模块之间的依赖也称之为耦合。而耦合越多,之后的维护工作就越困难。那么如果改善系统模块调用关系、减少模块之间的耦合呢?我们接下来就介绍一种解决方案----消息中间件
1. Spring整合ActiveMQ
环境配置
- 官网地址: https://activemq.apache.org/
- 下载成功后解压,进入bin目录执行
./active start
即可 - web 服务器地址:8161
- 服务调用接口 : 61616
- 用户名密码均为 admin
1.1 环境准备
- pom文件引入坐标依赖
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>4.1.7.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<version>4.1.7.RELEASE</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
</dependency>
<!--Spring整合activeMQ-->
<dependency>
<groupId>org.apache.activemq</groupId>
<artifactId>activemq-all</artifactId>
<version>5.14.0</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jms</artifactId>
<version>4.1.7.RELEASE</version>
</dependency>
-
resources/spring/application.xml
配置文件中整合activeMq
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:dubbo="http://code.alibabatech.com/schema/dubbo" xmlns:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd
http://code.alibabatech.com/schema/dubbo http://code.alibabatech.com/schema/dubbo/dubbo.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">
<!-- 把AcitveMQ连接工厂交给spring管理 -->
<bean id="activeMQConnectionFactory" class="org.apache.activemq.ActiveMQConnectionFactory">
<constructor-arg name="brokerURL" value="tcp://192.168.25.120:61616"></constructor-arg>
</bean>
<!-- 用springjms工厂接管activeMQ-->
<bean id="singleConnectionFactory" class="org.springframework.jms.connection.SingleConnectionFactory">
<property name="targetConnectionFactory" ref="activeMQConnectionFactory"></property>
</bean>
<!-- 创建springjms提供的模板对象 -->
<bean id="jmsTemplate" class="org.springframework.jms.core.JmsTemplate">
<property name="connectionFactory" ref="singleConnectionFactory"></property>
</bean>
<!-- 指定消息发送空间 点对点模式-->
<bean id="queue" class="org.apache.activemq.command.ActiveMQQueue">
<constructor-arg value="queue"></constructor-arg>
</bean>
<!-- 指定消息发送空间 点对点模式-->
<bean id="topic" class="org.apache.activemq.command.ActiveMQTopic">
<constructor-arg value="topic"></constructor-arg>
</bean>
</beans>
1.2 spring整合后发送消息
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.jms.core.JmsTemplate;
import org.springframework.jms.core.MessageCreator;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
import javax.jms.JMSException;
import javax.jms.Message;
import javax.jms.Session;
/**
* @ Description
* @ auther 宁宁小可爱
* @ create 2020-02-05 14:44
*/
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations = "classpath*:spring/applicationContext-mq-provider.xml")
public class SpringProvider {
// 注入消息模板对象
@Autowired
private JmsTemplate jmsTemplate;
// 注入点对点消息空间对象
@Autowired
private ActiveMQQueue activeMQQueue;
// 注入发布订阅消息空间对象
@Autowired
private ActiveMQTopic activeMQTopic;
/*
* 模式: 点对点
* 需求发送消息
* */
@Test
public void sendMessageQueue(){
jmsTemplate.send(activeMQQueue, new MessageCreator() {
@Override
public Message createMessage(Session session) throws JMSException {
return session.createTextMessage("spring整合activeMQ,点对点模式发送消息");
}
});
}
/*
* 模式: 发布订阅
* 需求发送消息
* */
@Test
public void sendMessageTopic(){
jmsTemplate.send(activeMQTopic, new MessageCreator() {
@Override
public Message createMessage(Session session) throws JMSException {
return session.createTextMessage("spring整合activeMQ,发布订阅模式发送消息");
}
});
}
}
- 结果展示
5.2 spring整合后接收消息
- application配置文件中需要配置接收消息的参数
- 更改点对点和发布订阅模式只需要更改配置文件即可
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:dubbo="http://code.alibabatech.com/schema/dubbo" xmlns:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd
http://code.alibabatech.com/schema/dubbo http://code.alibabatech.com/schema/dubbo/dubbo.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">
<!-- 把AcitveMQ连接工厂交给spring管理 -->
<bean id="activeMQConnectionFactory" class="org.apache.activemq.ActiveMQConnectionFactory">
<constructor-arg name="brokerURL" value="tcp://192.168.25.120:61616"></constructor-arg>
</bean>
<!-- 用springjms工厂接管activeMQ-->
<bean id="singleConnectionFactory" class="org.springframework.jms.connection.SingleConnectionFactory">
<property name="targetConnectionFactory" ref="activeMQConnectionFactory"></property>
</bean>
<!-- 指定消息发送空间 点对点模式-->
<bean id="queue" class="org.apache.activemq.command.ActiveMQQueue">
<constructor-arg value="queue"></constructor-arg>
</bean>
<!-- 指定消息发送空间 点对点模式-->
<bean id="topic" class="org.apache.activemq.command.ActiveMQTopic">
<constructor-arg value="topic"></constructor-arg>
</bean>
<!--监听器对象 接收消息 自己定义-->
<bean id="myMessageListener" class="com.tysc.search.service.listener.MyMessageListener"></bean>
<!-- 监听器出发监听容器,spring jms提供的-->
<bean id="listenerContainer" class="org.springframework.jms.listener.DefaultMessageListenerContainer">
<property name="connectionFactory" ref="singleConnectionFactory"></property>
<!-- 指定接收消息的服务地址-->
<property name="destination" ref="queue"></property>
<!-- 指定消息监听器-->
<property name="messageListener" ref="myMessageListener"></property>
</bean>
</beans>
定义监听器
package com.tysc.search.service.listener;
import javax.jms.JMSException;
import javax.jms.Message;
import javax.jms.MessageListener;
import javax.jms.TextMessage;
/**
* @ Description
* @ auther 宁宁小可爱
* @ create 2020-02-05 15:02
*/
public class MyMessageListener implements MessageListener {
@Override
public void onMessage(Message message) {
// 获取消息
if (message instanceof TextMessage){
TextMessage msg = (TextMessage) message;
try {
String text = msg.getText();
System.out.println("接收消息: "+text);
} catch (JMSException e) {
e.printStackTrace();
}
}
}
}
接收消息
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.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import org.springframework.jms.core.JmsTemplate;
import org.springframework.jms.core.MessageCreator;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
import javax.jms.JMSException;
import javax.jms.Message;
import javax.jms.Session;
/**
* @ Description
* @ auther 宁宁小可爱
* @ create 2020-02-05 14:44
*/
public class SpringConsumer {
/*
* 需求: 接收消息
* 因为我们有自己定义的监听器,所以不需要做任何事情,只需要加载配置文件即可
* */
@Test
public void recvMessageTopic() throws Exception{
ApplicationContext app = new ClassPathXmlApplicationContext("classpath*:spring/applicationContext-mq-consumer.xml");
System.in.read();
}
}
- 结果展示