public void shutdown() {
			final boolean shutdown;

			synchronized (AgentControllerServerListener.this) {
				shutdown = (m_messagesReceived & SHUTDOWN) == 0;
			}

			if (shutdown) {
				m_logger.info("agent controller communication is shutdown");
				setReceived(SHUTDOWN);
			}
		}
Return the last {@link StartGrinderMessage} received.

@return The message.
ngrinder-core/src/main/java/net/grinder/engine/communication/AgentControllerServerListener.java