ActiveMQ 发布-订阅

基础

1. 引入依赖

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-activemq</artifactId>
</dependency>

<dependency>
    <groupId>org.messaginghub</groupId>
    <artifactId>pooled-jms</artifactId>
</dependency>

2. 基础配置

#ActiveMQ
##基本配置
spring.activemq.broker-url=tcp://192.168.1.122:61616
spring.activemq.user=admin
spring.activemq.password=admin
## 集群配置
#spring.activemq.broker-url=failover:(tcp://192.168.1.122:61616,tcp://192.168.1.122:61617)
## 线程池配置
spring.activemq.pool.enabled=true
spring.activemq.pool.max-connections=50
## 开启支持发布订阅模式，默认是点对点模式
spring.jms.pub-sub-domain=true

发布

1. 定义Topic

@Bean
Topic topic() {

    return new ActiveMQTopic("news.topic");
}

2. 发布服务

import javax.jms.Destination;
/**
 *  @title 新闻发布
 *  @Desc
 *  @author <a href="mailto:[email protected]">avaos.wei</a>
 *  @Date 2020-03-27 16:52
 *
 */
public interface NewsProducerService {

    /**
     * @title 发布消息
     * @desc  描述
     * @param msg: 待发布的内容
     * @return
     * @author <a href="mailto:[email protected]">avaos.wei</a>
     * @date 2020-03-27 16:52
     */
    void publish(String msg);

}

import cn.avaos.service.NewsProducerService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.jms.core.JmsMessagingTemplate;
import org.springframework.stereotype.Service;

import javax.jms.Topic;

@Service
public class NewsProducerServiceImpl implements NewsProducerService {

    @Autowired
    private JmsMessagingTemplate jmsTemplate;

    @Autowired
    private Topic topic;

    @Override
    public void publish(String msg) {
        jmsTemplate.convertAndSend(topic, msg);
    }
}

3. 对外API

import cn.avaos.service.NewsProducerService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

@Slf4j
@RestController
@RequestMapping("/api/news")
public class NewsController {

    @Autowired
    private NewsProducerService newsProducerService;

    @GetMapping
    public Object produce(String msg) {
        newsProducerService.publish(msg);

        log.info("produce: 发布消息-{}", msg);

        return "success";
    }
}

订阅

import lombok.extern.slf4j.Slf4j;
import org.springframework.jms.annotation.JmsListener;
import org.springframework.stereotype.Component;

@Slf4j
@Component
public class TopicConsumer {

    @JmsListener(destination = "news.topic")
    public void receive1(String msg) {
        log.info("{} 接收到消息: {}", "1号", msg);
    }

    @JmsListener(destination = "news.topic")
    public void receive2(String msg) {
        log.info("{} 接收到消息: {}", "2号", msg);
    }

    @JmsListener(destination = "news.topic")
    public void receive3(String msg) {
        log.info("{} 接收到消息: {}", "3号", msg);
    }

    @JmsListener(destination = "news.topic")
    public void receive4(String msg) {
        log.info("{} 接收到消息: {}", "4号", msg);
    }

}