DefaultMQPushConsumerImpl
MQClientInstance
MQProducer
+send()
MessageQueue
+ topic：String+ brokerName：String+queueId：int
MQConsumer
DefaultMQPullConsumerImpl
DefaultMQPullConsumer
TransactionMQProducer
DefaultMQProducer
MQPushConsumer
DefaultMQProducerImpl
TopicPublishInfo
MQClientAPIImpl
MQAdmin
DefaultMQPushConsumer
MQPullConsumer
