JIRA: https://jira.spring.io/browse/INT-3728 The `CachingClientConnectionFactory` uses a temporary (rejecting) listener until the connection is established and then replaces the listener in the connection. There is a race condition in that if the server starts sending messages before the listener is replaced, the message is rejected. Add a mechanism to delay `onMessage` calls until the real listener has been registered. Also fix `onMessage` in the cached connection so an `ErrorMessage` is propagated correctly. To reproduce: revert src/main; add `Thread.sleep(1000)` before `registerListener(tcpListener);` in `CachedConnection` ctor and run the new test. To introduce a similar timing hole with the new code, add the sleep before `this.theConnection.registerListener(this);` in `TcpConnectionInterceptorSupport`. Summary of changes: `CachingClientConnectionFactory` - register the underlying connection's listener in the ctor, utilizing the `TcpConnectionInterceptorSupport.registerListener()` method. - fix `ErrorMessage` propagation. `AbstractClientConnectionFactory` - propagate the `enableManualListenerRegistration` to connections. `TcpConnectionSuport` - implement delay when manual listener registration is enabled. Add test case. Fix Failover Tests `FailoverClientConnectionFactory` - propagate enable manual listener registration to underlying factories Polishing
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
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
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./gradlew api
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./gradlew reference
To build complete distribution including -dist, -docs, and -schema zip files (results will be in build/distributions)
./gradlew dist
Using Eclipse
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./gradlew eclipse
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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