Producer Flow Control：activemq 生產者控制

If you are sending a persistent message (so that a response of the OpenWire Message is expected then the broker will send the producer a ProducerAck message. This informs the producer that the previous sending window has been processed, so that it can now send another window. Its kinda like consumer acks but in reverse.

若是配置 messageack 機制就是persistent 方式存儲數據。

http://activemq.apache.org/producer-flow-control.html