Release v5.3.0

2026-06-08 17:33:33 +00:00 · 2020-10-27 14:44:42 +00:00
1666 changed files with 16786 additions and 37746 deletions
@@ -1,5 +1,5 @@
 <!--
-!!! For Security Vulnerabilities, please go to https://spring.io/security-policy !!!
+!!! For Security Vulnerabilities, please go to https://pivotal.io/security !!!
 -->
 **Affects:** \<Spring Framework version>

@@ -14,4 +14,4 @@ Thanks for taking the time to create an issue. Please read the following:
 Issue or Pull Request? Create only one, not both. GitHub treats them as the same.
 If unsure, start with an issue, and if you submit a pull request later, the
 issue will be closed as superseded.
-->
+-->
@@ -41,6 +41,3 @@ out
 test-output
 atlassian-ide-plugin.xml
 .gradletasknamecache
-
-# VS Code
-.vscode/
@@ -72,7 +72,7 @@ to start a discussion first or have already created an issue, once a pull reques
 created, we will close the issue as superseded by the pull request, and the discussion
 about the issue will continue under the pull request.

-1. Always check out the `main` branch and submit pull requests against it
+1. Always check out the `master` branch and submit pull requests against it
 (for target version see [settings.gradle](settings.gradle)).
 Backports to prior versions will be considered on a case-by-case basis and reflected as
 the fix version in the issue tracker.
@@ -125,7 +125,10 @@ The reference documentation is in the [src/docs/asciidoc](src/docs/asciidoc) dir
 edit source files, and submit directly from GitHub.

 When making changes locally, execute `./gradlew asciidoctor` and then browse the result under
-`build/docs/ref-docs/html5/index.html`.
+`build/asciidoc/html5/index.html`.

-Asciidoctor also supports live editing. For more details see
-[AsciiDoc Tooling](https://docs.asciidoctor.org/asciidoctor/latest/tooling/).
+Asciidoctor also supports live editing. For more details read
+[Editing AsciiDoc with Live Preview](https://asciidoctor.org/docs/editing-asciidoc-with-live-preview/).
+Note that if you choose the
+[System Monitor](https://asciidoctor.org/docs/editing-asciidoc-with-live-preview/#using-a-system-monitor)
+option, you can find a Guardfile under `src/docs/asciidoc`.
@@ -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") [![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)
+# <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")

 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". 

@@ -25,10 +25,6 @@ See the [Micro-Benchmarks](https://github.com/spring-projects/spring-framework/w

 See the [Build from Source](https://github.com/spring-projects/spring-framework/wiki/Build-from-Source) Wiki page and the [CONTRIBUTING.md](CONTRIBUTING.md) file.

-## Continuous Integration Builds
-
-Information regarding CI builds can be found in the [Spring Framework Concourse pipeline](ci/README.adoc) documentation.
-
 ## Stay in Touch

 Follow [@SpringCentral](https://twitter.com/springcentral), [@SpringFramework](https://twitter.com/springframework), and its [team members](https://twitter.com/springframework/lists/team/members) on Twitter. In-depth articles can be found at [The Spring Blog](https://spring.io/blog/), and releases are announced via our [news feed](https://spring.io/blog/category/news).
@@ -8,4 +8,4 @@ wiki page.

 ## Reporting a Vulnerability

-Please see https://spring.io/security-policy.
+Please see https://pivotal.io/security.
@@ -1,17 +1,15 @@
 plugins {
-	id 'io.spring.dependency-management' version '1.0.11.RELEASE' apply false
-	id 'io.spring.nohttp' version '0.0.10'
-	id "io.freefair.aspectj" version '6.2.0' apply false
-	id 'org.jetbrains.dokka' version '1.5.0' apply false
-	id 'org.jetbrains.kotlin.jvm' version '1.5.32' apply false
-	id "org.jetbrains.kotlin.plugin.serialization" version "1.5.32" apply false
-	id 'org.asciidoctor.jvm.convert' version '3.3.2'
-	id 'org.asciidoctor.jvm.pdf' version '3.3.2'
-	id "org.unbroken-dome.xjc" version '2.0.0' apply false
-	id "com.github.ben-manes.versions" version '0.39.0'
-	id "com.github.johnrengelman.shadow" version '7.0.0' apply false
-	id 'de.undercouch.download' version '4.1.2'
-	id "me.champeau.jmh" version "0.6.6" apply false
+	id 'io.spring.dependency-management' version '1.0.9.RELEASE' apply false
+	id 'io.spring.nohttp' version '0.0.5.RELEASE'
+	id 'org.jetbrains.kotlin.jvm' version '1.4.10' apply false
+	id 'org.jetbrains.dokka' version '0.10.1' apply false
+	id 'org.asciidoctor.jvm.convert' version '3.1.0'
+	id 'org.asciidoctor.jvm.pdf' version '3.1.0'
+	id 'de.undercouch.download' version '4.1.1'
+	id "io.freefair.aspectj" version '5.1.1' apply false
+	id "com.github.ben-manes.versions" version '0.28.0'
+	id "me.champeau.gradle.jmh" version "0.5.0" apply false
+	id "org.jetbrains.kotlin.plugin.serialization" version "1.4.10" apply false
 }

 ext {
@@ -27,36 +25,35 @@ configure(allprojects) { project ->

 	dependencyManagement {
 		imports {
-			mavenBom "com.fasterxml.jackson:jackson-bom:2.12.6"
-			mavenBom "io.netty:netty-bom:4.1.72.Final"
-			mavenBom "io.projectreactor:reactor-bom:2020.0.15"
-			mavenBom "io.r2dbc:r2dbc-bom:Arabba-SR11"
-			mavenBom "io.rsocket:rsocket-bom:1.1.1"
-			mavenBom "org.eclipse.jetty:jetty-bom:9.4.44.v20210927"
-			mavenBom "org.jetbrains.kotlin:kotlin-bom:1.5.32"
-			mavenBom "org.jetbrains.kotlinx:kotlinx-coroutines-bom:1.5.2"
-			mavenBom "org.jetbrains.kotlinx:kotlinx-serialization-bom:1.2.2"
-			mavenBom "org.junit:junit-bom:5.8.2"
+			mavenBom "com.fasterxml.jackson:jackson-bom:2.11.3"
+			mavenBom "io.netty:netty-bom:4.1.53.Final"
+			mavenBom "io.projectreactor:reactor-bom:2020.0.0"
+			mavenBom "io.r2dbc:r2dbc-bom:Arabba-SR8"
+			mavenBom "io.rsocket:rsocket-bom:1.1.0"
+			mavenBom "org.eclipse.jetty:jetty-bom:9.4.33.v20201020"
+			mavenBom "org.jetbrains.kotlin:kotlin-bom:1.4.10"
+			mavenBom "org.jetbrains.kotlinx:kotlinx-coroutines-bom:1.4.0"
+			mavenBom "org.junit:junit-bom:5.7.0"
 		}
 		dependencies {
-			dependencySet(group: 'org.apache.logging.log4j', version: '2.17.1') {
+			dependencySet(group: 'org.apache.logging.log4j', version: '2.13.3') {
 				entry 'log4j-api'
 				entry 'log4j-core'
 				entry 'log4j-jul'
 				entry 'log4j-slf4j-impl'
 			}
-			dependency "org.slf4j:slf4j-api:1.7.32"
+			dependency "org.slf4j:slf4j-api:1.7.30"
 			dependency("com.google.code.findbugs:findbugs:3.0.1") {
 				exclude group: "dom4j", name: "dom4j"
 			}
 			dependency "com.google.code.findbugs:jsr305:3.0.2"

-			dependencySet(group: 'org.aspectj', version: '1.9.7') {
+			dependencySet(group: 'org.aspectj', version: '1.9.6') {
 				entry 'aspectjrt'
 				entry 'aspectjtools'
 				entry 'aspectjweaver'
 			}
-			dependencySet(group: 'org.codehaus.groovy', version: '3.0.9') {
+			dependencySet(group: 'org.codehaus.groovy', version: '3.0.6') {
 				entry 'groovy'
 				entry 'groovy-jsr223'
 				entry 'groovy-templates'  // requires findbugs for warning-free compilation
@@ -66,24 +63,23 @@ configure(allprojects) { project ->

 			dependency "io.reactivex:rxjava:1.3.8"
 			dependency "io.reactivex:rxjava-reactive-streams:1.2.1"
-			dependency "io.reactivex.rxjava2:rxjava:2.2.21"
-			dependency "io.reactivex.rxjava3:rxjava:3.1.3"
-			dependency "io.smallrye.reactive:mutiny:1.2.0"
-			dependency "io.projectreactor.tools:blockhound:1.0.6.RELEASE"
+			dependency "io.reactivex.rxjava2:rxjava:2.2.19"
+			dependency "io.reactivex.rxjava3:rxjava:3.0.7"
+			dependency "io.projectreactor.tools:blockhound:1.0.4.RELEASE"

 			dependency "com.caucho:hessian:4.0.63"
-			dependency "com.fasterxml:aalto-xml:1.3.0"
-			dependency("com.fasterxml.woodstox:woodstox-core:6.2.7") {
+			dependency "com.fasterxml:aalto-xml:1.2.2"
+			dependency("com.fasterxml.woodstox:woodstox-core:6.2.3") {
 				exclude group: "stax", name: "stax-api"
 			}
-			dependency "com.google.code.gson:gson:2.8.9"
-			dependency "com.google.protobuf:protobuf-java-util:3.19.1"
+			dependency "com.google.code.gson:gson:2.8.6"
+			dependency "com.google.protobuf:protobuf-java-util:3.13.0"
 			dependency "com.googlecode.protobuf-java-format:protobuf-java-format:1.4"
-			dependency("com.thoughtworks.xstream:xstream:1.4.18") {
+			dependency("com.thoughtworks.xstream:xstream:1.4.13") {
 				exclude group: "xpp3", name: "xpp3_min"
 				exclude group: "xmlpull", name: "xmlpull"
 			}
-			dependency "org.apache.johnzon:johnzon-jsonb:1.2.15"
+			dependency "org.apache.johnzon:johnzon-jsonb:1.2.8"
 			dependency("org.codehaus.jettison:jettison:1.3.8") {
 				exclude group: "stax", name: "stax-api"
 			}
@@ -92,16 +88,20 @@ configure(allprojects) { project ->
 				entry 'jibx-run'
 			}
 			dependency "org.ogce:xpp3:1.1.6"
-			dependency "org.yaml:snakeyaml:1.30"
+			dependency "org.yaml:snakeyaml:1.27"
+			dependencySet(group: 'org.jetbrains.kotlinx', version: '1.0.0') {
+				entry 'kotlinx-serialization-core'
+				entry 'kotlinx-serialization-json'
+			}

-			dependency "com.h2database:h2:2.0.206"
-			dependency "com.github.ben-manes.caffeine:caffeine:2.9.3"
-			dependency "com.github.librepdf:openpdf:1.3.26"
-			dependency "com.rometools:rome:1.16.0"
+			dependency "com.h2database:h2:1.4.200"
+			dependency "com.github.ben-manes.caffeine:caffeine:2.8.6"
+			dependency "com.github.librepdf:openpdf:1.3.22"
+			dependency "com.rometools:rome:1.15.0"
 			dependency "commons-io:commons-io:2.5"
-			dependency "io.vavr:vavr:0.10.4"
+			dependency "io.vavr:vavr:0.10.3"
 			dependency "net.sf.jopt-simple:jopt-simple:5.0.4"
-			dependencySet(group: 'org.apache.activemq', version: '5.16.2') {
+			dependencySet(group: 'org.apache.activemq', version: '5.16.0') {
 				entry 'activemq-broker'
 				entry('activemq-kahadb-store') {
 					exclude group: "org.springframework", name: "spring-context"
@@ -116,55 +116,55 @@ configure(allprojects) { project ->
 			}
 			dependency "org.apache.poi:poi-ooxml:4.1.2"
 			dependency "org.apache-extras.beanshell:bsh:2.0b6"
-			dependency "org.freemarker:freemarker:2.3.31"
-			dependency "org.hsqldb:hsqldb:2.5.2"
+			dependency "org.freemarker:freemarker:2.3.30"
+			dependency "org.hsqldb:hsqldb:2.5.1"
 			dependency "org.quartz-scheduler:quartz:2.3.2"
 			dependency "org.codehaus.fabric3.api:commonj:1.1.0"
 			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:5.4.33.Final"
-			dependency "org.hibernate:hibernate-validator:6.2.1.Final"
-			dependency "org.webjars:webjars-locator-core:0.48"
+			dependency "org.hibernate:hibernate-core:5.4.22.Final"
+			dependency "org.hibernate:hibernate-validator:6.1.6.Final"
+			dependency "org.webjars:webjars-locator-core:0.46"
 			dependency "org.webjars:underscorejs:1.8.3"

-			dependencySet(group: 'org.apache.tomcat', version: '9.0.56') {
+			dependencySet(group: 'org.apache.tomcat', version: '9.0.39') {
 				entry 'tomcat-util'
 				entry('tomcat-websocket') {
-					exclude group: "org.apache.tomcat", name: "tomcat-servlet-api"
 					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: '9.0.56') {
+			dependencySet(group: 'org.apache.tomcat.embed', version: '9.0.39') {
 				entry 'tomcat-embed-core'
 				entry 'tomcat-embed-websocket'
 			}
-			dependencySet(group: 'io.undertow', version: '2.2.14.Final') {
+			dependencySet(group: 'io.undertow', version: '2.2.2.Final') {
 				entry 'undertow-core'
-				entry('undertow-servlet') {
-					exclude group: "org.jboss.spec.javax.servlet", name: "jboss-servlet-api_4.0_spec"
-					exclude group: "org.jboss.spec.javax.annotation", name: "jboss-annotations-api_1.3_spec"
-				}
 				entry('undertow-websockets-jsr') {
 					exclude group: "org.jboss.spec.javax.websocket", name: "jboss-websocket-api_1.1_spec"
 				}
+				entry('undertow-servlet') {
+					exclude group: "org.jboss.spec.javax.servlet", name: "jboss-servlet-api_3.1_spec"
+					exclude group: "org.jboss.spec.javax.annotation", name: "jboss-annotations-api_1.2_spec"
+				}
 			}

-			dependency "org.eclipse.jetty:jetty-reactive-httpclient:1.1.10"
-			dependency 'org.apache.httpcomponents.client5:httpclient5:5.1.2'
-			dependency 'org.apache.httpcomponents.core5:httpcore5-reactive:5.1.2'
-			dependency("org.apache.httpcomponents:httpclient:4.5.13") {
-				exclude group: "commons-logging", name: "commons-logging"
-			}
-			dependency("org.apache.httpcomponents:httpasyncclient:4.1.5") {
-				exclude group: "commons-logging", name: "commons-logging"
-			}
 			dependencySet(group: 'com.squareup.okhttp3', version: '3.14.9') {
 				entry 'okhttp'
 				entry 'mockwebserver'
 			}
+			dependency("org.apache.httpcomponents:httpclient:4.5.12") {
+				exclude group: "commons-logging", name: "commons-logging"
+			}
+			dependency("org.apache.httpcomponents:httpasyncclient:4.1.4") {
+				exclude group: "commons-logging", name: "commons-logging"
+			}
+			dependency 'org.apache.httpcomponents.client5:httpclient5:5.0.3'
+			dependency 'org.apache.httpcomponents.core5:httpcore5-reactive:5.0.2'
+			dependency "org.eclipse.jetty:jetty-reactive-httpclient:1.1.4"

-			dependency "org.jruby:jruby:9.2.20.1"
+			dependency "org.jruby:jruby:9.2.13.0"
 			dependency "org.python:jython-standalone:2.7.1"
 			dependency "org.mozilla:rhino:1.7.11"

@@ -181,35 +181,34 @@ configure(allprojects) { project ->
 				exclude group: "dom4j", name: "dom4j"
 			}

-			dependency("junit:junit:4.13.2") {
+			dependency("junit:junit:4.13.1") {
 				exclude group: "org.hamcrest", name: "hamcrest-core"
 			}
 			dependency("de.bechte.junit:junit-hierarchicalcontextrunner:4.12.1") {
 				exclude group: "junit", name: "junit"
 			}
-			dependency "org.testng:testng:7.4.0"
-			dependency "org.junit.support:testng-engine:1.0.1"
+			dependency "org.testng:testng:7.3.0"
 			dependency "org.hamcrest:hamcrest:2.1"
 			dependency "org.awaitility:awaitility:3.1.6"
-			dependency "org.assertj:assertj-core:3.22.0"
-			dependencySet(group: 'org.xmlunit', version: '2.8.4') {
+			dependency "org.assertj:assertj-core:3.17.2"
+			dependencySet(group: 'org.xmlunit', version: '2.6.2') {
 				entry 'xmlunit-assertj'
 				entry('xmlunit-matchers') {
 					exclude group: "org.hamcrest", name: "hamcrest-core"
 				}
 			}
-			dependencySet(group: 'org.mockito', version: '4.2.0') {
+			dependencySet(group: 'org.mockito', version: '3.5.15') {
 				entry('mockito-core') {
 					exclude group: "org.hamcrest", name: "hamcrest-core"
 				}
 				entry 'mockito-junit-jupiter'
 			}
-			dependency "io.mockk:mockk:1.12.1"
+			dependency "io.mockk:mockk:1.10.0"

-			dependency("net.sourceforge.htmlunit:htmlunit:2.56.0") {
+			dependency("net.sourceforge.htmlunit:htmlunit:2.44.0") {
 				exclude group: "commons-logging", name: "commons-logging"
 			}
-			dependency("org.seleniumhq.selenium:htmlunit-driver:2.56.0") {
+			dependency("org.seleniumhq.selenium:htmlunit-driver:2.44.0") {
 				exclude group: "commons-logging", name: "commons-logging"
 			}
 			dependency("org.seleniumhq.selenium:selenium-java:3.141.59") {
@@ -217,7 +216,7 @@ configure(allprojects) { project ->
 				exclude group: "io.netty", name: "netty"
 			}
 			dependency "org.skyscreamer:jsonassert:1.5.0"
-			dependency "com.jayway.jsonpath:json-path:2.6.0"
+			dependency "com.jayway.jsonpath:json-path:2.4.0"
 			dependency "org.bouncycastle:bcpkix-jdk15on:1.66"

 			dependencySet(group: 'org.apache.tiles', version: '3.0.8') {
@@ -237,8 +236,8 @@ configure(allprojects) { project ->

 			dependency "com.ibm.websphere:uow:6.0.2.17"
 			dependency "com.jamonapi:jamon:2.82"
-			dependency "joda-time:joda-time:2.10.13"
-			dependency "org.eclipse.persistence:org.eclipse.persistence.jpa:2.7.9"
+			dependency "joda-time:joda-time:2.10.6"
+			dependency "org.eclipse.persistence:org.eclipse.persistence.jpa:2.7.7"
 			dependency "org.javamoney:moneta:1.3"

 			dependency "com.sun.activation:javax.activation:1.2.0"
@@ -309,23 +308,23 @@ configure([rootProject] + javaProjects) { project ->
 	apply plugin: "java-test-fixtures"
 	apply plugin: "checkstyle"
 	apply plugin: 'org.springframework.build.compile'
-	apply from: "${rootDir}/gradle/toolchains.gradle"
+	apply from: "${rootDir}/gradle/custom-java-home.gradle"
 	apply from: "${rootDir}/gradle/ide.gradle"

 	pluginManager.withPlugin("kotlin") {
 		apply plugin: "org.jetbrains.dokka"
-		apply from: "${rootDir}/gradle/docs-dokka.gradle"
-
 		compileKotlin {
 			kotlinOptions {
+				jvmTarget = "1.8"
 				languageVersion = "1.3"
 				apiVersion = "1.3"
-				freeCompilerArgs = ["-Xjsr305=strict", "-Xsuppress-version-warnings", "-Xopt-in=kotlin.RequiresOptIn"]
+				freeCompilerArgs = ["-Xjsr305=strict"]
 				allWarningsAsErrors = true
 			}
 		}
 		compileTestKotlin {
 			kotlinOptions {
+				jvmTarget = "1.8"
 				freeCompilerArgs = ["-Xjsr305=strict"]
 			}
 		}
@@ -340,36 +339,35 @@ configure([rootProject] + javaProjects) { project ->
 	}

 	checkstyle {
-		toolVersion = "9.2"
+		toolVersion = "8.36.2"
 		configDirectory.set(rootProject.file("src/checkstyle"))
 	}

 	dependencies {
-		testImplementation("org.junit.jupiter:junit-jupiter-api")
-		testImplementation("org.junit.jupiter:junit-jupiter-params")
-		testImplementation("org.junit.platform:junit-platform-suite-api")
-		testImplementation("org.mockito:mockito-core")
-		testImplementation("org.mockito:mockito-junit-jupiter")
-		testImplementation("io.mockk:mockk")
-		testImplementation("org.assertj:assertj-core")
+		testCompile("org.junit.jupiter:junit-jupiter-api")
+		testCompile("org.junit.jupiter:junit-jupiter-params")
+		testCompile("org.mockito:mockito-core")
+		testCompile("org.mockito:mockito-junit-jupiter")
+		testCompile("io.mockk:mockk")
+		testCompile("org.assertj:assertj-core")
 		// Pull in the latest JUnit 5 Launcher API to ensure proper support in IDEs.
-		testRuntimeOnly("org.junit.jupiter:junit-jupiter-engine")
-		testRuntimeOnly("org.junit.platform:junit-platform-launcher")
-		testRuntimeOnly("org.junit.platform:junit-platform-suite-engine")
-		testRuntimeOnly("org.apache.logging.log4j:log4j-core")
-		testRuntimeOnly("org.apache.logging.log4j:log4j-jul")
-		testRuntimeOnly("org.apache.logging.log4j:log4j-slf4j-impl")
+		testRuntime("org.junit.platform:junit-platform-launcher")
+		testRuntime("org.junit.jupiter:junit-jupiter-engine")
+		testRuntime("org.apache.logging.log4j:log4j-core")
+		testRuntime("org.apache.logging.log4j:log4j-slf4j-impl")
+		testRuntime("org.apache.logging.log4j:log4j-jul")
 		// JSR-305 only used for non-required meta-annotations
 		compileOnly("com.google.code.findbugs:jsr305")
 		testCompileOnly("com.google.code.findbugs:jsr305")
-		checkstyle("io.spring.javaformat:spring-javaformat-checkstyle:0.0.29")
+		checkstyle("io.spring.javaformat:spring-javaformat-checkstyle:0.0.15")
 	}

 	ext.javadocLinks = [
 			"https://docs.oracle.com/javase/8/docs/api/",
 			"https://docs.oracle.com/javaee/7/api/",
 			"https://docs.oracle.com/cd/E13222_01/wls/docs90/javadocs/",  // CommonJ
-			"https://www.ibm.com/docs/api/v1/content/SSEQTP_8.5.5/com.ibm.websphere.javadoc.doc/web/apidocs/",
+			"https://www.ibm.com/support/knowledgecenter/SS7JFU_8.5.5/com.ibm.websphere.javadoc.doc/web/apidocs/",
+			"https://glassfish.java.net/nonav/docs/v3/api/",
 			"https://docs.jboss.org/jbossas/javadoc/4.0.5/connector/",
 			"https://docs.jboss.org/jbossas/javadoc/7.1.2.Final/",
 			"https://tiles.apache.org/tiles-request/apidocs/",
@@ -380,15 +378,10 @@ configure([rootProject] + javaProjects) { project ->
 			"https://fasterxml.github.io/jackson-core/javadoc/2.10/",
 			"https://fasterxml.github.io/jackson-databind/javadoc/2.10/",
 			"https://fasterxml.github.io/jackson-dataformat-xml/javadoc/2.10/",
-			"https://hc.apache.org/httpcomponents-client-5.1.x/current/httpclient5/apidocs/",
+			"https://hc.apache.org/httpcomponents-client-ga/httpclient/apidocs/",
 			"https://projectreactor.io/docs/test/release/api/",
-			"https://junit.org/junit4/javadoc/4.13.2/",
-			// Disabling linking to JUnit 5.8.2, since the `package-list` file no longer exists due to
-			// https://github.com/junit-team/junit5/commit/67ad4e545518b0ce2b0e7c96df31a669866d5003.
-			// "https://junit.org/junit5/docs/5.8.2/api/",
-			"https://www.reactive-streams.org/reactive-streams-1.0.3-javadoc/",
-			"https://javadoc.io/static/io.rsocket/rsocket-core/1.1.1/",
-			"https://r2dbc.io/spec/0.8.5.RELEASE/api/"
+			"https://junit.org/junit4/javadoc/4.13.1/",
+			"https://junit.org/junit5/docs/5.7.0/api/"
 	] as String[]
 }

@@ -8,10 +8,16 @@ They are declared in the `build.gradle` file in this folder.
 ### Compiler conventions

 The `org.springframework.build.compile` plugin applies the Java compiler conventions to the build.
+By default, the build compiles sources with Java `1.8` source and target compatibility.
+You can test a different source compatibility version on the CLI with a project property like:
+
+```
+./gradlew test -PjavaSourceVersion=11
+```

 ## Build Plugins

-### Optional dependencies
+## Optional dependencies

 The `org.springframework.build.optional-dependencies` plugin creates a new `optional`
 Gradle configuration - it adds the dependencies to the project's compile and runtime classpath
@@ -19,7 +25,7 @@ but doesn't affect the classpath of dependent projects.
 This plugin does not provide a `provided` configuration, as the native `compileOnly` and `testCompileOnly`
 configurations are preferred.

-### API Diff
+## API Diff

 This plugin uses the [Gradle JApiCmp](https://github.com/melix/japicmp-gradle-plugin) plugin
 to generate API Diff reports for each Spring Framework module. This plugin is applied once on the root
@@ -8,7 +8,8 @@ repositories {
 }

 dependencies {
-	implementation "me.champeau.gradle:japicmp-gradle-plugin:0.3.0"
+	implementation "me.champeau.gradle:japicmp-gradle-plugin:0.2.8"
+	implementation "com.google.guava:guava:28.2-jre" // required by japicmp-gradle-plugin
 }

 gradlePlugin {
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2021 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.
@@ -20,22 +20,31 @@ import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.List;

+import org.gradle.api.JavaVersion;
 import org.gradle.api.Plugin;
 import org.gradle.api.Project;
-import org.gradle.api.plugins.JavaLibraryPlugin;
 import org.gradle.api.plugins.JavaPlugin;
 import org.gradle.api.plugins.JavaPluginConvention;
 import org.gradle.api.tasks.compile.JavaCompile;

 /**
 * {@link Plugin} that applies conventions for compiling Java sources in Spring Framework.
+ * <p>One can override the default Java source compatibility version
+ * with a dedicated property on the CLI: {@code "./gradlew test -PjavaSourceVersion=11"}.
 *
 * @author Brian Clozel
 * @author Sam Brannen
- * @author Sebastien Deleuze
 */
 public class CompilerConventionsPlugin implements Plugin<Project> {

+	/**
+	 * The project property that can be used to switch the Java source
+	 * compatibility version for building source and test classes.
+	 */
+	public static final String JAVA_SOURCE_VERSION_PROPERTY = "javaSourceVersion";
+
+	public static final JavaVersion DEFAULT_COMPILER_VERSION = JavaVersion.VERSION_1_8;
+
 	private static final List<String> COMPILER_ARGS;

 	private static final List<String> TEST_COMPILER_ARGS;
@@ -44,8 +53,7 @@ public class CompilerConventionsPlugin implements Plugin<Project> {
 		List<String> commonCompilerArgs = Arrays.asList(
 				"-Xlint:serial", "-Xlint:cast", "-Xlint:classfile", "-Xlint:dep-ann",
 				"-Xlint:divzero", "-Xlint:empty", "-Xlint:finally", "-Xlint:overrides",
-				"-Xlint:path", "-Xlint:processing", "-Xlint:static", "-Xlint:try", "-Xlint:-options",
-				"-parameters"
+				"-Xlint:path", "-Xlint:processing", "-Xlint:static", "-Xlint:try", "-Xlint:-options"
 		);
 		COMPILER_ARGS = new ArrayList<>();
 		COMPILER_ARGS.addAll(commonCompilerArgs);
@@ -56,12 +64,12 @@ public class CompilerConventionsPlugin implements Plugin<Project> {
 		TEST_COMPILER_ARGS = new ArrayList<>();
 		TEST_COMPILER_ARGS.addAll(commonCompilerArgs);
 		TEST_COMPILER_ARGS.addAll(Arrays.asList("-Xlint:-varargs", "-Xlint:-fallthrough", "-Xlint:-rawtypes",
-				"-Xlint:-deprecation", "-Xlint:-unchecked"));
+				"-Xlint:-deprecation", "-Xlint:-unchecked", "-parameters"));
 	}

 	@Override
 	public void apply(Project project) {
-		project.getPlugins().withType(JavaLibraryPlugin.class, javaPlugin -> applyJavaCompileConventions(project));
+		project.getPlugins().withType(JavaPlugin.class, javaPlugin -> applyJavaCompileConventions(project));
 	}

 	/**
@@ -71,6 +79,15 @@ public class CompilerConventionsPlugin implements Plugin<Project> {
 	 */
 	private void applyJavaCompileConventions(Project project) {
 		JavaPluginConvention java = project.getConvention().getPlugin(JavaPluginConvention.class);
+		if (project.hasProperty(JAVA_SOURCE_VERSION_PROPERTY)) {
+			JavaVersion javaSourceVersion = JavaVersion.toVersion(project.property(JAVA_SOURCE_VERSION_PROPERTY));
+			java.setSourceCompatibility(javaSourceVersion);
+		}
+		else {
+			java.setSourceCompatibility(DEFAULT_COMPILER_VERSION);
+		}
+		java.setTargetCompatibility(DEFAULT_COMPILER_VERSION);
+
 		project.getTasks().withType(JavaCompile.class)
 				.matching(compileTask -> compileTask.getName().equals(JavaPlugin.COMPILE_JAVA_TASK_NAME))
 				.forEach(compileTask -> {
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2021 the original author or authors.
+ * Copyright 2002-2019 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.build.optional;
 import org.gradle.api.Plugin;
 import org.gradle.api.Project;
 import org.gradle.api.artifacts.Configuration;
-import org.gradle.api.attributes.Usage;
 import org.gradle.api.plugins.JavaPlugin;
 import org.gradle.api.plugins.JavaPluginConvention;
 import org.gradle.api.tasks.SourceSetContainer;
@@ -29,7 +28,7 @@ import org.gradle.plugins.ide.eclipse.model.EclipseModel;
 /**
 * A {@code Plugin} that adds support for Maven-style optional dependencies. Creates a new
 * {@code optional} configuration. The {@code optional} configuration is part of the
- * project's compile and runtime classpaths but does not affect the classpath of
+ * project's compile and runtime classpath's but does not affect the classpath of
 * dependent projects.
 *
 * @author Andy Wilkinson
@@ -44,16 +43,22 @@ public class OptionalDependenciesPlugin implements Plugin<Project> {
 	@Override
 	public void apply(Project project) {
 		Configuration optional = project.getConfigurations().create("optional");
-		optional.setCanBeConsumed(false);
-		optional.setCanBeResolved(false);
 		project.getPlugins().withType(JavaPlugin.class, (javaPlugin) -> {
-			SourceSetContainer sourceSets = project.getConvention().getPlugin(JavaPluginConvention.class)
-					.getSourceSets();
+			SourceSetContainer sourceSets = project.getConvention()
+					.getPlugin(JavaPluginConvention.class).getSourceSets();
 			sourceSets.all((sourceSet) -> {
-				project.getConfigurations().getByName(sourceSet.getCompileClasspathConfigurationName()).extendsFrom(optional);
-				project.getConfigurations().getByName(sourceSet.getRuntimeClasspathConfigurationName()).extendsFrom(optional);
+				sourceSet.setCompileClasspath(
+						sourceSet.getCompileClasspath().plus(optional));
+				sourceSet.setRuntimeClasspath(
+						sourceSet.getRuntimeClasspath().plus(optional));
 			});
 		});
+		project.getPlugins().withType(EclipsePlugin.class, (eclipePlugin) -> {
+			project.getExtensions().getByType(EclipseModel.class)
+					.classpath((classpath) -> {
+						classpath.getPlusConfigurations().add(optional);
+					});
+		});
 	}

 }
@@ -1,8 +1,7 @@
 == Spring Framework Concourse pipeline

-The Spring Framework uses https://concourse-ci.org/[Concourse] for its CI build and other automated tasks.
-The Spring team has a dedicated Concourse instance available at https://ci.spring.io with a build pipeline
-for https://ci.spring.io/teams/spring-framework/pipelines/spring-framework-5.3.x[Spring Framework 5.3.x].
+The Spring Framework is using https://concourse-ci.org/[Concourse] for its CI build and other automated tasks.
+The Spring team has a dedicated Concourse instance available at https://ci.spring.io.

 === Setting up your development environment

@@ -26,17 +25,13 @@ spring                https://ci.spring.io  spring-framework      Wed, 25 Mar 20
 ----

 === Pipeline configuration and structure
-
 The build pipelines are described in `pipeline.yml` file.
-
 This file is listing Concourse resources, i.e. build inputs and outputs such as container images, artifact repositories, source repositories, notification services, etc.
-
 It also describes jobs (a job is a sequence of inputs, tasks and outputs); jobs are organized by groups.

 The `pipeline.yml` definition contains `((parameters))` which are loaded from the `parameters.yml` file or from our https://docs.cloudfoundry.org/credhub/[credhub instance].

 You'll find in this folder the following resources:
-
 * `pipeline.yml` the build pipeline
 * `parameters.yml` the build parameters used for the pipeline
 * `images/` holds the container images definitions used in this pipeline
@@ -46,7 +41,6 @@ You'll find in this folder the following resources:
 === Updating the build pipeline

 Updating files on the repository is not enough to update the build pipeline, as changes need to be applied.
-
 The pipeline can be deployed using the following command:

 [source]
@@ -54,4 +48,4 @@ The pipeline can be deployed using the following command:
 $ fly -t spring set-pipeline -p spring-framework-5.3.x -c ci/pipeline.yml -l ci/parameters.yml
 ----

-NOTE: This assumes that you have credhub integration configured with the appropriate secrets.
+NOTE: This assumes that you have credhub integration configured with the appropriate secrets.
@@ -4,7 +4,7 @@ changelog:
    - title: ":star: New Features"
      labels:
        - "type: enhancement"
-    - title: ":lady_beetle: Bug Fixes"
+    - title: ":beetle: Bug Fixes"
      labels:
        - "type: bug"
        - "type: regression"
@@ -1,10 +1,3 @@
-logging:
-  level:
-    io.spring.concourse: DEBUG
-spring:
-  main:
-    banner-mode: off
-sonatype:
-  exclude:
-    - 'build-info\.json'
-    - '.*\.zip'
+distribute:
+  optional-deployments:
+    - '.*\\.zip'
@@ -1,11 +0,0 @@
-FROM ubuntu:focal-20210827
-
-ADD setup.sh /setup.sh
-ADD get-jdk-url.sh /get-jdk-url.sh
-RUN ./setup.sh java8
-
-ENV JAVA_HOME /opt/openjdk/java8
-ENV JDK11 /opt/openjdk/java11
-ENV JDK16 /opt/openjdk/java16
-
-ENV PATH $JAVA_HOME/bin:$PATH
@@ -3,13 +3,16 @@ set -e

 case "$1" in
 	java8)
-		 echo "https://github.com/adoptium/temurin8-binaries/releases/download/jdk8u302-b08/OpenJDK8U-jdk_x64_linux_hotspot_8u302b08.tar.gz"
+		 echo "https://github.com/AdoptOpenJDK/openjdk8-binaries/releases/download/jdk8u265-b01/OpenJDK8U-jdk_x64_linux_hotspot_8u265b01.tar.gz"
 	;;
 	java11)
-		 echo "https://github.com/adoptium/temurin11-binaries/releases/download/jdk-11.0.12%2B7/OpenJDK11U-jdk_x64_linux_hotspot_11.0.12_7.tar.gz"
+		 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"
 	;;
-  java16)
-		 echo "https://github.com/adoptium/temurin16-binaries/releases/download/jdk-16.0.2%2B7/OpenJDK16U-jdk_x64_linux_hotspot_16.0.2_7.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"
+	;;
+  java15)
+		 echo "https://github.com/AdoptOpenJDK/openjdk15-binaries/releases/download/jdk-15%2B36/OpenJDK15U-jdk_x64_linux_hotspot_15_36.tar.gz"
  ;;
  *)
 		echo $"Unknown java version"
@@ -5,34 +5,24 @@ set -ex
 # UTILS
 ###########################################################

-export DEBIAN_FRONTEND=noninteractive
 apt-get update
-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
+apt-get install --no-install-recommends -y ca-certificates net-tools libxml2-utils git curl libudev1 libxml2-utils iptables iproute2 jq fontconfig
 rm -rf /var/lib/apt/lists/*

-curl https://raw.githubusercontent.com/spring-io/concourse-java-scripts/v0.0.4/concourse-java.sh > /opt/concourse-java.sh
+curl https://raw.githubusercontent.com/spring-io/concourse-java-scripts/v0.0.3/concourse-java.sh > /opt/concourse-java.sh

-curl --output /opt/concourse-release-scripts.jar https://repo.spring.io/release/io/spring/concourse/releasescripts/concourse-release-scripts/0.3.2/concourse-release-scripts-0.3.2.jar
+curl --output /opt/concourse-release-scripts.jar https://repo.spring.io/release/io/spring/concourse/releasescripts/concourse-release-scripts/0.2.1/concourse-release-scripts-0.2.1.jar

 ###########################################################
 # JAVA
 ###########################################################
+JDK_URL=$( ./get-jdk-url.sh $1 )

 mkdir -p /opt/openjdk
-pushd /opt/openjdk > /dev/null
-for jdk in java8 java11 java16
-do
-  JDK_URL=$( /get-jdk-url.sh $jdk )
-  mkdir $jdk
-  pushd $jdk > /dev/null
-  curl -L ${JDK_URL} | tar zx --strip-components=1
-  test -f bin/java
-  test -f bin/javac
-  popd > /dev/null
-done
-popd
+cd /opt/openjdk
+curl -L ${JDK_URL} | tar zx --strip-components=1
+test -f /opt/openjdk/bin/java
+test -f /opt/openjdk/bin/javac

 ###########################################################
 # GRADLE ENTERPRISE
@@ -0,0 +1,8 @@
+FROM ubuntu:bionic-20200713
+
+ADD setup.sh /setup.sh
+ADD get-jdk-url.sh /get-jdk-url.sh
+RUN ./setup.sh java8
+
+ENV JAVA_HOME /opt/openjdk
+ENV PATH $JAVA_HOME/bin:$PATH
@@ -0,0 +1,8 @@
+FROM ubuntu:bionic-20200713
+
+ADD setup.sh /setup.sh
+ADD get-jdk-url.sh /get-jdk-url.sh
+RUN ./setup.sh java11
+
+ENV JAVA_HOME /opt/openjdk
+ENV PATH $JAVA_HOME/bin:$PATH
@@ -0,0 +1,8 @@
+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
@@ -0,0 +1,8 @@
+FROM ubuntu:bionic-20200713
+
+ADD setup.sh /setup.sh
+ADD get-jdk-url.sh /get-jdk-url.sh
+RUN ./setup.sh java15
+
+ENV JAVA_HOME /opt/openjdk
+ENV PATH $JAVA_HOME/bin:$PATH
@@ -5,9 +5,10 @@ github-repo: "https://github.com/spring-projects/spring-framework.git"
 github-repo-name: "spring-projects/spring-framework"
 docker-hub-organization: "springci"
 artifactory-server: "https://repo.spring.io"
-branch: "5.3.x"
-milestone: "5.3.x"
+branch: "master"
 build-name: "spring-framework"
 pipeline-name: "spring-framework"
 concourse-url: "https://ci.spring.io"
-task-timeout: 1h00m
+bintray-subject: "spring"
+bintray-repo: "jars"
+task-timeout: 1h00m
@@ -1,29 +1,21 @@
 anchors:
-  git-repo-resource-source: &git-repo-resource-source
-    uri: ((github-repo))
-    username: ((github-username))
-    password: ((github-ci-release-token))
-    branch: ((branch))
-  gradle-enterprise-task-params: &gradle-enterprise-task-params
-    GRADLE_ENTERPRISE_ACCESS_KEY: ((gradle_enterprise_secret_access_key))
-    GRADLE_ENTERPRISE_CACHE_USERNAME: ((gradle_enterprise_cache_user.username))
-    GRADLE_ENTERPRISE_CACHE_PASSWORD: ((gradle_enterprise_cache_user.password))
-  sonatype-task-params: &sonatype-task-params
-    SONATYPE_USERNAME: ((sonatype-username))
-    SONATYPE_PASSWORD: ((sonatype-password))
-    SONATYPE_URL: ((sonatype-url))
-    SONATYPE_STAGING_PROFILE_ID: ((sonatype-staging-profile-id))
  artifactory-task-params: &artifactory-task-params
    ARTIFACTORY_SERVER: ((artifactory-server))
    ARTIFACTORY_USERNAME: ((artifactory-username))
    ARTIFACTORY_PASSWORD: ((artifactory-password))
-  build-project-task-params: &build-project-task-params
-      BRANCH: ((branch))
-      <<: *gradle-enterprise-task-params
+  bintray-task-params: &bintray-task-params
+    BINTRAY_SUBJECT: ((bintray-subject))
+    BINTRAY_REPO: ((bintray-repo))
+    BINTRAY_USERNAME: ((bintray-username))
+    BINTRAY_API_KEY: ((bintray-api-key))
  docker-resource-source: &docker-resource-source
    username: ((docker-hub-username))
    password: ((docker-hub-password))
-    tag: ((milestone))
+    tag: 5.3.x
+  gradle-enterprise-task-params: &gradle-enterprise-task-params
+    GRADLE_ENTERPRISE_ACCESS_KEY: ((gradle_enterprise_secret_access_key))
+    GRADLE_ENTERPRISE_CACHE_USERNAME: ((gradle_enterprise_cache_user.username))
+    GRADLE_ENTERPRISE_CACHE_PASSWORD: ((gradle_enterprise_cache_user.password))
  slack-fail-params: &slack-fail-params
    text: >
      :concourse-failed: <https://ci.spring.io/teams/${BUILD_TEAM_NAME}/pipelines/${BUILD_PIPELINE_NAME}/jobs/${BUILD_JOB_NAME}/builds/${BUILD_NAME}|${BUILD_PIPELINE_NAME} ${BUILD_JOB_NAME} failed!>
@@ -32,6 +24,9 @@ anchors:
    silent: true
    icon_emoji: ":concourse:"
    username: concourse-ci
+  sonatype-task-params: &sonatype-task-params
+    SONATYPE_USER_TOKEN: ((sonatype-user-token))
+    SONATYPE_PASSWORD_TOKEN: ((sonatype-user-token-password))
  changelog-task-params: &changelog-task-params
    name: generated-changelog/tag
    tag: generated-changelog/tag
@@ -42,36 +37,30 @@ anchors:

 resource_types:
 - name: artifactory-resource
-  type: registry-image
+  type: docker-image
  source:
    repository: springio/artifactory-resource
-    tag: 0.0.17
- name: github-release
-  type: registry-image
-  source:
-    repository: concourse/github-release-resource
-    tag: 1.5.5
+    tag: 0.0.12
 - name: github-status-resource
-  type: registry-image
+  type: docker-image
  source:
    repository: dpb587/github-status-resource
    tag: master
- name: pull-request
-  type: registry-image
-  source:
-    repository: teliaoss/github-pr-resource
-    tag: v0.23.0
 - name: slack-notification
-  type: registry-image
+  type: docker-image
  source:
    repository: cfcommunity/slack-notification-resource
    tag: latest
+
 resources:
 - name: git-repo
  type: git
  icon: github
  source:
-    <<: *git-repo-resource-source
+    uri: ((github-repo))
+    username: ((github-username))
+    password: ((github-password))
+    branch: ((branch))
 - name: every-morning
  type: time
  icon: alarm
@@ -86,12 +75,30 @@ resources:
    uri: ((github-repo))
    branch: ((branch))
    paths: ["ci/images/*"]
- name: ci-image
+- name: spring-framework-ci-image
  type: docker-image
  icon: docker
  source:
    <<: *docker-resource-source
-    repository: ((docker-hub-organization))/spring-framework-ci
+    repository: ((docker-hub-organization))/spring-framework-ci-image
+- name: spring-framework-jdk11-ci-image
+  type: docker-image
+  icon: docker
+  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
+  source:
+    <<: *docker-resource-source
+    repository: ((docker-hub-organization))/spring-framework-jdk15-ci-image
 - name: artifactory-repo
  type: artifactory-resource
  icon: package-variant
@@ -100,14 +107,6 @@ resources:
    username: ((artifactory-username))
    password: ((artifactory-password))
    build_name: ((build-name))
- name: git-pull-request
-  type: pull-request
-  icon: source-pull
-  source:
-    access_token: ((github-ci-pull-request-token))
-    repository: ((github-repo-name))
-    base_branch: ((branch))
-    ignore_paths: ["ci/*"]
 - name: repo-status-build
  type: github-status-resource
  icon: eye-check-outline
@@ -124,14 +123,22 @@ resources:
    access_token: ((github-ci-status-token))
    branch: ((branch))
    context: jdk11-build
- name: repo-status-jdk16-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: jdk16-build
+    context: jdk14-build
+- name: repo-status-jdk15-build
+  type: github-status-resource
+  icon: eye-check-outline
+  source:
+    repository: ((github-repo-name))
+    access_token: ((github-ci-status-token))
+    branch: ((branch))
+    context: jdk15-build
 - name: slack-alert
  type: slack-notification
  icon: slack
@@ -154,33 +161,47 @@ resources:
    repository: spring-framework
    access_token: ((github-ci-release-token))
    pre_release: false
+
 jobs:
- name: build-ci-images
+- name: build-spring-framework-ci-images
  plan:
  - get: ci-images-git-repo
    trigger: true
  - in_parallel:
-    - put: ci-image
+    - put: spring-framework-ci-image
      params:
        build: ci-images-git-repo/ci/images
-        dockerfile: ci-images-git-repo/ci/images/ci-image/Dockerfile
+        dockerfile: ci-images-git-repo/ci/images/spring-framework-ci-image/Dockerfile
+    - put: spring-framework-jdk11-ci-image
+      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
+        dockerfile: ci-images-git-repo/ci/images/spring-framework-jdk15-ci-image/Dockerfile
 - name: build
  serial: true
  public: true
  plan:
-  - get: ci-image
+  - get: spring-framework-ci-image
  - get: git-repo
    trigger: true
  - put: repo-status-build
    params: { state: "pending", commit: "git-repo" }
  - do:
    - task: build-project
-      image: ci-image
-      file: git-repo/ci/tasks/build-project.yml
      privileged: true
      timeout: ((task-timeout))
+      image: spring-framework-ci-image
+      file: git-repo/ci/tasks/build-project.yml
      params:
-        <<: *build-project-task-params
+        BRANCH: ((branch))
+        <<: *gradle-enterprise-task-params
    on_failure:
      do:
      - put: repo-status-build
@@ -192,8 +213,6 @@ jobs:
    params: { state: "success", commit: "git-repo" }
  - put: artifactory-repo
    params: &artifactory-params
-      signing_key: ((signing-key))
-      signing_passphrase: ((signing-passphrase))
      repo: libs-snapshot-local
      folder: distribution-repository
      build_uri: "https://ci.spring.io/teams/${BUILD_TEAM_NAME}/pipelines/${BUILD_PIPELINE_NAME}/jobs/${BUILD_JOB_NAME}/builds/${BUILD_NAME}"
@@ -225,7 +244,7 @@ jobs:
  serial: true
  public: true
  plan:
-  - get: ci-image
+  - get: spring-framework-jdk11-ci-image
  - get: git-repo
  - get: every-morning
    trigger: true
@@ -233,13 +252,13 @@ jobs:
    params: { state: "pending", commit: "git-repo" }
  - do:
    - task: check-project
-      image: ci-image
-      file: git-repo/ci/tasks/check-project.yml
      privileged: true
      timeout: ((task-timeout))
+      image: spring-framework-jdk11-ci-image
+      file: git-repo/ci/tasks/check-project.yml
      params:
-        TEST_TOOLCHAIN: 11
-        <<: *build-project-task-params
+        BRANCH: ((branch))
+        <<: *gradle-enterprise-task-params
    on_failure:
      do:
      - put: repo-status-jdk11-build
@@ -249,73 +268,70 @@ jobs:
          <<: *slack-fail-params
  - put: repo-status-jdk11-build
    params: { state: "success", commit: "git-repo" }
- name: jdk16-build
+- name: jdk14-build
  serial: true
  public: true
  plan:
-    - get: ci-image
+    - get: spring-framework-jdk14-ci-image
    - get: git-repo
    - get: every-morning
      trigger: true
-    - put: repo-status-jdk16-build
+    - put: repo-status-jdk14-build
      params: { state: "pending", commit: "git-repo" }
    - do:
      - task: check-project
-        image: ci-image
-        file: git-repo/ci/tasks/check-project.yml
        privileged: true
        timeout: ((task-timeout))
+        image: spring-framework-jdk14-ci-image
+        file: git-repo/ci/tasks/check-project.yml
        params:
-          TEST_TOOLCHAIN: 15
-          <<: *build-project-task-params
+          BRANCH: ((branch))
+          <<: *gradle-enterprise-task-params
      on_failure:
        do:
-          - put: repo-status-jdk16-build
+          - put: repo-status-jdk14-build
            params: { state: "failure", commit: "git-repo" }
          - put: slack-alert
            params:
              <<: *slack-fail-params
-    - put: repo-status-jdk16-build
+    - put: repo-status-jdk14-build
      params: { state: "success", commit: "git-repo" }
- name: build-pull-requests
+- name: jdk15-build
  serial: true
  public: true
  plan:
-    - get: ci-image
+    - get: spring-framework-jdk15-ci-image
    - get: git-repo
-      resource: git-pull-request
+    - get: every-morning
      trigger: true
-      version: every
+    - put: repo-status-jdk15-build
+      params: { state: "pending", commit: "git-repo" }
    - do:
-      - put: git-pull-request
-        params:
-          path: git-repo
-          status: pending
-      - task: build-pr
-        image: ci-image
-        file: git-repo/ci/tasks/build-pr.yml
-        privileged: true
-        timeout: ((task-timeout))
-        params:
-          BRANCH: ((branch))
-      on_success:
-        put: git-pull-request
-        params:
-          path: git-repo
-          status: success
+        - task: check-project
+          privileged: true
+          timeout: ((task-timeout))
+          image: spring-framework-jdk15-ci-image
+          file: git-repo/ci/tasks/check-project.yml
+          params:
+            BRANCH: ((branch))
+            <<: *gradle-enterprise-task-params
      on_failure:
-        put: git-pull-request
-        params:
-          path: git-repo
-          status: failure
+        do:
+          - put: repo-status-jdk15-build
+            params: { state: "failure", commit: "git-repo" }
+          - put: slack-alert
+            params:
+              <<: *slack-fail-params
+    - put: repo-status-jdk15-build
+      params: { state: "success", commit: "git-repo" }
 - name: stage-milestone
  serial: true
  plan:
-    - get: ci-image
+    - get: spring-framework-ci-image
    - get: git-repo
      trigger: false
    - task: stage
-      image: ci-image
+      image: spring-framework-ci-image
      file: git-repo/ci/tasks/stage-version.yml
      params:
        RELEASE_TYPE: M
@@ -330,7 +346,7 @@ jobs:
 - name: promote-milestone
  serial: true
  plan:
-    - get: ci-image
+    - get: spring-framework-ci-image
    - get: git-repo
      trigger: false
    - get: artifactory-repo
@@ -340,7 +356,7 @@ jobs:
        download_artifacts: false
        save_build_info: true
    - task: promote
-      image: ci-image
+      image: spring-framework-ci-image
      file: git-repo/ci/tasks/promote-version.yml
      params:
        RELEASE_TYPE: M
@@ -356,11 +372,11 @@ jobs:
 - name: stage-rc
  serial: true
  plan:
-    - get: ci-image
+    - get: spring-framework-ci-image
    - get: git-repo
      trigger: false
    - task: stage
-      image: ci-image
+      image: spring-framework-ci-image
      file: git-repo/ci/tasks/stage-version.yml
      params:
        RELEASE_TYPE: RC
@@ -375,7 +391,7 @@ jobs:
 - name: promote-rc
  serial: true
  plan:
-    - get: ci-image
+    - get: spring-framework-ci-image
    - get: git-repo
      trigger: false
    - get: artifactory-repo
@@ -385,7 +401,7 @@ jobs:
        download_artifacts: false
        save_build_info: true
    - task: promote
-      image: ci-image
+      image: spring-framework-ci-image
      file: git-repo/ci/tasks/promote-version.yml
      params:
        RELEASE_TYPE: RC
@@ -401,11 +417,11 @@ jobs:
 - name: stage-release
  serial: true
  plan:
-    - get: ci-image
+    - get: spring-framework-ci-image
    - get: git-repo
      trigger: false
    - task: stage
-      image: ci-image
+      image: spring-framework-ci-image
      file: git-repo/ci/tasks/stage-version.yml
      params:
        RELEASE_TYPE: RELEASE
@@ -420,26 +436,26 @@ jobs:
 - name: promote-release
  serial: true
  plan:
-    - get: ci-image
+    - get: spring-framework-ci-image
    - get: git-repo
      trigger: false
    - get: artifactory-repo
      trigger: false
      passed: [stage-release]
      params:
-        download_artifacts: true
+        download_artifacts: false
        save_build_info: true
    - task: promote
-      image: ci-image
+      image: spring-framework-ci-image
      file: git-repo/ci/tasks/promote-version.yml
      params:
        RELEASE_TYPE: RELEASE
        <<: *artifactory-task-params
-        <<: *sonatype-task-params
- name: create-github-release
+        <<: *bintray-task-params
+- name: sync-to-maven-central
  serial: true
  plan:
-    - get: ci-image
+    - get: spring-framework-ci-image
    - get: git-repo
    - get: artifactory-repo
      trigger: true
@@ -447,6 +463,12 @@ jobs:
      params:
        download_artifacts: false
        save_build_info: true
+    - task: sync-to-maven-central
+      image: spring-framework-ci-image
+      file: git-repo/ci/tasks/sync-to-maven-central.yml
+      params:
+        <<: *bintray-task-params
+        <<: *sonatype-task-params
    - task: generate-changelog
      file: git-repo/ci/tasks/generate-changelog.yml
      params:
@@ -458,10 +480,8 @@ jobs:

 groups:
 - name: "builds"
-  jobs: ["build", "jdk11-build", "jdk16-build"]
+  jobs: ["build", "jdk11-build", "jdk14-build", "jdk15-build"]
 - name: "releases"
-  jobs: ["stage-milestone", "stage-rc", "stage-release", "promote-milestone", "promote-rc", "promote-release", "create-github-release"]
+  jobs: ["stage-milestone", "stage-rc", "stage-release", "promote-milestone","promote-rc", "promote-release", "sync-to-maven-central"]
 - name: "ci-images"
-  jobs: ["build-ci-images"]
- name: "pull-requests"
-  jobs: [ "build-pull-requests" ]
+  jobs: ["build-spring-framework-ci-images"]
@@ -1,8 +0,0 @@
-#!/bin/bash
-set -e
-
-source $(dirname $0)/common.sh
-
-pushd git-repo > /dev/null
-./gradlew -Dorg.gradle.internal.launcher.welcomeMessageEnabled=false --no-daemon --max-workers=4 check
-popd > /dev/null
@@ -4,6 +4,5 @@ set -e
 source $(dirname $0)/common.sh

 pushd git-repo > /dev/null
-./gradlew -Dorg.gradle.internal.launcher.welcomeMessageEnabled=false -Porg.gradle.java.installations.fromEnv=JDK11,JDK15 \
-  -PmainToolchain=${MAIN_TOOLCHAIN} -PtestToolchain=${TEST_TOOLCHAIN} --no-daemon --max-workers=4 check
+./gradlew -Dorg.gradle.internal.launcher.welcomeMessageEnabled=false --no-daemon --max-workers=4 check
 popd > /dev/null
@@ -2,7 +2,7 @@
 set -e

 CONFIG_DIR=git-repo/ci/config
-version=$( cat artifactory-repo/build-info.json | jq -r '.buildInfo.modules[0].id' | sed 's/.*:.*:\(.*\)/\1/' )
+version=$( cat version/version )

 java -jar /github-changelog-generator.jar \
  --spring.config.location=${CONFIG_DIR}/changelog-generator.yml \
@@ -6,13 +6,11 @@ CONFIG_DIR=git-repo/ci/config
 version=$( cat artifactory-repo/build-info.json | jq -r '.buildInfo.modules[0].id' | sed 's/.*:.*:\(.*\)/\1/' )
 export BUILD_INFO_LOCATION=$(pwd)/artifactory-repo/build-info.json

-java -jar /opt/concourse-release-scripts.jar \
-  --spring.config.location=${CONFIG_DIR}/release-scripts.yml \
-  publishToCentral $RELEASE_TYPE $BUILD_INFO_LOCATION artifactory-repo || { exit 1; }
+java -jar /opt/concourse-release-scripts.jar promote $RELEASE_TYPE $BUILD_INFO_LOCATION > /dev/null || { exit 1; }

 java -jar /opt/concourse-release-scripts.jar \
  --spring.config.location=${CONFIG_DIR}/release-scripts.yml \
-  promote $RELEASE_TYPE $BUILD_INFO_LOCATION || { exit 1; }
+  distribute $RELEASE_TYPE $BUILD_INFO_LOCATION > /dev/null || { exit 1; }

 echo "Promotion complete"
 echo $version > version/version
@@ -29,8 +29,8 @@ fi
 echo "Staging $stageVersion (next version will be $nextVersion)"
 sed -i "s/version=$snapshotVersion/version=$stageVersion/" gradle.properties

-git config user.name "Spring Builds" > /dev/null
-git config user.email "spring-builds@users.noreply.github.com" > /dev/null
+git config user.name "Spring Buildmaster" > /dev/null
+git config user.email "buildmaster@springframework.org" > /dev/null
 git add gradle.properties > /dev/null
 git commit -m"Release v$stageVersion" > /dev/null
 git tag -a "v$stageVersion" -m"Release v$stageVersion" > /dev/null
@@ -1,19 +0,0 @@
---
-platform: linux
-inputs:
- name: git-repo
-caches:
- path: gradle
-params:
-  BRANCH:
-  CI: true
-  GRADLE_ENTERPRISE_ACCESS_KEY:
-  GRADLE_ENTERPRISE_CACHE_USERNAME:
-  GRADLE_ENTERPRISE_CACHE_PASSWORD:
-  GRADLE_ENTERPRISE_URL: https://ge.spring.io
-run:
-  path: bash
-  args:
-    - -ec
-    - |
-      ${PWD}/git-repo/ci/scripts/build-pr.sh
@@ -10,8 +10,6 @@ caches:
 params:
  BRANCH:
  CI: true
-  MAIN_TOOLCHAIN:
-  TEST_TOOLCHAIN:
  GRADLE_ENTERPRISE_ACCESS_KEY:
  GRADLE_ENTERPRISE_CACHE_USERNAME:
  GRADLE_ENTERPRISE_CACHE_PASSWORD:
@@ -1,13 +1,13 @@
 ---
 platform: linux
 image_resource:
-  type: registry-image
+  type: docker-image
  source:
    repository: springio/github-changelog-generator
-    tag: '0.0.7'
+    tag: '0.0.4'
 inputs:
 - name: git-repo
- name: artifactory-repo
+- name: version
 outputs:
 - name: generated-changelog
 params:
@@ -10,9 +10,9 @@ params:
  ARTIFACTORY_SERVER:
  ARTIFACTORY_USERNAME:
  ARTIFACTORY_PASSWORD:
-  SONATYPE_USER:
-  SONATYPE_PASSWORD:
-  SONATYPE_URL:
-  SONATYPE_STAGING_PROFILE_ID:
+  BINTRAY_SUBJECT:
+  BINTRAY_REPO:
+  BINTRAY_USERNAME:
+  BINTRAY_API_KEY:
 run:
  path: git-repo/ci/scripts/promote-version.sh
@@ -0,0 +1,16 @@
+---
+platform: linux
+inputs:
+- name: git-repo
+- name: artifactory-repo
+outputs:
+- name: version
+params:
+  BINTRAY_REPO:
+  BINTRAY_SUBJECT:
+  BINTRAY_USERNAME:
+  BINTRAY_API_KEY:
+  SONATYPE_USER_TOKEN:
+  SONATYPE_PASSWORD_TOKEN:
+run:
+  path: git-repo/ci/scripts/sync-to-maven-central.sh
@@ -1,4 +1,4 @@
-version=5.3.15
+version=5.3.0
 org.gradle.jvmargs=-Xmx1536M
 org.gradle.caching=true
 org.gradle.parallel=true
@@ -0,0 +1,80 @@
+// -----------------------------------------------------------------------------
+//
+// This script adds support for the following two JVM system properties
+// that control the build for alternative JDKs (i.e., a JDK other than
+// the one used to launch the Gradle process).
+//
+// - customJavaHome: absolute path to the alternate JDK installation to
+//     use to compile Java code and execute tests. This system property
+//     is also used in spring-oxm.gradle to determine whether JiBX is
+//     supported.
+//
+// - customJavaSourceVersion: Java version supplied to the `--release`
+//     command line flag to control the Java source and target
+//     compatibility version. Supported versions include 9 or higher.
+//     Do not set this system property if Java 8 should be used.
+//
+// Examples:
+//
+// ./gradlew -DcustomJavaHome=/Library/Java/JavaVirtualMachines/jdk-14.jdk/Contents/Home test
+//
+// ./gradlew --no-build-cache -DcustomJavaHome=/Library/Java/JavaVirtualMachines/jdk-14.jdk/Contents/Home test
+//
+// ./gradlew -DcustomJavaHome=/Library/Java/JavaVirtualMachines/jdk-14.jdk/Contents/Home -DcustomJavaSourceVersion=14 test
+//
+//
+// Credits: inspired by work from Marc Philipp and Stephane Nicoll
+//
+// -----------------------------------------------------------------------------
+
+import org.gradle.internal.os.OperatingSystem
+// import org.jetbrains.kotlin.gradle.dsl.KotlinJvmCompile
+
+def customJavaHome = System.getProperty("customJavaHome")
+
+if (customJavaHome) {
+	def customJavaHomeDir = new File(customJavaHome)
+	def customJavaSourceVersion = System.getProperty("customJavaSourceVersion")
+
+	tasks.withType(JavaCompile) {
+		logger.info("Java home for " + it.name + " task in " + project.name + ": " + customJavaHomeDir)
+		options.forkOptions.javaHome = customJavaHomeDir
+		inputs.property("customJavaHome", customJavaHome)
+		if (customJavaSourceVersion) {
+			options.compilerArgs += [ "--release", customJavaSourceVersion]
+			inputs.property("customJavaSourceVersion", customJavaSourceVersion)
+		}
+	}
+
+	tasks.withType(GroovyCompile) {
+		logger.info("Java home for " + it.name + " task in " + project.name + ": " + customJavaHomeDir)
+		options.forkOptions.javaHome = customJavaHomeDir
+		inputs.property("customJavaHome", customJavaHome)
+		if (customJavaSourceVersion) {
+			options.compilerArgs += [ "--release", customJavaSourceVersion]
+			inputs.property("customJavaSourceVersion", customJavaSourceVersion)
+		}
+	}
+
+	/*
+	tasks.withType(KotlinJvmCompile) {
+		logger.info("Java home for " + it.name + " task in " + project.name + ": " + customJavaHome)
+		kotlinOptions.jdkHome = customJavaHomeDir
+		inputs.property("customJavaHome", customJavaHome)
+	}
+	*/
+
+	tasks.withType(Test) {
+		def javaExecutable = customJavaHome + "/bin/java"
+		if (OperatingSystem.current().isWindows()) {
+			javaExecutable += ".exe"
+		}
+		logger.info("Java executable for " + it.name + " task in " + project.name + ": " + javaExecutable)
+		executable = javaExecutable
+		inputs.property("customJavaHome", customJavaHome)
+		if (customJavaSourceVersion) {
+			inputs.property("customJavaSourceVersion", customJavaSourceVersion)
+		}
+	}
+
+}
@@ -1,30 +0,0 @@
-tasks.findByName("dokkaHtmlPartial")?.configure {
-	outputDirectory.set(new File(buildDir, "docs/kdoc"))
-	dokkaSourceSets {
-		configureEach {
-			sourceRoots.setFrom(file("src/main/kotlin"))
-			classpath.from(sourceSets["main"].runtimeClasspath)
-			externalDocumentationLink {
-				url.set(new URL("https://docs.spring.io/spring-framework/docs/current/javadoc-api/"))
-			}
-			externalDocumentationLink {
-				url.set(new URL("https://projectreactor.io/docs/core/release/api/"))
-			}
-			externalDocumentationLink {
-				url.set(new URL("https://www.reactive-streams.org/reactive-streams-1.0.3-javadoc/"))
-			}
-			externalDocumentationLink {
-				url.set(new URL("https://kotlin.github.io/kotlinx.coroutines/"))
-			}
-			externalDocumentationLink {
-				url.set(new URL("https://javadoc.io/doc/org.hamcrest/hamcrest/2.1/"))
-			}
-			externalDocumentationLink {
-				url.set(new URL("https://javadoc.io/doc/javax.servlet/javax.servlet-api/latest/"))
-			}
-			externalDocumentationLink {
-				url.set(new URL("https://javadoc.io/static/io.rsocket/rsocket-core/1.1.1/"))
-			}
-		}
-	}
-}
@@ -3,7 +3,7 @@ configurations {
 }

 dependencies {
-	asciidoctorExt("io.spring.asciidoctor:spring-asciidoctor-extensions-block-switch:0.5.0")
+	asciidoctorExt("io.spring.asciidoctor:spring-asciidoctor-extensions-block-switch:0.4.3.RELEASE")
 }

 repositories {
@@ -46,9 +46,8 @@ task api(type: Javadoc) {
 		stylesheetFile = file("src/docs/api/stylesheet.css")
 		splitIndex = true
 		links(project.ext.javadocLinks)
-		addBooleanOption('Xdoclint:syntax', true) // only check syntax with doclint
-		addBooleanOption('Xwerror', true) // fail build on Javadoc warnings
-		if (JavaVersion.current().isJava9Compatible()) {
+		addStringOption('Xdoclint:none', '-quiet')
+		if(JavaVersion.current().isJava9Compatible()) {
 			addBooleanOption('html5', true)
 		}
 	}
@@ -62,18 +61,59 @@ task api(type: Javadoc) {
 /**
 * Produce KDoc for all Spring Framework modules in "build/docs/kdoc"
 */
-pluginManager.withPlugin("kotlin") {
-	tasks.dokkaHtmlMultiModule.configure {
-		dependsOn {
-			tasks.getByName("api")
+dokka {
+	dependsOn {
+		tasks.getByName("api")
+	}
+
+	doFirst {
+		configuration {
+			classpath = moduleProjects.collect { project -> project.jar.outputs.files.getFiles() }.flatten()
+			classpath += files(moduleProjects.collect { it.sourceSets.main.compileClasspath })
+
+			moduleProjects.findAll {
+				it.pluginManager.hasPlugin("kotlin")
+			}.each { project ->
+				def kotlinDirs = project.sourceSets.main.kotlin.srcDirs.collect()
+				kotlinDirs -= project.sourceSets.main.java.srcDirs
+				kotlinDirs.each { dir ->
+					if (dir.exists()) {
+						sourceRoot {
+							path = dir.path
+						}
+					}
+				}
+			}
+		}
+	}
+
+	outputFormat = "html"
+	outputDirectory = "$buildDir/docs/kdoc"
+
+	configuration {
+		moduleName = "spring-framework"
+
+		externalDocumentationLink {
+			url = new URL("https://docs.spring.io/spring-framework/docs/$version/javadoc-api/")
+			packageListUrl = new File(buildDir, "docs/javadoc/package-list").toURI().toURL()
+		}
+		externalDocumentationLink {
+			url = new URL("https://projectreactor.io/docs/core/release/api/")
+		}
+		externalDocumentationLink {
+			url = new URL("https://www.reactive-streams.org/reactive-streams-1.0.1-javadoc/")
+		}
+		externalDocumentationLink {
+			url = new URL("https://kotlin.github.io/kotlinx.coroutines/kotlinx-coroutines-core/")
+		}
+		externalDocumentationLink {
+			url = new URL("https://r2dbc.io/spec/0.8.3.RELEASE/api/")
 		}
-		moduleName.set("spring-framework")
-		outputDirectory.set(project.file("$buildDir/docs/kdoc"))
 	}
 }

 task downloadResources(type: Download) {
-	def version = "0.2.5"
+	def version = "0.2.2.RELEASE"
 	src "https://repo.spring.io/release/io/spring/docresources/" +
 			"spring-doc-resources/$version/spring-doc-resources-${version}.zip"
 	dest project.file("$buildDir/docs/spring-doc-resources.zip")
@@ -87,8 +127,6 @@ task extractDocResources(type: Copy, dependsOn: downloadResources) {
 }

 asciidoctorj {
-	def docRoot = 'https://docs.spring.io'
-	def docsSpringFramework = "${docRoot}/spring-framework/docs/${project.version}"
 	version = '2.4.1'
 	fatalWarnings ".*"
 	options doctype: 'book', eruby: 'erubis'
@@ -96,7 +134,7 @@ asciidoctorj {
 			icons: 'font',
 			idprefix: '',
 			idseparator: '-',
-			docinfo: 'shared,private-header', // https://docs.asciidoctor.org/asciidoctor/latest/docinfo/
+			docinfo: 'shared',
 			revnumber: project.version,
 			sectanchors: '',
 			sectnums: '',
@@ -105,11 +143,7 @@ asciidoctorj {
 			'highlightjs-theme': 'googlecode',
 			stylesdir: 'css/',
 			stylesheet: 'stylesheet.css',
-			'spring-version': project.version,
-			'spring-framework-main-code': 'https://github.com/spring-projects/spring-framework/tree/main',
-			'doc-root': docRoot,
-			'docs-spring-framework': docsSpringFramework,
-			'api-spring-framework': "${docsSpringFramework}/javadoc-api/org/springframework"
+			'spring-version': project.version
 	])
 }

@@ -150,7 +184,7 @@ asciidoctorPdf {
 /**
 * Zip all docs (API and reference) into a single archive
 */
-task docsZip(type: Zip, dependsOn: ['api', 'asciidoctor', 'asciidoctorPdf', 'dokkaHtmlMultiModule']) {
+task docsZip(type: Zip, dependsOn: ['api', 'asciidoctor', 'asciidoctorPdf', 'dokka']) {
 	group = "Distribution"
 	description = "Builds -${archiveClassifier} archive containing api and reference " +
 			"for deployment at https://docs.spring.io/spring-framework/docs."
@@ -169,7 +203,7 @@ task docsZip(type: Zip, dependsOn: ['api', 'asciidoctor', 'asciidoctorPdf', 'dok
 	from ("$asciidoctorPdf.outputDir") {
 		into "reference/pdf"
 	}
-	from (dokkaHtmlMultiModule.outputDirectory) {
+	from (dokka) {
 		into "kdoc-api"
 	}
 }
@@ -226,11 +260,11 @@ task distZip(type: Zip, dependsOn: [docsZip, schemaZip]) {
 		expand(copyright: new Date().format("yyyy"), version: project.version)
 	}

-	from(zipTree(docsZip.archiveFile)) {
+	from(zipTree(docsZip.archivePath)) {
 		into "${baseDir}/docs"
 	}

-	from(zipTree(schemaZip.archiveFile)) {
+	from(zipTree(schemaZip.archivePath)) {
 		into "${baseDir}/schema"
 	}

@@ -1,7 +1,7 @@
 import org.gradle.plugins.ide.eclipse.model.ProjectDependency
 import org.gradle.plugins.ide.eclipse.model.SourceFolder

-apply plugin: 'eclipse'
+apply plugin: "eclipse"

 eclipse.jdt {
 	sourceCompatibility = 1.8
@@ -18,71 +18,103 @@ eclipse.classpath.file.whenMerged { classpath ->
 		if (matcher) {
 			def projectName = matcher[0][1]
 			def path = "/${projectName}"
-			if (!classpath.entries.find { e -> e instanceof ProjectDependency && e.path == path }) {
-				def recursiveDependency = entry.path.matches('.+/' + projectName + '/build/([^/]+/)+(?:main|test)')
-				// Avoid recursive dependency on current project.
-				if (!recursiveDependency) {
-					classpath.entries.add(new ProjectDependency(path))
-				}
+			if(!classpath.entries.find { e -> e instanceof ProjectDependency && e.path == path }) {
+				def dependency = new ProjectDependency(path)
+				dependency.exported = true
+				classpath.entries.add(dependency)
 			}
 			classpath.entries.remove(entry)
 		}
 	}
-
-	// Remove any remaining direct depencencies on JARs in the build/libs folder
-	// except Spring's spring-cglib-repack and spring-objenesis-repack JARs.
 	classpath.entries.removeAll { entry -> (entry.path =~ /(?!.*?repack.*\.jar).*?\/([^\/]+)\/build\/libs\/[^\/]+\.jar/) }
 }

+
 // Use separate main/test outputs (prevents WTP from packaging test classes)
-eclipse.classpath.defaultOutputDir = file(project.name + '/bin/eclipse')
+eclipse.classpath.defaultOutputDir = file(project.name+"/bin/eclipse")
 eclipse.classpath.file.beforeMerged { classpath ->
 	classpath.entries.findAll{ it instanceof SourceFolder }.each {
-		if (it.output.startsWith('bin/')) {
+		if(it.output.startsWith("bin/")) {
 			it.output = null
 		}
 	}
 }
-eclipse.classpath.file.whenMerged {
-	entries.findAll{ it instanceof SourceFolder }.each {
-		it.output = 'bin/' + it.path.split('/')[1]
+eclipse.classpath.file.whenMerged { classpath ->
+	classpath.entries.findAll{ it instanceof SourceFolder }.each {
+		it.output = "bin/" + it.path.split("/")[1]
 	}
 }

 // Ensure project dependencies come after 3rd-party libs (SPR-11836)
 // https://jira.spring.io/browse/SPR-11836
-eclipse.classpath.file.whenMerged {
-	entries.findAll { it instanceof ProjectDependency }.each {
+eclipse.classpath.file.whenMerged { classpath ->
+	classpath.entries.findAll { it instanceof ProjectDependency }.each {
 		// delete from original position
-		entries.remove(it)
+		classpath.entries.remove(it)
 		// append to end of classpath
-		entries.add(it)
+		classpath.entries.add(it)
 	}
 }

-// Ensure that JMH sources and resources are treated as test classpath entries
-// so that they can see test fixtures.
-// https://github.com/melix/jmh-gradle-plugin/issues/157
-eclipse.classpath.file.whenMerged {
-	entries.findAll { it.path =~ /src\/jmh\/(java|resources)/ }.each {
-		it.entryAttributes['test'] = 'true'
-	}
-}
+// Allow projects to be used as WTP modules
+eclipse.project.natures "org.eclipse.wst.common.project.facet.core.nature"

 // Include project specific settings
 task eclipseSettings(type: Copy) {
 	from rootProject.files(
-		'src/eclipse/org.eclipse.jdt.core.prefs',
-		'src/eclipse/org.eclipse.jdt.ui.prefs')
+		"src/eclipse/org.eclipse.jdt.ui.prefs",
+		"src/eclipse/org.eclipse.wst.common.project.facet.core.xml")
 	into project.file('.settings/')
 	outputs.upToDateWhen { false }
 }

-task cleanEclipseSettings(type: Delete) {
-	delete project.file('.settings/org.eclipse.jdt.core.prefs')
-	delete project.file('.settings/org.eclipse.jdt.ui.prefs')
+task eclipseWstComponent(type: Copy) {
+	from rootProject.files(
+		"src/eclipse/org.eclipse.wst.common.component")
+	into project.file('.settings/')
+	expand(deployname: project.name)
+	outputs.upToDateWhen { false }
 }

-tasks['eclipse'].dependsOn(eclipseSettings)
-tasks['eclipseJdt'].dependsOn(eclipseSettings)
-tasks['cleanEclipse'].dependsOn(cleanEclipseSettings)
+task eclipseJdtPrepare(type: Copy) {
+	from rootProject.file("src/eclipse/org.eclipse.jdt.core.prefs")
+	into project.file(".settings/")
+	outputs.upToDateWhen { false }
+}
+
+task cleanEclipseJdtUi(type: Delete) {
+	delete project.file(".settings/org.eclipse.jdt.core.prefs")
+	delete project.file(".settings/org.eclipse.jdt.ui.prefs")
+	delete project.file(".settings/org.eclipse.wst.common.component")
+	delete project.file(".settings/org.eclipse.wst.common.project.facet.core.xml")
+}
+
+task eclipseBuildship(type: Copy) {
+	from rootProject.files(
+		"src/eclipse/org.eclipse.jdt.ui.prefs",
+		"src/eclipse/org.eclipse.jdt.core.prefs")
+	into project.file('.settings/')
+	outputs.upToDateWhen { false }
+}
+
+tasks["eclipseJdt"].dependsOn(eclipseJdtPrepare)
+tasks["cleanEclipse"].dependsOn(cleanEclipseJdtUi)
+tasks["eclipse"].dependsOn(eclipseSettings, eclipseWstComponent)
+
+
+// Filter 'build' folder
+eclipse.project.file.withXml {
+	def node = it.asNode()
+
+	def filteredResources = node.get("filteredResources")
+	if(filteredResources) {
+		node.remove(filteredResources)
+	}
+	def filterNode = node.appendNode("filteredResources").appendNode("filter")
+	filterNode.appendNode("id", "1359048889071")
+	filterNode.appendNode("name", "")
+	filterNode.appendNode("type", "30")
+	def matcherNode = filterNode.appendNode("matcher")
+	matcherNode.appendNode("id", "org.eclipse.ui.ide.multiFilter")
+	matcherNode.appendNode("arguments", "1.0-projectRelativePath-matches-false-false-build")
+}
@@ -1,42 +1,17 @@
-apply plugin: 'java-library'
 apply plugin: 'org.springframework.build.compile'
 apply plugin: 'org.springframework.build.optional-dependencies'
-// Uncomment the following for Shadow support in the jmhJar block.
-// Currently commented out due to ZipException: archive is not a ZIP archive
-// apply plugin: 'com.github.johnrengelman.shadow'
-apply plugin: 'me.champeau.jmh'
+apply plugin: 'me.champeau.gradle.jmh'
 apply from: "$rootDir/gradle/publications.gradle"

 dependencies {
-	jmh 'org.openjdk.jmh:jmh-core:1.32'
-	jmh 'org.openjdk.jmh:jmh-generator-annprocess:1.32'
-	jmh 'net.sf.jopt-simple:jopt-simple'
+	jmh 'org.openjdk.jmh:jmh-core:1.23'
+	jmh 'org.openjdk.jmh:jmh-generator-annprocess:1.23'
+	jmh 'net.sf.jopt-simple:jopt-simple:4.6'
 }
-
 jmh {
 	duplicateClassesStrategy = DuplicatesStrategy.EXCLUDE
 }

-tasks.findByName("processJmhResources").configure {
-	duplicatesStrategy = DuplicatesStrategy.EXCLUDE
-}
-
-jmhJar {
-	// Uncomment the following for Shadow's Transformer support.
-	// mergeServiceFiles()
-	// append('META-INF/spring.handlers')
-	// append('META-INF/spring.schemas')
-	// append('META-INF/spring.tooling')
-	exclude 'LICENSE'
-	exclude 'THIRD-PARTY'
-	exclude 'META-INF/license.txt'
-	exclude 'META-INF/notice.txt'
-	exclude 'META-INF/DEPENDENCIES'
-	exclude 'META-INF/LICENSE*'
-	exclude 'META-INF/NOTICE'
-	exclude 'META-INF/THIRD-PARTY'
-}
-
 jar {
 	manifest.attributes["Implementation-Title"] = project.name
 	manifest.attributes["Implementation-Version"] = project.version
@@ -1,182 +0,0 @@
-/**
- * Apply the JVM Toolchain conventions
- * See https://docs.gradle.org/current/userguide/toolchains.html
- *
- * One can choose the toolchain to use for compiling the MAIN sources and/or compiling
- * and running the TEST sources. These options apply to Java, Kotlin and Groovy sources
- * when available.
- * {@code "./gradlew check -PmainToolchain=8 -PtestToolchain=11"} will use:
- * <ul>
- *     <li>a JDK8 toolchain for compiling the main SourceSet
- *     <li>a JDK11 toolchain for compiling and running the test SourceSet
- * </ul>
- *
- * By default, the build will fall back to using the current JDK and 1.8 language level for all sourceSets.
- *
- * Gradle will automatically detect JDK distributions in well-known locations.
- * The following command will list the detected JDKs on the host.
- * {@code
- * $ ./gradlew -q javaToolchains
- * }
- *
- * We can also configure ENV variables and let Gradle know about them:
- * {@code
- * $ echo JDK11
- * /opt/openjdk/java11
- * $ echo JDK15
- * /opt/openjdk/java15
- * $ ./gradlew -Porg.gradle.java.installations.fromEnv=JDK11,JDK15 check
- * }
- *
- * @author Brian Clozel
- * @author Sam Brannen
- */
-
-def mainToolchainConfigured() {
-	return project.hasProperty('mainToolchain') && project.mainToolchain
-}
-
-def testToolchainConfigured() {
-	return project.hasProperty('testToolchain') && project.testToolchain
-}
-
-def mainToolchainLanguageVersion() {
-	if (mainToolchainConfigured()) {
-		return JavaLanguageVersion.of(project.mainToolchain.toString())
-	}
-	return JavaLanguageVersion.of(8)
-}
-
-def testToolchainLanguageVersion() {
-	if (testToolchainConfigured()) {
-		return JavaLanguageVersion.of(project.testToolchain.toString())
-	}
-	return mainToolchainLanguageVersion()
-}
-
-plugins.withType(JavaPlugin) {
-	// Configure the Java Toolchain if the 'mainToolchain' is configured
-	if (mainToolchainConfigured()) {
-		java {
-			toolchain {
-				languageVersion = mainToolchainLanguageVersion()
-			}
-		}
-	}
-	else {
-		// Fallback to JDK8
-		java {
-			sourceCompatibility = JavaVersion.VERSION_1_8
-		}
-	}
-	// Configure a specific Java Toolchain for compiling and running tests if the 'testToolchain' property is defined
-	if (testToolchainConfigured()) {
-		def testLanguageVersion = testToolchainLanguageVersion()
-		tasks.withType(JavaCompile).matching { it.name.contains("Test") }.configureEach {
-			javaCompiler = javaToolchains.compilerFor {
-				languageVersion = testLanguageVersion
-			}
-		}
-		tasks.withType(Test).configureEach{
-			javaLauncher = javaToolchains.launcherFor {
-				languageVersion = testLanguageVersion
-			}
-		}
-	}
-}
-
-plugins.withType(GroovyPlugin) {
-	// Fallback to JDK8
-	if (!mainToolchainConfigured()) {
-		compileGroovy {
-			sourceCompatibility = JavaVersion.VERSION_1_8
-		}
-	}
-}
-
-pluginManager.withPlugin("kotlin") {
-	// Configure the Kotlin compiler if the 'mainToolchain' property is defined
-	if (mainToolchainConfigured()) {
-		def mainLanguageVersion = mainToolchainLanguageVersion()
-		def compiler = javaToolchains.compilerFor {
-			languageVersion = mainLanguageVersion
-		}
-		// See https://kotlinlang.org/docs/gradle.html#attributes-specific-for-jvm
-		def javaVersion = mainLanguageVersion.toString() == '8' ? '1.8' : mainLanguageVersion.toString()
-		compileKotlin {
-			kotlinOptions {
-				jvmTarget = javaVersion
-				jdkHome = compiler.get().metadata.installationPath.asFile.absolutePath
-			}
-		}
-		// Compile the test classes with the same version, 'testToolchain' will override if defined
-		compileTestKotlin {
-			kotlinOptions {
-				jvmTarget = javaVersion
-				jdkHome = compiler.get().metadata.installationPath.asFile.absolutePath
-			}
-		}
-	}
-	else {
-		// Fallback to JDK8
-		compileKotlin {
-			kotlinOptions {
-				jvmTarget = '1.8'
-			}
-		}
-		compileTestKotlin {
-			kotlinOptions {
-				jvmTarget = '1.8'
-			}
-		}
-	}
-
-	if (testToolchainConfigured()) {
-		def testLanguageVersion = testToolchainLanguageVersion()
-		def compiler = javaToolchains.compilerFor {
-			languageVersion = testLanguageVersion
-		}
-		// See https://kotlinlang.org/docs/gradle.html#attributes-specific-for-jvm
-		def javaVersion = testLanguageVersion.toString() == '8' ? '1.8' : testLanguageVersion.toString()
-		compileTestKotlin {
-			kotlinOptions {
-				jvmTarget = javaVersion
-				jdkHome = compiler.get().metadata.installationPath.asFile.absolutePath
-			}
-		}
-	}
-}
-
-// Configure the JMH plugin to use the toolchain for generating and running JMH bytecode
-pluginManager.withPlugin("me.champeau.jmh") {
-	if (mainToolchainConfigured() || testToolchainConfigured()) {
-		tasks.matching { it.name.contains('jmh') && it.hasProperty('javaLauncher') }.configureEach {
-			javaLauncher.set(javaToolchains.launcherFor {
-				languageVersion.set(testToolchainLanguageVersion())
-			})
-		}
-		tasks.withType(JavaCompile).matching { it.name.contains("Jmh") }.configureEach {
-			javaCompiler = javaToolchains.compilerFor {
-				languageVersion = testToolchainLanguageVersion()
-			}
-		}
-	}
-}
-
-// Store resolved Toolchain JVM information as custom values in the build scan.
-rootProject.ext {
-	resolvedMainToolchain = false
-	resolvedTestToolchain = false
-}
-gradle.taskGraph.afterTask { Task task, TaskState state ->
-	if (mainToolchainConfigured() && !resolvedMainToolchain && task instanceof JavaCompile && task.javaCompiler.isPresent()) {
-		def metadata = task.javaCompiler.get().metadata
-		task.project.buildScan.value('Main toolchain', "$metadata.vendor $metadata.languageVersion ($metadata.installationPath)")
-		resolvedMainToolchain = true
-	}
-	if (testToolchainConfigured() && !resolvedTestToolchain && task instanceof Test && task.javaLauncher.isPresent()) {
-		def metadata = task.javaLauncher.get().metadata
-		task.project.buildScan.value('Test toolchain', "$metadata.vendor $metadata.languageVersion ($metadata.installationPath)")
-		resolvedTestToolchain = true
-	}
-}
@@ -1,5 +1,5 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-7.2-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-6.7-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
@@ -1,7 +1,7 @@
-#!/bin/sh
+#!/usr/bin/env sh

 #
-# Copyright © 2015-2021 the original authors.
+# Copyright 2015 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.
@@ -17,101 +17,67 @@
 #

 ##############################################################################
-#
-#   Gradle start up script for POSIX generated by Gradle.
-#
-#   Important for running:
-#
-#   (1) You need a POSIX-compliant shell to run this script. If your /bin/sh is
-#       noncompliant, but you have some other compliant shell such as ksh or
-#       bash, then to run this script, type that shell name before the whole
-#       command line, like:
-#
-#           ksh Gradle
-#
-#       Busybox and similar reduced shells will NOT work, because this script
-#       requires all of these POSIX shell features:
-#         * functions;
-#         * expansions «$var», «${var}», «${var:-default}», «${var+SET}»,
-#           «${var#prefix}», «${var%suffix}», and «$( cmd )»;
-#         * compound commands having a testable exit status, especially «case»;
-#         * various built-in commands including «command», «set», and «ulimit».
-#
-#   Important for patching:
-#
-#   (2) This script targets any POSIX shell, so it avoids extensions provided
-#       by Bash, Ksh, etc; in particular arrays are avoided.
-#
-#       The "traditional" practice of packing multiple parameters into a
-#       space-separated string is a well documented source of bugs and security
-#       problems, so this is (mostly) avoided, by progressively accumulating
-#       options in "$@", and eventually passing that to Java.
-#
-#       Where the inherited environment variables (DEFAULT_JVM_OPTS, JAVA_OPTS,
-#       and GRADLE_OPTS) rely on word-splitting, this is performed explicitly;
-#       see the in-line comments for details.
-#
-#       There are tweaks for specific operating systems such as AIX, CygWin,
-#       Darwin, MinGW, and NonStop.
-#
-#   (3) This script is generated from the Groovy template
-#       https://github.com/gradle/gradle/blob/master/subprojects/plugins/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
-#       within the Gradle project.
-#
-#       You can find Gradle at https://github.com/gradle/gradle/.
-#
+##
+##  Gradle start up script for UN*X
+##
 ##############################################################################

 # Attempt to set APP_HOME
-
 # Resolve links: $0 may be a link
-app_path=$0
-
-# Need this for daisy-chained symlinks.
-while
-    APP_HOME=${app_path%"${app_path##*/}"}  # leaves a trailing /; empty if no leading path
-    [ -h "$app_path" ]
-do
-    ls=$( ls -ld "$app_path" )
-    link=${ls#*' -> '}
-    case $link in             #(
-      /*)   app_path=$link ;; #(
-      *)    app_path=$APP_HOME$link ;;
-    esac
+PRG="$0"
+# Need this for relative symlinks.
+while [ -h "$PRG" ] ; do
+    ls=`ls -ld "$PRG"`
+    link=`expr "$ls" : '.*-> \(.*\)$'`
+    if expr "$link" : '/.*' > /dev/null; then
+        PRG="$link"
+    else
+        PRG=`dirname "$PRG"`"/$link"
+    fi
 done
-
-APP_HOME=$( cd "${APP_HOME:-./}" && pwd -P ) || exit
+SAVED="`pwd`"
+cd "`dirname \"$PRG\"`/" >/dev/null
+APP_HOME="`pwd -P`"
+cd "$SAVED" >/dev/null

 APP_NAME="Gradle"
-APP_BASE_NAME=${0##*/}
+APP_BASE_NAME=`basename "$0"`

 # Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
 DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'

 # Use the maximum available, or set MAX_FD != -1 to use that value.
-MAX_FD=maximum
+MAX_FD="maximum"

 warn () {
    echo "$*"
-} >&2
+}

 die () {
    echo
    echo "$*"
    echo
    exit 1
-} >&2
+}

 # OS specific support (must be 'true' or 'false').
 cygwin=false
 msys=false
 darwin=false
 nonstop=false
-case "$( uname )" in                #(
-  CYGWIN* )         cygwin=true  ;; #(
-  Darwin* )         darwin=true  ;; #(
-  MSYS* | MINGW* )  msys=true    ;; #(
-  NONSTOP* )        nonstop=true ;;
+case "`uname`" in
+  CYGWIN* )
+    cygwin=true
+    ;;
+  Darwin* )
+    darwin=true
+    ;;
+  MINGW* )
+    msys=true
+    ;;
+  NONSTOP* )
+    nonstop=true
+    ;;
 esac

 CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
@@ -121,9 +87,9 @@ CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
 if [ -n "$JAVA_HOME" ] ; then
    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
        # IBM's JDK on AIX uses strange locations for the executables
-        JAVACMD=$JAVA_HOME/jre/sh/java
+        JAVACMD="$JAVA_HOME/jre/sh/java"
    else
-        JAVACMD=$JAVA_HOME/bin/java
+        JAVACMD="$JAVA_HOME/bin/java"
    fi
    if [ ! -x "$JAVACMD" ] ; then
        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
@@ -132,7 +98,7 @@ Please set the JAVA_HOME variable in your environment to match the
 location of your Java installation."
    fi
 else
-    JAVACMD=java
+    JAVACMD="java"
    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.

 Please set the JAVA_HOME variable in your environment to match the
@@ -140,95 +106,80 @@ location of your Java installation."
 fi

 # Increase the maximum file descriptors if we can.
-if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
-    case $MAX_FD in #(
-      max*)
-        MAX_FD=$( ulimit -H -n ) ||
-            warn "Could not query maximum file descriptor limit"
-    esac
-    case $MAX_FD in  #(
-      '' | soft) :;; #(
-      *)
-        ulimit -n "$MAX_FD" ||
-            warn "Could not set maximum file descriptor limit to $MAX_FD"
-    esac
+if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then
+    MAX_FD_LIMIT=`ulimit -H -n`
+    if [ $? -eq 0 ] ; then
+        if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
+            MAX_FD="$MAX_FD_LIMIT"
+        fi
+        ulimit -n $MAX_FD
+        if [ $? -ne 0 ] ; then
+            warn "Could not set maximum file descriptor limit: $MAX_FD"
+        fi
+    else
+        warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
+    fi
 fi

-# Collect all arguments for the java command, stacking in reverse order:
-#   * args from the command line
-#   * the main class name
-#   * -classpath
-#   * -D...appname settings
-#   * --module-path (only if needed)
-#   * DEFAULT_JVM_OPTS, JAVA_OPTS, and GRADLE_OPTS environment variables.
+# For Darwin, add options to specify how the application appears in the dock
+if $darwin; then
+    GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
+fi

 # For Cygwin or MSYS, switch paths to Windows format before running java
-if "$cygwin" || "$msys" ; then
-    APP_HOME=$( cygpath --path --mixed "$APP_HOME" )
-    CLASSPATH=$( cygpath --path --mixed "$CLASSPATH" )
+if [ "$cygwin" = "true" -o "$msys" = "true" ] ; then
+    APP_HOME=`cygpath --path --mixed "$APP_HOME"`
+    CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`

-    JAVACMD=$( cygpath --unix "$JAVACMD" )
+    JAVACMD=`cygpath --unix "$JAVACMD"`

-    # Now convert the arguments - kludge to limit ourselves to /bin/sh
-    for arg do
-        if
-            case $arg in                                #(
-              -*)   false ;;                            # don't mess with options #(
-              /?*)  t=${arg#/} t=/${t%%/*}              # looks like a POSIX filepath
-                    [ -e "$t" ] ;;                      #(
-              *)    false ;;
-            esac
-        then
-            arg=$( cygpath --path --ignore --mixed "$arg" )
-        fi
-        # Roll the args list around exactly as many times as the number of
-        # args, so each arg winds up back in the position where it started, but
-        # possibly modified.
-        #
-        # NB: a `for` loop captures its iteration list before it begins, so
-        # changing the positional parameters here affects neither the number of
-        # iterations, nor the values presented in `arg`.
-        shift                   # remove old arg
-        set -- "$@" "$arg"      # push replacement arg
+    # We build the pattern for arguments to be converted via cygpath
+    ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
+    SEP=""
+    for dir in $ROOTDIRSRAW ; do
+        ROOTDIRS="$ROOTDIRS$SEP$dir"
+        SEP="|"
    done
+    OURCYGPATTERN="(^($ROOTDIRS))"
+    # Add a user-defined pattern to the cygpath arguments
+    if [ "$GRADLE_CYGPATTERN" != "" ] ; then
+        OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
+    fi
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    i=0
+    for arg in "$@" ; do
+        CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
+        CHECK2=`echo "$arg"|egrep -c "^-"`                                 ### Determine if an option
+
+        if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then                    ### Added a condition
+            eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
+        else
+            eval `echo args$i`="\"$arg\""
+        fi
+        i=`expr $i + 1`
+    done
+    case $i in
+        0) set -- ;;
+        1) set -- "$args0" ;;
+        2) set -- "$args0" "$args1" ;;
+        3) set -- "$args0" "$args1" "$args2" ;;
+        4) set -- "$args0" "$args1" "$args2" "$args3" ;;
+        5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
+        6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
+        7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
+        8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
+        9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
+    esac
 fi

-# Collect all arguments for the java command;
-#   * $DEFAULT_JVM_OPTS, $JAVA_OPTS, and $GRADLE_OPTS can contain fragments of
-#     shell script including quotes and variable substitutions, so put them in
-#     double quotes to make sure that they get re-expanded; and
-#   * put everything else in single quotes, so that it's not re-expanded.
+# Escape application args
+save () {
+    for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done
+    echo " "
+}
+APP_ARGS=`save "$@"`

-set -- \
-        "-Dorg.gradle.appname=$APP_BASE_NAME" \
-        -classpath "$CLASSPATH" \
-        org.gradle.wrapper.GradleWrapperMain \
-        "$@"
-
-# Use "xargs" to parse quoted args.
-#
-# With -n1 it outputs one arg per line, with the quotes and backslashes removed.
-#
-# In Bash we could simply go:
-#
-#   readarray ARGS < <( xargs -n1 <<<"$var" ) &&
-#   set -- "${ARGS[@]}" "$@"
-#
-# but POSIX shell has neither arrays nor command substitution, so instead we
-# post-process each arg (as a line of input to sed) to backslash-escape any
-# character that might be a shell metacharacter, then use eval to reverse
-# that process (while maintaining the separation between arguments), and wrap
-# the whole thing up as a single "set" statement.
-#
-# This will of course break if any of these variables contains a newline or
-# an unmatched quote.
-#
-
-eval "set -- $(
-        printf '%s\n' "$DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS" |
-        xargs -n1 |
-        sed ' s~[^-[:alnum:]+,./:=@_]~\\&~g; ' |
-        tr '\n' ' '
-    )" '"$@"'
+# Collect all arguments for the java command, following the shell quoting and substitution rules
+eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS"

 exec "$JAVACMD" "$@"
@@ -3,11 +3,11 @@
 This document will guide you through the process of importing the Spring Framework
 projects into Eclipse or the Spring Tool Suite (_STS_). It is recommended that you
 have a recent version of Eclipse. As a bare minimum you will need Eclipse with full Java
-8 support, Eclipse Buildship, and the Groovy plugin.
+8 support, Eclipse Buildship, the Kotlin plugin, and the Groovy plugin.

-The following instructions have been tested against [STS](https://spring.io/tools) 4.12.0
-([download](https://github.com/spring-projects/sts4/wiki/Previous-Versions#spring-tools-4120-changelog))
-(based on Eclipse 4.21) with [Eclipse Buildship](https://projects.eclipse.org/projects/tools.buildship).
+The following instructions have been tested against [STS](https://spring.io/tools) 4.3.2
+([download](https://github.com/spring-projects/sts4/wiki/Previous-Versions#spring-tools-432-changelog))
+(based on Eclipse 4.12) with [Eclipse Buildship](https://projects.eclipse.org/projects/tools.buildship).
 The instructions should work with the latest Eclipse distribution as long as you install
 [Buildship](https://marketplace.eclipse.org/content/buildship-gradle-integration). Note
 that STS 4 comes with Buildship preinstalled.
@@ -16,32 +16,28 @@ that STS 4 comes with Buildship preinstalled.

 _When instructed to execute `./gradlew` from the command line, be sure to execute it within your locally cloned `spring-framework` working directory._

-1. Install the [Groovy Development Tools](https://marketplace.eclipse.org/content/groovy-development-tools).
-1. Switch to Groovy 3.0 in Eclipse (Preferences &#8594; Groovy &#8594; Compiler &#8594; Switch to 3.0...).
-   - If you encounter build errors stating something similar to _"Groovy: compiler mismatch: project level is 2.5, workspace level is 3.0"_, change the Groovy compiler version to 3.0 for each affected project.
-1. Ensure that the _Forbidden reference (access rule)_ in Eclipse is set to `Info`
-(Preferences &#8594; Java &#8594; Compiler &#8594; Errors/Warnings &#8594; Deprecated and restricted API &#8594; Forbidden reference (access rule)).
-1. Optionally install the [Kotlin Plugin for Eclipse](https://marketplace.eclipse.org/content/kotlin-plugin-eclipse) if you need to execute Kotlin-based tests or develop Kotlin extensions.
-   - **NOTE**: As of September 21, 2021, it appears that the Kotlin Plugin for Eclipse does not yet work with Eclipse 4.21.
-1. Optionally install the [AspectJ Development Tools](https://marketplace.eclipse.org/content/aspectj-development-tools) (_AJDT_) if you need to work with the `spring-aspects` project.
-   - **NOTE**: As of September 21, 2021, it appears that the AspectJ Development Tools do not yet work with Eclipse 4.21.
-1. Optionally install the [TestNG plugin](https://testng.org/doc/eclipse.html) in Eclipse if you need to execute individual TestNG test classes or tests in the `spring-test` module.
-   - As an alternative to installing the TestNG plugin, you can execute the `org.springframework.test.context.testng.TestNGTestSuite` class as a "JUnit 5" test class in Eclipse.
+1. Ensure that Eclipse launches with JDK 8.
+   - For example, on Mac OS this can be configured in the `Info.plist` file located in the `Contents` folder of the installed Eclipse or STS application (e.g., the `Eclipse.app` file).
+1. Install the [Kotlin Plugin for Eclipse](https://marketplace.eclipse.org/content/kotlin-plugin-eclipse) in Eclipse.
+1. Install the [Eclipse Groovy Development Tools](https://github.com/groovy/groovy-eclipse/wiki) in Eclipse.
+1. Switch to Groovy 2.5 (Preferences -> Groovy -> Compiler -> Switch to 2.5...) in Eclipse.
+1. Change the _Forbidden reference (access rule)_ in Eclipse from Error to Warning
+(Preferences -> Java -> Compiler -> Errors/Warnings -> Deprecated and restricted API -> Forbidden reference (access rule)).
+1. Optionally install the [AspectJ Development Tools](https://marketplace.eclipse.org/content/aspectj-development-tools) (_AJDT_) if you need to work with the `spring-aspects` project. The AspectJ Development Tools available in the Eclipse Marketplace have been tested with these instructions using STS 4.5 (Eclipse 4.14).
+1. Optionally install the [TestNG plugin](https://testng.org/doc/eclipse.html) in Eclipse if you need to execute TestNG tests in the `spring-test` module.
 1. Build `spring-oxm` from the command line with `./gradlew :spring-oxm:check`.
-1. To apply Spring Framework specific settings, run `./gradlew cleanEclipse eclipse` from the command line.
-1. Import all projects into Eclipse (File &#8594; Import &#8594; Gradle &#8594; Existing Gradle Project &#8594; Navigate to the locally cloned `spring-framework` directory &#8594; Select Finish).
+1. To apply project specific settings, run `./gradlew eclipseBuildship` from the command line.
+1. Import into Eclipse (File -> Import -> Gradle -> Existing Gradle Project -> Navigate to the locally cloned `spring-framework` directory -> Select Finish).
   - If you have not installed AJDT, exclude the `spring-aspects` project from the import, if prompted, or close it after the import.
-   - If you run into errors during the import, you may need to set the _Java home_ for Gradle Buildship to the location of your JDK 8 installation in Eclipse (Preferences &#8594; Gradle &#8594; Java home).
-1. If you need to execute JAXB-related tests in the `spring-oxm` project and wish to have the generated sources available, add the `build/generated-sources/jaxb` folder to the build path (right click on the `jaxb` folder and select "Build Path &#8594; Use as Source Folder").
-   - If you do not see the `build` folder in the `spring-oxm` project, ensure that the "Gradle build folder" is not filtered out from the view. This setting is available under "Filters" in the configuration of the Package Explorer (available by clicking on the _three vertical dots_ in the upper right corner of the Package Explorer).
+   - If you run into errors during the import, you may need to set the _Java home_ for Gradle Buildship to the location of your JDK 8 installation in Eclipse (Preferences -> Gradle -> Java home).
+1. If you need to execute JAXB-related tests in the `spring-oxm` project and wish to have the generated sources available, add the `build/generated-sources/jaxb` folder to the build path (right click on the `jaxb` folder and select `Build Path -> Use as Source Folder`).
+   - If you do not see the `build` folder in the `spring-oxm` project, ensure that the "Gradle build folder" is not filtered out from the view. This setting is available under "Filters" in the configuration of the Package Explorer (available by clicking on the small downward facing arrow in the upper right corner of the Package Explorer).
 1. Code away!

 ## Known Issues

-1. `spring-core` should be pre-compiled due to repackaged dependencies.
-   - See `*RepackJar` tasks in the `spring-core.gradle` build file.
-1. `spring-oxm` should be pre-compiled due to JAXB types generated for tests.
-   - Note that executing `./gradlew :spring-oxm:check` as explained in the _Steps_ above will compile `spring-core` and generate JAXB types for `spring-oxm`.
+1. `spring-core` and `spring-oxm` should be pre-compiled due to repackaged dependencies.
+   - See `*RepackJar` tasks in the build.
 1. `spring-aspects` does not compile due to references to aspect types unknown to Eclipse.
   - If you installed _AJDT_ into Eclipse it should work.
 1. While JUnit tests pass from the command line with Gradle, some may fail when run from
@@ -1,26 +1,26 @@
 description = "Spring Integration Tests"

 dependencies {
-	testImplementation(project(":spring-aop"))
-	testImplementation(project(":spring-beans"))
-	testImplementation(project(":spring-context"))
-	testImplementation(project(":spring-core"))
-	testImplementation(testFixtures(project(":spring-aop")))
-	testImplementation(testFixtures(project(":spring-beans")))
-	testImplementation(testFixtures(project(":spring-core")))
-	testImplementation(testFixtures(project(":spring-tx")))
-	testImplementation(project(":spring-expression"))
-	testImplementation(project(":spring-jdbc"))
-	testImplementation(project(":spring-orm"))
-	testImplementation(project(":spring-test"))
-	testImplementation(project(":spring-tx"))
-	testImplementation(project(":spring-web"))
-	testImplementation("javax.inject:javax.inject")
-	testImplementation("javax.resource:javax.resource-api")
-	testImplementation("javax.servlet:javax.servlet-api")
-	testImplementation("org.aspectj:aspectjweaver")
-	testImplementation("org.hsqldb:hsqldb")
-	testImplementation("org.hibernate:hibernate-core")
+	testCompile(project(":spring-aop"))
+	testCompile(project(":spring-beans"))
+	testCompile(project(":spring-context"))
+	testCompile(project(":spring-core"))
+	testCompile(testFixtures(project(":spring-aop")))
+	testCompile(testFixtures(project(":spring-beans")))
+	testCompile(testFixtures(project(":spring-core")))
+	testCompile(testFixtures(project(":spring-tx")))
+	testCompile(project(":spring-expression"))
+	testCompile(project(":spring-jdbc"))
+	testCompile(project(":spring-orm"))
+	testCompile(project(":spring-test"))
+	testCompile(project(":spring-tx"))
+	testCompile(project(":spring-web"))
+	testCompile("javax.inject:javax.inject")
+	testCompile("javax.resource:javax.resource-api")
+	testCompile("javax.servlet:javax.servlet-api")
+	testCompile("org.aspectj:aspectjweaver")
+	testCompile("org.hsqldb:hsqldb")
+	testCompile("org.hibernate:hibernate-core")
 }

 normalization {
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2022 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.
@@ -74,7 +74,7 @@ class ScheduledAndTransactionalAnnotationIntegrationTests {

 		MyRepository repository = ctx.getBean(MyRepository.class);
 		CallCountingTransactionManager txManager = ctx.getBean(CallCountingTransactionManager.class);
-		assertThat(AopUtils.isCglibProxy(repository)).isTrue();
+		assertThat(AopUtils.isCglibProxy(repository)).isEqualTo(true);
 		assertThat(repository.getInvocationCount()).isGreaterThan(0);
 		assertThat(txManager.commits).isGreaterThan(0);
 	}
@@ -1,13 +1,13 @@
 pluginManagement {
 	repositories {
 		gradlePluginPortal()
-		maven { url "https://repo.spring.io/plugins-release" }
+		maven { url 'https://repo.spring.io/plugins-release' }
 	}
 }

 plugins {
-	id "com.gradle.enterprise" version "3.7.2"
-	id "io.spring.ge.conventions" version "0.0.7"
+	id "com.gradle.enterprise" version "3.2"
+	id "io.spring.gradle-enterprise-conventions" version "0.0.2"
 }

 include "spring-aop"
@@ -17,6 +17,8 @@ include "spring-context"
 include "spring-context-indexer"
 include "spring-context-support"
 include "spring-core"
+include "kotlin-coroutines"
+project(':kotlin-coroutines').projectDir = file('spring-core/kotlin-coroutines')
 include "spring-expression"
 include "spring-instrument"
 include "spring-jcl"
@@ -43,13 +45,19 @@ rootProject.children.each {project ->
 settings.gradle.projectsLoaded {
 	gradleEnterprise {
 		buildScan {
+			if (settings.gradle.rootProject.hasProperty('customJavaHome')) {
+				value("Custom JAVA_HOME", settings.gradle.rootProject.getProperty('customJavaHome'))
+			}
+			if (settings.gradle.rootProject.hasProperty('customJavaSourceVersion')) {
+				value("Custom Java Source Version", settings.gradle.rootProject.getProperty('customJavaSourceVersion'))
+			}
 			File buildDir = settings.gradle.rootProject.getBuildDir()
 			buildDir.mkdirs()
 			new File(buildDir, "build-scan-uri.txt").text = "(build scan not generated)"
 			buildScanPublished { scan ->
 				if (buildDir.exists()) {
 					new File(buildDir, "build-scan-uri.txt").text = "${scan.buildScanUri}\n"
-				}
+				} 
 			}
 		}
 	}
@@ -1,13 +1,12 @@
 description = "Spring AOP"

 dependencies {
-	api(project(":spring-beans"))
-	api(project(":spring-core"))
+	compile(project(":spring-beans"))
+	compile(project(":spring-core"))
 	optional("org.aspectj:aspectjweaver")
 	optional("org.apache.commons:commons-pool2")
 	optional("com.jamonapi:jamon")
-	testImplementation(testFixtures(project(":spring-beans")))
-	testImplementation(testFixtures(project(":spring-core")))
-	testFixturesImplementation(testFixtures(project(":spring-beans")))
+	testCompile(testFixtures(project(":spring-beans")))
+	testCompile(testFixtures(project(":spring-core")))
 	testFixturesImplementation(testFixtures(project(":spring-core")))
 }
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2021 the original author or authors.
+ * Copyright 2002-2016 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.
@@ -26,7 +26,7 @@ import javax.annotation.Nullable;
 * terminology).
 *
 * <p>A runtime joinpoint is an <i>event</i> that occurs on a static
- * joinpoint (i.e. a location in a program). For instance, an
+ * joinpoint (i.e. a location in a the program). For instance, an
 * invocation is the runtime joinpoint on a method (static joinpoint).
 * The static part of a given joinpoint can be generically retrieved
 * using the {@link #getStaticPart()} method.
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2021 the original author or authors.
+ * Copyright 2002-2012 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.
@@ -26,7 +26,7 @@ import org.aopalliance.aop.Advice;
 * <p>Introductions are often <b>mixins</b>, enabling the building of composite
 * objects that can achieve many of the goals of multiple inheritance in Java.
 *
- * <p>Compared to {@link IntroductionInfo}, this interface allows an advice to
+ * <p>Compared to {qlink IntroductionInfo}, this interface allows an advice to
 * implement a range of interfaces that is not necessarily known in advance.
 * Thus an {@link IntroductionAdvisor} can be used to specify which interfaces
 * will be exposed in an advised object.
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2020 the original author or authors.
+ * Copyright 2002-2019 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.
@@ -350,8 +350,17 @@ public abstract class AbstractAspectJAdvice implements Advice, AspectJPrecedence
 		return this.discoveredThrowingType;
 	}

-	private static boolean isVariableName(String name) {
-		return AspectJProxyUtils.isVariableName(name);
+	private boolean isVariableName(String name) {
+		char[] chars = name.toCharArray();
+		if (!Character.isJavaIdentifierStart(chars[0])) {
+			return false;
+		}
+		for (int i = 1; i < chars.length; i++) {
+			if (!Character.isJavaIdentifierPart(chars[i])) {
+				return false;
+			}
+		}
+		return true;
 	}


@@ -631,6 +640,7 @@ public abstract class AbstractAspectJAdvice implements Advice, AspectJPrecedence
 		}
 		try {
 			ReflectionUtils.makeAccessible(this.aspectJAdviceMethod);
+			// TODO AopUtils.invokeJoinpointUsingReflection
 			return this.aspectJAdviceMethod.invoke(this.aspectInstanceFactory.getAspectInstance(), actualArgs);
 		}
 		catch (IllegalArgumentException ex) {
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2021 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.
@@ -470,10 +470,22 @@ public class AspectJAdviceParameterNameDiscoverer implements ParameterNameDiscov
 	 */
 	@Nullable
 	private String maybeExtractVariableName(@Nullable String candidateToken) {
-		if (AspectJProxyUtils.isVariableName(candidateToken)) {
+		if (!StringUtils.hasLength(candidateToken)) {
+			return null;
+		}
+		if (Character.isJavaIdentifierStart(candidateToken.charAt(0)) &&
+				Character.isLowerCase(candidateToken.charAt(0))) {
+			char[] tokenChars = candidateToken.toCharArray();
+			for (char tokenChar : tokenChars) {
+				if (!Character.isJavaIdentifierPart(tokenChar)) {
+					return null;
+				}
+			}
 			return candidateToken;
 		}
-		return null;
+		else {
+			return null;
+		}
 	}

 	/**
@@ -625,7 +637,7 @@ public class AspectJAdviceParameterNameDiscoverer implements ParameterNameDiscov
 			StringBuilder sb = new StringBuilder();
 			if (bodyStart >= 0 && bodyStart != (currentToken.length() - 1)) {
 				sb.append(currentToken.substring(bodyStart + 1));
-				sb.append(' ');
+				sb.append(" ");
 			}
 			numTokensConsumed++;
 			int currentIndex = startIndex + numTokensConsumed;
@@ -645,7 +657,7 @@ public class AspectJAdviceParameterNameDiscoverer implements ParameterNameDiscov
 					toAppend = toAppend.substring(1);
 				}
 				sb.append(toAppend);
-				sb.append(' ');
+				sb.append(" ");
 				currentIndex++;
 				numTokensConsumed++;
 			}
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2021 the original author or authors.
+ * Copyright 2002-2018 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.
@@ -547,7 +547,7 @@ public class AspectJExpressionPointcut extends AbstractExpressionPointcut
 		StringBuilder sb = new StringBuilder("AspectJExpressionPointcut: (");
 		for (int i = 0; i < this.pointcutParameterTypes.length; i++) {
 			sb.append(this.pointcutParameterTypes[i].getName());
-			sb.append(' ');
+			sb.append(" ");
 			sb.append(this.pointcutParameterNames[i]);
 			if ((i+1) < this.pointcutParameterTypes.length) {
 				sb.append(", ");
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2020 the original author or authors.
+ * Copyright 2002-2019 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.
@@ -21,8 +21,6 @@ import java.util.List;
 import org.springframework.aop.Advisor;
 import org.springframework.aop.PointcutAdvisor;
 import org.springframework.aop.interceptor.ExposeInvocationInterceptor;
-import org.springframework.lang.Nullable;
-import org.springframework.util.StringUtils;

 /**
 * Utility methods for working with AspectJ proxies.
@@ -75,19 +73,4 @@ public abstract class AspectJProxyUtils {
 						((PointcutAdvisor) advisor).getPointcut() instanceof AspectJExpressionPointcut));
 	}

-	static boolean isVariableName(@Nullable String name) {
-		if (!StringUtils.hasLength(name)) {
-			return false;
-		}
-		if (!Character.isJavaIdentifierStart(name.charAt(0))) {
-			return false;
-		}
-		for (int i = 1; i < name.length(); i++) {
-			if (!Character.isJavaIdentifierPart(name.charAt(i))) {
-				return false;
-			}
-		}
-		return true;
-	}
-
 }
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2021 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.
@@ -221,12 +221,10 @@ public class MethodInvocationProceedingJoinPoint implements ProceedingJoinPoint,
 		@Override
 		@Nullable
 		public String[] getParameterNames() {
-			String[] parameterNames = this.parameterNames;
-			if (parameterNames == null) {
-				parameterNames = parameterNameDiscoverer.getParameterNames(getMethod());
-				this.parameterNames = parameterNames;
+			if (this.parameterNames == null) {
+				this.parameterNames = parameterNameDiscoverer.getParameterNames(getMethod());
 			}
-			return parameterNames;
+			return this.parameterNames;
 		}

 		@Override
@@ -255,19 +253,19 @@ public class MethodInvocationProceedingJoinPoint implements ProceedingJoinPoint,
 			StringBuilder sb = new StringBuilder();
 			if (includeModifier) {
 				sb.append(Modifier.toString(getModifiers()));
-				sb.append(' ');
+				sb.append(" ");
 			}
 			if (includeReturnTypeAndArgs) {
 				appendType(sb, getReturnType(), useLongReturnAndArgumentTypeName);
-				sb.append(' ');
+				sb.append(" ");
 			}
 			appendType(sb, getDeclaringType(), useLongTypeName);
-			sb.append('.');
+			sb.append(".");
 			sb.append(getMethod().getName());
-			sb.append('(');
+			sb.append("(");
 			Class<?>[] parametersTypes = getParameterTypes();
 			appendTypes(sb, parametersTypes, includeReturnTypeAndArgs, useLongReturnAndArgumentTypeName);
-			sb.append(')');
+			sb.append(")");
 			return sb.toString();
 		}

@@ -278,7 +276,7 @@ public class MethodInvocationProceedingJoinPoint implements ProceedingJoinPoint,
 				for (int size = types.length, i = 0; i < size; i++) {
 					appendType(sb, types[i], useLongReturnAndArgumentTypeName);
 					if (i < size - 1) {
-						sb.append(',');
+						sb.append(",");
 					}
 				}
 			}
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2021 the original author or authors.
+ * Copyright 2002-2018 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.
@@ -103,11 +103,10 @@ public abstract class AbstractAspectJAdvisorFactory implements AspectJAdvisorFac
 	@Override
 	public void validate(Class<?> aspectClass) throws AopConfigException {
 		// If the parent has the annotation and isn't abstract it's an error
-		Class<?> superclass = aspectClass.getSuperclass();
-		if (superclass.getAnnotation(Aspect.class) != null &&
-				!Modifier.isAbstract(superclass.getModifiers())) {
+		if (aspectClass.getSuperclass().getAnnotation(Aspect.class) != null &&
+				!Modifier.isAbstract(aspectClass.getSuperclass().getModifiers())) {
 			throw new AopConfigException("[" + aspectClass.getName() + "] cannot extend concrete aspect [" +
-					superclass.getName() + "]");
+					aspectClass.getSuperclass().getName() + "]");
 		}

 		AjType<?> ajType = AjTypeSystem.getAjType(aspectClass);
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2020 the original author or authors.
+ * Copyright 2002-2018 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.
@@ -160,12 +160,23 @@ public class AspectJProxyFactory extends ProxyCreatorSupport {
 	}

 	/**
-	 * Get the singleton aspect instance for the supplied aspect type.
-	 * An instance is created if one cannot be found in the instance cache.
+	 * Get the singleton aspect instance for the supplied aspect type. An instance
+	 * is created if one cannot be found in the instance cache.
 	 */
 	private Object getSingletonAspectInstance(Class<?> aspectClass) {
-		return aspectCache.computeIfAbsent(aspectClass,
-				clazz -> new SimpleAspectInstanceFactory(clazz).getAspectInstance());
+		// Quick check without a lock...
+		Object instance = aspectCache.get(aspectClass);
+		if (instance == null) {
+			synchronized (aspectCache) {
+				// To be safe, check within full lock now...
+				instance = aspectCache.get(aspectClass);
+				if (instance == null) {
+					instance = new SimpleAspectInstanceFactory(aspectClass).getAspectInstance();
+					aspectCache.put(aspectClass, instance);
+				}
+			}
+		}
+		return instance;
 	}


@@ -51,7 +51,6 @@ import org.springframework.core.convert.converter.Converter;
 import org.springframework.core.convert.converter.ConvertingComparator;
 import org.springframework.lang.Nullable;
 import org.springframework.util.ReflectionUtils;
-import org.springframework.util.ReflectionUtils.MethodFilter;
 import org.springframework.util.StringUtils;
 import org.springframework.util.comparator.InstanceComparator;

@@ -71,11 +70,7 @@ import org.springframework.util.comparator.InstanceComparator;
@SuppressWarnings("serial")
 public class ReflectiveAspectJAdvisorFactory extends AbstractAspectJAdvisorFactory implements Serializable {

-	// Exclude @Pointcut methods
-	private static final MethodFilter adviceMethodFilter = ReflectionUtils.USER_DECLARED_METHODS
-			.and(method -> (AnnotationUtils.getAnnotation(method, Pointcut.class) == null));
-
-	private static final Comparator<Method> adviceMethodComparator;
+	private static final Comparator<Method> METHOD_COMPARATOR;

 	static {
 		// Note: although @After is ordered before @AfterReturning and @AfterThrowing,
@@ -91,7 +86,7 @@ public class ReflectiveAspectJAdvisorFactory extends AbstractAspectJAdvisorFacto
 					return (ann != null ? ann.getAnnotation() : null);
 				});
 		Comparator<Method> methodNameComparator = new ConvertingComparator<>(Method::getName);
-		adviceMethodComparator = adviceKindComparator.thenComparing(methodNameComparator);
+		METHOD_COMPARATOR = adviceKindComparator.thenComparing(methodNameComparator);
 	}


@@ -165,10 +160,15 @@ public class ReflectiveAspectJAdvisorFactory extends AbstractAspectJAdvisorFacto
 	}

 	private List<Method> getAdvisorMethods(Class<?> aspectClass) {
-		List<Method> methods = new ArrayList<>();
-		ReflectionUtils.doWithMethods(aspectClass, methods::add, adviceMethodFilter);
+		final List<Method> methods = new ArrayList<>();
+		ReflectionUtils.doWithMethods(aspectClass, method -> {
+			// Exclude pointcuts
+			if (AnnotationUtils.getAnnotation(method, Pointcut.class) == null) {
+				methods.add(method);
+			}
+		}, ReflectionUtils.USER_DECLARED_METHODS);
 		if (methods.size() > 1) {
-			methods.sort(adviceMethodComparator);
+			methods.sort(METHOD_COMPARATOR);
 		}
 		return methods;
 	}
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2021 the original author or authors.
+ * Copyright 2002-2018 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.
@@ -22,7 +22,6 @@ import java.util.concurrent.ConcurrentHashMap;
 import org.springframework.aop.Advisor;
 import org.springframework.aop.support.AopUtils;
 import org.springframework.beans.factory.config.BeanPostProcessor;
-import org.springframework.core.SmartClassLoader;
 import org.springframework.lang.Nullable;

 /**
@@ -90,13 +89,7 @@ public abstract class AbstractAdvisingBeanPostProcessor extends ProxyProcessorSu
 			}
 			proxyFactory.addAdvisor(this.advisor);
 			customizeProxyFactory(proxyFactory);
-
-			// Use original ClassLoader if bean class not locally loaded in overriding class loader
-			ClassLoader classLoader = getProxyClassLoader();
-			if (classLoader instanceof SmartClassLoader && classLoader != bean.getClass().getClassLoader()) {
-				classLoader = ((SmartClassLoader) classLoader).getOriginalClassLoader();
-			}
-			return proxyFactory.getProxy(classLoader);
+			return proxyFactory.getProxy(getProxyClassLoader());
 		}

 		// No proxy needed.
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2020 the original author or authors.
+ * Copyright 2002-2018 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.
@@ -114,15 +114,6 @@ public interface Advised extends TargetClassAware {
 	 */
 	Advisor[] getAdvisors();

-	/**
-	 * Return the number of advisors applying to this proxy.
-	 * <p>The default implementation delegates to {@code getAdvisors().length}.
-	 * @since 5.3.1
-	 */
-	default int getAdvisorCount() {
-		return getAdvisors().length;
-	}
-
 	/**
 	 * Add an advisor at the end of the advisor chain.
 	 * <p>The Advisor may be an {@link org.springframework.aop.IntroductionAdvisor},
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2020 the original author or authors.
+ * Copyright 2002-2019 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.
@@ -95,6 +95,12 @@ public class AdvisedSupport extends ProxyConfig implements Advised {
 	 */
 	private List<Advisor> advisors = new ArrayList<>();

+	/**
+	 * Array updated on changes to the advisors list, which is easier
+	 * to manipulate internally.
+	 */
+	private Advisor[] advisorArray = new Advisor[0];
+

 	/**
 	 * No-arg constructor for use as a JavaBean.
@@ -238,12 +244,7 @@ public class AdvisedSupport extends ProxyConfig implements Advised {

 	@Override
 	public final Advisor[] getAdvisors() {
-		return this.advisors.toArray(new Advisor[0]);
-	}
-
-	@Override
-	public int getAdvisorCount() {
-		return this.advisors.size();
+		return this.advisorArray;
 	}

 	@Override
@@ -291,6 +292,7 @@ public class AdvisedSupport extends ProxyConfig implements Advised {
 			}
 		}

+		updateAdvisorArray();
 		adviceChanged();
 	}

@@ -337,6 +339,7 @@ public class AdvisedSupport extends ProxyConfig implements Advised {
 				Assert.notNull(advisor, "Advisor must not be null");
 				this.advisors.add(advisor);
 			}
+			updateAdvisorArray();
 			adviceChanged();
 		}
 	}
@@ -360,18 +363,27 @@ public class AdvisedSupport extends ProxyConfig implements Advised {
 					"Illegal position " + pos + " in advisor list with size " + this.advisors.size());
 		}
 		this.advisors.add(pos, advisor);
+		updateAdvisorArray();
 		adviceChanged();
 	}

+	/**
+	 * Bring the array up to date with the list.
+	 */
+	protected final void updateAdvisorArray() {
+		this.advisorArray = this.advisors.toArray(new Advisor[0]);
+	}
+
 	/**
 	 * Allows uncontrolled access to the {@link List} of {@link Advisor Advisors}.
-	 * <p>Use with care, and remember to {@link #adviceChanged() fire advice changed events}
-	 * when making any modifications.
+	 * <p>Use with care, and remember to {@link #updateAdvisorArray() refresh the advisor array}
+	 * and {@link #adviceChanged() fire advice changed events} when making any modifications.
 	 */
 	protected final List<Advisor> getAdvisorsInternal() {
 		return this.advisors;
 	}

+
 	@Override
 	public void addAdvice(Advice advice) throws AopConfigException {
 		int pos = this.advisors.size();
@@ -509,6 +521,7 @@ public class AdvisedSupport extends ProxyConfig implements Advised {
 			Assert.notNull(advisor, "Advisor must not be null");
 			this.advisors.add(advisor);
 		}
+		updateAdvisorArray();
 		adviceChanged();
 	}

@@ -521,8 +534,9 @@ public class AdvisedSupport extends ProxyConfig implements Advised {
 		copy.copyFrom(this);
 		copy.targetSource = EmptyTargetSource.forClass(getTargetClass(), getTargetSource().isStatic());
 		copy.advisorChainFactory = this.advisorChainFactory;
-		copy.interfaces = new ArrayList<>(this.interfaces);
-		copy.advisors = new ArrayList<>(this.advisors);
+		copy.interfaces = this.interfaces;
+		copy.advisors = this.advisors;
+		copy.updateAdvisorArray();
 		return copy;
 	}

@@ -539,6 +553,7 @@ public class AdvisedSupport extends ProxyConfig implements Advised {
 		this.methodCache = new ConcurrentHashMap<>(32);
 	}

+
 	@Override
 	public String toProxyConfigString() {
 		return toString();
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2021 the original author or authors.
+ * Copyright 2002-2019 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.
@@ -19,9 +19,7 @@ package org.springframework.aop.framework;
 import java.lang.reflect.Array;
 import java.lang.reflect.Method;
 import java.lang.reflect.Proxy;
-import java.util.ArrayList;
 import java.util.Arrays;
-import java.util.List;

 import org.springframework.aop.SpringProxy;
 import org.springframework.aop.TargetClassAware;
@@ -31,9 +29,7 @@ import org.springframework.aop.target.SingletonTargetSource;
 import org.springframework.core.DecoratingProxy;
 import org.springframework.lang.Nullable;
 import org.springframework.util.Assert;
-import org.springframework.util.ClassUtils;
 import org.springframework.util.ObjectUtils;
-import org.springframework.util.ReflectionUtils;

 /**
 * Utility methods for AOP proxy factories.
@@ -48,11 +44,6 @@ import org.springframework.util.ReflectionUtils;
 */
 public abstract class AopProxyUtils {

-	// JDK 17 Class.isSealed() method available?
-	@Nullable
-	private static final Method isSealedMethod = ClassUtils.getMethodIfAvailable(Class.class, "isSealed");
-
-
 	/**
 	 * Obtain the singleton target object behind the given proxy, if any.
 	 * @param candidate the (potential) proxy to check
@@ -139,23 +130,34 @@ public abstract class AopProxyUtils {
 				specifiedInterfaces = advised.getProxiedInterfaces();
 			}
 		}
-		List<Class<?>> proxiedInterfaces = new ArrayList<>(specifiedInterfaces.length + 3);
-		for (Class<?> ifc : specifiedInterfaces) {
-			// Only non-sealed interfaces are actually eligible for JDK proxying (on JDK 17)
-			if (isSealedMethod == null || Boolean.FALSE.equals(ReflectionUtils.invokeMethod(isSealedMethod, ifc))) {
-				proxiedInterfaces.add(ifc);
-			}
+		boolean addSpringProxy = !advised.isInterfaceProxied(SpringProxy.class);
+		boolean addAdvised = !advised.isOpaque() && !advised.isInterfaceProxied(Advised.class);
+		boolean addDecoratingProxy = (decoratingProxy && !advised.isInterfaceProxied(DecoratingProxy.class));
+		int nonUserIfcCount = 0;
+		if (addSpringProxy) {
+			nonUserIfcCount++;
 		}
-		if (!advised.isInterfaceProxied(SpringProxy.class)) {
-			proxiedInterfaces.add(SpringProxy.class);
+		if (addAdvised) {
+			nonUserIfcCount++;
 		}
-		if (!advised.isOpaque() && !advised.isInterfaceProxied(Advised.class)) {
-			proxiedInterfaces.add(Advised.class);
+		if (addDecoratingProxy) {
+			nonUserIfcCount++;
 		}
-		if (decoratingProxy && !advised.isInterfaceProxied(DecoratingProxy.class)) {
-			proxiedInterfaces.add(DecoratingProxy.class);
+		Class<?>[] proxiedInterfaces = new Class<?>[specifiedInterfaces.length + nonUserIfcCount];
+		System.arraycopy(specifiedInterfaces, 0, proxiedInterfaces, 0, specifiedInterfaces.length);
+		int index = specifiedInterfaces.length;
+		if (addSpringProxy) {
+			proxiedInterfaces[index] = SpringProxy.class;
+			index++;
 		}
-		return ClassUtils.toClassArray(proxiedInterfaces);
+		if (addAdvised) {
+			proxiedInterfaces[index] = Advised.class;
+			index++;
+		}
+		if (addDecoratingProxy) {
+			proxiedInterfaces[index] = DecoratingProxy.class;
+		}
+		return proxiedInterfaces;
 	}

 	/**
@@ -204,7 +206,7 @@ public abstract class AopProxyUtils {
 	 * Check equality of the advisors behind the given AdvisedSupport objects.
 	 */
 	public static boolean equalsAdvisors(AdvisedSupport a, AdvisedSupport b) {
-		return a.getAdvisorCount() == b.getAdvisorCount() && Arrays.equals(a.getAdvisors(), b.getAdvisors());
+		return Arrays.equals(a.getAdvisors(), b.getAdvisors());
 	}


@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2021 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.
@@ -48,7 +48,6 @@ 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;
@@ -126,7 +125,7 @@ class CglibAopProxy implements AopProxy, Serializable {
 	 */
 	public CglibAopProxy(AdvisedSupport config) throws AopConfigException {
 		Assert.notNull(config, "AdvisedSupport must not be null");
-		if (config.getAdvisorCount() == 0 && config.getTargetSource() == AdvisedSupport.EMPTY_TARGET_SOURCE) {
+		if (config.getAdvisors().length == 0 && config.getTargetSource() == AdvisedSupport.EMPTY_TARGET_SOURCE) {
 			throw new AopConfigException("No advisors and no TargetSource specified");
 		}
 		this.advised = config;
@@ -237,7 +236,7 @@ class CglibAopProxy implements AopProxy, Serializable {
 	 * validates it if not.
 	 */
 	private void validateClassIfNecessary(Class<?> proxySuperClass, @Nullable ClassLoader proxyClassLoader) {
-		if (!this.advised.isOptimize() && logger.isInfoEnabled()) {
+		if (logger.isWarnEnabled()) {
 			synchronized (validatedClasses) {
 				if (!validatedClasses.containsKey(proxySuperClass)) {
 					doValidateClass(proxySuperClass, proxyClassLoader,
@@ -679,19 +678,13 @@ class CglibAopProxy implements AopProxy, Serializable {
 				Object retVal;
 				// Check whether we only have one InvokerInterceptor: that is,
 				// no real advice, but just reflective invocation of the target.
-				if (chain.isEmpty() && CglibMethodInvocation.isMethodProxyCompatible(method)) {
+				if (chain.isEmpty() && Modifier.isPublic(method.getModifiers())) {
 					// We can skip creating a MethodInvocation: just invoke the target directly.
 					// Note that the final invoker must be an InvokerInterceptor, so we know
 					// it does nothing but a reflective operation on the target, and no hot
 					// swapping or fancy proxying.
 					Object[] argsToUse = AopProxyUtils.adaptArgumentsIfNecessary(method, args);
-					try {
-						retVal = methodProxy.invoke(target, argsToUse);
-					}
-					catch (CodeGenerationException ex) {
-						CglibMethodInvocation.logFastClassGenerationFailure(method);
-						retVal = AopUtils.invokeJoinpointUsingReflection(target, method, argsToUse);
-					}
+					retVal = methodProxy.invoke(target, argsToUse);
 				}
 				else {
 					// We need to create a method invocation...
@@ -743,7 +736,10 @@ class CglibAopProxy implements AopProxy, Serializable {
 			super(proxy, target, method, arguments, targetClass, interceptorsAndDynamicMethodMatchers);

 			// Only use method proxy for public methods not derived from java.lang.Object
-			this.methodProxy = (isMethodProxyCompatible(method) ? methodProxy : null);
+			this.methodProxy = (Modifier.isPublic(method.getModifiers()) &&
+					method.getDeclaringClass() != Object.class && !AopUtils.isEqualsMethod(method) &&
+					!AopUtils.isHashCodeMethod(method) && !AopUtils.isToStringMethod(method) ?
+					methodProxy : null);
 		}

 		@Override
@@ -756,17 +752,10 @@ class CglibAopProxy implements AopProxy, Serializable {
 				throw ex;
 			}
 			catch (Exception ex) {
-				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.
+				if (ReflectionUtils.declaresException(getMethod(), ex.getClass())) {
 					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);
 				}
 			}
@@ -779,25 +768,10 @@ class CglibAopProxy implements AopProxy, Serializable {
 		@Override
 		protected Object invokeJoinpoint() throws Throwable {
 			if (this.methodProxy != null) {
-				try {
-					return this.methodProxy.invoke(this.target, this.arguments);
-				}
-				catch (CodeGenerationException ex) {
-					logFastClassGenerationFailure(this.method);
-				}
+				return this.methodProxy.invoke(this.target, this.arguments);
 			}
-			return super.invokeJoinpoint();
-		}
-
-		static boolean isMethodProxyCompatible(Method method) {
-			return (Modifier.isPublic(method.getModifiers()) &&
-					method.getDeclaringClass() != Object.class && !AopUtils.isEqualsMethod(method) &&
-					!AopUtils.isHashCodeMethod(method) && !AopUtils.isToStringMethod(method));
-		}
-
-		static void logFastClassGenerationFailure(Method method) {
-			if (logger.isDebugEnabled()) {
-				logger.debug("Failed to generate CGLIB fast class for method: " + method);
+			else {
+				return super.invokeJoinpoint();
 			}
 		}
 	}
@@ -968,11 +942,11 @@ class CglibAopProxy implements AopProxy, Serializable {
 			}
 			// Advice instance identity is unimportant to the proxy class:
 			// All that matters is type and ordering.
-			if (this.advised.getAdvisorCount() != otherAdvised.getAdvisorCount()) {
-				return false;
-			}
 			Advisor[] thisAdvisors = this.advised.getAdvisors();
 			Advisor[] thatAdvisors = otherAdvised.getAdvisors();
+			if (thisAdvisors.length != thatAdvisors.length) {
+				return false;
+			}
 			for (int i = 0; i < thisAdvisors.length; i++) {
 				Advisor thisAdvisor = thisAdvisors[i];
 				Advisor thatAdvisor = thatAdvisors[i];
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2021 the original author or authors.
+ * Copyright 2002-2015 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.io.Serializable;
 import java.lang.reflect.Proxy;

 import org.springframework.aop.SpringProxy;
-import org.springframework.core.NativeDetector;

 /**
 * Default {@link AopProxyFactory} implementation, creating either a CGLIB proxy
@@ -45,14 +44,20 @@ import org.springframework.core.NativeDetector;
 * @see AdvisedSupport#setProxyTargetClass
 * @see AdvisedSupport#setInterfaces
 */
+@SuppressWarnings("serial")
 public class DefaultAopProxyFactory implements AopProxyFactory, Serializable {

-	private static final long serialVersionUID = 7930414337282325166L;
+	/**
+	 * Whether this environment lives within a native image.
+	 * Exposed as a private static field rather than in a {@code NativeImageDetector.inNativeImage()} static method due to https://github.com/oracle/graal/issues/2594.
+	 * @see <a href="https://github.com/oracle/graal/blob/master/sdk/src/org.graalvm.nativeimage/src/org/graalvm/nativeimage/ImageInfo.java">ImageInfo.java</a>
+	 */
+	private static final boolean IN_NATIVE_IMAGE = (System.getProperty("org.graalvm.nativeimage.imagecode") != null);


 	@Override
 	public AopProxy createAopProxy(AdvisedSupport config) throws AopConfigException {
-		if (!NativeDetector.inNativeImage() &&
+		if (!IN_NATIVE_IMAGE &&
 				(config.isOptimize() || config.isProxyTargetClass() || hasNoUserSuppliedProxyInterfaces(config))) {
 			Class<?> targetClass = config.getTargetClass();
 			if (targetClass == null) {
@@ -104,7 +104,7 @@ final class JdkDynamicAopProxy implements AopProxy, InvocationHandler, Serializa
 	 */
 	public JdkDynamicAopProxy(AdvisedSupport config) throws AopConfigException {
 		Assert.notNull(config, "AdvisedSupport must not be null");
-		if (config.getAdvisorCount() == 0 && config.getTargetSource() == AdvisedSupport.EMPTY_TARGET_SOURCE) {
+		if (config.getAdvisors().length == 0 && config.getTargetSource() == AdvisedSupport.EMPTY_TARGET_SOURCE) {
 			throw new AopConfigException("No advisors and no TargetSource specified");
 		}
 		this.advised = config;
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2021 the original author or authors.
+ * Copyright 2002-2018 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.
@@ -73,9 +73,11 @@ public class ProxyConfig implements Serializable {
 	 * The exact meaning of "aggressive optimizations" will differ
 	 * between proxies, but there is usually some tradeoff.
 	 * Default is "false".
-	 * <p>With Spring's current proxy options, this flag effectively
-	 * enforces CGLIB proxies (similar to {@link #setProxyTargetClass})
-	 * but without any class validation checks (for final methods etc).
+	 * <p>For example, optimization will usually mean that advice changes won't
+	 * take effect after a proxy has been created. For this reason, optimization
+	 * is disabled by default. An optimize value of "true" may be ignored
+	 * if other settings preclude optimization: for example, if "exposeProxy"
+	 * is set to "true" and that's not compatible with the optimization.
 	 */
 	public void setOptimize(boolean optimize) {
 		this.optimize = optimize;
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2021 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.
@@ -421,7 +421,11 @@ public class ProxyFactoryBean extends ProxyCreatorSupport
 	 * are unaffected by such changes.
 	 */
 	private synchronized void initializeAdvisorChain() throws AopConfigException, BeansException {
-		if (!this.advisorChainInitialized && !ObjectUtils.isEmpty(this.interceptorNames)) {
+		if (this.advisorChainInitialized) {
+			return;
+		}
+
+		if (!ObjectUtils.isEmpty(this.interceptorNames)) {
 			if (this.beanFactory == null) {
 				throw new IllegalStateException("No BeanFactory available anymore (probably due to serialization) " +
 						"- cannot resolve interceptor names " + Arrays.asList(this.interceptorNames));
@@ -460,9 +464,9 @@ public class ProxyFactoryBean extends ProxyCreatorSupport
 					addAdvisorOnChainCreation(advice);
 				}
 			}
-
-			this.advisorChainInitialized = true;
 		}
+
+		this.advisorChainInitialized = true;
 	}


@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2021 the original author or authors.
+ * Copyright 2002-2012 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.
@@ -25,8 +25,8 @@ import org.springframework.aop.Advisor;
 import org.springframework.aop.ThrowsAdvice;

 /**
- * Adapter to enable {@link org.springframework.aop.ThrowsAdvice} to be used
- * in the Spring AOP framework.
+ * Adapter to enable {@link org.springframework.aop.MethodBeforeAdvice}
+ * to be used in the Spring AOP framework.
 *
 * @author Rod Johnson
 * @author Juergen Hoeller
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2021 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.
@@ -17,7 +17,6 @@
 package org.springframework.aop.framework.autoproxy;

 import java.lang.reflect.Constructor;
-import java.lang.reflect.Proxy;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Collections;
@@ -47,7 +46,6 @@ import org.springframework.beans.factory.FactoryBean;
 import org.springframework.beans.factory.config.ConfigurableBeanFactory;
 import org.springframework.beans.factory.config.ConfigurableListableBeanFactory;
 import org.springframework.beans.factory.config.SmartInstantiationAwareBeanPostProcessor;
-import org.springframework.core.SmartClassLoader;
 import org.springframework.lang.Nullable;
 import org.springframework.util.Assert;
 import org.springframework.util.StringUtils;
@@ -441,17 +439,7 @@ public abstract class AbstractAutoProxyCreator extends ProxyProcessorSupport
 		ProxyFactory proxyFactory = new ProxyFactory();
 		proxyFactory.copyFrom(this);

-		if (proxyFactory.isProxyTargetClass()) {
-			// Explicit handling of JDK proxy targets (for introduction advice scenarios)
-			if (Proxy.isProxyClass(beanClass)) {
-				// Must allow for introductions; can't just set interfaces to the proxy's interfaces only.
-				for (Class<?> ifc : beanClass.getInterfaces()) {
-					proxyFactory.addInterface(ifc);
-				}
-			}
-		}
-		else {
-			// No proxyTargetClass flag enforced, let's apply our default checks...
+		if (!proxyFactory.isProxyTargetClass()) {
 			if (shouldProxyTargetClass(beanClass, beanName)) {
 				proxyFactory.setProxyTargetClass(true);
 			}
@@ -470,12 +458,7 @@ public abstract class AbstractAutoProxyCreator extends ProxyProcessorSupport
 			proxyFactory.setPreFiltered(true);
 		}

-		// Use original ClassLoader if bean class not locally loaded in overriding class loader
-		ClassLoader classLoader = getProxyClassLoader();
-		if (classLoader instanceof SmartClassLoader && classLoader != beanClass.getClassLoader()) {
-			classLoader = ((SmartClassLoader) classLoader).getOriginalClassLoader();
-		}
-		return proxyFactory.getProxy(classLoader);
+		return proxyFactory.getProxy(getProxyClassLoader());
 	}

 	/**
@@ -520,10 +503,7 @@ public abstract class AbstractAutoProxyCreator extends ProxyProcessorSupport

 		List<Object> allInterceptors = new ArrayList<>();
 		if (specificInterceptors != null) {
-			if (specificInterceptors.length > 0) {
-				// specificInterceptors may equal PROXY_WITHOUT_ADDITIONAL_INTERCEPTORS
-				allInterceptors.addAll(Arrays.asList(specificInterceptors));
-			}
+			allInterceptors.addAll(Arrays.asList(specificInterceptors));
 			if (commonInterceptors.length > 0) {
 				if (this.applyCommonInterceptorsFirst) {
 					allInterceptors.addAll(0, Arrays.asList(commonInterceptors));
@@ -61,7 +61,7 @@ public class BeanNameAutoProxyCreator extends AbstractAutoProxyCreator {
 	 * FactoryBean will get proxied. This default behavior applies as of Spring 2.0.
 	 * If you intend to proxy a FactoryBean instance itself (a rare use case, but
 	 * Spring 1.2's default behavior), specify the bean name of the FactoryBean
-	 * including the factory-bean prefix "&amp;": e.g. "&amp;myFactoryBean".
+	 * including the factory-bean prefix "&": e.g. "&myFactoryBean".
 	 * @see org.springframework.beans.factory.FactoryBean
 	 * @see org.springframework.beans.factory.BeanFactory#FACTORY_BEAN_PREFIX
 	 */
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2021 the original author or authors.
+ * Copyright 2002-2018 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.
@@ -125,8 +125,12 @@ public abstract class AbstractBeanFactoryBasedTargetSourceCreator
 	 */
 	protected DefaultListableBeanFactory getInternalBeanFactoryForBean(String beanName) {
 		synchronized (this.internalBeanFactories) {
-			return this.internalBeanFactories.computeIfAbsent(beanName,
-					name -> buildInternalBeanFactory(this.beanFactory));
+			DefaultListableBeanFactory internalBeanFactory = this.internalBeanFactories.get(beanName);
+			if (internalBeanFactory == null) {
+				internalBeanFactory = buildInternalBeanFactory(this.beanFactory);
+				this.internalBeanFactories.put(beanName, internalBeanFactory);
+			}
+			return internalBeanFactory;
 		}
 	}

@@ -25,11 +25,9 @@ import org.springframework.lang.Nullable;
 /**
 * Convenient TargetSourceCreator using bean name prefixes to create one of three
 * well-known TargetSource types:
- * <ul>
- * <li>: CommonsPool2TargetSource</li>
- * <li>% ThreadLocalTargetSource</li>
- * <li>! PrototypeTargetSource</li>
- * </ul>
+ * <li>: CommonsPool2TargetSource
+ * <li>% ThreadLocalTargetSource
+ * <li>! PrototypeTargetSource
 *
 * @author Rod Johnson
 * @author Stephane Nicoll
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2021 the original author or authors.
+ * Copyright 2002-2017 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.
@@ -137,7 +137,7 @@ public abstract class AbstractBeanFactoryPointcutAdvisor extends AbstractPointcu
 		StringBuilder sb = new StringBuilder(getClass().getName());
 		sb.append(": advice ");
 		if (this.adviceBeanName != null) {
-			sb.append("bean '").append(this.adviceBeanName).append('\'');
+			sb.append("bean '").append(this.adviceBeanName).append("'");
 		}
 		else {
 			sb.append(this.advice);
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2021 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.
@@ -146,7 +146,7 @@ public class ControlFlowPointcut implements Pointcut, ClassFilter, MethodMatcher

 	@Override
 	public String toString() {
-		return getClass().getName() + ": class = " + this.clazz.getName() + "; methodName = " + this.methodName;
+		return getClass().getName() + ": class = " + this.clazz.getName() + "; methodName = " + methodName;
 	}

 }
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2021 the original author or authors.
+ * Copyright 2002-2019 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.
@@ -71,8 +71,7 @@ public class DefaultIntroductionAdvisor implements IntroductionAdvisor, ClassFil
 		if (introductionInfo != null) {
 			Class<?>[] introducedInterfaces = introductionInfo.getInterfaces();
 			if (introducedInterfaces.length == 0) {
-				throw new IllegalArgumentException(
-						"IntroductionInfo defines no interfaces to introduce: " + introductionInfo);
+				throw new IllegalArgumentException("IntroductionAdviceSupport implements no interfaces");
 			}
 			for (Class<?> ifc : introducedInterfaces) {
 				addInterface(ifc);
@@ -191,9 +191,9 @@ public abstract class AbstractBeanFactoryBasedTargetSource implements TargetSour
 	@Override
 	public String toString() {
 		StringBuilder sb = new StringBuilder(getClass().getSimpleName());
-		sb.append(" for target bean '").append(this.targetBeanName).append('\'');
+		sb.append(" for target bean '").append(this.targetBeanName).append("'");
 		if (this.targetClass != null) {
-			sb.append(" of type [").append(this.targetClass.getName()).append(']');
+			sb.append(" of type [").append(this.targetClass.getName()).append("]");
 		}
 		return sb.toString();
 	}
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2021 the original author or authors.
+ * Copyright 2002-2018 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.
@@ -116,7 +116,7 @@ public abstract class AbstractPoolingTargetSource extends AbstractPrototypeBased


 	/**
-	 * Return an IntroductionAdvisor that provides a mixin
+	 * Return an IntroductionAdvisor that providing a mixin
 	 * exposing statistics about the pool maintained by this object.
 	 */
 	public DefaultIntroductionAdvisor getPoolingConfigMixin() {
@@ -276,14 +276,14 @@ public class AspectJAdviceParameterNameDiscovererTests {

 	private static String format(String[] names) {
 		StringBuilder sb = new StringBuilder();
-		sb.append('(');
+		sb.append("(");
 		for (int i = 0; i < names.length; i++) {
 			sb.append(names[i]);
 			if ((i + 1) < names.length) {
-				sb.append(',');
+				sb.append(",");
 			}
 		}
-		sb.append(')');
+		sb.append(")");
 		return sb.toString();
 	}

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2022 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.
@@ -322,7 +322,7 @@ abstract class AbstractAspectJAdvisorFactoryTests {
 		int b = 12;
 		int c = 25;
 		String d = "d";
-		StringBuilder e = new StringBuilder("stringbuf");
+		StringBuffer e = new StringBuffer("stringbuf");
 		String expectedResult = a + b+ c + d + e;
 		assertThat(mva.mungeArgs(a, b, c, d, e)).isEqualTo(expectedResult);
 	}
@@ -728,12 +728,12 @@ abstract class AbstractAspectJAdvisorFactoryTests {
 	@Aspect
 	static class ManyValuedArgs {

-		String mungeArgs(String a, int b, int c, String d, StringBuilder e) {
+		String mungeArgs(String a, int b, int c, String d, StringBuffer e) {
 			return a + b + c + d + e;
 		}

 		@Around(value="execution(String mungeArgs(..)) && args(a, b, c, d, e)", argNames="b,c,d,e,a")
-		String reverseAdvice(ProceedingJoinPoint pjp, int b, int c, String d, StringBuilder e, String a) throws Throwable {
+		String reverseAdvice(ProceedingJoinPoint pjp, int b, int c, String d, StringBuffer e, String a) throws Throwable {
 			assertThat(pjp.proceed()).isEqualTo(a + b+ c+ d+ e);
 			return a + b + c + d + e;
 		}
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2021 the original author or authors.
+ * Copyright 2002-2019 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.
@@ -183,7 +183,7 @@ public class ProxyFactoryTests {
 	}

 	@Test
-	public void testGetsAllInterfaces() {
+	public void testGetsAllInterfaces() throws Exception {
 		// Extend to get new interface
 		class TestBeanSubclass extends TestBean implements Comparable<Object> {
 			@Override
@@ -240,16 +240,6 @@ public class ProxyFactoryTests {
 		assertThat(factory.countAdvicesOfType(NopInterceptor.class) == 2).isTrue();
 	}

-	@Test
-	public void testSealedInterfaceExclusion() {
-		// String implements ConstantDesc on JDK 12+, sealed as of JDK 17
-		ProxyFactory factory = new ProxyFactory(new String());
-		NopInterceptor di = new NopInterceptor();
-		factory.addAdvice(0, di);
-		Object proxy = factory.getProxy();
-		assertThat(proxy).isInstanceOf(CharSequence.class);
-	}
-
 	/**
 	 * Should see effect immediately on behavior.
 	 */
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2021 the original author or authors.
+ * Copyright 2002-2019 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.
@@ -13,7 +13,6 @@
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
-
 package org.springframework.aop.support;

 import org.junit.jupiter.api.Test;
@@ -30,10 +29,10 @@ import static org.assertj.core.api.Assertions.assertThat;
 * @author Rob Harrop
 * @author Rick Evans
 */
-class ClassUtilsTests {
+public class ClassUtilsTests {

 	@Test
-	void getShortNameForCglibClass() {
+	public void getShortNameForCglibClass() {
 		TestBean tb = new TestBean();
 		ProxyFactory pf = new ProxyFactory();
 		pf.setTarget(tb);
@@ -42,5 +41,4 @@ class ClassUtilsTests {
 		String className = ClassUtils.getShortName(proxy.getClass());
 		assertThat(className).as("Class name did not match").isEqualTo("TestBean");
 	}
-
 }
@@ -16,9 +16,9 @@
 		</aop:aspect>
 	</aop:config>

-	<bean id="getNameCounter" class="org.springframework.aop.testfixture.advice.CountingBeforeAdvice"/>
+	<bean id="getNameCounter" class="org.springframework.aop.framework.CountingBeforeAdvice"/>

-	<bean id="getAgeCounter" class="org.springframework.aop.testfixture.advice.CountingBeforeAdvice"/>
+	<bean id="getAgeCounter" class="org.springframework.aop.framework.CountingBeforeAdvice"/>

 	<bean id="testBean" class="org.springframework.beans.testfixture.beans.TestBean"/>

@@ -9,6 +9,6 @@
 		<aop:advisor advice-ref="countingAdvice" pointcut="within(org.springframework..*)"/>
 	</aop:config>

-	<bean id="countingAdvice" class="org.springframework.aop.testfixture.advice.CountingBeforeAdvice"/>
+	<bean id="countingAdvice" class="org.springframework.aop.framework.CountingBeforeAdvice"/>

 </beans>
@@ -10,6 +10,6 @@
 		<aop:advisor advice-ref="countingAdvice" pointcut-ref="pc"/>
 	</aop:config>

-	<bean id="countingAdvice" class="org.springframework.aop.testfixture.advice.CountingBeforeAdvice"/>
+	<bean id="countingAdvice" class="org.springframework.aop.framework.CountingBeforeAdvice"/>

 </beans>
@@ -12,7 +12,7 @@
 		</aop:aspect>
 	</aop:config>

-	<bean id="getAgeCounter" class="org.springframework.aop.testfixture.advice.CountingBeforeAdvice"/>
+	<bean id="getAgeCounter" class="org.springframework.aop.framework.CountingBeforeAdvice"/>

 	<bean id="testBean" class="org.springframework.beans.testfixture.beans.TestBean"/>

@@ -12,7 +12,7 @@
 		</aop:aspect>
 	</aop:config>

-	<bean id="getAgeCounter" class="org.springframework.aop.testfixture.advice.CountingBeforeAdvice"/>
+	<bean id="getAgeCounter" class="org.springframework.aop.framework.CountingBeforeAdvice"/>

 	<bean id="testBean" class="org.springframework.beans.testfixture.beans.TestBean"/>

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2022 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.
@@ -19,7 +19,6 @@ package org.springframework.aop.testfixture.advice;
 import java.io.Serializable;
 import java.lang.reflect.Method;
 import java.util.HashMap;
-import java.util.Map;

 /**
 * Abstract superclass for counting advices etc.
@@ -32,7 +31,7 @@ import java.util.Map;
 public class MethodCounter implements Serializable {

 	/** Method name --> count, does not understand overloading */
-	private Map<String, Integer> map = new HashMap<>();
+	private HashMap<String, Integer> map = new HashMap<>();

 	private int allCount;

@@ -11,7 +11,7 @@ sourceSets.test.java.srcDirs = files()
 aspectj.version = dependencyManagement.managedVersions['org.aspectj:aspectjweaver']

 dependencies {
-	api("org.aspectj:aspectjweaver")
+	compile("org.aspectj:aspectjweaver")
 	compileOnly("org.aspectj:aspectjrt")
 	optional(project(":spring-aop"))  // for @Async support
 	optional(project(":spring-beans"))  // for @Configurable support
@@ -21,13 +21,13 @@ dependencies {
 	optional(project(":spring-tx"))  // for JPA, @Transactional support
 	optional("javax.cache:cache-api")  // for JCache aspect
 	optional("javax.transaction:javax.transaction-api")  // for @javax.transaction.Transactional support
-	testImplementation(project(":spring-core"))  // for CodeStyleAspect
-	testImplementation(project(":spring-test"))
-	testImplementation(testFixtures(project(":spring-context")))
-	testImplementation(testFixtures(project(":spring-context-support")))
-	testImplementation(testFixtures(project(":spring-core")))
-	testImplementation(testFixtures(project(":spring-tx")))
-	testImplementation("javax.mail:javax.mail-api")
+	testCompile(project(":spring-core"))  // for CodeStyleAspect
+	testCompile(project(":spring-test"))
+	testCompile(testFixtures(project(":spring-context")))
+	testCompile(testFixtures(project(":spring-context-support")))
+	testCompile(testFixtures(project(":spring-core")))
+	testCompile(testFixtures(project(":spring-tx")))
+	testCompile("javax.mail:javax.mail-api")
 	testCompileOnly("org.aspectj:aspectjrt")
 }

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2021 the original author or authors.
+ * Copyright 2002-2012 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.
@@ -13,14 +13,14 @@
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
-
 package org.springframework.beans.factory.aspectj;

 /**
- * Marker interface for domain objects that need DI through aspects.
+ * Marker interface for domain object that need DI through aspects.
 *
 * @author Ramnivas Laddad
 * @since 2.5
 */
 public interface ConfigurableObject {
+
 }
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2020 the original author or authors.
+ * Copyright 2002-2017 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.
@@ -59,8 +59,7 @@ public abstract aspect AbstractTransactionAspect extends TransactionAspectSuppor

 	@Override
 	public void destroy() {
-		// An aspect is basically a singleton -> cleanup on destruction
-		clearTransactionManagerCache();
+		clearTransactionManagerCache(); // An aspect is basically a singleton
 	}

 	@SuppressAjWarnings("adviceDidNotMatch")
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2021 the original author or authors.
+ * Copyright 2002-2019 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.
@@ -20,6 +20,7 @@ import org.junit.jupiter.api.AfterEach;
 import org.junit.jupiter.api.Disabled;
 import org.junit.jupiter.api.Test;

+import org.springframework.beans.factory.BeanCreationException;
 import org.springframework.cache.CacheManager;
 import org.springframework.cache.annotation.CachingConfigurerSupport;
 import org.springframework.cache.annotation.EnableCaching;
@@ -106,7 +107,10 @@ public class AspectJEnableCachingIsolatedTests {
 		try {
 			load(MultiCacheManagerConfigurer.class, EnableCachingConfig.class);
 		}
-		catch (IllegalStateException ex) {
+		catch (BeanCreationException ex) {
+			Throwable root = ex.getRootCause();
+			boolean condition = root instanceof IllegalStateException;
+			assertThat(condition).isTrue();
 			assertThat(ex.getMessage().contains("implementations of CachingConfigurer")).isTrue();
 		}
 	}
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2021 the original author or authors.
+ * Copyright 2002-2014 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.
@@ -22,18 +22,13 @@ import org.springframework.contextsupport.testfixture.jcache.AbstractJCacheAnnot

 /**
 * @author Stephane Nicoll
- * @author Sam Brannen
 */
 public class JCacheAspectJNamespaceConfigTests extends AbstractJCacheAnnotationTests {

 	@Override
 	protected ApplicationContext getApplicationContext() {
-		GenericXmlApplicationContext context = new GenericXmlApplicationContext();
-		// Disallow bean definition overriding to test https://github.com/spring-projects/spring-framework/pull/27499
-		context.setAllowBeanDefinitionOverriding(false);
-		context.load("/org/springframework/cache/config/annotation-jcache-aspectj.xml");
-		context.refresh();
-		return context;
+		return new GenericXmlApplicationContext(
+				"/org/springframework/cache/config/annotation-jcache-aspectj.xml");
 	}

 }
@@ -13,7 +13,6 @@
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
-
 package org.springframework.transaction.aspectj;

 import org.springframework.transaction.annotation.Transactional;
@@ -30,5 +29,4 @@ public class ClassWithPrivateAnnotatedMember {

 	@Transactional
 	private void doInTransaction() {}
-
 }
@@ -13,7 +13,6 @@
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
-
 package org.springframework.transaction.aspectj;

 import org.springframework.transaction.annotation.Transactional;
@@ -30,5 +29,4 @@ public class ClassWithProtectedAnnotatedMember {

 	@Transactional
 	protected void doInTransaction() {}
-
 }
@@ -4,14 +4,14 @@ apply plugin: "groovy"
 apply plugin: "kotlin"

 dependencies {
-	api(project(":spring-core"))
+	compile(project(":spring-core"))
 	optional("javax.inject:javax.inject")
 	optional("org.yaml:snakeyaml")
 	optional("org.codehaus.groovy:groovy-xml")
 	optional("org.jetbrains.kotlin:kotlin-reflect")
 	optional("org.jetbrains.kotlin:kotlin-stdlib")
-	testImplementation(testFixtures(project(":spring-core")))
-	testImplementation("javax.annotation:javax.annotation-api")
+	testCompile(testFixtures(project(":spring-core")))
+	testCompile("javax.annotation:javax.annotation-api")
 	testFixturesApi("org.junit.jupiter:junit-jupiter-api")
 	testFixturesImplementation("org.assertj:assertj-core")
 }
@@ -23,6 +23,8 @@ sourceSets {
 }

 compileGroovy {
+	sourceCompatibility = 1.8
+	targetCompatibility = 1.8
 	options.compilerArgs += "-Werror"
 }

@@ -1,13 +1,14 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-	xsi:schemaLocation="http://www.springframework.org/schema/beans https://www.springframework.org/schema/beans/spring-beans.xsd">
+<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN 2.0//EN" "https://www.springframework.org/dtd/spring-beans-2.0.dtd">

-  <bean id="bean1" class="org.springframework.beans.factory.ConcurrentBeanFactoryBenchmark$ConcurrentBean"
+<beans>
+
+  <bean id="bean1" class="org.springframework.beans.factory.ConcurrentBeanFactoryTests$ConcurrentBean"
 			scope="prototype">
    <property name="date" value="2004/08/08"/>
  </bean>

-  <bean id="bean2" class="org.springframework.beans.factory.ConcurrentBeanFactoryBenchmark$ConcurrentBean"
+  <bean id="bean2" class="org.springframework.beans.factory.ConcurrentBeanFactoryTests$ConcurrentBean"
 			scope="prototype">
    <property name="date" value="2000/02/02"/>
  </bean>
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2021 the original author or authors.
+ * Copyright 2002-2019 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.
@@ -305,10 +305,8 @@ public abstract class AbstractNestablePropertyAccessor extends AbstractPropertyA
 					Class<?> componentType = propValue.getClass().getComponentType();
 					Object newArray = Array.newInstance(componentType, arrayIndex + 1);
 					System.arraycopy(propValue, 0, newArray, 0, length);
-					int lastKeyIndex = tokens.canonicalName.lastIndexOf('[');
-					String propName = tokens.canonicalName.substring(0, lastKeyIndex);
-					setPropertyValue(propName, newArray);
-					propValue = getPropertyValue(propName);
+					setPropertyValue(tokens.actualName, newArray);
+					propValue = getPropertyValue(tokens.actualName);
 				}
 				Array.set(propValue, arrayIndex, convertedValue);
 			}
@@ -424,12 +422,9 @@ public abstract class AbstractNestablePropertyAccessor extends AbstractPropertyA
 				}
 				return;
 			}
-			if (this.suppressNotWritablePropertyException) {
-				// Optimization for common ignoreUnknown=true scenario since the
-				// exception would be caught and swallowed higher up anyway...
-				return;
+			else {
+				throw createNotWritablePropertyException(tokens.canonicalName);
 			}
-			throw createNotWritablePropertyException(tokens.canonicalName);
 		}

 		Object oldValue = null;
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2020 the original author or authors.
+ * Copyright 2002-2018 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.
@@ -40,8 +40,6 @@ public abstract class AbstractPropertyAccessor extends TypeConverterSupport impl

 	private boolean autoGrowNestedPaths = false;

-	boolean suppressNotWritablePropertyException = false;
-

 	@Override
 	public void setExtractOldValueForEditor(boolean extractOldValueForEditor) {
@@ -91,41 +89,30 @@ public abstract class AbstractPropertyAccessor extends TypeConverterSupport impl
 		List<PropertyAccessException> propertyAccessExceptions = null;
 		List<PropertyValue> propertyValues = (pvs instanceof MutablePropertyValues ?
 				((MutablePropertyValues) pvs).getPropertyValueList() : Arrays.asList(pvs.getPropertyValues()));
-
-		if (ignoreUnknown) {
-			this.suppressNotWritablePropertyException = true;
-		}
-		try {
-			for (PropertyValue pv : propertyValues) {
-				// setPropertyValue may throw any BeansException, which won't be caught
+		for (PropertyValue pv : propertyValues) {
+			try {
+				// This method may throw any BeansException, which won't be caught
 				// here, if there is a critical failure such as no matching field.
 				// We can attempt to deal only with less serious exceptions.
-				try {
-					setPropertyValue(pv);
-				}
-				catch (NotWritablePropertyException ex) {
-					if (!ignoreUnknown) {
-						throw ex;
-					}
-					// Otherwise, just ignore it and continue...
-				}
-				catch (NullValueInNestedPathException ex) {
-					if (!ignoreInvalid) {
-						throw ex;
-					}
-					// Otherwise, just ignore it and continue...
-				}
-				catch (PropertyAccessException ex) {
-					if (propertyAccessExceptions == null) {
-						propertyAccessExceptions = new ArrayList<>();
-					}
-					propertyAccessExceptions.add(ex);
-				}
+				setPropertyValue(pv);
 			}
-		}
-		finally {
-			if (ignoreUnknown) {
-				this.suppressNotWritablePropertyException = false;
+			catch (NotWritablePropertyException ex) {
+				if (!ignoreUnknown) {
+					throw ex;
+				}
+				// Otherwise, just ignore it and continue...
+			}
+			catch (NullValueInNestedPathException ex) {
+				if (!ignoreInvalid) {
+					throw ex;
+				}
+				// Otherwise, just ignore it and continue...
+			}
+			catch (PropertyAccessException ex) {
+				if (propertyAccessExceptions == null) {
+					propertyAccessExceptions = new ArrayList<>();
+				}
+				propertyAccessExceptions.add(ex);
 			}
 		}

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2021 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.
@@ -41,6 +41,8 @@ import kotlin.reflect.KParameter;
 import kotlin.reflect.full.KClasses;
 import kotlin.reflect.jvm.KCallablesJvm;
 import kotlin.reflect.jvm.ReflectJvmMapping;
+import org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogFactory;

 import org.springframework.core.DefaultParameterNameDiscoverer;
 import org.springframework.core.KotlinDetector;
@@ -73,6 +75,8 @@ import org.springframework.util.StringUtils;
 */
 public abstract class BeanUtils {

+	private static final Log logger = LogFactory.getLog(BeanUtils.class);
+
 	private static final ParameterNameDiscoverer parameterNameDiscoverer =
 			new DefaultParameterNameDiscoverer();

@@ -87,10 +91,7 @@ public abstract class BeanUtils {
 		values.put(byte.class, (byte) 0);
 		values.put(short.class, (short) 0);
 		values.put(int.class, 0);
-		values.put(long.class, 0L);
-		values.put(float.class, 0F);
-		values.put(double.class, 0D);
-		values.put(char.class, '\0');
+		values.put(long.class, (long) 0);
 		DEFAULT_TYPE_VALUES = Collections.unmodifiableMap(values);
 	}

@@ -100,9 +101,9 @@ public abstract class BeanUtils {
 	 * @param clazz class to instantiate
 	 * @return the new instance
 	 * @throws BeanInstantiationException if the bean cannot be instantiated
-	 * @see Class#newInstance()
 	 * @deprecated as of Spring 5.0, following the deprecation of
 	 * {@link Class#newInstance()} in JDK 9
+	 * @see Class#newInstance()
 	 */
 	@Deprecated
 	public static <T> T instantiate(Class<T> clazz) throws BeanInstantiationException {
@@ -226,45 +227,32 @@ public abstract class BeanUtils {
 	}

 	/**
-	 * Return a resolvable constructor for the provided class, either a primary or single
-	 * public constructor with arguments, or a single non-public constructor with arguments,
-	 * or simply a default constructor. Callers have to be prepared to resolve arguments
-	 * for the returned constructor's parameters, if any.
+	 * Return a resolvable constructor for the provided class, either a primary constructor
+	 * or single public constructor or simply a default constructor. Callers have to be
+	 * prepared to resolve arguments for the returned constructor's parameters, if any.
 	 * @param clazz the class to check
-	 * @throws IllegalStateException in case of no unique constructor found at all
 	 * @since 5.3
 	 * @see #findPrimaryConstructor
 	 */
 	@SuppressWarnings("unchecked")
 	public static <T> Constructor<T> getResolvableConstructor(Class<T> clazz) {
 		Constructor<T> ctor = findPrimaryConstructor(clazz);
-		if (ctor != null) {
-			return ctor;
-		}
-
-		Constructor<?>[] ctors = clazz.getConstructors();
-		if (ctors.length == 1) {
-			// A single public constructor
-			return (Constructor<T>) ctors[0];
-		}
-		else if (ctors.length == 0){
-			ctors = clazz.getDeclaredConstructors();
+		if (ctor == null) {
+			Constructor<?>[] ctors = clazz.getConstructors();
 			if (ctors.length == 1) {
-				// A single non-public constructor, e.g. from a non-public record type
-				return (Constructor<T>) ctors[0];
+				ctor = (Constructor<T>) ctors[0];
+			}
+			else {
+				try {
+					ctor = clazz.getDeclaredConstructor();
+				}
+				catch (NoSuchMethodException ex) {
+					throw new IllegalStateException("No primary or single public constructor found for " +
+							clazz + " - and no default constructor found either");
+				}
 			}
 		}
-
-		// Several constructors -> let's try to take the default constructor
-		try {
-			return clazz.getDeclaredConstructor();
-		}
-		catch (NoSuchMethodException ex) {
-			// Giving up...
-		}
-
-		// No unique constructor at all
-		throw new IllegalStateException("No primary or single unique constructor found for " + clazz);
+		return ctor;
 	}

 	/**
@@ -280,7 +268,10 @@ public abstract class BeanUtils {
 	public static <T> Constructor<T> findPrimaryConstructor(Class<T> clazz) {
 		Assert.notNull(clazz, "Class must not be null");
 		if (KotlinDetector.isKotlinReflectPresent() && KotlinDetector.isKotlinType(clazz)) {
-			return KotlinDelegate.findPrimaryConstructor(clazz);
+			Constructor<T> kotlinPrimaryConstructor = KotlinDelegate.findPrimaryConstructor(clazz);
+			if (kotlinPrimaryConstructor != null) {
+				return kotlinPrimaryConstructor;
+			}
 		}
 		return null;
 	}
@@ -540,7 +531,7 @@ public abstract class BeanUtils {

 	/**
 	 * Find a JavaBeans PropertyEditor following the 'Editor' suffix convention
-	 * (e.g. "mypackage.MyDomainClass" &rarr; "mypackage.MyDomainClassEditor").
+	 * (e.g. "mypackage.MyDomainClass" -> "mypackage.MyDomainClassEditor").
 	 * <p>Compatible to the standard JavaBeans convention as implemented by
 	 * {@link java.beans.PropertyEditorManager} but isolated from the latter's
 	 * registered default editors for primitive types.
@@ -552,7 +543,6 @@ public abstract class BeanUtils {
 		if (targetType == null || targetType.isArray() || unknownEditorTypes.contains(targetType)) {
 			return null;
 		}
-
 		ClassLoader cl = targetType.getClassLoader();
 		if (cl == null) {
 			try {
@@ -563,29 +553,34 @@ public abstract class BeanUtils {
 			}
 			catch (Throwable ex) {
 				// e.g. AccessControlException on Google App Engine
+				if (logger.isDebugEnabled()) {
+					logger.debug("Could not access system ClassLoader: " + ex);
+				}
 				return null;
 			}
 		}
-
 		String targetTypeName = targetType.getName();
 		String editorName = targetTypeName + "Editor";
 		try {
 			Class<?> editorClass = cl.loadClass(editorName);
-			if (editorClass != null) {
-				if (!PropertyEditor.class.isAssignableFrom(editorClass)) {
-					unknownEditorTypes.add(targetType);
-					return null;
+			if (!PropertyEditor.class.isAssignableFrom(editorClass)) {
+				if (logger.isInfoEnabled()) {
+					logger.info("Editor class [" + editorName +
+							"] does not implement [java.beans.PropertyEditor] interface");
 				}
-				return (PropertyEditor) instantiateClass(editorClass);
+				unknownEditorTypes.add(targetType);
+				return null;
 			}
-			// Misbehaving ClassLoader returned null instead of ClassNotFoundException
-			// - fall back to unknown editor type registration below
+			return (PropertyEditor) instantiateClass(editorClass);
 		}
 		catch (ClassNotFoundException ex) {
-			// 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;
 		}
-		unknownEditorTypes.add(targetType);
-		return null;
 	}

 	/**
@@ -777,14 +772,7 @@ public abstract class BeanUtils {
 					if (readMethod != null) {
 						ResolvableType sourceResolvableType = ResolvableType.forMethodReturnType(readMethod);
 						ResolvableType targetResolvableType = ResolvableType.forMethodParameter(writeMethod, 0);
-
-						// Ignore generic types in assignable check if either ResolvableType has unresolvable generics.
-						boolean isAssignable =
-								(sourceResolvableType.hasUnresolvableGenerics() || targetResolvableType.hasUnresolvableGenerics() ?
-										ClassUtils.isAssignable(writeMethod.getParameterTypes()[0], readMethod.getReturnType()) :
-										targetResolvableType.isAssignableFrom(sourceResolvableType));
-
-						if (isAssignable) {
+						if (targetResolvableType.isAssignableFrom(sourceResolvableType)) {
 							try {
 								if (!Modifier.isPublic(readMethod.getDeclaringClass().getModifiers())) {
 									readMethod.setAccessible(true);
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2020 the original author or authors.
+ * Copyright 2002-2018 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.
@@ -92,7 +92,8 @@ public class DirectFieldAccessor extends AbstractNestablePropertyAccessor {
 	@Override
 	protected NotWritablePropertyException createNotWritablePropertyException(String propertyName) {
 		PropertyMatches matches = PropertyMatches.forField(propertyName, getRootClass());
-		throw new NotWritablePropertyException(getRootClass(), getNestedPath() + propertyName,
+		throw new NotWritablePropertyException(
+				getRootClass(), getNestedPath() + propertyName,
 				matches.buildErrorMessage(), matches.getPossibleMatches());
 	}

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2021 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.
@@ -138,7 +138,7 @@ final class GenericTypeAwarePropertyDescriptor extends PropertyDescriptor {
 		Set<Method> ambiguousCandidates = this.ambiguousWriteMethods;
 		if (ambiguousCandidates != null) {
 			this.ambiguousWriteMethods = null;
-			LogFactory.getLog(GenericTypeAwarePropertyDescriptor.class).debug("Non-unique JavaBean property '" +
+			LogFactory.getLog(GenericTypeAwarePropertyDescriptor.class).warn("Invalid JavaBean property '" +
 					getName() + "' being accessed! Ambiguous write methods found next to actually used [" +
 					this.writeMethod + "]: " + ambiguousCandidates);
 		}
--- a/Show More
+++ b/Show More