当前位置:编程学习 > JAVA >>

Activemq和Lingo实现JMS和异步调用

jms是大家在项目中经常用到的技术,而activemq又是开源的jms产品中比较优秀的。在应用JMS处理相关业务时,大家都是构造消息,然后发送到队列,最后用message易做图监听到消息,对消息进行分析处理。在这个过程中,有两步是比较麻烦和重复的,那就是构造消息和拆解消息。并且这样与面向对象的思想很是违背。如果这样做显然是面向消息数据的,而不是面向对象的。基于以上原因,我向大家介绍一个我在项目中经过实践的开源框架:lingo.

  

  lingo在JMS中起的主要作用就是对消息的封装,它让你可以不必关心消息的构造和拆解,而只需关心你本身的业务逻辑。我将举一个例子,分别用activemq直接实现和用lingo实现。在这个例子中我用到了spring framework.

  

  =================================Hello.java===========================

  

  import java.io.Serializable;

  

  /**Hello.java用来传递JAVA对象

  * Author: cjp

  * Date: 2005-11-8

  * Time: 22:24:02

  */

  public class Hello implements Serializable {

  private String id;

  private Hello hello;

  private PointList pointList;

  public String getId() {

  return id;

  }

  

  public void setId(String id) {

  this.id = id;

  }

  

  public Hello getHello() {

  return hello;

  }

  

  public void setHello(Hello hello) {

  this.hello = hello;

  }

  }

  

  =========================SpringTest .java========================

  

  import org.springframework.jms.core.JmsTemplate;

  import org.springframework.jms.core.MessageCreator;

  import org.springframework.test.AbstractDependencyInjectionSpringContextTests;

  

  import javax.jms.*;

  

  /**

  

  *发送JMS消息

  

  */

  public class SpringTest extends AbstractDependencyInjectionSpringContextTests

  {

  protected String[] getConfigLocations()

  {

  return new String[]{"file:D:\wosame\test\com\wosame\room\jms\jms.xml"};

  }

  

  public void testSendMessage() throws Exception

  {

  JmsTemplate jmsTemplate = (JmsTemplate) applicationContext.getBean("jmsTemplate");

  jmsTemplate.send(new MessageCreator()

  {

  public Message createMessage(Session session) throws JMSException

  {

  ObjectMessage message=session.createObjectMessage();

  Hello hello=new Hello();

  hello.setId("test");

  message.setObject(hello);

  return message;

  }

  });

  }

  }

  

  ================================HelloMDP .java==================================

  

  /**

  

  处理JMS消息

  

  */

  

  import org.apache.commons.logging.Log;

  import org.apache.commons.logging.LogFactory;

  import javax.jms.*;

  

  public class HelloMDP implements MessageListener

  {

  protected Log log = LogFactory.getLog(HelloMDP.class);

  

  public void onMessage(Message message)

  {

  try

  {

  ObjectMessage objMessage = (ObjectMessage) message;

  Hello hello= (Hello) objMessage.getObject();

  System.out.println("hello.getId() = " + hello.getId());

  } catch (JMSException e)

  {

  log.error("Parse failed", e);

  }

  }

  }

  

  ================================jms.xml==================================

  

  

    "http://www.springframework.org/dtd/spring-beans.dtd">

  

  

补充:软件开发 , Java ,
CopyRight © 2022 站长资源库 编程知识问答 zzzyk.com All Rights Reserved
部分文章来自网络,