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JIRA: https://jira.spring.io/browse/INTEXT-131, https://jira.spring.io/browse/INTEXT-134 Add deletion support to OffsetManagers - Separate MetadataStore-related functionality and extract an AbstractOffsetManager to handle resetting/retrieving default offsets from Kafka - Move connection parameters to the Configuration class - Add deletion support to OffsetManagers - Introduce KafkaOffsetManager Renamed to TopicUtils Use an embedded broker for outbound tests. INTEXT-135 Dynamic producing to topics in the KafkaProducingMessageHandler Rework how DefaultConnectionFactory manages cached metadata -Renamed PartitionBrokerMap to a more apt MetadataCache -Removed bidirectional mapping -MetadataCache is still immutable but now allows to create new instances with new TopicMetadata -As a result, DefaultConnectionFactory can load topic data as required, without requiring explicit resets - DefaultConnectionFactory will refresh internally if data about a topic is not available, transparently retrieving data from the server Corrections after PR comments: - use a readLock for getLeaders as well - renamed `refreshLeaders` to `refreshMetadata` - various minor fixes Double lock check Make AbstractOffsetManager Disposable an close on that Corrections, logs, etc. INTEXT-131-134: Polishing * Add `initialOffsets` "free" `AbstractOffsetManager` * Get rid of `connectionFactory` ctor argument for the `KafkaTopicOffsetManager` * `start/stop` checks to the `KafkaMessageDrivenChannelAdapterWithKafkaOffsetManagerTests` * Add note to the `README.md` about `KafkaTopicOffsetManager`
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'
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./gradlew install
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./gradlew api
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./gradlew dist
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File -> Import -> Existing projects into workspace
Browse to the 'spring-integration' root directory. All projects should import free of errors.
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./gradlew idea
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