df9593a528
JIRA: https://jira.spring.io/browse/INT-4244 The `JpaOutboundGateway` returns a whole `Message` for reply copying request headers. Building the reply a `AbstractMessageProducingHandler` uses `MessageBuilder` to create a new `Message` with all request headers because of `shouldCopyRequestHeaders() == true` * To avoid some overhead with new `Message` and `MessageBuilder` for nothing, just return a JPA result as is and let super class to build the Message * Optimize all reply producers to return `MessageBuilder` to the super `handleMessage()` process * Return the whole `gatherResult` `Message<?>` from the `ScatterGatherHandler` to have ability to transfer reply headers as well * Mark `DelayHandler` as `shouldCopyRequestHeaders() return false` since it doesn't modify Message and returns it as is after delay
Spring Integration 
Checking out and Building
To check out the project and build from source, do the following:
git clone git://github.com/spring-projects/spring-integration.git
cd spring-integration
./gradlew build
NOTE: While Spring Integration runs with Java SE 6 or higher, a Java 8 compiler is required to build the project.
If you encounter out of memory errors during the build, increase available heap and permgen for Gradle:
GRADLE_OPTS='-XX:MaxPermSize=1024m -Xmx1024m'
To build and install jars into your local Maven cache:
./gradlew install
To build api Javadoc (results will be in build/api):
./gradlew api
To build reference documentation (results will be in build/reference):
./gradlew reference
To build complete distribution including -dist, -docs, and -schema zip files (results will be in build/distributions)
./gradlew dist
Using Eclipse
To generate Eclipse metadata (.classpath and .project files), do the following:
./gradlew eclipse
Once complete, you may then import the projects into Eclipse as usual:
File -> Import -> Existing projects into workspace
Browse to the 'spring-integration' root directory. All projects should import free of errors.
Using IntelliJ IDEA
To generate IDEA metadata (.iml and .ipr files), do the following:
./gradlew idea
Resources
For more information, please visit the Spring Integration website at: http://projects.spring.io/spring-integration