rocketmq4.3.0消费者生成者官方测试用例

rocketmq4.3.0消费者生成者官方测试用例

• 注意客户端和服务端的版本最好一致！！

添加rocketmq的依赖

<dependency>
    <groupId>org.apache.rocketmq</groupId>
    <artifactId>rocketmq-client</artifactId>
    <version>4.3.0</version>
</dependency>

可靠的同步传输广泛应用于场景，如重要通知消息、短信通知、短信营销系统等。

• 消费者分组
• rocketmq地址
• 主题、二级主题（tag）、消息

/**
 * 可靠的同步传输广泛应用于场景，如重要通知消息、短信通知、短信营销系统等。
 */
public class SyncProducer {
    public static void main(String[] args) throws Exception {
        //Instantiate with a producer group name.
        DefaultMQProducer producer = new
            DefaultMQProducer("please_rename_unique_group_name");
        // Specify name server addresses.
        producer.setNamesrvAddr("192.168.102.134:9876");
        //Launch the instance.
        producer.start();
        for (int i = 0; i < 100; i++) {
            //Create a message instance, specifying topic, tag and message body.
            Message msg = new Message("cancan" /* Topic */,
                "TagA" /* Tag */,
                ("Hello RocketMQ " +
                    i).getBytes(RemotingHelper.DEFAULT_CHARSET) /* Message body */
            );
            //Call send message to deliver message to one of brokers.
            SendResult sendResult = producer.send(msg);
            System.out.printf("%s%n", sendResult);
        }
        //Shut down once the producer instance is not longer in use.
        producer.shutdown();
    }
}

消费者

• 消费组
• 消费者地址
• 主题、二级主题（tag）

/**
 * 消费生产者数据
 */
public class Consumer {

    public static void main(String[] args) throws InterruptedException, MQClientException {

        // Instantiate with specified consumer group name.
        DefaultMQPushConsumer consumer = new DefaultMQPushConsumer("please_rename_unique_group_name");
         
        // Specify name server addresses.
        consumer.setNamesrvAddr("localhost:9876");
        
        // Subscribe one more more topics to consume.
        //订阅主题，后面的*为二级主题，也称为tag
        consumer.subscribe("TopicTest", "*");
        // Register callback to execute on arrival of messages fetched from brokers.
        consumer.registerMessageListener(new MessageListenerConcurrently() {

            @Override
            public ConsumeConcurrentlyStatus consumeMessage(List<MessageExt> msgs,
                                                            ConsumeConcurrentlyContext context) {
                System.out.printf("%s Receive New Messages: %s %n", Thread.currentThread().getName(), msgs);
                for (MessageExt msg : msgs) {
                    String str = new String(msg.getBody());
                    System.out.println("获取消息体："+str);
                }
                return ConsumeConcurrentlyStatus.CONSUME_SUCCESS;
            }
        });

        //Launch the consumer instance.
        consumer.start();

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

异步传输通常用于响应时间敏感的业务场景。

• 消费者分组
• rocketmq地址
• 主题、二级主题（tag）、key（Message 索引键，RocketMQ可以利用这些key快速检索到消息）、消息

/**
 * 异步传输通常用于响应时间敏感的业务场景。
 */
public class AsyncProducer {
    public static void main(String[] args) throws Exception {
        //Instantiate with a producer group name.
        DefaultMQProducer producer = new DefaultMQProducer("please_rename_unique_group_name");
        // Specify name server addresses.
        producer.setNamesrvAddr("192.168.102.134:9876");
        //Launch the instance.
        producer.start();
        producer.setRetryTimesWhenSendAsyncFailed(0);

        int messageCount = 103;//发送消息数量
        final CountDownLatch countDownLatch = new CountDownLatch(messageCount);//定义条件

        for (int i = 0; i < 100; i++) {
                final int index = i;
                //Create a message instance, specifying topic, tag and message body.
                Message msg = new Message("TopicTest",
                    "TagA",
                    "OrderID188",
                    "Hello world".getBytes(RemotingHelper.DEFAULT_CHARSET));
                producer.send(msg, new SendCallback() {

                    public void onSuccess(SendResult sendResult) {
                        countDownLatch.countDown();
                        System.out.printf("%-10d OK %s %n", index,
                            sendResult.getMsgId());
                    }

                    public void onException(Throwable e) {
                        countDownLatch.countDown();
                        System.out.printf("%-10d Exception %s %n", index, e);
                        e.printStackTrace();
                    }
                });
        }
        //Shut down once the producer instance is not longer in use.
        //Thread.sleep(3000);    //延迟主线程的执行时间
        countDownLatch.await(5, TimeUnit.SECONDS);//达到100关闭生产（发送者）
        producer.shutdown();
    }
}

单向传输用于需要中等可靠性的情况，如日志收集。

• 消费者分组
• rocketmq地址
• 主题、二级主题（tag）、消息

/**
 * 单向传输用于需要中等可靠性的情况，如日志收集。
 */
public class OnewayProducer {

    public static void main(String[] args) throws Exception{
        //Instantiate with a producer group name.
        DefaultMQProducer producer = new DefaultMQProducer("please_rename_unique_group_name");
        // Specify name server addresses.
        producer.setNamesrvAddr("192.168.102.134:9876");
        //Launch the instance.
        producer.start();
        for (int i = 0; i < 100; i++) {
            //Create a message instance, specifying topic, tag and message body.
            Message msg = new Message("TopicTest" /* Topic */,
                "TagA" /* Tag */,
                ("Hello RocketMQ " +
                    i).getBytes(RemotingHelper.DEFAULT_CHARSET) /* Message body */
            );
            //Call send message to deliver message to one of brokers.
            producer.sendOneway(msg);

        }
        //Shut down once the producer instance is not longer in use.
        producer.shutdown();
    }
}

rocketmq关键字说明

参考我之前发的文章： https://blog.csdn.net/qq_34168515/article/details/106534430