Activemq整合spring

最新推荐文章于 2021-08-14 23:17:00 发布

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本文详细介绍如何将ActiveMQ与Spring框架整合，包括配置步骤、依赖引入及代码示例。通过整合，可以轻松实现消息的生产和消费。

1. Activemq整合spring

1.1. 使用方法

第一步：引用相关的jar包。

<dependency>
	<groupId>org.springframework</groupId>
	<artifactId>spring-jms</artifactId>
</dependency>
<dependency>
	<groupId>org.springframework</groupId>
	<artifactId>spring-context-support</artifactId>
</dependency>
 <dependency>
	<groupId>org.apache.activemq</groupId>
	<artifactId>activemq-all</artifactId>
	<version>5.11.2</version>
</dependency>

第二步：配置Activemq整合spring。配置ConnectionFactory,生产者,Destination

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
	xmlns:context="http://www.springframework.org/schema/context" xmlns:p="http://www.springframework.org/schema/p"
	xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.2.xsd
	http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.2.xsd
	http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.2.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.2.xsd
	http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.2.xsd">
	
	<!-- 真正可以产生Connection的ConnectionFactory，由对应的 JMS服务厂商提供 -->
	<bean id="targetConnectionFactory" class="org.apache.activemq.ActiveMQConnectionFactory">
		<property name="brokerURL" value="tcp://115.159.126.205:61616" />
	</bean>
	<!-- Spring用于管理真正的ConnectionFactory的ConnectionFactory -->
	<bean id="connectionFactory"
		class="org.springframework.jms.connection.SingleConnectionFactory">
		<!-- 目标ConnectionFactory对应真实的可以产生JMS Connection的ConnectionFactory -->
		<property name="targetConnectionFactory" ref="targetConnectionFactory" />
	</bean>
	<!-- 配置生产者 -->
	<!-- Spring提供的JMS工具类，它可以进行消息发送、接收等 -->
	<bean id="jmsTemplate" class="org.springframework.jms.core.JmsTemplate">
		<!-- 这个connectionFactory对应的是我们定义的Spring提供的那个ConnectionFactory对象 -->
		<property name="connectionFactory" ref="connectionFactory" />
	</bean>
	<!--这个是队列目的地，点对点的 -->
	<bean id="queueDestination" class="org.apache.activemq.command.ActiveMQQueue">
		<constructor-arg>
			<value>spring-queue</value>
		</constructor-arg>
	</bean>
	<!--这个是主题目的地，一对多的 -->
	<bean id="topicDestination" class="org.apache.activemq.command.ActiveMQTopic">
		<constructor-arg value="itemAddTopic" />
	</bean>
</beans>

第三步：代码测试

package cn.e3mall.activemq;

import javax.jms.Destination;
import javax.jms.JMSException;
import javax.jms.Message;
import javax.jms.Session;

import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import org.springframework.jms.core.JmsTemplate;
import org.springframework.jms.core.MessageCreator;

/**
 * sping 整合activeMQ
 * @author cxx
 *
 */
public class ActiveMqSpringTest {
	@Test
	public void sendMessage() throws Exception {
		//初始化spring容器
		ApplicationContext applicationContext = new ClassPathXmlApplicationContext("classpath:spring/applicationContext-activemq.xml");
		//从容器中获得JmsTemplate对象。
		JmsTemplate jmsTemplate = applicationContext.getBean(JmsTemplate.class);
		//从容器中获得一个Destination对象。
		Destination destination = (Destination) applicationContext.getBean("queueDestination");
		//发送消息
		jmsTemplate.send(destination, new MessageCreator() {
			@Override
			public Message createMessage(Session session) throws JMSException {
				return session.createTextMessage("send activemq message");
			}
		});
	}
}

1.1.1. 接收消息

e3-search-Service中接收消息。

第一步：把Activemq相关的jar包添加到工程中

第二步：创建一个MessageListener的实现类。

package cn.e3mall.activemq;

import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class MessageConsumer {

	@Test
	public void msgConsumer() throws Exception {
		//初始化spring容器
		ApplicationContext applicationContext =  new ClassPathXmlApplicationContext("classpath:spring/applicationContext-activemq.xml");
		//等待
		System.in.read();
	}
}

配置spring和Activemq整合。

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
	xmlns:context="http://www.springframework.org/schema/context" xmlns:p="http://www.springframework.org/schema/p"
	xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.2.xsd
	http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.2.xsd
	http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.2.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.2.xsd
	http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.2.xsd">
	
	<!-- 真正可以产生Connection的ConnectionFactory，由对应的 JMS服务厂商提供 -->
	<bean id="targetConnectionFactory" class="org.apache.activemq.ActiveMQConnectionFactory">
		<property name="brokerURL" value="tcp://115.159.126.205:61616" />
	</bean>
	<!-- Spring用于管理真正的ConnectionFactory的ConnectionFactory -->
	<bean id="connectionFactory"
		class="org.springframework.jms.connection.SingleConnectionFactory">
		<!-- 目标ConnectionFactory对应真实的可以产生JMS Connection的ConnectionFactory -->
		<property name="targetConnectionFactory" ref="targetConnectionFactory" />
	</bean>
	<!--这个是队列目的地，点对点的 -->
	<bean id="queueDestination" class="org.apache.activemq.command.ActiveMQQueue">
		<constructor-arg>
			<value>spring-queue</value>
		</constructor-arg>
	</bean>
	<!--这个是主题目的地，一对多的 -->
	<bean id="topicDestination" class="org.apache.activemq.command.ActiveMQTopic">
		<constructor-arg value="itemAddTopic" />
	</bean>
	<!-- 配置bean -->
	<bean id="myMessageListener" class="cn.e3mall.search.message.MyMessageListener"/>
	<!-- 消息监听容器 -->
	<bean class="org.springframework.jms.listener.DefaultMessageListenerContainer">
		<property name="connectionFactory" ref="connectionFactory" />
		<property name="destination" ref="queueDestination" />
		<property name="messageListener" ref="myMessageListener" />
	</bean>
</beans>

测试代码。

package cn.e3mall.activemq;

import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class MessageConsumer {

	@Test
	public void msgConsumer() throws Exception {
		//初始化spring容器
		ApplicationContext applicationContext =  new ClassPathXmlApplicationContext("classpath:spring/applicationContext-activemq.xml");
		//等待
		System.in.read();
	}
}

发送一个消息：

实际项目中怎么用：

描述：我们添加商品后，需要同步索引库

添加商品时，发送消息（商品id）,然后客户端接收到id后，同步到索引库中去。

<!-- 监听商品添加消息，同步索引库 -->
<bean id="itemAddMessageListener" class="cn.e3mall.search.message.ItemAddMessageListener"/>
<bean class="org.springframework.jms.listener.DefaultMessageListenerContainer">
	<property name="connectionFactory" ref="connectionFactory" />
	<property name="destination" ref="topicDestination" />
	<property name="messageListener" ref="itemAddMessageListener" />
</bean>

package cn.e3mall.search.message;

import javax.jms.Message;
import javax.jms.MessageListener;
import javax.jms.TextMessage;

import org.apache.solr.client.solrj.SolrServer;
import org.apache.solr.common.SolrInputDocument;
import org.springframework.beans.factory.annotation.Autowired;

import cn.e3mall.common.pojo.SearchItem;
import cn.e3mall.search.mapper.ItemMapper;

/**
 * 监听商品添加消息，接收消息后，将对应的商品信息同步到索引库
 * <p>Title: ItemAddMessageListener</p>
 * <p>Description: </p>
 * <p>Company: www.itcast.cn</p> 
 * @version 1.0
 */
public class ItemAddMessageListener implements MessageListener {
	
	@Autowired
	private ItemMapper itemMapper;
	@Autowired
	private SolrServer solrServer;

	@Override
	public void onMessage(Message message) {
		try {
			//从消息中取商品id
			TextMessage textMessage = (TextMessage) message;
			String text = textMessage.getText();
			Long itemId = new Long(text);
			//等待事务提交
			Thread.sleep(1000);
			//根据商品id查询商品信息
			SearchItem searchItem = itemMapper.getItemById(itemId);
			//创建一个文档对象
			SolrInputDocument document = new SolrInputDocument();
			//向文档对象中添加域
			document.addField("id", searchItem.getId());
			document.addField("item_title", searchItem.getTitle());
			document.addField("item_sell_point", searchItem.getSell_point());
			document.addField("item_price", searchItem.getPrice());
			document.addField("item_image", searchItem.getImage());
			document.addField("item_category_name", searchItem.getCategory_name());
			//把文档写入索引库
			solrServer.add(document);
			//提交
			solrServer.commit();
		} catch (Exception e) {
			e.printStackTrace();
		}

	}
}

@Autowired
private JmsTemplate jmsTemplate;
@Resource
private Destination topicDestination;

@Override
	public E3Result addItem(TbItem item, String desc) {
		//生成商品id
		final long itemId = IDUtils.genItemId();
		//补全item的属性
		item.setId(itemId);
		//1-正常，2-下架，3-删除
		item.setStatus((byte) 1);
		item.setCreated(new Date());
		item.setUpdated(new Date());
		//向商品表插入数据
		itemMapper.insert(item);
		//创建一个商品描述表对应的pojo对象。
		TbItemDesc itemDesc = new TbItemDesc();
		//补全属性
		itemDesc.setItemId(itemId);
		itemDesc.setItemDesc(desc);
		itemDesc.setCreated(new Date());
		itemDesc.setUpdated(new Date());
		//向商品描述表插入数据
		itemDescMapper.insert(itemDesc);
		//发送商品添加消息
		jmsTemplate.send(topicDestination, new MessageCreator() {
			
			@Override
			public Message createMessage(Session session) throws JMSException {
				TextMessage textMessage = session.createTextMessage(itemId + "");
				return textMessage;
			}
		});
		
		//返回成功
		return E3Result.ok();
	}

注意：可能会出现空指针异常