@Override
	public final void stop(Runnable callback) {
		this.lifecycleLock.lock();
		try {
			this.stop();
			callback.run();
		}
		finally {
			this.lifecycleLock.unlock();
		}
	}
Base implementation of Spring Integration {@code MessageHandler} handling {@code Message}.

@author Janne Valkealahti
extensions/spring-xd-extension-gpfdist/src/main/java/org/springframework/xd/greenplum/gpfdist/AbstractGPFDistMessageHandler.java