This commit ensures that the varargs component type for a MethodHandle
cannot be null in ReflectionHelper's
convertAllMethodHandleArguments(...) method in SpEL.
Closes gh-33193
Prior to this commit, the Spring Expression Language (SpEL) could not
invoke a varargs MethodHandle function with an array containing the
variable arguments, although that is supported for a varargs Method
function. Attempting to do so resulted in the array being supplied as a
single argument to the MethodHandle.
This commit addresses this by updating the
executeFunctionViaMethodHandle(...) method in FunctionReference as
follows when the user supplies the varargs already packaged in an array.
- Creates a new array large enough to hold the non-varargs arguments
and the unpackaged varargs arguments.
- Adds the non-varargs arguments to the beginning of that array and
adds the unpackaged varargs arguments to the end of that array.
- Invokes the MethodHandle with the new arguments array.
Closes gh-33191
Previous to this change, the transactional aspect would supersed the
user-defined AspectJ aspect, shortcircuiting to calling the original
Kotlin suspending function.
This change simplifies the TransactionAspectSupport way of dealing with
transactional coroutines, thanks to the fact that lower level support
for AOP has been introduced in c8169e5c.
Closes gh-33095
Prior to this commit, the Spring Expression Language (SpEL) could not
invoke a varargs MethodHandle function with zero variable arguments,
even though the variable arguments are not required. Attempting to do
so resulted in a SpelEvaluationException with an
INCORRECT_NUMBER_OF_ARGUMENTS_TO_FUNCTION message.
This commit addresses this by updating the
executeFunctionViaMethodHandle(...) method in FunctionReference so that
it properly checks the required number of arguments for both varargs
and non-varargs MethodHandle invocations.
This commit also improves the error message for varargs invocations
with too few arguments. For example, if the MethodHandle requires at
least 1 argument plus a variable number of additional arguments and 0
arguments were supplied, the error message now states:
"Incorrect number of arguments for function 'myFunc': 0 supplied but function takes 1 or more"
Instead of:
"Incorrect number of arguments for function 'myFunc': 0 supplied but function takes 2"
Closes gh-33190
This commit harmonizes the invocation of a bean supplier with what
SimpleInstantiationStrategy does. Previously, the current factory method
was set to `null` once the invocation completes. This did not take
into account recursive scenarios where an instance supplier triggers
another instance supplier.
For consistency, the thread local is removed now if we attempt to set
the current method to null. SimpleInstantiationStrategy itself uses
the shortcut to align the code as much as possible.
Closes gh-33180
Prior to this commit, the Spring Expression Language (SpEL) incorrectly
split single String arguments by comma for Object... varargs method and
constructor invocations.
This commit addresses this by checking if the single argument type is
already "assignable" to the varargs component type instead of "equal"
to the varargs component type.
Closes gh-33013
In preparation for releasing Spring Framework from GitHub actions, this
commit adds a `verify` workflow that validates that the released bits
are correct by running sample projects against them.
Closes gh-33178
This commit updates the CI workflow to build against Java 23-ea as
well, using the temurin distribution. For consistency, we're also
building against Java 22.
Closes gh-32090
This commit harmonizes our CI configuration with Spring Boot, in
particular the clever use of reusable custom actions that simplify
the workflow definition quite a bit.
One main difference compared to Spring Boot is that we can now
specify a different distribution for a Java version to test, in
preparation for the support of building against 23-ea
See gh-32090
Commit 84714fbae9 introduced usage of the
-Djava.locale.providers=COMPAT command-line argument for javac in order
to allow our JDK 20 builds to pass by using legacy locale data.
That was done to ensure that Date/Time formats using AM/PM produced a
standard space (" ") before the "AM" or "PM" instead of a narrow
non-breaking space (NNBSP "\u202F"), which was introduced in Java 20
due to adoption of Unicode Common Locale Data Repository (CLDR-14032).
This commit removes usage of the -Djava.locale.providers=COMPAT
command-line argument and updates all affected tests to:
- Use an NNBSP before "AM" or "PM" in input text when running on Java 20
or higher.
- Leniently match against any Unicode space character in formatted
values containing "AM" or "PM".
See https://jdk.java.net/20/release-notes#JDK-8284840
See https://unicode-org.atlassian.net/browse/CLDR-14032
See gh-30185
Closes gh-33144
When a response fails to be completely emitted by the remote (connection
termination during the transmission of the response for example), a
WebClientResponseException can be propagated with a confusing message
which mainly reflects the status code and reason phrase, leading to
messages like "200 OK" in such an exception.
This change improves the situation by appending a hint at the underlying
cause whenever getMessage() is called on a WebClientResponseException
which was created with a non-error status code.
Closes gh-33127
This change ensures that the cache error handler is used in case of
future-based or publisher-based asynchronous caching completing with an
exception.
Closes gh-33073
Prior to this commit, the fix for gh-32730 disabled the involvment of
the osbervation filter for async dispatches. Instead of relying on ASYNC
dispatches to close the observation for async requests, this is now
using an async listener instead: async dispatches are not guaranteed to
happen once the async request is handled.
This change caused another side-effect: because async dispatches are not
considered anymore by this filter, the observation scope is not
reinstated for async dispatches. For example, `ResponseBodyAdvice`
implementations do not have the observation scope opened during their
execution.
This commit re-enables async dispatches for this filter, but ensures
that observations are not closed during such dispatches as this will be
done by the async listener.
Fixes gh-33091
Fix argument in call to applyReturnValueValidation()
method in MethodValidationInterceptor.java. Method
argument was passed instead of the return value of the
method that was being validated.
See gh-33105
Prior to this commit, the "Method Arguments" documentation for WebFlux
in the reference manual stated that WebFlux controller methods can
accept arguments of type Map, Model, or ModelMap to access the model.
However, ModelMap is actually not supported and results in exception
due to a type mismatch.
This commit updates the documentation to reflect this.
In addition, this commit updates related Javadoc and tests to avoid
mentioning or using ModelMap in WebFlux.
Closes gh-33107
Prior to this commit, the comment in the XML configuration example in
the Method Injection section of the reference manual referred to the
wrong bean names.
Closes gh-33096
Prior to this commit, the `ProtobufMessageConverter` used in messaging
would try and serialize the message payload by calling "toString()" on
it in order to pass it to the Protobuf JSON encoder.
While this works for `String` payloads, this fails for `byte[]` types.
This commit ensures that such `byte[]` are first converted to `String`
instances using the given charset first.
Fixes gh-27408
Prior to this commit, RequestMappingViewResolutionIntegrationTests
invoked the following:
configurer.setTemplateLoaderPath(
"classpath*:org/springframework/web/reactive/view/freemarker/");
However, that configuration is invalid since `classpath*:` is not
supported for a `templateLoaderPath`.
Despite that, the tests still passed since FreeMarkerConfigurer already
registers a new ClassTemplateLoader(FreeMarkerConfigurer.class, ""),
which automatically finds template files in the same package as
FreeMarkerConfigurer (for the "spring.ftl" macro library support) and
coincidentally RequestMappingViewResolutionIntegrationTests as well
(which resides in the same package).
This commit therefore removes the invalid configuration and adds a
comment to explain what's going on.
Prior to this commit, the fix for gh-32575 introduced cases where the
client observation would be stopped twice.
This commit ensures that `RestClient` observations are stopped only once
when the response is closed, or before throwing an unhanlded exception.
Fixes gh-33068
Prior to this commit, the isClientDisconnectedException() method in
DisconnectedClientHelper checked whether the message of the ultimate
exception in an exception chain contained one of the phrases "broken
pipe" or "connection reset by peer". However, that failed to match if
the exception message contained "Connection reset", which is the case
for the SocketException thrown by throwConnectionReset() in
sun.nio.ch.SocketChannelImpl.
This commit therefore replaces the "connection reset by peer" phrase
with "connection reset" in order to support all exception messages
containing "connection reset".
Closes gh-33064
This commit changes the use of HttpSessionRequiredException in
ModelFactory::initModel to an IllegalStateException, because the former
extends ServletException and cannot be used in WebFlux.
Closes gh-33043
Prior to this commit, the `ContentCachingRequestWrapper` could allocate
a `FastByteArrayOutputStream` block that was larger than the content
cache limit given as a consturctor argument. This was due to an
optimization applied in gh-31834 for allocating the right content cache
size when the request size is known.
Fixes gh-32987
Prior to this commit, the `ServerHttpObservationFilter` would support
async dispatches and would do the following:
1. start the observation
2. call the filter chain
3. if async has started, do nothing
4. if not in async mode, stop the observation
This behavior would effectively rely on Async implementations to
complete and dispatch the request back to the container for an async
dispatch. This is what Spring web frameworks do and guarantee.
Some implementations complete the async request but do not dispatch
back; as a result, observations could leak as they are never stopped.
This commit changes the support of async requests. The filter now
opts-out of async dispatches - the filter will not be called for those
anymore. Instead, if the application started async mode during the
initial container dispatch, the filter will register an AsyncListener to
be notified of the outcome of the async handling.
Fixes gh-32730
Commit d7970e4ab8 introduced support for JAXBElement in
Jaxb2XmlEncoder's encodeValue() method; however, canEncode() still
returned false for a JAXBElement element type.
This commit revises canEncode() so that it returns true for an element
type that is assignable from JAXBElement.
See gh-30552
See gh-32972
Closes gh-32977
Prior to this commit, #31870 added support for constraint annotations on
container elements for handler method argument validation. Supporting
this use case:
```
public void addNames(List<@NotEmpty String> names)
```
This commit does the same for `@Valid` annotation:
```
public void addPeople(List<@Valid Person> people)
```
Fixes gh-32964
This commit updates
PersistenceManagedTypesBeanRegistrationAotProcessor
in order to infer hints for Hibernate annotations meta
annotated with `@ValueGenerationType` (like `@CreationTimestamp`)
and `@IdGeneratorType`.
`@GenericGenerator` is not supported as it is deprecated as of
Hibernate 6.5.
Closes gh-32842
Prior to this commit, the Spring Expression Language (SpEL) failed to
compile an expression that indexed into a Map using a primitive literal
(boolean, int, long, float, or double).
This commit adds support for compilation of such expressions by
ensuring that primitive literals are boxed into their corresponding
wrapper types in the compiled bytecode.
Closes gh-32903
Prior to this commit, the Spring Expression Language (SpEL) failed to
compile an expression that indexed into any array or list using an
Integer.
This commit adds support for compilation of such expressions by
ensuring that an Integer is unboxed into an int in the compiled
bytecode.
See gh-32694
Closes gh-32908
Prior to this commit, the Gradle build issued the following warning.
- The deprecated "gradleEnterprise.buildScan.value" API has been
replaced by "develocity.buildScan.value"
- Use same playbook as docs-build
- Use Env Variables to cause partial build (same as docs-build)
- Use package.json so that dependencies can be updated with dependabot
Includes JAXBContext locking revision (avoiding synchronization) and consistent treatment of DocumentBuilderFactory (in terms of caching as well as locking).
Closes gh-32851
This commit updates Spring AOT to suppress a deprecation warning for
a generic type that has a deprecated element. Previously we only were
checking for the raw class.
Closes gh-32850
This commit avoids several instances of MockHttpServletRequest to
have a common reader for empty content as closing it will have an
unwanted side effect on the others.
Closes gh-32820
Prior to this commit, the `ReactiveTypeHandler` would handle `Flux`-like
return types from controller methods and adapt them to SSE streams using
the `SseEmitter`/`ResponseBodyEmitter` APIs. In case an `IOException` is
thrown while writing to the HTTP response stream, the
`ReactiveTypeHandler` would rely on the Servlet container to call
`AsyncListener#onError` - this would be the signal for Spring MVC to
complete the async exchange. To prevent racing issues between this
signal and the actual handling of the exception, changes like gh-20173
were applied. Since then, robust checks were added with gh-32340 in
`StandardServletAsyncWebRequest.LifecycleHttpServletResponse`.
With Jetty 12, `AsyncListener#onError` would not be called as the error
would happen while writing in blocking mode to the response (so, not
using the Servlet WriteListener contract). But still, such `IOException`
would still result in the closing of the HTTP connection. As of Jetty
12.0.4, this is no longer the case and the party managing the async
lifecycle is in charge of completing the exchange, as it should. This
means that the current behavior leaks HTTP connections for these cases
and causes memory issues.
This commit ensures that such exceptions happening during response
writes are caught and result in the completion of the `SSEEmitter` and
the closing of the exchange. Even if other Servlet containers still
propagate the error `AsyncListener#onError`, competing signals are still
managed with gh-32340.
Closes gh-32629
This commit fixes links from Spring Framework's Dokka HTML to Javadoc
for Spring Framework and Servlet APIs by explicitly configuring the
`element-list` page as the `package-list` in the Dokka Gradle plugin.
Closes gh-32797
A bug has existed in Spring's MergedAnnotations support since it was
introduced in Spring Framework 5.2. Specifically, if the
MergedAnnotations API is used to search for annotations with "standard
repeatable annotation" support enabled (which is the default), it's
possible to search for a repeatable annotation but not for the
repeatable annotation's container annotation.
The reason is that MergedAnnotationFinder.process(Object, int, Object,
Annotation) does not process the container annotation and instead only
processes the "contained" annotations, which prevents a container
annotation from being included in search results.
In #29685, we fixed a bug that prevented the MergedAnnotations support
from recognizing an annotation as a container if the container
annotation declares attributes other than the required `value`
attribute. As a consequence of that bug fix, since Spring Framework
5.3.25, the MergedAnnotations infrastructure considers such an
annotation a container, and due to the aforementioned bug the container
is no longer processed, which results in a regression in behavior for
annotation searches for such a container annotation.
This commit addresses the original bug as well as the regression by
processing container annotations in addition to the contained
repeatable annotations.
See gh-29685
Closes gh-32731
Prior to this commit, HTTP requests sent with the
`HttpComponentsClientHttpRequestFactory` would not set a
"Content-Length" header for empty request bodies. Setting a request
entity is the expected behavior for unsafe HTTP methods, and this would
align the behavior with other HTTP clients.
Developers would often rely on `BufferingClientHttpRequestFactory` to
set this information on the request.
This commit ensures that a `NullEntity` is used for unsafe HTTP methods,
when no body has been set for the request. This result in a
"Content-Length:0" request header.
Fixes gh-32678
This commit changes the guard against multiple subscriptions, as the
previously used doOnSubscribe hook could not function as guard in
certain scenarios.
Closes gh-32727
This commit counterbalances the retain in the MessagingRSocket
handleConnectionSetupPayload method with a conditional release on SETUP
frame type in handleNoMatch, preventing Netty buffer leaks.
Closes gh-32424
This commit refines the preDetermineBeanTypes algorithm that AOT uses
to approximate the order of preInstantiateSingletons more closely.
Previously, the algorithm assumed that all beans where non-lazy
singletons in terms of initialization order, which led to inconsistent
order in CGLIB proxy generation.
We now explicitly park lazy beans so that their types are determined
during a second phase, matching the order of regular initialization
order.
Closes gh-32669
Co-authored-by: Juergen Hoeller <juergen.hoeller@broadcom.com>
Previously, a UriComponents build based on a method would require the
given method to be the annotated one as method parameter resolution only
applied locally. This was a problem when a controller was specified on
a method whose mapping is defined in a parent.
This commit harmonies the lookup using AnnotatedMethod who provides
support for a synthesized method parameter that takes annotations from
parent parameter into account.
Closes gh-32553
Previously, a BeanDefinition that has an instance supplier would be
used irrespective of custom arguments being provided. This commit only
applies the instance supplier if no arguments are provided. With
custom arguments, the regular lookup takes place based on the
information provided in the bean factory.
Closes gh-32657
Previously, if a factory method is defined on a parent, the generated
code would blindly use the method's declaring class for both the target
of the generated code, and the signature of the method.
This commit improves the resolution by considering the factory metadata
in the BeanDefinition.
Closes gh-32609
Prior to this commit, `RestClientException` thrown by status handlers
would not be registered as observation errors. This commit ensures that
such exceptions are first caught, registered in the observation and
rethrown as expected.
Closes gh-32575
Prior to this commit, the `RestClient` observations would be stopped as
soon as the exchange function was called. This means that all errors
related to response decoding or mapping would not be recorded by the
obsevations.
This commit extends the observation recording to the `ResponseSpec` DSL
calls as well as custom exchange functions.
Fixes gh-32575
Prior to this commit, the `BufferingClientHttpRequestFactory`, through
the `AbstractBufferingClientHttpRequest`, would set a "Content-Length"
header value, even if the buffered body was empty.
This behavior is invalid since no request body would be set by the
client code in the first place.
This commit ensures that this header is only set if a request body has
been buffered and is about to be written to the request.
Fixes gh-32650
This commit rephrases the `DefaultTransactionDefinition#setTimeout`
exception message to better reflect the fact that 0 is a valid input
value.
Even though this often leads to a transaction immediately timing out
after opening, there is one notable case where this has another
meaningful effect: in Jakarta transactions (`UserTransaction`), when
passing 0 "the transaction service restores the default value".
Closes gh-32635
This change improves the message of several parsing-related exceptions
that would previously entirely swallow the original exception's message
and sometimes have a slightly misleading message as a result.
This is done by appending the cause's `toString` representation to the
IllegalArgumentException messages instead of an hardcoded "cause".
Closes gh-32636
Before this change temporary files would not consistently be deleted
when the connection which uploads the multipart files closes naturally.
This change uses the usingWhen Reactor operator to ensure that the
termination of the connection doesn't prevent individual file parts
from being deleted due to a cancellation signal.
Closes gh-31217
This commit refines the expressions for the scheme, user info, host and
port parts of the URL in UriComponentsBuilder to better conform to
RFC 3986.
Fixes gh-32616
Prior to this commit, `BufferingClientHttpRequestWrapper` would always
write to the actual client request body, even if the buffered content
was empty (empty byte array).
This would cause issues with specific client request factories,
especially the OkHttp variant, that would consider empty byte arrays as
non-empty body and would reject such cases for GET requests with an
"IllegalArgumentException: method GET must not have a request body".
This commit only writes to the request if the buffered content is not
empty.
Fixes gh-32612
Prior to this commit, MethodIntrospector failed to properly detect
bridge methods for subsequent invocations of selectMethods() with the
same targetType and MetadataLookup, if such subsequent invocations
occurred after the ApplicationContext had been refreshed.
The reason this occurs is due to the following.
- Class#getDeclaredMethods() always returns "child copies" of the
underlying Method instances -- which means that `equals()` should be
used instead of `==` whenever the compared Method instances can come
from different sources (such as the static caches mentioned below).
- BridgeMethodResolver caches resolved bridge methods in a static cache
-- which is never cleared.
- ReflectionUtils caches declared methods in a static cache
-- which gets cleared when an ApplicationContext is refreshed.
Consequently, if you attempt to load an ApplicationContext twice in the
same ClassLoader, the second attempt uses the existing, populated cache
for bridged methods but a cleared, empty cache for declared methods.
This results in new invocations of Class#getDeclaredMethods(), and
identity checks with `==` then fail to detect equivalent bridge methods.
This commit addresses this by additionally comparing bridge methods
using `equals()` in MethodIntrospector.selectMethods().
Note that the `==` checks remain in place as an optimization for when
`equals()` is unnecessary.
Closes gh-32586
Prior to this commit, the `JmsTemplate#sendAndReceive` method would not
instrument the JMS session. This means that no metric would be recorded
when sending the message and no trace would be propagated downstream.
This commit ensures that the JMS session is instrumented in this case as
well. Note, the reception of the response message does not create a
`"jms.message.process"` observation as the session is only receiving the
message, no listener has been configured on the message consumer.
Fixes gh-32606
This commit ensures that the response body is drained and closed when
the response itself is closed, instead of disposing the connection, as
this will disable the connection pool.
Closes gh-32528
This commit reverts some null-safety changes which make sense
on main but are too impactful for 6.1.x for Kotlin developers
using -Xjsr305=strict.
See gh-32475
This commit ensures that `InvocableHandlerMethod` executes the method
on the desired thread if a non-blocking thread is specified, even in the
case where arguments resolution happens on a different thread. This is
notably the case if the method body is resolved as an input argument to
the controller method (`@RequestBody`).
Closes gh-32502
Prior to this commit, SpEL's CompoundExpression omitted the null-safe
syntax in AST string representations of the selection and projection
operators.
To address this, this commit implements isNullSafe() in Projection and
Selection.
Closes gh-32515
Prior to this commit, MethodReference and PropertyOrFieldReference
already defined local isNullSafe() methods, but we need identical
methods in Selection, Projection, and Indexer, and we may potentially
need null-safe support for additional operators in the future.
To address the common need for an is-null-safe check, this commit
introduces an isNullSafe() method in SpelNodeImpl with a default
implementation that returns false.
Closes gh-32516
The fix for #31254 resulted in an InvalidMimeTypeException being thrown
by MimeTypeUtils.sortBySpecificity() instead of an
IllegalArgumentException. However, InvalidMimeTypeException extends
IllegalArgumentException. Consequently, the change from
IllegalArgumentException to InvalidMimeTypeException did not result in
the desired effect in HeaderContentNegotiationStrategy.
HeaderContentNegotiationStrategy.resolveMediaTypes() still allows the
InvalidMimeTypeException to propagate as-is without wrapping it in an
HttpMediaTypeNotAcceptableException.
To address this issue, this commit catches InvalidMediaTypeException
and InvalidMimeTypeException in HeaderContentNegotiationStrategy and
wraps the exception in an HttpMediaTypeNotAcceptableException.
See gh-31254
See gh-31769
Closes gh-32483
There is no way to consistently test this use case because listener
container implementations have different behavior for unhandled errors
and might retry or close the container altogether.
See gh-32458
Prior to this commit, when using the `DefaultMessageListenerContainer`
as a backing listener container for JMS messages, the instrumentation
would not record JMS exceptions as observation errors when they were not
handled by configured `ErrorHandler`.
This commit ensures that this is the case.
Fixes gh-32458
Prior to this commit, gh-31609 added the current observation context as
a request attribute for `WebClient` calls. While it was not confirmed as
the main cause, this feature was linked to several reports of memory
leaks. This would indeed attach more memory to the request object graph
at runtime - although it shouldn't prevent its collection by the GC.
This commit removes this feature and instead developers should get the
current observation from the reactor context if they wish to interact
with it.
Closes gh-32198
Prior to this commit, error signals flowing from the client response
publisher in `WebClient` would be set on the `Observation.Context`. This
is enough for the observation convention to collect data about the error
but observation handlers are not notified of this error.
This commit sets the error instead on the observation directly to fix
this issue.
Fixes gh-32389
webmvc.fn now also uses the StandardServletAsyncWebRequest wrapped response
to enforce lifecycle rules from Servlet spec (section 2.3.3.4).
See gh-32340
KClass instantiation in CoroutinesUtils is suboptimal, and should be
replaced by KTypes#isSubtypeOf checks using pre-instantiated types for
Flow, Mono and Publisher.
This commit impact on performances is significant since a throughput
increase between 2x and 3x has been measured on basic endpoints.
Closes gh-32390
This commit fixes an issue where a Cacheable method which returns a
Flux (or multi-value publisher) will be invoked once, but the returned
publisher is actually subscribed twice.
The previous fix 988f3630c would cause the cached elements to depend on
the first usage pattern / request pattern, which is likely to be too
confusing to users. This fix reintroduces the notion of exhausting the
original Flux by having a second subscriber dedicated to that, but uses
`refCount(2)` to ensure that the original `Flux` returned by the cached
method is still only subscribed once.
Closes gh-32370
Also fix a couple of related issues:
- add AsyncRequestNotUsableException to the list of exceptions
that imply response issues.
- handle exceptions from @ExceptionHandler regardless of whether
thrown immediately or via Publisher.
Closes gh-32359
This commit fixes an issue where a Cacheable method which returns a
Flux (or multi-value publisher) will be invoked once, but the returned
publisher is actually subscribed twice.
By using the Reactor `tap` operator, we ensure that we can emit values
downstream AND accumulate emitted values into the List with a single
subscription.
The SignalListener additionally handles scenarios involving cancel,
for instance in case of a `take(1)` in the chain. In that case values
emitted up until that point will have been stored into the List buffer,
so we can still put it in the cache. In case of error, no caching occurs
and the internal buffer is cleared. This implementation also protects
against competing onComplete/onError signals and cancel signals.
Closes gh-32370
The following adjustments are also made as a result:
- Use int to check if lock is held and unlock is needed, given that
for non-async requests we don't need to obtain a lock.
- Protect access methods getOutputStream and getWriter with the
same locking and state checks.
Closes gh-32340
ServletResponseHttpHeaders#get should be annotated with `@Nullable` and
return null instead of a singleton list containing null when there is no
content type header.
Closes gh-32362
In addition to using the ServletOutputStream, it's also possible to call
ServletResponse#flushBuffer, so the ServletOutputStream wrapper logic needs
to apply there as well.
See gh-32340
The wrapped response prevents use after AsyncListener onError or completion
to ensure compliance with Servlet Spec 2.3.3.4.
The wrapped response is applied in RequestMappingHandlerAdapter.
The wrapped response raises AsyncRequestNotUsableException that is now
handled in DefaultHandlerExceptionResolver.
See gh-32340
Prior to this commit, if a Spring Expression Language (SpEL) expression
referenced the root context object via the #root or #this variable, we
inserted a checkcast in the generated byte code that cast the object to
its concrete type. However if the root context object's type was
non-public, that resulted in an IllegalAccessError when the compiled
byte code was executed.
VariableReference.getValueInternal() already contains a solution for
global variables which inserts a checkcast to Object in the generated
byte code instead of to the object's concrete non-public type.
This commit therefore applies the same logic to #root (or #this when
used to reference the root context object) that is already applied to
global variables.
Closes gh-32356
This commit refines WebMVC and WebFlux argument resolution in order to
convert properly Kotlin value class arguments by using the type of the
value instead of the type of the value class.
Closes gh-32353
The HttpHeaders.getAcceptLanguageAsLocales was incurring overhead from
using a Stream, as well as calling the fairly expensive
Locale.getDisplayName method.
Switch to using an ArrayList, and skipping over wildcard ranges to avoid
needing to check the display name.
Closes gh-32318
This commit fixes a performance regression caused by gh-31698,
and more specifically by KClass#isValue invocations which are slow since
they load the whole module to find the class to get the descriptor.
After discussing with the Kotlin team, it has been decided that only
checking for the presence of `@JvmInline` annotation is enough for
Spring use case.
As a consequence, this commit introduces a new
KotlinDetector#isInlineClass method that performs such check, and
BeanUtils, CoroutinesUtils and WebMVC/WebFlux InvocableHandlerMethod
have been refined to leverage it.
Closes gh-32334
For consistency with other examples, this commit omits `method` parameter
names in the "Migrating from RestTemplate to RestClient" section of the
reference docs.
Closes gh-32335
Based on feedback from several members of the community, we have
decided to revert the caching of the Content-Type header that was
introduced in ContentCachingResponseWrapper in 375e0e6827.
This commit therefore completely removes Content-Type caching in
ContentCachingResponseWrapper and updates the existing tests
accordingly.
To provide guards against future regressions in this area, this commit
also introduces explicit tests for the 6 ways to set the content length
in ContentCachingResponseWrapper and modifies a test in
ShallowEtagHeaderFilterTests to ensure that a Content-Type header set
directly on ContentCachingResponseWrapper is propagated to the
underlying response even if content caching is disabled for the
ShallowEtagHeaderFilter.
See gh-32039
Closes gh-32317
Prior to this commit, getHeaderNames() returned duplicates for the
Content-Type and Content-Length headers if they were set in the wrapped
response as well as in ContentCachingResponseWrapper.
This commit fixes that by returning a unique set from getHeaderNames().
In addition, this commit introduces a new test in
ContentCachingResponseWrapperTests to verify the expected behavior for
Content-Type and Content-Length headers that are set in the wrapped
response as well as in ContentCachingResponseWrapper.
See gh-32039
See gh-32317
Commit 375e0e6827 introduced a regression in
ContentCachingResponseWrapper (CCRW). Specifically, CCRW no longer
honors Content-Type and Content-Length headers that have been set on
the wrapped response and returns null for those header values if they
have not been set directly on the CCRW.
This commit fixes this regression as follows.
- The Content-Type and Content-Length headers set in the wrapped
response are honored in getContentType(), containsHeader(),
getHeader(), and getHeaders() unless those headers have been set
directly on the CCRW.
- In copyBodyToResponse(), the Content-Type in the wrapped response is
only overridden if the Content-Type has been set directly on the CCRW.
See gh-32039
Closes gh-32317
This commit adapts Hibernate native support to handle
the changes performed as part of HHH-17643 which impacts
Hibernate versions 6.4.3+ and 6.2.21+.
It ignores the BytecodeProvider services loaded by the
service loader feature in order to default to the
"no-op" provider with native, and makes the substitutions
more lenient when a substituted field or method does not
exist.
gh-32314 is expected to remove the need for such
substitutions which are not great for maintainability
by design.
Closes gh-32311
This commit revisits the improved detection algorithm for stored
procedure as, unfortunately, certain JDBC drivers do not support
the documented pattern for schema and procedure name.
To work around this limitation, this commit applies the escaping of
wildcard characters to the case where multiple procedures have been
found for a given search.
Closes gh-32295
Delegate to the spliterator method of the underlying collection in
MutablePropertyValues and MutablePropertySources. In both cases, those
collection types have specialized Spliterator implementations.
Delegating to these Spliterators also means the characteristics of the
Spliterator are properly set.
See gh-32281
Prior to this commit, the SseBuilder API in WebMvc.fn would only allow
to send Server-Sent Events with `data:` items in them. The spec doesnn't
disallow this and other specifications rely on such patterns to signal
the completion of a stream, like:
```
event:next
data:some data
event:complete
```
This commit adds a new `send()` method without any argument that sends
the buffered content (id, event comment and retry) without data.
Fixes: gh-32270
Although EvaluationContext defines the API for setting and looking up
variables, the internals of the Spring Expression Language (SpEL)
actually provide explicit support for registering functions as
variables.
This is self-evident in the two registerFunction() variants in
StandardEvaluationContext; however, functions can also be registered as
variables when using the SimpleEvaluationContext.
Since custom functions are also viable in use cases involving the
SimpleEvaluationContext, this commit documents that functions may be
registered in a SimpleEvaluationContext via setVariable().
This commit also explicitly documents the "function as a variable"
behavior in the class-level Javadoc for both StandardEvaluationContext
and SimpleEvaluationContext, as well as in the reference manual.
Closes gh-32258
This notably enables Jackson to reflectively call a user-provided
builder class and invoke its declared methods (setters and build) in
a native app.
Closes gh-32238
The cancellation of read and write inactivity tasks was done via
WebSocketHandler#afterConnectionClosed, relying on the WebSocket
library to always invoke the callback.
This change moves the cancellation to the `close` method instead
that in turn is called from DefaultStompSession#resetConnection,
in effect making the cancellation more proactive and aligned with
connection cleanup in DefaultStompSession vs relying on a
subsequent call from the WebSocket library after the connection
is closed.
Closes gh-32195
ConnectionLostException was applies only after the WebSocket library
notified us of a session close. However, read inactivity and heartbeat
send failures are also cases of the connection being lost rather than
closed intentionally.
This commit also ensures resetConnection is called after a heartbeat
write failure, consistent with other places where a transport error
is handled that implies the connection is lost.
See gh-32195
This commit focuses on improving the AOT section on programmatic
registration of additional beans. This makes it more clear that a
`BeanDefinitionRegistry` must be used and that singletons are not
processed.
Closes gh-32240
Closes gh-32241
This commit introduces new HTTP method, Content-Type, and Accept header
request predicates that handle single values. Previously, these
predicates were always dealt with as single-value collections, which
introduced computational overhead.
Closes gh-32244
Previously, RestClientAdapter claimed that it supports request
attributes when, in fact, it does not. This commit updates the
implementation accordingly.
See gh-32232
Schedulers remain strict, just plain executors are lenient on shutdown now.
An early shutdown for executors can be enforced via setStrictEarlyShutdown.
Closes gh-32226
Fix another instance where a LinkedHashMap was initialized with an initial
capacity that would always cause a resize / rehash to occur. Switch to
CollectionUtils.newLinkedHashMap to size the map appropiately for the expected
number of items.
Closes gh-32215
Prior to this commit, the `RequestPredicates` would add new attributes
to the existing request attributes by creating a new `LinkedHashMap`
with the total number of elements as its new initial capacity.
This would not achieve optimal performance as initial resize or rehash
operations could be expected. Consistently using
`CollectionUtils#newLinkedHashMap` avoids this problem.
Closes gh-32201
ServletAttributesMap inherited default implementations of the size
and isEmpty methods from AbstractMap which delegates to the Set returned
by entrySet. ServletAttributesMap's entrySet method made this fairly
expensive, since it would copy the attributes to a List, then use a
Stream to build the Set. To avoid the cost, add implementations of
isEmpty / size that don't need to call entrySet at all.
Additionally, change entrySet to return a Set view that simply lazily
delegates to the underlying servlet request for iteration.
Closes gh-32189
This commit ensures that, when creating a RestClient.Builder from a
RestTemplate, the UriBuilderFactory is only copied if it has been
changed from the default values.
Before this commit, the UriBuilderFactory was effectively alway copied,
resulting in not being able to use a baseUrl.
This commit also introduces a small memory optimization in
DefaultUriBuilderFactory, so that default environment variables are
created lazily.
Closes gh-32180
This commit replaces occurrences of modelAttribitePredicate with modelAttributePredicate
in HandlerMethodValidationException and the associated validator.
Closes gh-32183
As a bit of trivia, Jakarta EL was originally Unified EL, which was
originally JSP EL, which was originally SPEL.
SPEL: Simplest Possible Expression Language
SpEL: Spring Expression Language
So one could say that SPEL inspired SpEL.
This commit introduces a globally applied Checkstyle rule which
enforces the use of class literals for primitive types and void by
forbidding the use of the TYPE constants in Boolean, Character, Byte,
Short, Integer, Long, Float, Double, and Void.
For example, if MyClass uses one of the TYPE constants, the build will
now fail with a message similar to the following.
[ERROR] <...>/MyClass.java:39: Please use class literals for primitives and void -- for example, int.class instead of Integer.TYPE.
This commit improves PersistenceManagedTypesBeanRegistrationAotProcessor
so that it does not attempt to load JPA classes when checking for the
presence of a PersistenceManagedTypes bean. To make it more clear a
check on the presence for JPA has been added to prevent the nested
classes to be loaded regardless of the presence of the bean.
Closes gh-32155
To improve consistency and avoid confusion regarding primitive types
and their wrapper types, this commit ensures that we always use class
literals for primitive types.
For example, instead of using the `Void.TYPE` constant, we now
consistently use `void.class`.
Prior to this commit, SpEL's Indexer incorrectly requested conversion
to wrappers instead of primitives when setting an element in a
primitive array.
This commit addresses this by requesting primitive conversion -- for
example, conversion to `int.class` instead of `Integer.class` when
setting a value in an `int[]` array.
For greater clarity, this commit also switches from using `TYPE`
constants in wrapper classes to primitive class literals -- for
example, from `Integer.TYPE` to `int.class`.
Closes gh-32147
Since SpEL is no longer "in progress", this commit removes the obsolete
InProgressTests class and moves all non-duplicated test cases to other
test classes.
This commit harmonizes SimpleJdbcCall and SimpleJdbcInsert to
consistently use a catalog name if one is set. Previously,
SimpleJdbcInsert only used the catalog name to retrieve database
metadata.
Closes gh-32124
Prior to this commit, only the MethodFilter and ConstructorResolver
functional SPIs in the org.springframework.expression package were
annotated with @FunctionalInterface.
For consistency, this commit designates each of the following
functional SPIs in that package as a @FunctionalInterface as well.
- BeanResolver
- ConstructorExecutor
- MethodExecutor
- MethodResolver
Closes gh-32135
This commit introduces a new method to configure an existing
TaskExecutor in ChannelRegistration. Contrary to
TaskExecutorRegistration, a ThreadPoolTaskExecutor is not necessary,
and it can't be further configured. This includes the thread name
prefix.
Closes gh-32081
Before this commit, the JDK and Jetty connectors do not have any
safeguards against multiple body subscriptions. Such as check has now
been added.
Closes gh-32100
Since the bug in JDK 22-ea builds has been fixed [1], this commit
re-enables the disabled tests.
Verified using: OpenJDK Runtime Environment (build 22-ea+31-2314)
[1] https://bugs.openjdk.org/browse/JDK-8322214
The behavior for the toString() implementation for annotations changed
in JDK 19, per my request to the JDK team (see link below).
Specifically, since JDK 19, the toString() implementation for annotation
proxies created by the JDK started using canonical names instead of
binary names for types.
See https://bugs.openjdk.org/browse/JDK-8281462
Prior to this commit, the `RestTemplate` observation instrumentation
would only record `RestClientException` and `IOException` as errors in
the observation. Other types of errors can be thrown by custom
components, such as `ResponseErrorHandler` and in this case they aren't
recorded with the observation.
Also, the current instrumentation does not create any observation scope
around the execution. While this would have a limited benefit as no
application code is executed there, developers could set up custom
components (such as, again, `ResponseErrorHandler`) that could use
contextual logging with trace ids.
This commit ensures that all `Throwable` are recorded as errors with the
observations and that an observation `Scope` is created around the
execution of the client exchange.
Fixes gh-32060
This commit revises the RequestMappingHandlerMapping implementations in
Spring MVC and Spring WebFlux to ensure that a @Controller class which
implements an interface annotated with @HttpExchange annotations can
inherit the @HttpExchange declarations from the interface or
optionally override them locally with @HttpExchange or
@RequestMapping annotations.
Closes gh-32065
This commit updates the RequestMappingHandlerMapping implementations in
Spring MVC and Spring WebFlux so that mixed @RequestMapping and
@HttpExchange declarations on the same element are rejected.
Note, however, that a @Controller class which implements an interface
annotated with @HttpExchange annotations can still inherit the
@HttpExchange declarations from the interface or optionally override
them locally with @HttpExchange or @RequestMapping annotations.
See gh-31962
See gh-32049
Closes gh-32065
This commit makes sure that, when building a RestClient based on the
configuration of a RestTemplate, the request factory is unwrapped if it
is a InterceptingClientHttpRequestFactory.
Closes gh-32038
This commit ensures that setting the Content-Length through
setHeader("Content-Length", x") has the same effect as calling
setContentLength in the ShallowEtagHeaderFilter. It also filters out
Content-Type headers similarly to Content-Length.
Closes gh-32039
This commit updates the RequestMappingHandlerMapping implementations in
Spring MVC and Spring WebFlux so that multiple @HttpExchange
declarations on the same element are rejected.
Closes gh-32049
If multiple request mapping annotations are discovered, Spring MVC and
Spring WebFlux now log a warning similar to the following (without
newlines).
Multiple @RequestMapping annotations found on
void org.example.MyController.put(), but only the first will be used:
[
@org.springframework.web.bind.annotation.PutMapping(consumes={}, headers={}, name="", params={}, path={"/put"}, produces={}, value={"/put"}),
@org.springframework.web.bind.annotation.PostMapping(consumes={}, headers={}, name="", params={}, path={"/put"}, produces={}, value={"/put"})
]
Closes gh-31962
Prior to this commit, the alias resolution error message in
SimpleAliasRegistry was misleading.
When a resolution conflict is detected, the IllegalStateException
thrown by resolveAliases(...) now states that the resolved alias is
already registered for an `existingName` instead of the `registeredName`.
See gh-31353
Closes gh-32025
This commit improves SimpleAliasRegistryTests in the following ways.
- Some existing methods have been split up into smaller test methods
which focus on a single use case.
- The use of Mockito mocks has been replaced by a hand-crafted
StubStringValueResolver which ensures that existing aliases and names
are not accidentally replaced by null thereby removing their removing
there mappings inadvertently.
- Several test methods now include inline comments that document the
current state of the aliasMap in order to clarify what is happening
behind the scenes in the ConcurrentHashMap.
- Several test methods warn that the current expectations are based on
ConcurrentHashMap iteration order!
- New @ParameterizedTest which is currently @Disabled but
demonstrates that complex use cases involving placeholder replacement
can be supported consistently -- regardless of the values of the
aliases involved -- but only if alias registration order is honored.
Closes gh-31353
This commit documents the following Spring properties in the reference
manual.
- spring.aot.enabled
- spring.cache.reactivestreams.ignore
- spring.classformat.ignore
- spring.context.checkpoint
- spring.context.exit
Closes gh-31987
This commit updates ContentRequestMatchers#multipartData
Javadoc to mention Tomcat fork of Commons FileUpload library
instead of the original variant.
It also adds a similar note to
ContentRequestMatchers#multipartDataContains.
Closes gh-31988
ResponseEntityExceptionHandler should not set the exception attribute
when there is a response body, and the response is fully handled.
Closes gh-31541
This commit introduces support for a Spring property named
`spring.context.expression.maxLength`. When set, the value of that
property is used internally in StandardBeanExpressionResolver to
configure the SpelParserConfiguration used when evaluating String
values in bean definitions, @Value, etc.
Closes gh-31952
This change moves container element properties from ParameterErrors
to base class ParameterValidationResult, and makes that support
independent of whether violations are nested within a container
element bean or through constraints on container elements, e.g.
`List<@NotBlank String>`.
Closes gh-31887
This is able to resolve the original method even if no bridge method has been generated at the same class hierarchy level (a known difference between the Eclipse compiler and regular javac).
Closes gh-21843
Includes TypeVariable bypass for reflection-free annotation retrieval.
Includes info log message for annotation attribute retrieval failure.
Closes gh-27182
This commit adds CORS support for Private Network Access
by adding an Access-Control-Allow-Private-Network response
header when the preflight request is sent with an
Access-Control-Request-Private-Network header and that
Private Network Access has been enabled in the CORS
configuration.
See https://developer.chrome.com/blog/private-network-access-preflight/
for more details.
Closes gh-28546
This commit makes sure to resolve placeholders in request mappings
using the EmbeddedValueResolver of the current WebApplicationContext.
To avoid retrieving the context too often, we check for the presence of
the standard placeholder prefix.
Closes gh-26795
To align with the existing processInjection() method in
AutowiredAnnotationBeanPostProcessor, this commit introduces an analogous
method in CommonAnnotationBeanPostProcessor.
Closes gh-31956
This commit implements Cookie support in WebFlux without any workaround
as now all supported servers have the SameSite feature enabled.
Closes gh-31954
Includes differentiation between lenient and fixed execution.
Includes default time zone resolution from scheduler-wide Clock.
Closes gh-19475
Closes gh-31948
Prior to this commit, the `HandlerMappingIntrospector` would comparea
request with a cached request by using `String#matches` on their String
URI. This could lead to `PatternSyntaxException` exceptions at runtime
if the request URI contained pattern characters.
This commit fixes this typo to use `String#equals` instead.
Fixes gh-31937
This commit updates the description of RequestHandledEvent to avoid
providing a misleading status as the absence of a failure logs OK which
can be inaccurate.
Closes gh-27595
This commit adds Javadoc to the `getContentLength` method of
`MockHttpServletResponse` to reflect that it gets its value from the
HTTP response header.
Closes gh-31833
This commit adds a functional style registration of an application
listener for a particular event. Rather than introducing another method
at the ConfigurableApplicationContext interface level, this commit
provides a factory method in GenericApplicationListener.
Closes gh-21411
Prior to this commit, the `DefaultScheduledTaskObservationConvention`
would fail as it tried to add a `KeyValue` to the observation context
that is `null`. This is rejected by the observation registry and should
be prevented. This happened when registered scheduled methods were
lambdas or part of anonymous classes. Those types do not have a
canonical name and return `null` as a value there.
This commit ensures that for these cases, the default convetion uses a
`"ANONYMOUS"` value as the `"code.namespace"` keyvalue.
Fixes gh-31918
Upgrading leads to to WebClientIntegrationTests to fail with Jetty and
the build does not complete properly. This commit reverts the upgrade.
See gh-31931
* pr/31916:
Upgrade copyright year of changed files
Polish "Replace if with switch where feasible"
Replace if with switch where feasible
Use Map.computeIfAbsent() where feasible
Polish "Use Object.equals() where feasible"
Use Object.equals() where feasible
Polish "Use diamond operator where feasible"
Use diamond operator where feasible
Use auto boxing and unboxing where feasible
Use enhanced for loop where feasible
Polish "Use text block where feasible"
Use text block where feasible
Polish "Use String.repeat() where feasible"
Use String.repeat() where feasible
Polish "Remove unnecessary final modifier"
Remove unnecessary final modifier
Closes gh-31916
This commit fixes the Hibernate dialect lookup for SQLServer as it was
previously using a dialect that has been deprecated. In recent
versions, the standard SQLServerDialect is the one we should be using.
Closes gh-31896
Prior to this commit, the `ForwardedHeaderFilter` and the forwarded
header utils would throw `IllegalArgumentException` and
`IllegalStateException` when request headers are invalid and cannot be
parsed for Forwarded handling.
This commit aligns the behavior with the WebFlux counterpart by
rejecting such requests with HTTP 400 responses directly.
Fixes gh-31842
This commit fixes the Hibernate dialect lookup for Oracle as it was
previously using a dialect that has been moved and deprecated to a
separate project. In recent versions, the standard OracleDialect is the
one we should be using.
Closes gh-31892
This commit fixes the Hibernate dialect lookup for MySQL as it was
previously using a deprecated dialect that has been removed in the most
recent Hibernate version.
Closes gh-31889
After the updates to MethodValidationAdapter in commit d7ce13 related
to method validation on element containers, we also need to adjust
the checks in HandlerMethod when method validation applies.
See gh-31746
This commit restores support for Kotlin extensions in
web handlers, and adds support for invoking reflectively
suspending extension functions, as well as the other
features supported as of Spring Framework 6.1 like
value classes and default value for parameters.
Closes gh-31876
The goal for #31530 was to support bean validation on Set and other
method parameters that are containers of value(s) for which there is
a registered Jakarta Validation ValueExtractor.
Unfortunately, bean validation does not expose the unwrapped value
for a Path.Node, which we need for a method parameter in order to
create a BindingResult for the specific bean within the container,
and the leafBean that we tried to use is really the node at the
very bottom of the property path (i.e. not what we need).
This change removes the use of beanLeaf, restores the logic as it
was before, adds support for arrays, and a new test class for
scenarios with cascaded violations.
See gh-31746
Prior to this commit, the `WebHttpHandlerBuilder` would only configure
a custom observation convention if there is a single convention in the
application context. It would other wise use the default.
This commit aligns with the previous Spring Boot behavior where multiple
conventions setups are rejected as invalid with
`NoUniqueBeanDefinitionException`.
Fixes gh-31864
This commit refines InvocableHandlerMethod (both Servlet and
Reactive variants) in order to support annotated property
accessors as they translate into regular Java methods, instead
of throwing a NullPointerException.
Closes gh-31856
DataBinder should skip any jakarta.validation.Validator yielding
to method validation when that is expected. This change improves
the check to skip by unwrapping the validator from in a
SmartValidator before checking if it is for bean validation.
Closes gh-31711
Method validation needs to be used for a container such as a List or
Map, but until now we were only checking for a List container.
Moreover, in gh-31530 we improved method validation to also cover
any Collection.
This change aligns with HandlerMethod check for when method validation
applies with the underlying ability of method validation.
This commit improves JettyWebSocketHandlerAdapter::copyByteBuffer so
that it allocates a buffer large enough for the remaining bytes
contained in the source, instead of allocating one with the capacity of
the source.
Closes gh-31857
This commit updates the JSON writers to use a deterministic order for
arrays. Previously, the order could change with the same content,
breaking caching.
Closes gh-31852
This commit ensures that the capacity of the remainder buffer after a
split operation is set directly on the field. Calling capacity(int)
caused a new buffer to be allocated.
Closes gh-31848
# <img src="framework-docs/src/docs/spring-framework.png" width="80" height="80"> Spring Framework [](https://ci.spring.io/teams/spring-framework/pipelines/spring-framework-6.1.x?groups=Build") [](https://ge.spring.io/scans?search.rootProjectNames=spring)
# <img src="framework-docs/src/docs/spring-framework.png" width="80" height="80"> Spring Framework [](https://github.com/spring-projects/spring-framework/actions/workflows/build-and-deploy-snapshot.yml?query=branch%3A6.1.x) [](https://ge.spring.io/scans?search.rootProjectNames=spring)
This is the home of the Spring Framework: the foundation for all [Spring projects](https://spring.io/projects). Collectively the Spring Framework and the family of Spring projects are often referred to simply as "Spring".
@@ -6,7 +6,7 @@ Spring provides everything required beyond the Java programming language for cre
## Code of Conduct
This project is governed by the [Spring Code of Conduct](CODE_OF_CONDUCT.adoc). By participating, you are expected to uphold this code of conduct. Please report unacceptable behavior to spring-code-of-conduct@pivotal.io.
This project is governed by the [Spring Code of Conduct](CODE_OF_CONDUCT.adoc). By participating, you are expected to uphold this code of conduct. Please report unacceptable behavior to spring-code-of-conduct@spring.io.
## Access to Binaries
@@ -31,7 +31,7 @@ Information regarding CI builds can be found in the [Spring Framework Concourse
## 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 [releases feed](https://spring.io/blog/category/releases).
Follow [@SpringCentral](https://twitter.com/springcentral), [@SpringFramework](https://twitter.com/springframework), and its [team members](https://twitter.com/springframework/lists/team/members) on 𝕏. In-depth articles can be found at [The Spring Blog](https://spring.io/blog/), and releases are announced via our [releases feed](https://spring.io/blog/category/releases).
@@ -15,10 +15,13 @@ Applying such optimizations early implies the following restrictions:
* The classpath is fixed and fully defined at build time.
* The beans defined in your application cannot change at runtime, meaning:
** `@Profile`, in particular profile-specific configuration needs to be chosen at build time.
** `@Profile`, in particular profile-specific configuration, needs to be chosen at build time and is automatically enabled at runtime when AOT is enabled.
** `Environment` properties that impact the presence of a bean (`@Conditional`) are only considered at build time.
* Bean definitions with instance suppliers (lambdas or method references) cannot be transformed ahead-of-time (see related {spring-framework-issues}/29555[spring-framework#29555] issue).
* Make sure that the bean type is as precise as possible.
* Bean definitions with instance suppliers (lambdas or method references) cannot be transformed ahead-of-time.
* Beans registered as singletons (using `registerSingleton`, typically from
`ConfigurableListableBeanFactory`) cannot be transformed ahead-of-time either.
* As we cannot rely on the instance, make sure that the bean type is as precise as
possible.
TIP: See also the xref:core/aot.adoc#aot.bestpractices[] section.
@@ -27,7 +30,7 @@ A Spring AOT processed application typically generates:
* Java source code
* Bytecode (usually for dynamic proxies)
* {spring-framework-api}/aot/hint/RuntimeHints.html[`RuntimeHints`] for the use of reflection, resource loading, serialization, and JDK proxies.
* {spring-framework-api}/aot/hint/RuntimeHints.html[`RuntimeHints`] for the use of reflection, resource loading, serialization, and JDK proxies
NOTE: At the moment, AOT is focused on allowing Spring applications to be deployed as native images using GraalVM.
We intend to support more JVM-based use cases in future generations.
@@ -35,7 +38,7 @@ We intend to support more JVM-based use cases in future generations.
[[aot.basics]]
== AOT engine overview
The entry point of the AOT engine for processing an `ApplicationContext` arrangement is `ApplicationContextAotGenerator`. It takes care of the following steps, based on a `GenericApplicationContext` that represents the application to optimize and a {spring-framework-api}/aot/generate/GenerationContext.html[`GenerationContext`]:
The entry point of the AOT engine for processing an `ApplicationContext` is `ApplicationContextAotGenerator`. It takes care of the following steps, based on a `GenericApplicationContext` that represents the application to optimize and a {spring-framework-api}/aot/generate/GenerationContext.html[`GenerationContext`]:
* Refresh an `ApplicationContext` for AOT processing. Contrary to a traditional refresh, this version only creates bean definitions, not bean instances.
* Invoke the available `BeanFactoryInitializationAotProcessor` implementations and apply their contributions against the `GenerationContext`.
In this mode, xref:core/beans/factory-extension.adoc#beans-factory-extension-factory-postprocessors[`BeanFactoryPostProcessor` implementations] are invoked as usual.
This includes configuration class parsing, import selectors, classpath scanning, etc.
Such steps make sure that the `BeanRegistry` contains the relevant bean definitions for the application.
If bean definitions are guarded by conditions (such as `@Profile`), these are discarded at this stage.
If bean definitions are guarded by conditions (such as `@Profile`), these are evaluated,
and bean definitions that don't match their conditions are discarded at this stage.
If custom code needs to register extra beans programmatically, make sure that custom
registration code uses `BeanDefinitionRegistry` instead of `BeanFactory` as only bean
definitions are taken into account. A good pattern is to implement
`ImportBeanDefinitionRegistrar` and register it via an `@Import` on one of your
configuration classes.
Because this mode does not actually create bean instances, `BeanPostProcessor` implementations are not invoked, except for specific variants that are relevant for AOT processing.
These are:
@@ -84,12 +94,12 @@ Once this part completes, the `BeanFactory` contains the bean definitions that a
Components that want to participate in this step can implement the {spring-framework-api}/beans/factory/aot/BeanFactoryInitializationAotProcessor.html[`BeanFactoryInitializationAotProcessor`] interface.
Each implementation can return an AOT contribution, based on the state of the bean factory.
An AOT contribution is a component that contributes generated code that reproduces a particular behavior.
An AOT contribution is a component that contributes generated code which reproduces a particular behavior.
It can also contribute `RuntimeHints` to indicate the need for reflection, resource loading, serialization, or JDK proxies.
A `BeanFactoryInitializationAotProcessor` implementation can be registered in `META-INF/spring/aot.factories` with a key equal to the fullyqualified name of the interface.
A `BeanFactoryInitializationAotProcessor` implementation can be registered in `META-INF/spring/aot.factories` with a key equal to the fully-qualified name of the interface.
A `BeanFactoryInitializationAotProcessor` can also be implemented directly by a bean.
The `BeanFactoryInitializationAotProcessor` interface can also be implemented directly by a bean.
In this mode, the bean provides an AOT contribution equivalent to the feature it provides with a regular runtime.
Consequently, such a bean is automatically excluded from the AOT-optimized context.
@@ -111,7 +121,7 @@ This interface is used as follows:
* Implemented by a `BeanPostProcessor` bean, to replace its runtime behavior.
For instance xref:core/beans/factory-extension.adoc#beans-factory-extension-bpp-examples-aabpp[`AutowiredAnnotationBeanPostProcessor`] implements this interface to generate code that injects members annotated with `@Autowired`.
* Implemented by a type registered in `META-INF/spring/aot.factories` with a key equal to the fullyqualified name of the interface.
* Implemented by a type registered in `META-INF/spring/aot.factories` with a key equal to the fully-qualified name of the interface.
Typically used when the bean definition needs to be tuned for specific features of the core framework.
WARNING: Kotlin class names with backticks that use invalid Java identifiers (not starting with a letter, containing spaces, etc.) are not supported.
Since there isn't any particular condition on this class, `dataSourceConfiguration` and `dataSource` are identified as candidates.
The AOT engine will convert the configuration class above to code similar to the following:
@@ -199,6 +224,17 @@ There is a bean definition for `dataSourceConfiguration` and one for `dataSource
When a `datasource` instance is required, a `BeanInstanceSupplier` is called.
This supplier invokes the `dataSource()` method on the `dataSourceConfiguration` bean.
[[aot.running]]
== Running with AOT optimizations
AOT is a mandatory step to transform a Spring application to a native executable, so it
is automatically enabled when running in this mode. It is possible to use those optimizations
on the JVM by setting the `spring.aot.enabled` System property to `true`.
NOTE: When AOT optimizations are included, some decisions that have been taken at build-time
are hard-coded in the application setup. For instance, profiles that have been enabled at
build-time are automatically enabled at runtime as well.
[[aot.bestpractices]]
== Best Practices
@@ -207,11 +243,33 @@ However, keep in mind that some optimizations are made at build time based on a
This section lists the best practices that make sure your application is ready for AOT.
[[aot.bestpractices.bean-registration]]
== Programmatic bean registration
The AOT engine takes care of the `@Configuration` model and any callback that might be
invoked as part of processing your configuration. If you need to register additional
beans programmatically, make sure to use a `BeanDefinitionRegistry` to register
bean definitions.
This can typically be done via a `BeanDefinitionRegistryPostProcessor`. Note that, if it
is registered itself as a bean, it will be invoked again at runtime unless you make
sure to implement `BeanFactoryInitializationAotProcessor` as well. A more idiomatic
way is to implement `ImportBeanDefinitionRegistrar` and register it using `@Import` on
one of your configuration classes. This invokes your custom code as part of configuration
class parsing.
If you declare additional beans programmatically using a different callback, they are
likely not going to be handled by the AOT engine, and therefore no hints are going to be
generated for them. Depending on the environment, those beans may not be registered at
all. For instance, classpath scanning does not work in a native image as there is no
notion of a classpath. For cases like this, it is crucial that the scanning happens at
build time.
[[aot.bestpractices.bean-type]]
=== Expose The Most Precise Bean Type
While your application may interact with an interface that a bean implements, it is still very important to declare the most precise type.
The AOT engine performs additional checks on the bean type, such as detecting the presence of `@Autowired` members, or lifecycle callback methods.
The AOT engine performs additional checks on the bean type, such as detecting the presence of `@Autowired` members or lifecycle callback methods.
For `@Configuration` classes, make sure that the return type of the factory `@Bean` method is as precise as possible.
Consider the following example:
@@ -262,10 +320,37 @@ If you are registering bean definitions programmatically, consider using `RootBe
[[aot.bestpractices.constructors]]
=== Avoid Multiple Constructors
The container is able to choose the most appropriate constructor to use based on several candidates.
However, this is not a best practice and flagging the preferred constructor with `@Autowired` if necessary is preferred.
In case you are working on a code base that you can't modify, you can set the {spring-framework-api}/beans/factory/support/AbstractBeanDefinition.html#PREFERRED_CONSTRUCTORS_ATTRIBUTE[`preferredConstructors` attribute] on the related bean definition to indicate which constructor should be used.
In case you are working on a code base that you cannot modify, you can set the {spring-framework-api}/beans/factory/support/AbstractBeanDefinition.html#PREFERRED_CONSTRUCTORS_ATTRIBUTE[`preferredConstructors` attribute] on the related bean definition to indicate which constructor should be used.
[[aot.bestpractices.comlext-data-structure]]
=== Avoid Complex Data Structure for Constructor Parameters and Properties
When crafting a `RootBeanDefinition` programmatically, you are not constrained in terms of types that you can use.
For instance, you may have a custom `record` with several properties that your bean takes as a constructor argument.
While this works fine with the regular runtime, AOT does not know how to generate the code of your custom data structure.
A good rule of thumb is to keep in mind that bean definitions are an abstraction on top of several models.
Rather than using such structure, decomposing to simple types or referring to a bean that is built as such is recommended.
As a last resort, you can implement your own `org.springframework.aot.generate.ValueCodeGenerator$Delegate`.
To use it, register its fully qualified name in `META-INF/spring/aot.factories` using the `Delegate` as the key.
[[aot.bestpractices.custom-arguments]]
=== Avoid Creating Bean with Custom Arguments
Spring AOT detects what needs to be done to create a bean and translates that in generated code using an instance supplier.
The container also supports creating a bean with {spring-framework-api}++/beans/factory/BeanFactory.html#getBean(java.lang.String,java.lang.Object...)++[custom arguments] that leads to several issues with AOT:
. The custom arguments require dynamic introspection of a matching constructor or factory method.
Those arguments cannot be detected by AOT, so the necessary reflection hints will have to be provided manually.
. By-passing the instance supplier means that all other optimizations after creation are skipped as well.
For instance, autowiring on fields and methods will be skipped as they are handled in the instance supplier.
Rather than having prototype-scoped beans created with custom arguments, we recommend a manual factory pattern where a bean is responsible for the creation of the instance.
public class ClientFactoryBean<T extends AbstractClient> implements FactoryBean<T> {
// ...
}
----
======
@@ -380,7 +465,7 @@ Java::
Running an application as a native image requires additional information compared to a regular JVM runtime.
For instance, GraalVM needs to know ahead of time if a component uses reflection.
Similarly, classpath resources are not shipped in a native image unless specified explicitly.
Similarly, classpath resources are not included in a native image unless specified explicitly.
Consequently, if the application needs to load a resource, it must be referenced from the corresponding GraalVM native image configuration file.
The {spring-framework-api}/aot/hint/RuntimeHints.html[`RuntimeHints`] API collects the need for reflection, resource loading, serialization, and JDK proxies at runtime.
If at all possible, `@ImportRuntimeHints` should be used as close as possible to the component that requires the hints.
This way, if the component is not contributed to the `BeanFactory`, the hints won't be contributed either.
It is also possible to register an implementation statically by adding an entry in `META-INF/spring/aot.factories` with a key equal to the fullyqualified name of the `RuntimeHintsRegistrar` interface.
It is also possible to register an implementation statically by adding an entry in `META-INF/spring/aot.factories` with a key equal to the fully-qualified name of the `RuntimeHintsRegistrar` interface.
[[aot.hints.reflective]]
@@ -424,7 +509,7 @@ It is also possible to register an implementation statically by adding an entry
{spring-framework-api}/aot/hint/annotation/Reflective.html[`@Reflective`] provides an idiomatic way to flag the need for reflection on an annotated element.
For instance, `@EventListener` is meta-annotated with `@Reflective` since the underlying implementation invokes the annotated method using reflection.
By default, only Spring beans are considered and an invocation hint is registered for the annotated element.
By default, only Spring beans are considered, and an invocation hint is registered for the annotated element.
This can be tuned by specifying a custom `ReflectiveProcessor` implementation via the
.Are annotations better than XML for configuring Spring?
****
The introduction of annotation-based configuration raised the question of whether this
approach is "`better`" than XML. The short answer is "`it depends.`" The long answer is
that each approach has its pros and cons, and, usually, it is up to the developer to
decide which strategy suits them better. Due to the way they are defined, annotations
provide a lot of context in their declaration, leading to shorter and more concise
configuration. However, XML excels at wiring up components without touching their source
code or recompiling them. Some developers prefer having the wiring close to the source
while others argue that annotated classes are no longer POJOs and, furthermore, that the
configuration becomes decentralized and harder to control.
Spring provides comprehensive support for annotation-based configuration, operating on
metadata in the component class itself by using annotations on the relevant class,
method, or field declaration. As mentioned in
xref:core/beans/factory-extension.adoc#beans-factory-extension-bpp-examples-aabpp[Example: The `AutowiredAnnotationBeanPostProcessor`],
Spring uses `BeanPostProcessors` in conjunction with annotations to make the core IOC
container aware of specific annotations.
No matter the choice, Spring can accommodate both styles and even mix them together.
It is worth pointing out that through its xref:core/beans/java.adoc[JavaConfig] option, Spring lets
annotations be used in a non-invasive way, without touching the target components'
source code and that, in terms of tooling, all configuration styles are supported by
{spring-site-tools}[Spring Tools] for Eclipse, Visual Studio Code, and Theia.
****
An alternative to XML setup is provided by annotation-based configuration, which relies
on bytecode metadata for wiring up components instead of XML declarations. Instead of
using XML to describe a bean wiring, the developer moves the configuration into the
component class itself by using annotations on the relevant class, method, or field
declaration. As mentioned in xref:core/beans/factory-extension.adoc#beans-factory-extension-bpp-examples-aabpp[Example: The `AutowiredAnnotationBeanPostProcessor`], using a
`BeanPostProcessor` in conjunction with annotations is a common means of extending the
Spring IoC container. For example, the xref:core/beans/annotation-config/autowired.adoc[`@Autowired`]
annotation provides the same capabilities as described in xref:core/beans/dependencies/factory-autowire.adoc[Autowiring Collaborators] but
For example, the xref:core/beans/annotation-config/autowired.adoc[`@Autowired`]
annotation provides the same capabilities as described in
xref:core/beans/dependencies/factory-autowire.adoc[Autowiring Collaborators] but
with more fine-grained control and wider applicability. In addition, Spring provides
support for JSR-250 annotations, such as `@PostConstruct` and `@PreDestroy`, as well as
support for JSR-330 (Dependency Injection for Java) annotations contained in the
@@ -36,13 +19,16 @@ can be found in the xref:core/beans/standard-annotations.adoc[relevant section].
[NOTE]
====
Annotation injection is performed before XML injection. Thus, the XML configuration
overrides the annotations for properties wired through both approaches.
Annotation injection is performed before external property injection. Thus, external
configuration (e.g. XML-specified bean properties) effectively overrides the annotations
for properties when wired through mixed approaches.
====
As always, you can register the post-processors as individual bean definitions, but they
can also be implicitly registered by including the following tag in an XML-based Spring
configuration (notice the inclusion of the `context` namespace):
Technically, you can register the post-processors as individual bean definitions, but they
are implicitly registered in an `AnnotationConfigApplicationContext` already.
In an XML-based Spring setup, you may include the following configuration tag to enable
mixing and matching with annotation-based configuration:
val placesOfBirth = parser.parseExpression("members.![placeOfBirth.city]") as List<*>
// evaluates to ["Smiljan", "Idvor"]
val placesOfBirth = parser.parseExpression("members.![placeOfBirth.city]")
.getValue(societyContext) as List<*>
----
======
@@ -32,5 +34,12 @@ evaluated against each entry in the map (represented as a Java `Map.Entry`). The
of a projection across a map is a list that consists of the evaluation of the projection
expression against each map entry.
[NOTE]
====
The Spring Expression Language also supports safe navigation for collection projection.
See
xref:core/expressions/language-ref/operator-safe-navigation.adoc#expressions-operator-safe-navigation-selection-and-projection[Safe Collection Selection and Projection]
val newMap = parser.parseExpression("map.?[value<27]").getValue()
val newMap = parser.parseExpression("#map.?[value < 27]").getValue() as Map
----
======
In addition to returning all the selected elements, you can retrieve only the first or
the last element. To obtain the first element matching the selection, the syntax is
`.^[selectionExpression]`. To obtain the last matching selection, the syntax is
`.$[selectionExpression]`.
the last element. To obtain the first element matching the selection expression, the
syntax is `.^[selectionExpression]`. To obtain the last element matching the selection
expression, the syntax is `.$[selectionExpression]`.
[NOTE]
====
The Spring Expression Language also supports safe navigation for collection selection.
See
xref:core/expressions/language-ref/operator-safe-navigation.adoc#expressions-operator-safe-navigation-selection-and-projection[Safe Collection Selection and Projection]
Used at the class level as above, the annotation indicates a default for all methods of
the declaring class (as well as its subclasses). Alternatively, each method can be
annotated individually. See xref:data-access/transaction/declarative/annotations.adoc#transaction-declarative-annotations-method-visibility[method visibility] for
further details on which methods Spring considers transactional. Note that a class-level
Used at the class level as above, the annotation indicates a default for all methods
of the declaring class (as well as its subclasses). Alternatively, each method can be
@@ -108,7 +108,7 @@ By default, the following `KeyValues` are created:
|===
|Name | Description
|`code.function` _(required)_|Name of Java `Method` that is scheduled for execution.
|`code.namespace` _(required)_|Canonical name of the class of the bean instance that holds the scheduled method.
|`code.namespace` _(required)_|Canonical name of the class of the bean instance that holds the scheduled method, or `"ANONYMOUS"` for anonymous classes.
|`error` _(required)_|Class name of the exception thrown during the execution, or `"none"` if no exception happened.
|`exception` _(deprecated)_|Duplicates the `error` key and might be removed in the future.
|`outcome` _(required)_|Outcome of the method execution. Can be `"SUCCESS"`, `"ERROR"` or `"UNKNOWN"` (if for example the operation was cancelled during execution).
@@ -13,12 +13,12 @@ The Spring Framework provides the following choices for making calls to REST end
== `RestClient`
The `RestClient` is a synchronous HTTP client that offers a modern, fluent API.
It offers an abstraction over HTTP libraries that allows for convenient conversion from Java object to HTTP request, and creation of objects from the HTTP response.
It offers an abstraction over HTTP libraries that allows for convenient conversion from a Java object to an HTTP request, and the creation of objects from an HTTP response.
=== Creating a `RestClient`
The `RestClient` is created using one of the static `create` methods.
You can also use `builder` to get a builder with further options, such as specifying which HTTP library to use (see <<rest-request-factories>>) and which message converters to use (see <<rest-message-conversion>>), setting a default URI, default path variables, a default request headers, or `uriBuilderFactory`, or registering interceptors and initializers.
You can also use `builder()` to get a builder with further options, such as specifying which HTTP library to use (see <<rest-request-factories>>) and which message converters to use (see <<rest-message-conversion>>), setting a default URI, default path variables, default request headers, or `uriBuilderFactory`, or registering interceptors and initializers.
Once created (or built), the `RestClient` can be used safely by multiple threads.
@@ -51,9 +51,9 @@ val defaultClient = RestClient.create()
A function can also be used for more controls, such as specifying xref:web/webmvc/mvc-uri-building.adoc[request parameters].
String URLs are encoded by default, but this can be changed by building a client with a custom `uriBuilderFactory`.
The URL can also be provided with a function or as a `java.net.URI`, both of which are not encoded.
For more details on working with and encoding URIs, see xref:web/webmvc/mvc-uri-building.adoc[URI Links].
==== Request headers and body
If necessary, the HTTP request can be manipulated, by adding request headers with `header(String, String)`, `headers(Consumer<HttpHeaders>`, or with the convenience methods `accept(MediaType...)`, `acceptCharset(Charset...)` and so on.
For HTTP request that can contain a body (`POST`, `PUT`, and `PATCH`), additional methods are available: `contentType(MediaType)`, and `contentLength(long)`.
If necessary, the HTTP request can be manipulated by adding request headers with `header(String, String)`, `headers(Consumer<HttpHeaders>`, or with the convenience methods `accept(MediaType...)`, `acceptCharset(Charset...)` and so on.
For HTTP requests that can contain a body (`POST`, `PUT`, and `PATCH`), additional methods are available: `contentType(MediaType)`, and `contentLength(long)`.
The request body itself can be set by `body(Object)`, which internally uses <<rest-message-conversion>>.
Alternatively, the request body can be set using a `ParameterizedTypeReference`, allowing you to use generics.
Finally, the body can be set to a callback function that writes to an `OutputStream`.
==== Retrieving the response
Once the request has been set up, the HTTP response is accessed by invoking `retrieve()`.
The response body can be accessed by using `body(Class)`, or `body(ParameterizedTypeReference)` for parameterized types like lists.
The `body` method converts the response contents into various types, for instance bytes can be converted into a `String`, JSON into objects using Jackson, and so on (see <<rest-message-conversion>>).
The response body can be accessed by using `body(Class)` or `body(ParameterizedTypeReference)` for parameterized types like lists.
The `body` method converts the response contents into various types– for instance, bytes can be converted into a `String`, JSON can be converted into objects using Jackson, and so on (see <<rest-message-conversion>>).
The response can also be converted into a `ResponseEntity`, giving access to the response headers as well as the body.
This sample shows how `RestClient` can be used to perform a simple GET request.
This sample shows how `RestClient` can be used to perform a simple `GET` request.
`RestClient` can convert JSON to objects, using the Jackson library.
Note the usage of uri variables in this sample, and that the `Accept` header is set to JSON.
Note the usage of URI variables in this sample and that the `Accept` header is set to JSON.
[tabs]
======
@@ -248,8 +275,9 @@ val response = restClient.post() <2>
======
==== Error handling
By default, `RestClient` throws a subclass of `RestClientException` when retrieving a response with a 4xx or 5xx status code.
This behavior can be overriden using `onStatus`.
This behavior can be overridden using `onStatus`.
[tabs]
======
@@ -286,8 +314,9 @@ val result = restClient.get() <1>
======
==== Exchange
For more advanced scenarios, the `RestClient` gives access to the underlying HTTP request and response through the `exchange` method, which can be used instead of `retrieve()`.
Status handlers are not applied when you exchange, because the exchange function already provides access to the full response, allowing you to perform any error handling necessary.
For more advanced scenarios, the `RestClient` gives access to the underlying HTTP request and response through the `exchange()` method, which can be used instead of `retrieve()`.
Status handlers are not applied when use `exchange()`, because the exchange function already provides access to the full response, allowing you to perform any error handling necessary.
[tabs]
======
@@ -336,6 +365,7 @@ val result = restClient.get()
[[rest-message-conversion]]
=== HTTP Message Conversion
[.small]#xref:web/webflux/reactive-spring.adoc#webflux-codecs[See equivalent in the Reactive stack]#
The `spring-web` module contains the `HttpMessageConverter` interface for reading and writing the body of HTTP requests and responses through `InputStream` and `OutputStream`.
@@ -397,7 +427,7 @@ By default, this converter supports `text/xml` and `application/xml`.
|===
By default, `RestClient` and `RestTemplate` register all built-in message converters, depending on the availability of underlying libraries on the classpath.
You can also set the message converters to use explicitly, by using `messageConverters` on the `RestClient` builder, or via the `messageConverters` property of `RestTemplate`.
You can also set the message converters to use explicitly, by using the `messageConverters()` method on the `RestClient` builder, or via the `messageConverters` property of `RestTemplate`.
==== Jackson JSON Views
@@ -437,13 +467,13 @@ parts.add("xmlPart", new HttpEntity<>(myBean, headers));
----
In most cases, you do not have to specify the `Content-Type` for each part.
The content type is determined automatically based on the `HttpMessageConverter` chosen to serialize it or, in the case of a `Resource` based on the file extension.
The content type is determined automatically based on the `HttpMessageConverter` chosen to serialize it or, in the case of a `Resource`, based on the file extension.
If necessary, you can explicitly provide the `MediaType` with an `HttpEntity` wrapper.
Once the `MultiValueMap` is ready, you can use it as the body of a POST request, using `RestClient.post().body(parts)` (or `RestTemplate.postForObject`).
Once the `MultiValueMap` is ready, you can use it as the body of a `POST` request, using `RestClient.post().body(parts)` (or `RestTemplate.postForObject`).
If the `MultiValueMap` contains at least one non-`String` value, the `Content-Type` is set to `multipart/form-data` by the `FormHttpMessageConverter`.
If the `MultiValueMap` has `String` values the `Content-Type` defaults to `application/x-www-form-urlencoded`.
If the `MultiValueMap` has `String` values, the `Content-Type` defaults to `application/x-www-form-urlencoded`.
If necessary the `Content-Type` may also be set explicitly.
[[rest-request-factories]]
@@ -453,17 +483,20 @@ To execute the HTTP request, `RestClient` uses a client HTTP library.
These libraries are adapted via the `ClientRequestFactory` interface.
Various implementations are available:
* `JdkClientHttpRequestFactory` for Java's `HttpClient`,
* `HttpComponentsClientHttpRequestFactory` for use with Apache HTTP Components `HttpClient`,
* `JettyClientHttpRequestFactory` for Jetty's `HttpClient`,
* `ReactorNettyClientRequestFactory` for Reactor Netty's `HttpClient`,
* `SimpleClientHttpRequestFactory` as a simple default.
* `JdkClientHttpRequestFactory` for Java's `HttpClient`
* `HttpComponentsClientHttpRequestFactory` for use with Apache HTTP Components `HttpClient`
* `JettyClientHttpRequestFactory` for Jetty's `HttpClient`
* `ReactorNettyClientRequestFactory` for Reactor Netty's `HttpClient`
* `SimpleClientHttpRequestFactory` as a simple default
If no request factory is specified when the `RestClient` was built, it will use the Apache or Jetty `HttpClient` if they are available on the classpath.
Otherwise, if the `java.net.http` module is loaded, it will use Java's `HttpClient`.
Finally, it will resort to the simple default.
TIP: Note that the `SimpleClientHttpRequestFactory` may raise an exception when accessing the status of a response that represents an error (e.g. 401).
If this is an issue, use any of the alternative request factories.
[[rest-webclient]]
== `WebClient`
@@ -473,12 +506,12 @@ synchronous, asynchronous, and streaming scenarios.
`WebClient` supports the following:
* Non-blocking I/O.
* Reactive Streams back pressure.
* High concurrency with fewer hardware resources.
* Functional-style, fluent API that takes advantage of Java 8 lambdas.
* Synchronous and asynchronous interactions.
* Streaming up to or streaming down from a server.
* Non-blocking I/O
* Reactive Streams back pressure
* High concurrency with fewer hardware resources
* Functional-style, fluent API that takes advantage of Java 8 lambdas
* Synchronous and asynchronous interactions
* Streaming up to or streaming down from a server
See xref:web/webflux-webclient.adoc[WebClient] for more details.
@@ -848,17 +881,17 @@ It can be used to migrate from the latter to the former.
@@ -107,7 +107,7 @@ NOTE: Spring Boot is based on JavaConfig and
{spring-boot-issues}/8115[does not yet provide specific support for functional bean definition],
but you can experimentally use functional bean definitions through Spring Boot's `ApplicationContextInitializer` support.
See {stackoverflow-questions}/45935931/how-to-use-functional-bean-definition-kotlin-dsl-with-spring-boot-and-spring-w/46033685#46033685[this Stack Overflow answer]
for more details and up-to-date information. See also the experimental Kofu DSL developed in {spring-github-org}/spring-fu[Spring Fu incubator].
for more details and up-to-date information. See also the experimental Kofu DSL developed in {spring-github-org}-experimental/spring-fu[Spring Fu incubator].
@@ -14,8 +14,10 @@ Spring Framework provides support for Coroutines on the following scope:
* Suspending function support in Spring MVC and WebFlux annotated `@Controller`
* Extensions for WebFlux {spring-framework-api-kdoc}/spring-webflux/org.springframework.web.reactive.function.client/index.html[client] and {spring-framework-api-kdoc}/spring-webflux/org.springframework.web.reactive.function.server/index.html[server] functional API.
@@ -18,28 +18,9 @@ Kotlin and the Spring Framework:
The following Github projects offer examples that you can learn from and possibly even extend:
* https://github.com/spring-guides/tut-spring-boot-kotlin[tut-spring-boot-kotlin]: Sources of {spring-site}/guides/tutorials/spring-boot-kotlin/[the official Spring + Kotlin tutorial]
* https://github.com/sdeleuze/spring-boot-kotlin-demo[spring-boot-kotlin-demo]: Regular Spring Boot and Spring Data JPA project
* https://github.com/mixitconf/mixit[mixit]: Spring Boot 2, WebFlux, and Reactive Spring Data MongoDB
* https://github.com/mixitconf/mixit[mixit]: Spring Boot, WebFlux, and Reactive Spring Data MongoDB
* https://github.com/sdeleuze/spring-kotlin-functional[spring-kotlin-functional]: Standalone WebFlux and functional bean definition DSL
* https://github.com/sdeleuze/spring-kotlin-fullstack[spring-kotlin-fullstack]: WebFlux Kotlin fullstack example with Kotlin2js for frontend instead of JavaScript or TypeScript
* https://github.com/spring-petclinic/spring-petclinic-kotlin[spring-petclinic-kotlin]: Kotlin version of the Spring PetClinic Sample Application
* https://github.com/sdeleuze/spring-kotlin-deepdive[spring-kotlin-deepdive]: A step-by-step migration guide for Boot 1.0 and Java to Boot 2.0 and Kotlin
* https://github.com/spring-cloud/spring-cloud-gcp/tree/master/spring-cloud-gcp-kotlin-samples/spring-cloud-gcp-kotlin-app-sample[spring-cloud-gcp-kotlin-app-sample]: Spring Boot with Google Cloud Platform Integrations
[[issues]]
== Issues
The following list categorizes the pending issues related to Spring and Kotlin support:
* Spring Framework
** {spring-framework-issues}/20606[Unable to use WebTestClient with mock server in Kotlin]
** {spring-framework-issues}/20496[Support null-safety at generics, varargs and array elements level]
* Kotlin
** {kotlin-issues}/KT-6380[Parent issue for Spring Framework support]
** {kotlin-issues}/KT-5464[Kotlin requires type inference where Java doesn't]
** {kotlin-issues}/KT-20283[Smart cast regression with open classes]
** {kotlin-issues}/KT-14984[Impossible to pass not all SAM argument as function]
** {kotlin-issues}/KT-15125[Support JSR 223 bindings directly via script variables]
** {kotlin-issues}/KT-6653[Kotlin properties do not override Java-style getters and setters]
Some files were not shown because too many files have changed in this diff
Show More
Reference in New Issue
Block a user
Blocking a user prevents them from interacting with repositories, such as opening or commenting on pull requests or issues. Learn more about blocking a user.
Stéphane Nicoll