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java实现消息队列的两种方式(小结)

2019-04-11 09:17 615 查看

实现消息队列的两种方式

Apache ActiveMQ官方实例发送消息

直接在Apache官网http://activemq.apache.org/download-archives.html下载ActiveMQ源码

下载解压后拿到java代码实例

 

然后倒入IDE

如下:

 

请认真阅读readme.md文件,大致意思就是把项目打成两个jar包,然后启动服务,然后同时运行打的两个jar包,然后就能看到具体的调用信息。打jar包时直接利用maven打就行了,不用修改代码。

启动服务:

 

利用Spring消息模板发送消息

Spirng对Apache ActiveMQ提供了很好的支持

 

生成者代码:

package com.jms.service.impl;

import com.jms.service.ProducerService;
import org.springframework.jms.core.JmsTemplate;
import org.springframework.stereotype.Service;

import javax.annotation.Resource;
import javax.jms.Destination;

/**
* 发送消息
*/
@Service
public class ProducerServiceImpl implements ProducerService {

@Resource
private JmsTemplate jmsTemplate;

public void sendMessage(Destination destination, String msg) {
System.out.println("向队列"+destination+"发送消息");
jmsTemplate.convertAndSend(destination,msg);
}

public void sendMessage(String msg) {
System.out.println("向队列"+jmsTemplate.getDefaultDestination().toString()+"发送消息");
jmsTemplate.convertAndSend(msg);
}
}

消费者代码:

package com.jms.service.impl;

import com.jms.service.CustomerService;
import org.springframework.jms.core.JmsTemplate;
import org.springframework.stereotype.Service;

import javax.annotation.Resource;
import javax.jms.Destination;
import javax.jms.JMSException;
import javax.jms.TextMessage;

@Service
public class CustomerServiceImpl implements CustomerService {

@Resource
private JmsTemplate jmsTemplate;
/**
* 接收消息
* @param destination
*/
public void receive(Destination destination) {

TextMessage textMessage = (TextMessage) jmsTemplate.receive(destination);
try {
System.out.println("从队列》"+destination.toString()+"成功获取消息》"+textMessage.getText());
} catch (JMSException e) {
e.printStackTrace();
}

}
}

Spring配置代码

<?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:context="http://www.springframework.org/schema/context"
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/context
http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc.xsd
">

<!-- 启动包扫描功能,以便注册带有@Controller、@Service、@repository、@Component等注解的类成为spring的bean -->
<context:component-scan base-package="com.jms.service"> </context:component-scan>

<!-- 配置根视图 -->
<!--<mvc:view-controller path="/" view-name="index"/>-->

<!--启用注解-->
<mvc:annotation-driven />

<!-- 视图层配置 -->
<!--<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">-->
<!--<property name="prefix" value="/WEB-INF/view/"/>-->
<!--<property name="suffix" value=".jsp"/>-->
<!--</bean>-->

<!-- 配置JMS连接工厂 -->
<bean id="connectionFactory" class="org.apache.activemq.ActiveMQConnectionFactory">
<property name="brokerURL" value="tcp://localhost:61616" />
</bean>

<!-- 定义消息队列(Queue) -->
<bean id="queueDestination" class="org.apache.activemq.command.ActiveMQQueue">
<!-- 设置消息队列的名字 -->
<constructor-arg>
<value>queue1</value>
</constructor-arg>
</bean>

<!-- 配置JMS模板(Queue),Spring提供的JMS工具类,它发送、接收消息。 -->
<bean id="jmsTemplate" class="org.springframework.jms.core.JmsTemplate">
<property name="connectionFactory" ref="connectionFactory" />
<property name="defaultDestination" ref="queueDestination" />
<property name="receiveTimeout" value="10000" />
</bean>
</beans>

测试代码

package com.jsm.test;

import com.jms.service.CustomerService;
import com.jms.service.ProducerService;
import org.junit.Test;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import javax.jms.Destination;

/**
* 消息队列测试类
*/
public class JmsTest {

@Test
public void producerTest(){

ClassPathXmlApplicationContext springContext = new ClassPathXmlApplicationContext(new String[]{"classpath:spring-core.xml"});
ProducerService producerService = (ProducerService)springContext.getBean("producerServiceImpl");
CustomerService customerService = (CustomerService)springContext.getBean("customerServiceImpl");

Destination destination = (Destination)springContext.getBean("queueDestination");
producerService.sendMessage("测试消息队列");
customerService.receive(destination);
}
}

测试结果

 

代码地址

https://github.com/wahnn/SpringJMS
https://gitee.com/wahnn/SpringJMS

以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持脚本之家。

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