SpringBoot之ActiveMQ實現延遲消息

【北京】 IT技術人員面對面試、跳槽、升職等問題，如何快速成長，獲得大廠入門資格和升職加薪的籌碼？與大廠技術大牛面對面交流，解答你的疑惑。《從職場小白到技術總監成長之路：我的職場焦慮與救贖》活動鏈接：碼客

恭喜fpx，新王登基，lpl*b 我們是冠軍

原文鏈接：https://juejin.im/post/5dcac1a051882551a95c92ab

一、安裝activeMQ

安裝步驟參照網上教程，本文不做介紹

二、修改activeMQ配置文件

broker新增配置信息 schedulerSupport="true"

<broker xmlns="http://activemq.apache.org/schema/core" brokerName="localhost" dataDirectory="${activemq.data}" schedulerSupport="true" >

        <destinationPolicy>
            <policyMap>
              <policyEntries>
                <policyEntry topic=">" >
                    <!-- The constantPendingMessageLimitStrategy is used to prevent
                         slow topic consumers to block producers and affect other consumers
                         by limiting the number of messages that are retained
                         For more information, see:

                         http://activemq.apache.org/slow-consumer-handling.html

                    -->
                  <pendingMessageLimitStrategy>
                    <constantPendingMessageLimitStrategy limit="1000"/>
                  </pendingMessageLimitStrategy>
                </policyEntry>
              </policyEntries>
            </policyMap>
        </destinationPolicy>

三、創建SpringBoot工程

配置ActiveMQ工廠信息，信任包必須配置否則會報錯

package com.example.demoactivemq.config;

import org.apache.activemq.ActiveMQConnectionFactory;
import org.apache.activemq.RedeliveryPolicy;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import java.util.ArrayList;
import java.util.List;

/**
 * @author shanks on 2019-11-12
 */
@Configuration
public class ActiveMqConfig {

    @Bean
    public ActiveMQConnectionFactory factory(@Value("${spring.activemq.broker-url}") String url){
        ActiveMQConnectionFactory factory = new ActiveMQConnectionFactory(url);
        // 設置信任序列化包集合
        List<String> models = new ArrayList<>();
        models.add("com.example.demoactivemq.domain");
        factory.setTrustedPackages(models);

        return factory;
    }

}

消息實體類

package com.example.demoactivemq.domain;

import lombok.Builder;
import lombok.Data;

import java.io.Serializable;

/**
 * @author shanks on 2019-11-12
 */

@Builder
@Data
public class MessageModel implements Serializable {
    private String titile;
    private String message;
}

生產者

package com.example.demoactivemq.producer;

import lombok.extern.slf4j.Slf4j;
import org.apache.activemq.ScheduledMessage;
import org.apache.activemq.command.ActiveMQQueue;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.autoconfigure.jms.JmsProperties;
import org.springframework.jms.core.JmsMessagingTemplate;
import org.springframework.stereotype.Service;

import javax.jms.*;
import java.io.Serializable;

/**
 * 消息生產者
 *
 * @author shanks
 */
@Service
@Slf4j
public class Producer {

    public static final Destination DEFAULT_QUEUE = new ActiveMQQueue("delay.queue");

    @Autowired
    private JmsMessagingTemplate template;

    /**
     * 發送消息
     *
     * @param destination destination是發送到的隊列
     * @param message     message是待發送的消息
     */
    public <T extends Serializable> void send(Destination destination, T message) {
        template.convertAndSend(destination, message);
    }

    /**
     * 延時發送
     *
     * @param destination 發送的隊列
     * @param data        發送的消息
     * @param time        延遲時間
     */
    public <T extends Serializable> void delaySend(Destination destination, T data, Long time) {
        Connection connection = null;
        Session session = null;
        MessageProducer producer = null;
        // 獲取連接工廠
        ConnectionFactory connectionFactory = template.getConnectionFactory();
        try {
            // 獲取連接
            connection = connectionFactory.createConnection();
            connection.start();
            // 獲取session，true開啓事務，false關閉事務
            session = connection.createSession(Boolean.TRUE, Session.AUTO_ACKNOWLEDGE);
            // 創建一個消息隊列
            producer = session.createProducer(destination);
            producer.setDeliveryMode(JmsProperties.DeliveryMode.PERSISTENT.getValue());
            ObjectMessage message = session.createObjectMessage(data);
            //設置延遲時間
            message.setLongProperty(ScheduledMessage.AMQ_SCHEDULED_DELAY, time);
            // 發送消息
            producer.send(message);
            log.info("發送消息：{}", data);
            session.commit();
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            try {
                if (producer != null) {
                    producer.close();
                }
                if (session != null) {
                    session.close();
                }
                if (connection != null) {
                    connection.close();
                }
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    }
}

消費者

package com.example.demoactivemq.producer;

import com.example.demoactivemq.domain.MessageModel;
import lombok.extern.slf4j.Slf4j;
import org.springframework.jms.annotation.JmsListener;
import org.springframework.stereotype.Component;

/**
 * 消費者
 */
@Component
@Slf4j
public class Consumer {

    @JmsListener(destination = "delay.queue")
    public void receiveQueue(MessageModel message) {
        log.info("收到消息:{}", message);
    }
}

application.yml

spring:
  activemq:
    broker-url: tcp://localhost:61616

測試類

package com.example.demoactivemq;

import com.example.demoactivemq.domain.MessageModel;
import com.example.demoactivemq.producer.Producer;
import org.junit.jupiter.api.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringRunner;

@SpringBootTest(classes = DemoActivemqApplication.class)
@RunWith(SpringRunner.class)
class DemoActivemqApplicationTests {

    /**
     * 消息生產者
     */
    @Autowired
    private Producer producer;

    /**
     * 及時消息隊列測試
     */
    @Test
    public void test() {
        MessageModel messageModel = MessageModel.builder()
                .message("測試消息")
                .titile("消息000")
                .build();
        // 發送消息
        producer.send(Producer.DEFAULT_QUEUE, messageModel);
    }

    /**
     * 延時消息隊列測試
     */
    @Test
    public void test2() {
        for (int i = 0; i < 5; i++) {
            MessageModel messageModel = MessageModel.builder()
                    .titile("延遲10秒執行")
                    .message("測試消息" + i)
                    .build();
            // 發送延遲消息
            producer.delaySend(Producer.DEFAULT_QUEUE, messageModel, 10000L);
        }
        try {
            // 休眠100秒，等等消息執行
            Thread.currentThread().sleep(100000L);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
    }

}

執行結果

2019-11-12 22:18:52.939  INFO 17263 --- [           main] c.e.demoactivemq.producer.Producer       : 發送消息：MessageModel(titile=延遲10秒執行, message=測試消息0)
2019-11-12 22:18:52.953  INFO 17263 --- [           main] c.e.demoactivemq.producer.Producer       : 發送消息：MessageModel(titile=延遲10秒執行, message=測試消息1)
2019-11-12 22:18:52.958  INFO 17263 --- [           main] c.e.demoactivemq.producer.Producer       : 發送消息：MessageModel(titile=延遲10秒執行, message=測試消息2)
2019-11-12 22:18:52.964  INFO 17263 --- [           main] c.e.demoactivemq.producer.Producer       : 發送消息：MessageModel(titile=延遲10秒執行, message=測試消息3)
2019-11-12 22:18:52.970  INFO 17263 --- [           main] c.e.demoactivemq.producer.Producer       : 發送消息：MessageModel(titile=延遲10秒執行, message=測試消息4)
2019-11-12 22:19:03.012  INFO 17263 --- [enerContainer-1] c.e.demoactivemq.producer.Consumer       : 收到消息:MessageModel(titile=延遲10秒執行, message=測試消息0)
2019-11-12 22:19:03.017  INFO 17263 --- [enerContainer-1] c.e.demoactivemq.producer.Consumer       : 收到消息:MessageModel(titile=延遲10秒執行, message=測試消息1)
2019-11-12 22:19:03.019  INFO 17263 --- [enerContainer-1] c.e.demoactivemq.producer.Consumer       : 收到消息:MessageModel(titile=延遲10秒執行, message=測試消息2)
2019-11-12 22:19:03.020  INFO 17263 --- [enerContainer-1] c.e.demoactivemq.producer.Consumer       : 收到消息:MessageModel(titile=延遲10秒執行, message=測試消息3)
2019-11-12 22:19:03.021  INFO 17263 --- [enerContainer-1] c.e.demoactivemq.producer.Consumer       : 收到消息:MessageModel(titile=延遲10秒執行, message=測試消息4)

比你優秀的人比你還努力，你有什麼資格不去奮鬥!!!

（想自學習編程的小夥伴請搜索圈T社區，更多行業相關資訊更有行業相關免費視頻教程。完全免費哦!）

SpringBoot之ActiveMQ實現延遲消息

一、安裝activeMQ

二、修改activeMQ配置文件

三、創建SpringBoot工程

配置ActiveMQ工廠信息，信任包必須配置否則會報錯

消息實體類

生產者

消費者

application.yml

測試類

執行結果

Spring源碼探究：容器

Redis持久化的幾種方式——深入解析RDB

B樹？這篇文章徹底看懂了！

SpringBoot之ActiveMQ實現延遲消息

死磕 java線程系列之終篇(恭喜fpx)

https://yachay.unat.edu.pe/blog/index.php?comment_area=format_blog&comment_component=blog&comment_co

linux以太網驅動總結