286c421c1a
JIRA: https://jira.spring.io/browse/INT-3387, https://jira.spring.io/browse/INT-3806 * Introduce ``` MessageGroupStore void addMessagesToGroup(Object groupId, Message<?>... messages); ``` And implement it in all stores. * Use new `addMessagesToGroup` where it is reasonable, e.g. `DelayHandler` * Optimize test-case to use a new store method (where it is possible) * Fix timing delays in the `JdbcMessageStoreTests` * Introduce `PersistentMessageGroup` * Add `AbstractMessageGroupStore#proxyMessageGroupForLazyLoad` to wrap the raw `MessageGroup` to the `PersistentMessageGroup` for lazy-load * Rework `MessageGroupMetadata` do not be `immutable` and allow to store/restore in the `AbstractKeyValueMessageStore` only the `MessageGroupMetadata` * Refactor `ResequencingMessageHandler` and `SequenceSizeReleaseStrategy` a bit for better performance when interact with the `MessageGroup` * Add `AbstractMessageGroupStore#setLazyLoadMessageGroups` to switch off the `lazy-load` behavior and restore the previous full `MessageGroup` logic * Add `What's New` note and `message-store.adoc` paragraph for the lazy-load functionality `GroupType.PERSISTENT` and not lazy by default PR Comments Fix `JdbcMessageStoreTests` timing issues Address PR comments * Add performance test to the `ConfigurableMongoDbMessageGroupStoreTests` * Add JavaDocs for the `MessageGroupFactory` methods * Add `log4j.properties` into the `test` MongoDB module for better traceability * Fix `JdbcMessageStore#getOneMessageFromGroup()` over the `doPollForMessage()` delegation. The `jdbcTemplate.queryForObject()` requires exactly one and only one raw in `resultSet` * Add performance test results into the `message-store.adoc`
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