通过spring开发ActiveMQ简单应用

使用spring的支持类开发JMS程序可以简化代码，确保开发质量。以下是使用ActiveMQ作为JMS实现的示例。

首先需要确保如下类库，这里使用maven的pom：

<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-jms</artifactId>
    <version>2.5.6</version>
</dependency>
<dependency>
    <groupId>org.apache.xbean</groupId>
    <artifactId>xbean-spring</artifactId>
    <version>3.5</version>
</dependency>
<dependency>
    <groupId>org.apache.activemq</groupId>
    <artifactId>activemq-core</artifactId>
    <version>5.2.0</version>
</dependency>


编写消息生产者的代码：

@Component
public class MyMessageProducer {
    @Resource(name = "Queue")
    private Destination destination;

    @Autowired
    private JmsTemplate jmsTemplate;

    public void sendMessage(final String message) {
        this.jmsTemplate.send(this.destination, new MessageCreator() {
            @Override
            public Message createMessage(Session session) throws JMSException {
                TextMessage textMessage = session.createTextMessage();
                textMessage.setText(message);
                return textMessage;
            }
        });
    }
}

有关生产者部分spring的配置文件内容：

<?xml version="1.0" encoding="UTF-8"?>

<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:amq="http://activemq.apache.org/schema/core" xmlns:lang="http://www.springframework.org/schema/lang"
    xmlns:context="http://www.springframework.org/schema/context"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:aop="http://www.springframework.org/schema/aop"
    xmlns:tx="http://www.springframework.org/schema/tx" xmlns:util="http://www.springframework.org/schema/util"
    xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
     http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.5.xsd
     http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-2.5.xsd
     http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsd
     http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-2.5.xsd
     http://www.springframework.org/schema/lang http://www.springframework.org/schema/lang/spring-lang-2.5.xsd
     http://activemq.apache.org/schema/core http://activemq.apache.org/schema/core/activemq-core.xsd">

    <context:annotation-config />
    <context:component-scan base-package="activemq.demo.spring" />

    <bean id="jmsFactory" class="org.apache.activemq.ActiveMQConnectionFactory">
        <property name="brokerURL">
            <value>tcp://localhost:61616</value>
        </property>
    </bean>

    <bean id="myJmsTemplate" class="org.springframework.jms.core.JmsTemplate">
        <property name="connectionFactory" ref="jmsFactory" />
    </bean>
    <amq:queue name="Queue" physicalName="example.D" />

这样，执行发送代码，在activemq的admin界面中可以观察到发送成功的消息。

异步接收的代码：

public class MyMessageConsumer implements MessageListener {

    @Override
    public void onMessage(Message message) {
        TextMessage textMessage = (TextMessage) message;
        try {
            System.out.println(">>>>>>>"+textMessage.getText());
//            throw new RuntimeException(">>>>>>>>>>test error");
        } catch (JMSException e) {
            throw new RuntimeException(e);
        }
    }

}

有关异步接收代码的spring配置：

     <bean id="myMessageConsumer" class="activemq.demo.spring.MyMessageConsumer" />
    <bean id="jmsContainer"
        class="org.springframework.jms.listener.DefaultMessageListenerContainer">
        <property name="connectionFactory" ref="jmsFactory" />
        <property name="destination" ref="Queue" />
        <property name="messageListener" ref="myMessageConsumer" />
        <property name="sessionTransacted" value="true"/>
    </bean>


这样，就实现了基于spring和activemq的JMS的同步发送和异步提交。如果将MyMessageConsumer的抛出异常部分取消注释，则接收信息后，spring捕获到该异常并自动回滚事务。通过activemq的admin界面会监控到消息依然留在队列中。