RockerMQ，push消费

public class PushConsumer {
    public static void main(String[] args) throws Exception {
        DefaultMQPushConsumer consumer = new DefaultMQPushConsumer("xx-consumer");// 实际组名
        consumer.setToken("token");// 实际Token
        consumer.setNamesrvAddr("ip:port;ip1:port1");// 实际地址，分号分隔
        consumer.setConsumeFromWhere(ConsumeFromWhere.CONSUME_FROM_FIRST_OFFSET);// 从最开始处开始消费
        consumer.subscribe("TOPIC", "*");// Tag 用于消费过滤，不需要可使用"*"

        consumer.registerMessageListener(new MessageListenerConcurrently() {
            @Override
            public ConsumeConcurrentlyStatus consumeMessage(List msgs, ConsumeConcurrentlyContext context) {
                System.out.println(Thread.currentThread().getName() + " Receive New Messages: " + msgs);
                // 返回成功，消息会被ACK
                return ConsumeConcurrentlyStatus.CONSUME_SUCCESS;
            }
        });

        consumer.start();
        System.out.printf("Consumer Started.%n");
    }
}

注意：return ConsumeConcurrentlyStatus.CONSUME_SUCCESS; 需要确定是集群部署还是广播模式部署，集群只给一个订阅者发送消息，注意不要消费了别人的消息；广播模式会给所有订阅者发送消息，消费的时候要都返回ack，否则轮询次数超过限定值（默认16次）会进入私信队列，会有报警。