activeMQ learning (II integrates with springboot)

POOM file

Import the required activemq jar first packet

<dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-activemq</artifactId>
        </dependency>
    </dependencies>

 

Producers

application.yml

server:
  port: 8090
  servlet:
    context-path: /activemqProducer
spring:
  activemq:
    broker-url: tcp://127.0.0.1:61616
    user: 123
    password: 123

ActiveMqConfig

package com.example.activemqtest.config;

import org.apache.activemq.command.ActiveMQQueue;
import org.apache.activemq.command.ActiveMQTopic;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import javax.jms.Queue;
import javax.jms.Topic;

@Configuration
public class ActiveMQConfig {

    @Bean
    public Queue queue(){
        return new ActiveMQQueue("queue2");
    }

    @Bean
    public Topic topic(){
        return new ActiveMQTopic("topic2");
    }

}

Producers arranged to send a message queue or topic, the injection spring

ProducterController

package com.example.activemqtest.controller;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.jms.core.JmsMessagingTemplate;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

import javax.jms.Queue;
import javax.jms.Topic;


@RestController
public class ProducterController {

    @Autowired
    private JmsMessagingTemplate jmsMessagingTemplate;

    @Autowired
    private Queue queue;

    @Autowired
    private Topic topic;


    @GetMapping("/sendMsgByQueue")
    public String sendMsgByQueue(String msg){
        jmsMessagingTemplate.convertAndSend(queue,msg);
        return msg;
    }

    @GetMapping("/sendMsgByTopic")
    public String sendMsgByTopic(String msg){
        jmsMessagingTemplate.convertAndSend(topic,msg);
        return msg;
    }
}

consumer

@JmsListener (Where do you want = "Queue2" )
     // method returns to a queue3 
    @SendTo ( "queue3" )
     public String the handleMessage (String MSG) { 
        System.out.println ( "received return is:" + MSG);
         return "returns:" + MSG; 
    }

These are the way consumers receive queue queue2

To receive topic, you need to increase the allocation

server:
  port: 8091
  servlet:
    context-path: /activemqConsumer
spring:
  activemq:
    broker-url: tcp://127.0.0.1:61616
    user: 123
    password: 123
  jms:
    pub-sub-domain: true

 

@JmsListener (Where do you want = "topic2" )
     public  void topicConsumer1 (String MSG) { 
        System.out.println ( "consumer is receiving 1:" + MSG); 
    } 

    @JmsListener (Where do you want = "topic2" )
     public  void topicConsumer2 (String MSG) { 
        System.out.println ( "consumer 2 receives as:" + MSG); 
    }