spring-projects/spring-integration — pull request #1172 by artembilan (2014-06-15 11:41:09+00:00)
Title: INT-3442 `RedisQMDE` delay `stop` until last read

JIRA: https://jira.spring.io/browse/INT-3442

Previously `RedisQueueMessageDrivenEndpoint.stop()` returned immediately.
It caused an issue when one more `message` might be read and processed to stopped app.

* Introduce `AbstractEndpoint#lifecycleCondition` and wait on it from `RedisQueueMessageDrivenEndpoint.doStop()`
and `signal()` it from `ListenerTask`.
* Since everything is done around `lifecycleLock` the `RedisQueueMessageDrivenEndpoint.stop()` waits for the proper
'last' message process.
* Add tiny `Thread.sleep(1)` to the `popMessageAndSend` cycle to free `lifecycleLock` for other Threads, e.g. `stop()`

**Cherry-pick to 4.0.x**