带有ActiveMQ和Maven的JMS Sender应用程序

我们已经看到了如何使用ActiveMQ和Maven创建JMS Receiver应用程序。让我们看看我们如何类似地创建JMS Sender应用程序 。

web.xml与创建接收器应用程序时使用的相同：

<web-app xmlns="http://java.sun.com/xml/ns/javaee"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"version="3.0"><context-param><param-name>contextConfigLocation</param-name><param-value>/WEB-INF/jmsContext.xml</param-value></context-param><listener><listener-class>org.springframework.web.context.ContextLoaderListener</listener-class></listener>
</web-app>

jmsContext.xml会更改为以下内容：

<?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:jms="http://www.springframework.org/schema/jms" xmlns:p="http://www.springframework.org/schema/p"xsi:schemaLocation="http://www.springframework.org/schema/beans   http://www.springframework.org/schema/beans/spring-beans-3.0.xsd  http://www.springframework.org/schema/context  http://www.springframework.org/schema/context/spring-context-3.0.xsd  http://www.springframework.org/schema/jms  http://www.springframework.org/schema/jms/spring-jms-3.0.xsd"><bean id="connectionFactory" class="org.apache.activemq.spring.ActiveMQConnectionFactory"><property name="brokerURL" value="tcp://localhost:61616" /></bean><!-- <jms:listener-container container-type="default"connection-factory="connectionFactory" acknowledge="auto"><jms:listener destination="testQueue" ref="simpleMessageListener"method="onMessage" /></jms:listener-container> --><!-- To send JMS message --><bean id="jmsTemplate" class="org.springframework.jms.core.JmsTemplate"><property name="connectionFactory" ref="connectionFactory" /><property name="defaultDestinationName" value="testQueue"/></bean><bean id="simpleMessageSender" class="com.jcombat.sender.SimpleMessageSender"><property name="jmsTemplate" ref="jmsTemplate" /></bean>
</beans>

请注意，我们为jmsTemplate和messageSender类添加了两个新bean，它们将使用jmsTemplate实例将消息发送到目标队列。

现在让我们创建一个消息发送者类SimpleMessageSender.java ，它实际上将发送消息：

package com.jcombat.sender;import javax.jms.JMSException;
import javax.jms.Message;
import javax.jms.Session;import org.springframework.jms.core.JmsTemplate;
import org.springframework.jms.core.MessageCreator;public class SimpleMessageSender {private JmsTemplate jmsTemplate;public void setJmsTemplate(JmsTemplate jmsTemplate) {this.jmsTemplate = jmsTemplate;}public void sendMessage(final String message){  jmsTemplate.send(new MessageCreator(){  @Override  public Message createMessage(Session session) throws JMSException {  return session.createTextMessage(message);  }});  }  
}

快完成了现在，让我们创建客户端类TestClient.java ，它将从jmsContext获取simpleMessageSender bean并通过调用它的sendMessage方法发送一些消息字符串，从而将消息拖放到已配置的队列testQueue中 （如上面显示的jmsContext文件内容中突出显示的那样）。

package com.jcombat.client;import org.springframework.context.ApplicationContext;
import org.springframework.context.support.FileSystemXmlApplicationContext;import com.jcombat.sender.SimpleMessageSender;public class TestClient {@SuppressWarnings("resource")public static void main(String[] args) throws Exception {ApplicationContext jmsContext = null;jmsContext = new FileSystemXmlApplicationContext("path/to/jmsContext.xml");SimpleMessageSender messageSender = (SimpleMessageSender) jmsContext.getBean("simpleMessageSender");// Create a session within the connection.messageSender.sendMessage("hello");}
}

现在，将TestClient类作为Java应用程序运行。