After this change each call stack level pushes and pops an async
Callable to ensure the AsyncExecutionChain is in sync with the
call stack. Before this change, a controller returning a "forward:"
prefixed string caused the AsyncExecutionChain to contain a
extra Callables that did not match the actual call stack.
Issue: SPR-9611
Update section on exception handling in Spring MVC chapter to include
more guidance on exception handling when implementing a REST API.
Issue: SPR-9290
Previously DefaultHandlerExceptionResolver did not handle BindException
but after this change it does. A BindException is raised when an
@ModelAttribute annotated argument is not followed by a BindingResult
argument. Hence this is unlikely to affect browser rendering.
For programmatic clients however this change ensures an unhandled
BindException is at least turned into a 400 error.
Issue: SPR-9310
The Atom/RSS message converters are now registered ahead of the
Jackson and the JAXB2 message converters by default. Since the Atom
and RSS converters convert to and from very specific object types
Feed and Channel respectively, that shouldn't introduce any regressions
and will work more intuitively when the requested media type is "*/*".
Issue: SPR-9054
Before this change @ExceptionHandler methods could be located in and
apply locally within a controller. The change makes it possible to have
such methods applicable globally regardless of the controller that
raised the exception.
The easiest way to do that is to add them to a class annotated with
`@ExceptionResolver`, a new annotation that is also an `@Component`
annotation (and therefore works with component scanning). It is also
possible to register classes containing `@ExceptionHandler` methods
directly with the ExceptionHandlerExceptionResolver.
When multiple `@ExceptionResolver` classes are detected, or registered
directly, the order in which they're used depends on the the `@Order`
annotation (if present) or on the value of the order field (if the
Ordered interface is implemented).
Issue: SPR-9112
Before this change the StringHttpMessageConverter used a fixed charset
"ISO-8859-1" if the requested content type did not specify one. This
change adds a defaultCharset field and a constructor to configure it in
StringHttpMessageConverter.
Issue: SPR-9487
Following the introduction of ContentNegotiationManager that allows,
among other things, to configure the file extensions to use for content
negotiation, this change adds "smart" suffix pattern match that matches
against the configured file extensions only rather than against any
extension.
Given the request mapping "/jobs/{jobName}" and one configured file
extension ("json"), a request for "/jobs/my.job" will select the
pattern "/jobs/{jobName}" while a request for "/jobs/my.job.json" will
select the pattern "/jobs/{jobName}.json". Previously, both requests
would have resulted in the pattern "/jobs/{jobName}.*".
Issue: SPR-7632, SPR-8474
The HTTP PATCH method is now supported whereever HTTP methods are used.
Annotated controllers can be mapped to RequestMethod.PATCH.
On the client side the RestTemplate execute(..) and exchange(..)
methods can be used with HttpMethod.PATCH. In terms of HTTP client
libraries, Apache HttpComponents HttpClient version 4.2 or later is
required (see HTTPCLIENT-1191). The JDK HttpURLConnection does not
support the HTTP PATCH method.
Issue: SPR-7985
Introduced ContentNeogtiationStrategy for resolving the requested
media types from an incoming request. The available implementations
are based on path extension, request parameter, 'Accept' header,
and a fixed default content type. The logic for these implementations
is based on equivalent options, previously available only in the
ContentNegotiatingViewResolver.
Also in this commit is ContentNegotiationManager, the central class to
use when configuring content negotiation options. It accepts one or
more ContentNeogtiationStrategy instances and delegates to them.
The ContentNeogiationManager can now be used to configure the
following classes:
- RequestMappingHandlerMappingm
- RequestMappingHandlerAdapter
- ExceptionHandlerExceptionResolver
- ContentNegotiatingViewResolver
Issue: SPR-8410, SPR-8417, SPR-8418,SPR-8416, SPR-8419,SPR-7722
The reference manual currently documents the wrong file name for the
default data SQL script used by EmbeddedDatabaseBuilder. In addition,
the testing chapter of the reference manual does not link to the testing
section of the JDBC chapter.
- Updated the "Testing data access logic with an embedded database"
section of the reference manual appropriately.
- Added a new paragraph to the "JDBC Testing Support" section of the
testing chapter which cross references the "Testing data access logic
with an embedded database" section.
Issue: SPR-9467
The BeanFactory makes it easier to configure a customized Jackson
ObjectMapper (for example enable/disable certain features).
This bean factory is usually used with
MappingJacksonHttpMessageConverter or MappingJacksonJsonView.
See JavaDoc for examples.
Issue: SPR-9125
HttpStatus cannot be created with an unknown status code. If a server
returns a status code that's not in the HttpStatus enum values, an
IllegalArgumentException is raised. Rather than allowing it to
propagate as such, this change ensures the actual exception raised is
a RestClientException.
Issue: SPR-9406
The junit:junit Maven artifact includes a bundled version of hamcrest
core. For projects that depend on later versions of hamcrest this causes
significant issues in terms of dependency management.
The spring-test module now depends on junit:junit-dep, thus allowing
developers to better manage their test dependencies on a more fine
grained level.
Also tidied up dependency issues regarding hamcrest-core and
hamcrest-all across the build.
Issue: SPR-6966
In Spring 3.1 the spring-test Maven artifact did not have a required
dependency on spring-core, but there is practically no part of
spring-test that can be used without spring-core. Most test utilities
that are intended to be stand-alone utilities in fact use utility
classes from spring-core (e.g., ReflectionTestUtils). Even some of the
web mocks/stubs use spring-core (e.g., DelegatingServletInputStream).
In addition, the current Gradle build configuration for the spring-test
module is very simplistic -- in that it does not explicitly list any
optional dependencies such as the Servlet and Portlet APIs -- and it
defines a 'compile' dependency on spring-webmvc-portlet.
The resulting Maven dependencies in the generated POM are therefore not
what a typical consumer of the spring-test artifact would reasonably
expect.
To address these issues, the Gradle build configuration for the
spring-test module now explicitly defines the following 'compile'
dependencies:
- spring-core
- spring-webmvc, optional
- spring-webmvc-portlet, optional
- junit, optional
- testng, optional
- servlet-api, optional
- jsp-api, optional
- portlet-api, optional
- activation, provided
The only required dependency is now spring-core; all other dependencies
are 'optional'.
Issue: SPR-8861
Changes introduced in Spring 3.1 for Environment support inadvertently
established a cyclic dependency between the
org.springframework.web.context and
org.springframework.web.context.support packages, specifically through
web.context.ContextLoader's invocation of
web.context.support.WebApplicationContextUtils#initServletPropertySources.
This commit introduces ConfigurableWebEnvironment to break this cyclic
dependency. All web.context.ConfigurableWebApplicationContext types now
return web.context.ConfigurableWebEnvironment from their #getEnvironment
methods; web.context.support.StandardServletEnvironment now implements
ConfigurableWebEnvironment and makes the call to
web.context.support.WebApplicationContextUtils#initServletPropertySources
within its implementation of #initPropertySources. This means that
web.context.ContextLoader now invokes
web.context.ConfigurableWebEnvironment#initPropertySources instead of
web.context.support.WebApplicationContextUtils#initServletPropertySources
and thus the cycle is broken.
Issue: SPR-9439
java.util.concurrent's ScheduledExecutorService and its #schedule*
methods allow for an 'initialDelay' parameter in milliseconds.
Similarly, Spring's TaskExecutor abstraction allows for a concrete
'startTime' expressed as a Date. However, Spring's <task:scheduled> XML
element and @Scheduled annotation have, to date, not allowed for an
initial delay parameter that can be propagated down to the underlying
TaskScheduler/ScheduledExecutorService.
This commit introduces initial-delay and #initialDelay attributes to
task:scheduled and @Scheduled respectively, both indicating the number
of milliseconds to wait before the first invocation of the method in
question. Specifying a delay in this fashion is only valid in
conjunction with fixed-rate and fixed-delay tasks (i.e. not with cron
or trigger tasks).
The principal changes required to support these new attributes lie in
ScheduledTaskRegistrar, which previously supported registration of
tasks in the form of a Runnable and a Long parameter indicating (in the
case of fixed-rate and fixed-delay tasks), the interval with which the
task should be executed. In order to accommodate a third (and optional)
'initialDelay' parameter, the IntervalTask class has been added as a
holder for the Runnable to be executed, the interval in which to run
it, and the optional initial delay. For symmetry, a TriggerTask and
CronTask have also been added, the latter subclassing the former. And a
'Task' class has been added as a common ancestor for all the above.
One oddity of the implementation is in the naming of the new
setters in ScheduledTaskRegistrar. Prior to this commit, the setters
were named #setFixedDelayTasks, #setFixedRateTasks, etc, each accepting
a Map<Runnable, long>. In adding new setters for each task type, each
accepting a List<IntervalTask>, List<CronTask> etc, naturally the
approach would be to use method overloading and to introduce methods
of the same name but with differing parameter types. Unfortunately
however, Spring does not support injection against overloaded methods
(due to fundamental limitations of the underlying JDK Introspector).
This is not a problem when working with the ScheduledTaskRegistrar
directly, e.g. from within a @Configuration class that implements
SchedulingConfigurer, but is a problem from the point of view of the
ScheduledTasksBeanDefinitionParser which parses the <task:scheduled>
element - here the ScheduledTaskRegistrar is treated as a Spring bean
and is thus subject to these limitations. The solution to this problem
was simply to avoid overloading altogether, thus the naming of the new
methods ending in "List", e.g. #setFixedDelayTasksList, etc. These
methods exist primarily for use by the BeanDefinitionParser and are
not really intended for use by application developers. The Javadoc for
each of the new methods makes note of this.
Issue: SPR-7022
In anticipation of substantive changes required to implement "initial
delay" support in the <task:scheduled> element and @Scheduled
annotation, the following updates have been made to the components and
infrastructure supporting scheduled task execution:
- Fix code style violations
- Fix compiler warnings
- Add Javadoc where missing, update to use {@code} tags, etc.
- Organize imports to follow conventions
This commit introduces three abstract WebApplicationInitializers, to be
used in the typical setup of a Spring-based web application.
- AbstractContextLoaderInitializer provides an abstract base class for
registering a ContextLoaderListener.
- AbstractDispatcherServletInitializer provides an abstract base class
for registering a DispatcherServlet, with an optional root context.
- AbstractAnnotationConfigDispatcherServletInitializer provides an
abstract base class for registering a DispatcherServlet and optional
ContextLoaderListener based on annotated (e.g. @Configuration)
classes.
Issue: SPR-9300
Prior to this change, Spring's @Async annotation support was tied to a
single AsyncTaskExecutor bean, meaning that all methods marked with
@Async were forced to use the same executor. This is an undesirable
limitation, given that certain methods may have different priorities,
etc. This leads to the need to (optionally) qualify which executor
should handle each method.
This is similar to the way that Spring's @Transactional annotation was
originally tied to a single PlatformTransactionManager, but in Spring
3.0 was enhanced to allow for a qualifier via the #value attribute, e.g.
@Transactional("ptm1")
public void m() { ... }
where "ptm1" is either the name of a PlatformTransactionManager bean or
a qualifier value associated with a PlatformTransactionManager bean,
e.g. via the <qualifier> element in XML or the @Qualifier annotation.
This commit introduces the same approach to @Async and its relationship
to underlying executor beans. As always, the following syntax remains
supported
@Async
public void m() { ... }
indicating that calls to #m will be delegated to the "default" executor,
i.e. the executor provided to
<task:annotation-driven executor="..."/>
or the executor specified when authoring a @Configuration class that
implements AsyncConfigurer and its #getAsyncExecutor method.
However, it now also possible to qualify which executor should be used
on a method-by-method basis, e.g.
@Async("e1")
public void m() { ... }
indicating that calls to #m will be delegated to the executor bean
named or otherwise qualified as "e1". Unlike the default executor
which is specified up front at configuration time as described above,
the "e1" executor bean is looked up within the container on the first
execution of #m and then cached in association with that method for the
lifetime of the container.
Class-level use of Async#value behaves as expected, indicating that all
methods within the annotated class should be executed with the named
executor. In the case of both method- and class-level annotations, any
method-level #value overrides any class level #value.
This commit introduces the following major changes:
- Add @Async#value attribute for executor qualification
- Introduce AsyncExecutionAspectSupport as a common base class for
both MethodInterceptor- and AspectJ-based async aspects. This base
class provides common structure for specifying the default executor
(#setExecutor) as well as logic for determining (and caching) which
executor should execute a given method (#determineAsyncExecutor) and
an abstract method to allow subclasses to provide specific strategies
for executor qualification (#getExecutorQualifier).
- Introduce AnnotationAsyncExecutionInterceptor as a specialization of
the existing AsyncExecutionInterceptor to allow for introspection of
the @Async annotation and its #value attribute for a given method.
Note that this new subclass was necessary for packaging reasons -
the original AsyncExecutionInterceptor lives in
org.springframework.aop and therefore does not have visibility to
the @Async annotation in org.springframework.scheduling.annotation.
This new subclass replaces usage of AsyncExecutionInterceptor
throughout the framework, though the latter remains usable and
undeprecated for compatibility with any existing third-party
extensions.
- Add documentation to spring-task-3.2.xsd and reference manual
explaining @Async executor qualification
- Add tests covering all new functionality
Note that the public API of all affected components remains backward-
compatible.
Issue: SPR-6847
The reference manual previously did not mention the applicability of
JSR-250 lifecycle annotations within the TestContext framework. The
lacking documentation here has lead to misunderstandings of the support
provided for @PostConstruct and @PreDestroy in test classes.
The testing chapter of the reference manual has therefore been updated
to explicitly define the limited support for these annotations.
Also introduced Jsr250LifecycleTests for empirical verification of the
expected behavior.
Issue: SPR-4868
Updated the testing chapter of the reference manual to refer to
'annotated classes' instead of 'configuration classes' where
appropriate.
Also revised the content and examples in the @ContextConfiguration
annotation section, mentioned Gradle, and reformatted the entire text.
Issue: SPR-9401
When URL decoding is turned off in AbstractHandlerMapping, the
extracted path variables are also not encoded. Turning off URL decoding
may be necessary for request mapping to work correctly when the path
may contain the (encoded) special character '/'. At the same time there
is no good reason not to leave path variables encoded. This change
ensures path variables are encoded when URL decoding is turned off.
Issue: SPR-9098
MappingJackson2JsonView and MappingJacksonJsonView now provide an
option that will set the Content-Length header of JSON responses.
Use of the option implies buffering of the response and it must be
enabled explicitly.
Issue: SPR-7866
This change makes it possible to provide a custom MessageCodesResolver
through the MVC Java config whether using @EnableWebMvc and extending
WebMVcConfigurerAdapter or sub-classing directly from
WebMvcConfigurationSupport.
Issue: SPR-9223
The new property can be used to ignore specific exceptions that may
otherwise be matched by the "exceptionMappings" property or resolved
through the defaultErrorView.
Issue: SPR-5193
When @ResponseStatus has a reason and servletResponse.sendError() is
called, the response is committed and should no longer be written to.
After this change, the ServletInvocableHandlerMethod will mark the
response fully handled and will ignore any non-null return values.
Issue: SPR-9159
Before this fix the q-value of media types in the Accept header were
ignored when using the new RequestMappingHandlerAdapter in combination
with @ResponseBody and HttpMessageConverters.
Issue: SPR-9160
The MappingJacksonHttpMessageConverter now catches all IOException
types raised while reading JSON and translates them into
HttpMessageNotReadableException.
Issue: SPR-9238
Previously RequestMappingHandlerMapping detected @RequestMapping
methods through an initApplicationContext() hook. However, the
HandlerMapping may not have been fully set up with all its
dependencies at that point including settings like useSuffixPattern
and others.
This change moves the detection @RequestMapping methods to an
InitializingBean.afterPropertiesSet() hook.
Issue: SPR-9371
The ErrorsMethodArgumentResolver expects the preceding @ModelAttribute
in the controller method signature to be the last one added in the
model -- an assumption that can break if a model attribute is added
earlier (e.g. through a @ModelAttribute method) and more attributes
are added as well. This fix ensures when an @ModelAttribute is resolved
as a controller method argument it has the highest index in the model.
Issue: SPR-9378
Rossen Stoyanchev
Sam Brannen
Juergen Hoeller
Chris Beams
Dmitry Katsubo
Arjen Poutsma
Oliver Gierke
Chin Huang