryForList. It is not possible to provide a vararg variant in Kotlin for now due to a signature clash, but that will probably make sense in Spring Framework 6 timeframe along to array based variant removal for both Java and Kotlin. Closes gh-26312	2021-01-04 14:57:31 +01:00
Sam Brannen	44b29b6ecf	Remove obsolete commandName attribute in spring-form.tld Since support for the commandName attribute was removed from the implementation of FormTag in Spring Framework 5.0, the presence of the commandName attribute in the spring-form.tld file is no longer valid and can lead one to assume that the commandName attribute is still supported -- for example when using code completion in a JSP editor. This commit therefore removes the obsolete commandName attribute in spring-form.tld. Closes gh-26337	2021-01-03 17:46:20 +01:00
Sam Brannen	91a6254187	Test status quo for repeatable @PropertySource on composed annotation This commit introduces tests that verify support for using @PropertySource as a repeatable annotation without the @PropertySources container, both locally on an @Configuration class and on a custom composed annotation. See gh-26329	2021-01-02 16:21:53 +01:00
Sam Brannen	c8ad762b40	Polishing	2021-01-02 16:21:53 +01:00
Sam Brannen	5c1176786c	Test status quo for list support in CronExpression See gh-26289	2020-12-30 14:38:58 +01:00
diguage	eab61f692f	Merge source and substitution configuration in reference docs Closes gh-25545	2020-12-28 20:49:36 +01:00
Sam Brannen	ee41ebc1ab	Polish MockMvcReuseTests	2020-12-28 16:03:16 +01:00
Sam Brannen	885f6dbab9	Ensure ParallelApplicationEventsIntegrationTests passes on CI server See gh-25616	2020-12-23 10:16:13 +01:00
Juergen Hoeller	b0f404722e	Upgrade to ASM master (including early support for Java 17 bytecode) Closes gh-26307	2020-12-21 19:33:33 +01:00
Juergen Hoeller	cd7b0b11f3	Upgrade to Hibernate ORM 5.4.26, Netty 4.1.56, XMLUnit 2.8.2	2020-12-21 19:10:17 +01:00
Sam Brannen	1565f4b83e	Introduce ApplicationEvents to assert events published during tests This commit introduces a new feature in the Spring TestContext Framework (TCF) that provides support for recording application events published in the ApplicationContext so that assertions can be performed against those events within tests. All events published during the execution of a single test are made available via the ApplicationEvents API which allows one to process the events as a java.util.Stream. The following example demonstrates usage of this new feature. @SpringJUnitConfig(/* ... /) @RecordApplicationEvents class OrderServiceTests { @Autowired OrderService orderService; @Autowired ApplicationEvents events; @Test void submitOrder() { // Invoke method in OrderService that publishes an event orderService.submitOrder(new Order(/ ... */)); // Verify that an OrderSubmitted event was published int numEvents = events.stream(OrderSubmitted.class).count(); assertThat(numEvents).isEqualTo(1); } } To enable the feature, a test class must be annotated or meta-annotated with @RecordApplicationEvents. Behind the scenes, a new ApplicationEventsTestExecutionListener manages the registration of ApplicationEvents for the current thread at various points within the test execution lifecycle and makes the current instance of ApplicationEvents available to tests via an @Autowired field in the test class. The latter is made possible by a custom ObjectFactory that is registered as a "resolvable dependency". Thanks to the magic of ObjectFactoryDelegatingInvocationHandler in the spring-beans module, the ApplicationEvents instance injected into test classes is effectively a scoped-proxy that always accesses the ApplicationEvents managed for the current test. The current ApplicationEvents instance is stored in a ThreadLocal variable which is made available in the ApplicationEventsHolder. Although this class is public, it is only intended for use within the TCF or in the implementation of third-party extensions. ApplicationEventsApplicationListener is responsible for listening to all application events and recording them in the current ApplicationEvents instance. A single ApplicationEventsApplicationListener is registered with the test's ApplicationContext by the ApplicationEventsTestExecutionListener. The SpringExtension has also been updated to support parameters of type ApplicationEvents via the JUnit Jupiter ParameterResolver extension API. This allows JUnit Jupiter based tests to receive access to the current ApplicationEvents via test and lifecycle method parameters as an alternative to @Autowired fields in the test class. Closes gh-25616	2020-12-20 23:46:19 +01:00
Sam Brannen	65a395ef0e	Fix syntax in Kotlin example	2020-12-19 15:29:40 +01:00
Juergen Hoeller	947255e377	Always propagate checked exceptions from Kotlin code behind CGLIB proxies Closes gh-23844	2020-12-18 11:55:20 +01:00
Rossen Stoyanchev	499be70a71	Update async dispatch check in OncePerRequestFilter We no longer need to rely on an indirect check since Servlet 3.0 is expected so we can just check the DispatcherType of the request. Closes gh-26282	2020-12-17 17:33:39 +00:00
Rossen Stoyanchev	0cf5005a3d	Apply abortOnCancel in JettyClientHttpConnector This new option allows a cancel signal to abort the request, which is how we expect a connection to be aborted in a reactive chain that involves the WebClient. Closes gh-26287	2020-12-17 17:18:38 +00:00
Rossen Stoyanchev	f07fc76cf3	Limit scheme/host check in fromUriString to HTTP URLs Closes gh-26258	2020-12-17 14:49:57 +00:00
Juergen Hoeller	d3e1c54354	Upgrade to Hibernate Validator 6.1.7, Jetty Reactive HttpClient 1.1.5, Joda-Time 2.10.8, XMLUnit 2.8.1	2020-12-17 10:46:13 +01:00
Juergen Hoeller	a109b4c31a	Translate PostgreSQL code 21000 (cardinality_violation) Closes gh-26276	2020-12-16 22:27:57 +01:00
Juergen Hoeller	00b56c026a	Consistent handling of NullBean instances in resolveNamedBean Closes gh-26271	2020-12-16 22:27:41 +01:00
Juergen Hoeller	fbd2ffdd23	Consistent declarations and assertions in MockMultipartFile See gh-26261	2020-12-16 22:27:33 +01:00
Sam Brannen	b3a47c76f8	Introduce TestContextAnnotationUtils.hasAnnotation()	2020-12-15 22:48:33 +01:00
Sam Brannen	1292947f78	Introduce computeAttribute() in AttributeAccessor This commit introduces computeAttribute() as an interface default method in the AttributeAccessor API. This serves as a convenience analogous to the computeIfAbsent() method in java.util.Map. Closes gh-26281	2020-12-15 22:47:02 +01:00
Sam Brannen	ef6a582c78	Clean up warnings in Gradle build	2020-12-15 22:47:02 +01:00
Rossen Stoyanchev	a11d1c8510	Enrich WebSocketHandler context Closes gh-26210	2020-12-15 21:34:16 +00:00
Brian Clozel	83c19cd60e	Fix NPE when calling NettyHeadersAdapter.add() Prior to this commit, the `NettyHeadersAdapter` would directly delegate the `add()` and `set()` calls to the adapted `io.netty.handler.codec.http.HttpHeaders`. This implementation rejects `null` values with exceptions. This commit aligns the behavior here with other implementations, by not rejecting null values but simply ignoring them. Fixes gh-26274	2020-12-15 13:23:53 +01:00
Rossen Stoyanchev	bcfbde9848	Parse parts in MockMultipartHttpServletRequestBuilder Closes gh-26261	2020-12-14 21:13:29 +00:00
izeye	17e6cf1cc1	Replace AtomicReference<Boolean> with AtomicBoolean in AbstractServerHttpResponse.writeWith()	2020-12-12 10:40:05 +01:00
Juergen Hoeller	ec33b4241a	Upgrade to Netty 4.1.55, Tomcat 9.0.41, Caffeine 2.8.8	2020-12-11 11:53:53 +01:00
Brian Clozel	657641ebaa	Remove JDK14 CI variant from build pipeline	2020-12-11 11:08:33 +01:00
Brian Clozel	4597e9b547	Upgrade CI container images to Ubuntu Focal	2020-12-11 09:46:00 +01:00
Brian Clozel	721dacca5a	Upgrade JDK8, JDK11 and JDK15 versions in CI build	2020-12-11 09:45:21 +01:00
alexscari	9d124fffcb	Fix typo in Javadoc for AbstractJdbcCall Closes gh-26254	2020-12-10 17:32:58 +01:00
Juergen Hoeller	2a47751fcd	Defensively handle loadClass null result in BeanUtils.findEditorByConvention Closes gh-26252	2020-12-10 16:24:32 +01:00
Spring Buildmaster	06e352822a	Next development version (v5.3.3-SNAPSHOT)	2020-12-09 06:11:23 +00:00