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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 Framework
The Spring Framework provides a comprehensive programming and configuration model for modern Java-based enterprise applications - on any kind of deployment platform. A key element of Spring is infrastructural support at the application level: Spring focuses on the "plumbing" of enterprise applications so that teams can focus on application-level business logic, without unnecessary ties to specific deployment environments.
The framework also serves as the foundation for Spring Integration, Spring Batch and the rest of the Spring family of projects. Browse the repositories under the SpringSource organization on GitHub for a full list.
.NET and Python variants are available as well.
Downloading artifacts
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Documentation
See the current Javadoc and Reference docs.
Getting support
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Issue Tracking
Spring's JIRA issue tracker can be found here. Think you've found a bug? Please consider submitting a reproduction project via the spring-framework-issues repository. The readme provides simple step-by-step instructions.
Building from source
The Spring Framework uses a Gradle-based build system. In the instructions
below, ./gradlew is invoked from the root of the source tree and
serves as a cross-platform, self-contained bootstrap mechanism for the build. The only
prerequisites are git and JDK 1.6+.
check out sources
git clone git://github.com/SpringSource/spring-framework.git
compile and test, build all jars, distribution zips and docs
./gradlew build
install all spring-* jars into your local Maven cache
./gradlew install
import sources into your IDE
Run ./import-into-eclipse.sh or read import-into-idea.md as appropriate.
... and discover more commands with ./gradlew tasks. See also the
Gradle build and release FAQ.
Contributing
Pull requests are welcome; see the contributor guidelines.
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License
The Spring Framework is released under version 2.0 of the Apache License.