RocketMQ实战(java代码示例)

这里给大家演示个生产消息、订阅消费消息的常规示例代码！

当然rocketmq 强大的功能和多种模式不仅仅局限于此，

大家可以研究其官方代码示例或去我的github 上看我在工作中的实战代码示例哦！

一: 生产者

public static void main(String[] args) throws MQClientException, InterruptedException {
            DefaultMQProducer producer = new DefaultMQProducer("unique_group_name_quickstart");
            producer.setNamesrvAddr("172.30.248.219:9876");
            producer.setInstanceName("QuickStartProducer");
            producer.start();

            for (int i = 0; i < 100; i++) {
                try {
                    Message msg = new Message("TopicTest",// topic
                            "TagA",// tag
                            ("Hello RocketMQ By Dy" + i).getBytes(RemotingHelper.DEFAULT_CHARSET)// body
                    );
                    SendResult sendResult = producer.send(msg);

                    System.out.println(sendResult);
                } catch (Exception e) {
                    e.printStackTrace();
                    Thread.sleep(1000);
                }
            }

            producer.shutdown();
        }

二：消费者：

public static void main(String[] args) throws InterruptedException, MQClientException {
    DefaultMQPushConsumer consumer = new DefaultMQPushConsumer("unique_group_name_quickstart");

    consumer.setConsumeFromWhere(ConsumeFromWhere.CONSUME_FROM_FIRST_OFFSET);

    consumer.setNamesrvAddr("172.30.248.219:9876");
    consumer.setInstanceName("QuickStartConsumer");

    consumer.subscribe("TopicTest", "TagA3");


    consumer.registerMessageListener(new MessageListenerConcurrently() {
        @Override
        public ConsumeConcurrentlyStatus consumeMessage(List<MessageExt> msgs,
                                                        ConsumeConcurrentlyContext context) {
            System.out.println(Thread.currentThread().getName() + " Receive New Messages: " + msgs);
           for (Message msg :msgs){
               System.out.println(new String(msg.getBody()));
           }
            return ConsumeConcurrentlyStatus.CONSUME_SUCCESS;
        }
    });

    consumer.start();

    System.out.println("Consumer Started.");
}

转载于:https://my.oschina.net/dyyweb/blog/756145