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* Add `IntegrationPattern` contract to implement on the target components which represent particular EIP * Add `IntegrationPatternType` with an internal `IntegrationPatternCategory` to return from the component implementing `IntegrationPattern` * Parse `IntegrationPatternType` in the `IntegrationNode` for potential use on the UI for drawing a particular icon * More pattern representations * Clean up Checkstyle * Fix JavaDocs * Add `integrationPatternCategory` assertion into the `IntegrationGraphServerTests` * Add more IntegrationPattern implementations * Provide some delegation and overriding logic whenever we have components wrapping * Fix unused imports * Add `inbound_gateway` pattern indicator * Add conditional on `expectReply` to indicate a component as an `IntegrationPatternType.outbound_channel_adapter` or `IntegrationPatternType.outbound_gateway` * Make some code clean up in affected classes * Add a `gateway` type for `@MessagingGateway` * Comment the reason for `outbound_gateway` type in the `AbstractReplyProducingMessageHandler` * Bump `IntegrationGraphServer.GRAPH_VERSION` * Add new attributes into graph sample in the `graph.adoc` * Document an `IntegrationPattern` * Apply changes for version 5.3 * Rebased into `5.3-WIP` * Add a `whats-new.adoc` note about an `IntegrationPattern`
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: https://projects.spring.io/spring-integration