springboot整合rocketMQ示例

1、引入pom.xml

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

2、常量配置

public class JmsConfig {

    /**
     * 端口
     */
    public static final String NAME_SERVER = "192.168.0.55:9876";

    /**
     * topic,消息依賴於topic
     */
    public static final String TOPIC = "pay_test_topic";
}

3、生產者配置

@Component
public class PayProducer {

    /**
     * 生產組,生產者必須在生產組內
     */
    private String producerGroup = "pay_producer_group";

    private DefaultMQProducer producer;

    public PayProducer() {
        producer = new DefaultMQProducer(producerGroup);
        // 指定nameServer地址,多個地址之間以 ; 隔開
        producer.setNamesrvAddr(JmsConfig.NAME_SERVER);
        start();
    }

    public DefaultMQProducer getProducer() {
        return producer;
    }

    /**
     * 對象在使用之前必須調用一次,並且只能初始化一次
     */
    public void start() {
        try {
            this.producer.start();
        } catch (MQClientException e) {
            e.printStackTrace();
        }
    }

    /**
     * 一般在應用上下文,使用上下文監聽器,進行關閉
     */
    public void shutdown() {
        producer.shutdown();
    }

}

4、消費者配置

@Component
public class PayConsumer {

    private DefaultMQPushConsumer consumer;

    private String consumerGroup = "pay_consumer_group";

    public PayConsumer() throws MQClientException {
        consumer = new DefaultMQPushConsumer(consumerGroup);
        consumer.setNamesrvAddr(JmsConfig.NAME_SERVER);
        // 設置消費地點,從最後一個進行消費(其實就是消費策略)
        consumer.setConsumeFromWhere(ConsumeFromWhere.CONSUME_FROM_LAST_OFFSET);
        // 訂閱主題的哪些標籤
        consumer.subscribe(JmsConfig.TOPIC, "*");
        // 註冊監聽器
        consumer.registerMessageListener((MessageListenerConcurrently)
                (msgs, context) -> {
                    try {
                        // 獲取Message
                        Message msg = msgs.get(0);
                        System.out.printf("%s Receive New Messages: %s %n",
                                Thread.currentThread().getName(), new String(msgs.get(0).getBody()));
                        String topic = msg.getTopic();
                        String body = new String(msg.getBody(), "utf-8");
                        // 標籤
                        String tags = msg.getTags();
                        String keys = msg.getKeys();
                        System.out.println("topic=" + topic + ", tags=" + tags + ",keys=" + keys + ", msg=" + body);
                        return ConsumeConcurrentlyStatus.CONSUME_SUCCESS;
                    } catch (UnsupportedEncodingException e) {
                        e.printStackTrace();
                        return ConsumeConcurrentlyStatus.RECONSUME_LATER;
                    }
                });
        consumer.start();
        System.out.println("Consumer Listener");
    }
}

5、模擬接口

@RestController
public class PayController {

    @Autowired
    private PayProducer payProducer;


    @RequestMapping("/api/v1/pay_cb")
    public Object callback(String text) throws InterruptedException, RemotingException, MQClientException, MQBrokerException {
        // 創建消息  主題   二級分類   消息內容好的字節數組
        Message message = new Message(JmsConfig.TOPIC, "taga", ("hello rocketMQ " + text).getBytes());

        SendResult send = payProducer.getProducer().send(message);

        System.out.println(send);

        return new HashMap<>();
    }

}