From a programming model perspective, @RequestMapping methods now
support two new return value types:
* java.util.concurrent.Callable - used by Spring MVC to obtain the
return value asynchronously in a separate thread managed transparently
by Spring MVC on behalf of the application.
* org.springframework.web.context.request.async.DeferredResult - used
by the application to produce the return value asynchronously in a
separate thread of its own choosing.
The high-level idea is that whatever value a controller normally
returns, it can now provide it asynchronously, through a Callable or
through a DeferredResult, with all remaining processing --
@ResponseBody, view resolution, etc, working just the same but
completed outside the main request thread.
From an SPI perspective, there are several new types:
* AsyncExecutionChain - the central class for managing async request
processing through a sequence of Callable instances each representing
work required to complete request processing asynchronously.
* AsyncWebRequest - provides methods for starting, completing, and
configuring async request processing.
* StandardServletAsyncWebRequest - Servlet 3 based implementation.
* AsyncExecutionChainRunnable - the Runnable used for async request
execution.
All spring-web and spring-webmvc Filter implementations have been
updated to participate in async request execution.
The open-session-in-view Filter and interceptors implementations in
spring-orm will be updated in a separate pull request.
Issue: SPR-8517
- Spring remains compatible against AJ version 1.6.8, but is now
compiling and testing against 1.6.12
- Encountered what appears to be an AJ bug introduced in 1.6.10: an
assertion in org.aspectj.weaver.UnresolvedType causes a false
negative failure when encountering org.springframework.io.Resource
arrays, e.g. "[org.springframework.io.Resource@xxx". This problem
has been reported to the AJ team and in the meantime, the recommended
workaround is to disable assertions either completely, or at least
selectively with
-disableassertions:org.aspectj.weaver.UnresolvedType
Issue: SPR-7989, SPR-9272
The new @MVC support classes select a HandlerMethodArgumentResolver
and a HandlerMethodReturnValueHandler statically, i.e. based on
the signature of the method, which means that a controller method
can't declare a more general return type like Object but actually
return a more specific one, e.g. String vs RedirectView, and
expect the right handler to be used.
The fix ensures that a HandlerMethodReturnValueHandler is selected
based on the actual return value type, which is something that was
supported with the old @MVC support classes. One consequence
of the change is the selected HandlerMethodReturnValueHandler can
no longer be cached but that matches the behavior of the old
@MVC support classes.
Issues: SPR-9218
Invalid Content-Type or Accept header values previously resulted in the
IllegalArgumentException getting propagated. After this change such
errors are detected and generally treated as a "no match", which
may for example result in a 406 in the case of the Accept header.
Issue: SPR-9148
Before this change bean scopes chapter in Spring reference documentation
had a note which mentioned that creating a scoped proxy for singleton-
or prototype-scoped beans will throw BeanCreationException.
This is no longer the case and this change removes the mentioned note.
Issue: SPR-7940
Each spring-* subproject now has sourcesJar and javadocJar tasks
- Ignore subproject overview.html files for now (not all have one)
- Ensure @author attribution occurs
- Javadoc 'header' is project description
spring-asm is a special case
- source jar is created, but empty (to comply with entry rules for
Maven Central)
- add package-info.java explaining the nature of spring-asm
this is nice, because it shows up in the public API docs now.
- add SpringAsmInfo in the org.springframework.asm package as a
placeholder allowing the generation of javadocs (see link to bug)
- add explicit 'repackageAsm' Gradle task allowing for easy testing
and merging of jar containing bundlor manifest as well as jar
containing repackaged ASM classes.
- Add 'api' gradle task to generate project-wide API Javadoc
results in <root>/build/api
- Add docsZip task including api and reference documentation
suitable for publication to
http://static.springframework.org/docs/spring-framework
- Add schemaZip task including all spring-* XSD files
suitable for publication to http://static.springframework.org/schema
- Add distZip task to include all libs, docs and schema
- filter src/dist/*.txt for ${copyright} and ${version}
- copy legal (notice, license) dynamically into individual jar files
- copy legal and readme files into root of distribution zip
- Refactor location of 'wrapper' task
Each of the zip tasks (docsZip, schemaZip, distZip) have been added to
the 'archives' configuration, meaning that (a) they will be built
automatically with `gradle build` and (b) will be published
automatically to artifactory when using the Artifactory Gradle plugin
and/or Artifactory Bamboo integration.
Prior to this change, license.txt and notice.txt files were duplicated
across every subproject in their respective src/main/resources/META-INF
directories.
This commit centralizes these files under the root project at src/dist,
along with the changelog and readme files. The definition of the 'jar'
task has been been extended to include the license and notice files in
module jars as they are created.
The directory is named src/dist because these files are all related to
distribution - the readme is different than the one you see at the root
of the source tree - the intended audience is for users who download
the spring-framework distribution zip. A task to create that
distribution zip will be added in subsequent commits.
Problems
- Eliminate — in favor of —
— was causing 'no such entity' errors during docbook
processing; — produces the equivalent output.
- Fix column issues in appendices
column counts were set to 3, when they are in fact 4. This passed
under DocBook 4 and Spring Build for unknown reasons, but caused a
hard stop under DocBook 5 and the docbook-reference-plugin.
- Add jdbc callout section in docbook 5-friendly style
use <co/> tags as advertised in DocBook documentation.
- Set correct widths for PDF ref doc images
images were rendering larger than the PDF page; just set all to
width=400 and everything looks good.
Polish
- Update reference doc copyright to 2012
- Remove "work-in-progress" language from ref docs
- Update maven URLs to repo.springsource.org
- Update javadoc urls from 3.0.x/javadoc-api => current/api
- Replace hardcoded "3.1" with ${version} in ref doc
It was determined (through painful trial and error) that after the
upgrade to DocBook 5 and the gradle-docbook-reference plugin, that
<emphasis> elements embedded within <programlisting> elements causes
NullPointerExceptions during processing.
This change eliminates these <emphasis> elements to work around the
problem. This means a slight degradation in presentation for the
affected areas of the reference documentation. After some research,
it is not clear what other workarounds may be possible that leave
the text actually emphasized.
This change eliminates the spring-framework-reference subproject, moving
these sources into the root project's own src directory.
This makes sense because the reference docs span all submodules, and
also because api Javadoc is created at the root project level as well.
This means that both api and reference documentation output will now
reside in the root project's 'build' directory. This is more consistent
and easy to discover.
This commit eliminates the 'integration-tests' subproject in favor of
managing these sources under the root project's own 'src' directory.
This helps to avoid special-case handling for integration-tests in the
Gradle build, e.g. avoiding publication of jars to Artifactory /
Maven Central.
It is also semantically more correct. This is not a Spring Framework
subproject so much as it is a collection of integration tests that
span functionality across many subprojects. In this way, it makes
sense to place them directly under the root project.
Issue: SPR-8116
Branch in question is 'env' branch from git://git.springsource.org/sandbox/cbeams.git; merged into
git-svn repository with:
git merge -s recursive -Xtheirs --no-commit env
No merge conflicts, but did need to
git rm spring-build
prior to committing.
With this change, Spring 3.1.0 development is now happening on SVN
trunk. Further commits to the 3.0.x line will happen in an as-yet
uncreated SVN branch. 3.1.0 snapshots will be available
per the usual nightly CI build from trunk.
Rossen Stoyanchev
Chris Beams
Stevo Slavic
Phani Kandula