消息队列中间件是分布式系统中重要的组件,主要解决应用耦合,异步消息,流量削锋等问题。实现高性能,高可用,可伸缩和最终一致性架构;是大型分布式系统不可缺少的中间件。目前使用较多的消息队列有ActiveMQ、RabbitMQ、Kafka、RocketMQ、MetaMQ等。spring boot提供了对JMS系统的支持;springboot很方便就可以集成这些消息中间件。
对于异步消息在实际的应用之中会有两类:
JMS:代表作就是 ActiveMQ,但是其性能不高,因为其是用 java 程序实现的。
AMQP:直接利用协议实现的消息组件,其大众代表作为RabbitMQ,高性能代表作为Kafka。
1、新建项目,对应的pom.xml文件如下
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>spring-cloud</groupId>
<artifactId>sc-activeMQ</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>sc-activeMQ</name>
<url>http://maven.apache.org</url>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.0.4.RELEASE</version>
</parent>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-dependencies</artifactId>
<version>Finchley.RELEASE</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<maven.compiler.source>1.8</maven.compiler.source>
<maven.compiler.target>1.8</maven.compiler.target>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-activemq</artifactId>
</dependency>
<dependency>
<groupId>org.apache.activemq</groupId>
<artifactId>activemq-core</artifactId>
<version>5.7.0</version>
</dependency>
<dependency>
<groupId>org.apache.activemq</groupId>
<artifactId>activemq-pool</artifactId>
</dependency>
<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>
</dependencies>
</project>
2、新建springboot启动类ActiveMqApplication.java
package sc.activemq;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
public class ActiveMqApplication {
public static void main(String[] args) {
SpringApplication.run(ActiveMqApplication.class, args);
}
}
3、新建配置文件application.yml
server:
port: 9080
spring:
appliction:
name: sc-activemq
activemq:
broker-url: tcp://localhost:61616
in-memory: true
user: admin
password: admin
pool:
enabled: true
max-connections: 50
expiry-timeout: 10000
idle-timeout: 30000
jms:
pub-sub-domain: false #默认情况下activemq提供的是queue模式,若要使用topic模式需要配置pub-sub-domain为true
说明:默认情况下activemq提供的是queue模式,若要使用topic模式需要配置spring.jms.pub-sub-domain为true
4、新建消费生产者
package sc.activemq.service.impl;
import javax.jms.Destination;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.jms.core.JmsMessagingTemplate;
import org.springframework.stereotype.Service;
import sc.activemq.service.ProductService;
@Service
public class ProductServiceImpl implements ProductService {
@Autowired
private JmsMessagingTemplate jmsMessagingTemplate;
@Override
public void sendMessage(Destination destination, String message) {
jmsMessagingTemplate.convertAndSend(destination, message);
}
}
5、新建消息消费者
队列模式:
package sc.activemq.service.consumer;
import org.springframework.jms.annotation.JmsListener;
import org.springframework.stereotype.Component;
@Component
public class ConsumerQueue {
// 使用JmsListener配置消费者监听的队列,其中text是接收到的消息
@JmsListener(destination = "jms-queue")
public void receiveQueue(String text) {
System.out.println("ConsumerQueue收到:" + text);
}
}
订阅模式:
package sc.activemq.service.consumer;
import org.springframework.jms.annotation.JmsListener;
import org.springframework.stereotype.Component;
@Component
public class ConsumerTopic {
// 使用JmsListener配置消费者监听的队列,其中text是接收到的消息
@JmsListener(destination = "jms-topic")
public void receiveQueue(String text) {
System.out.println("ConsumerTopic收到:" + text);
}
}
6、新建测试类
package sc.activemq;
import org.apache.activemq.command.ActiveMQQueue;
import org.apache.activemq.command.ActiveMQTopic;
import org.junit.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;
import sc.activemq.service.ProductService;
@RunWith(SpringRunner.class)
@SpringBootTest
public class ActiveMqTest {
@Autowired
private ActiveMQQueue queue;
@Autowired
private ActiveMQTopic topic;
@Autowired
private ProductService productService;
@Test
public void testJms() {
String msgQueue = "send 黄金 ";
for(int i=0; i<5; i++){
productService.sendMessage(this.queue, msgQueue+i);
}
String msgTopic = "send 白银 ";
for(int i=0; i<5; i++){
productService.sendMessage(this.topic, msgTopic+i);
}
try {
Thread.sleep(10000);
} catch (InterruptedException e) {
}
}
}
7、进行测试
先登录ActiveMq管理平台:http://localhost:8161/
队列模式:
(1)配置spring.jms.pub-sub-domain为false
(2)注释测试类的如下代码
(3)运行测试类
订阅模式:
(1)配置spring.jms.pub-sub-domain为true
(2)注释测试类的如下代码
(3)运行测试类
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