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* GH-212: Add ConsumerSeekAware impl to Inbounds Fixes spring-projects/spring-integration-kafka#212 **Cherry-pick to 3.0.x** * GH-212: Add ConsumerSeekAware impl to Inbounds Fixes spring-projects/spring-integration-kafka#212 * Introduce a new `IntegrationKafkaHeaders.CONSUMER_SEEK_CALLBACK` header to be populated to messages for sending to the channel * Populate that header from the `KafkaInboundGateway` and `KafkaMessageDrivenChannelAdapter` into the message from the `seekCallBack` property if `ListenerContainer` is single-threaded or from the `ThreadLocal<ConsumerSeekAware.ConsumerSeekCallback>` otherwise; and only if newly introduced `setAdditionalHeaders` is `true` * Populate `seekCallBack` property or `ThreadLocal<?>` from the `registerSeekCallback()` implementation from the internal listeners * Add `setOnPartitionsAssignedSeekCallback(BiConsumer)` and `setOnIdleSeekCallback(BiConsumer)` options to react for the appropriate event from the underlying container and perform appropriate seek management * Add new options to the DSL classes and cover them with tests, including check for new `IntegrationKafkaHeaders.CONSUMER_SEEK_CALLBACK` header **Cherry-pick to 3.0.x** * Address PR comments: remove unnecessary API * *Polishing `setOnPartitionsAssignedSeekCallback()` JavaDocs *Close producers in the `KafkaProducerMessageHandlerTests`
Spring Integration 
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Checking out and Building
To check out the project and build from the 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 an 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
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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.
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To generate IDEA metadata (.iml and .ipr files), do the following:
./gradlew idea
Resources
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