返回目录:金融新闻
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。springboot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/4.0.0http://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;@SpringBootApplicationpubli cclass ActiveMqApplication {public static void main(String[] args){SpringApplication.run(ActiveMqApplication.class, args);}}
3、新建配置文件application.yml
server:port: 9080spring:appliction:name: sc-activemqactivemq:broker-url:tcp://localhost:61616in-memory: trueuser: adminpassword: adminpool:enabled: truemax-connections: 50expiry-timeout:10000idle-timeout: 30000jms: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;@Servicepublicclass ProductServiceImpl implements ProductService {@Autowiredprivate JmsMessagingTemplate jmsMessagingTemplate;@Overridepublic void sendMessage(Destinationdestination, 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;@Componentpublicclass 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;@Componentpublicclass 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)@SpringBootTestpublicclass ActiveMqTest {@Autowiredprivate ActiveMQQueue queue;@Autowiredprivate ActiveMQTopic topic;@Autowiredprivate ProductService productService;@Testpublic void testJms() {String msgQueue = "send 黄金 ";for(inti=0; i<5; i++){productService.sendMessage(this.queue, msgQueue+i);}String msgTopic = "send 白银 ";for(inti=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