xiangwangcheng commented on issue #1673: Why there is a pullMessageService in Producer ? URL: https://github.com/apache/rocketmq/issues/1673#issuecomment-568774798 @weavernet Sorry, now I get you. Both the producer and consumer have the MQClientInstance object as a property. Now the truth is either a producer of a consumer is created, A MQClientInstance attached with a pullMessageService is inited. Indeed, when it is a producer, the pullMessageService is useless. But if we both have consumer and producer in one process(they share one MQClientInstance instance), the pullMessageService is used for consumer, pulling messages. So IMO, init a pullMessageService in MQClientInstance is a rough, simple but useful way, for it is kind of difficult to know whether the client is a producer or consumer, or both of them.
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