JBOSS建立JMS应用实例

JBOSS建立JMS应用实例

 

环境配置说明

Jboss 4.2.3

Java ee 5

MySql5.0

安装jdk,我的目录为C:/Sun/SDK

安装jboss.我的目录为D:/jboss 4.2.3

安装mysql

配置环境变量JBOSS_HOME D:/jboss 4.2.3

配置环境变量 JAVA_HOME C:/Sun/SDK/jdk

 

JBOSS的JMS配置

由于没有用到集群所以用JBOSS的default应用即可。

1、  配置MySQL数据库的JNDI

将MySQL数据库驱动拷到default/lib下JBOSS没有自带MySQL的数据库驱动。

在D:/jboss 4.2.3 /docs/examples/jca 下的文件夹下面，有很多不同数据库引用的数据源定义模板。将其中的 mysql-ds.xml 文件Copy到你使用的服务器下，如 D:/ jboss4.2.3/server/default/deploy。

修改 mysql-ds.xml 文件的内容，使之能通过JDBC正确访问你的MySQL数据库，如下：

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

<datasources>

<local-tx-datasource>

    <jndi-name>MySqlDS</jndi-name>

    <connection-url> jdbc:mysql://localhost:3306/test</connection-url>

    <driver-class>com.mysql.jdbc.Driver</driver-class>

    <user-name>root</user-name>

    <password>rootpassword</password>

<exception-sorter-class-name>org.jboss.resource.adapter.jdbc.vendor.MySQLExceptionSorter</exception-sorter-class-name>

    <metadata>

       <type-mapping>mySQL</type-mapping>

    </metadata>

</local-tx-datasource>

</datasources>

 

这里，定义了一个名为MySqlDS的数据源，其参数包括JDBC的URL，驱动类名，用户名及密码等。

通过配置后就可以通过JNDI名java:MySqlDS 访问到配置的Mysql数据库。

 

2、  配置JBOSS的JMS环境

将D:/jboss 4.2.3 /docs/examples/jms下的mysql-jdbc2-service.xml拷到D:/jboss4.2.3/server/default/deploy/jms 下。并将数据库DataSourceBinding 改成name=MySqlDS连到你的MySql数据库

 

将D:/jboss 4.2.3 /server/default/deploy/jms 目录下的hsqldb-jdbc-state-service文件改名为mysql-jdbc-state-service.xml 并将<depends optional-attribute-name="ConnectionManager">jboss.jca:service=DataSourceBinding,name=MySqlDS</depends>

该成name=MySqlDS用于连接你的MySql的数据库。

启动JBOSS后在控制台将会看到类似如下的信息就表示默认的JMS的jndi名已经绑定了。JMS的配置成功了。

10:14:42,343 INFO  [ConnectionFactoryBindingService] Bound ConnectionManager 'jboss.jca:service=DataSourceBinding,name=DefaultDS' to JNDI name 'java:DefaultDS'

10:14:42,984 INFO  [ConnectionFactoryBindingService] Bound ConnectionManager 'jboss.jca:service=ConnectionFactoryBinding,name=JmsXA' to JNDI name 'java:JmsXA'

10:14:43,171 INFO  [ConnectionFactoryBindingService] Bound ConnectionManager 'jboss.jca:service=DataSourceBinding,name=MySqlDS' to JNDI name 'java:MySqlDS'

10:14:43,968 INFO  [A] Bound to JNDI name: queue/A

10:14:44,000 INFO  [B] Bound to JNDI name: queue/B

10:14:44,000 INFO  [C] Bound to JNDI name: queue/C

10:14:44,000 INFO  [D] Bound to JNDI name: queue/D

10:14:44,015 INFO  [ex] Bound to JNDI name: queue/ex

10:14:44,046 INFO  [testTopic] Bound to JNDI name: topic/testTopic

10:14:44,046 INFO  [securedTopic] Bound to JNDI name: topic/securedTopic

10:14:44,062 INFO  [testDurableTopic] Bound to JNDI name: topic/testDurableTopic

10:14:44,062 INFO  [testQueue] Bound to JNDI name: queue/testQueue

10:14:44,140 INFO  [myQueue] Bound to JNDI name: queue/myQueue

10:14:44,203 INFO  [UILServerILService] JBossMQ UIL service available at : /127.0.0.1:8093

 

    连接到MySQL数据库也可以看到默认的建了几个以jms_开头的数据表。用语保存jms的用户信息和持久化消息。

 

JBOSS的JMS实例

JBOSS的JMS环境建立好了以后我们就可以写几个发送接受JMS的程序来验证一下。

当你发送一个消息，你不能直接发送到对此消息感兴趣的接受者。而是你发送到一个目的地。对此消息感兴趣的接受者必须连接到目的地，得到此消息或在目的地设置订阅。

在JMS中有两种域：topics 和queues 。

*一个消息发送到一个topics ，可以有多个客户端。用topic发布允许一对多，或多对多通讯通道。消息的产生者被叫做publisher, 消息接受者叫做subscriber。

*queue 是另外一种方式，仅仅允许一个消息传送给一个客户。一个发送者将消息放在消息队列中，接受者从队列中抽取并得到消息，消息就会在队列中消失。第一个接受者抽取并得到消息后，其他人就不能在得到它。

为了能发送和接收消息，必须得到一个JMS连接。该连接是使用JMS Provider得到连接的，在得到连接之后，建立一个会话(Session)。然后再建立publisher/sender 来发送消息或subscriber/receiver来接收消息。

运行时，如果使用topic 那么publisher 或subscriber 通过一个topic来关联，如果使用queue ，则sender 或receiver通过queue来关联起来。

通常，在JMS框架中运转的方法如下：

(1) 得到一个JNDI初始化上下文(Context)；

(2) 根据上下文来查找一个连接工厂TopicConnectFactory/ QueueConnectionFactory (有两种连接工厂，根据是topic/queue来使用相应的类型)；

(3) 从连接工厂得到一个连接(Connect 有两种[TopicConnection/ QueueConnection]);

(4) 通过连接来建立一个会话(Session);

(5) 查找目的地(Topic/ Queue);

(6) 根据会话以及目的地来建立消息制造者(TopicPublisher/QueueSender)和消费者(TopicSubscriber/ QueueReceiver).

为了得到一个连接和得到一个目的地（用来关联publisher/sender 或subscriber/receiver），必须用provider-specific参数。

 

在D:/jboss 4.2.3 /server/default/deploy/jms下的jbossmq-destinations-service.xml是在配置JMS目的地的xml文件。在文件中已经存在几个缺省的目的地，所以你比较容易明白怎样增加到文件中

1、  topics例子

package com.msg;

import javax.naming.Context;

import javax.naming.InitialContext;

import javax.naming.NamingException;

import javax.jms.TopicConnectionFactory;

import javax.jms.TopicConnection;

import javax.jms.TopicSession;

import javax.jms.TopicPublisher;

import javax.jms.Topic;

import javax.jms.TextMessage;

import javax.jms.Session;

import javax.jms.JMSException;

import java.util.Hashtable;

 

public class HelloPublisher {

 

       TopicConnection topicConnection;

       TopicSession topicSession;

       TopicPublisher topicPublisher;

       Topic topic;

 

       public HelloPublisher(String factoryJNDI, String topicJNDI)

                     throws JMSException, NamingException {

              Hashtable props = new Hashtable();

              props.put(Context.INITIAL_CONTEXT_FACTORY,

                            "org.jnp.interfaces.NamingContextFactory");

              props.put(Context.PROVIDER_URL, "localhost:1099");

              props.put("java.naming.rmi.security.manager", "yes");

              props.put(Context.URL_PKG_PREFIXES, "org.jboss.naming");

              Context context = new InitialContext(props);

              TopicConnectionFactory topicFactory = (TopicConnectionFactory) context

                            .lookup(factoryJNDI);

              topicConnection = topicFactory.createTopicConnection();

              topicSession = topicConnection.createTopicSession(false,

                            Session.AUTO_ACKNOWLEDGE);

 

              topic = (Topic) context.lookup(topicJNDI);

 

              topicPublisher = topicSession.createPublisher(topic);

 

       }

 

       public void publish(String msg) throws JMSException {

 

              TextMessage message = topicSession.createTextMessage();

              message.setText(msg);

              topicPublisher.publish(topic, message);

       }

 

       public void close() throws JMSException {

              topicSession.close();

              topicConnection.close();

       }

 

       public static void main(String[] args) {

              try {

                     HelloPublisher publisher = new HelloPublisher("ConnectionFactory",

                                   "topic/testTopic");

                     for (int i = 1; i < 11; i++) {

                            String msg = "Hello World no. " + i;

                            System.out.println("Publishing message: " + msg);

                            publisher.publish(msg);

                     }

                     publisher.close();

              } catch (Exception ex) {

                     System.err

                                   .println("An exception occurred while testing HelloPublisher25: "

                                                 + ex);

                     ex.printStackTrace();

              }

       }

}

 

package com.msg;

 

import javax.naming.Context;

import javax.naming.InitialContext;

import javax.naming.NamingException;

 

import javax.jms.TopicConnectionFactory;

import javax.jms.TopicConnection;

import javax.jms.TopicSession;

import javax.jms.TopicSubscriber;

import javax.jms.Topic;

import javax.jms.Message;

import javax.jms.TextMessage;

import javax.jms.Session;

import javax.jms.MessageListener;

import javax.jms.JMSException;

 

public class HelloSubscriber implements MessageListener {

       TopicConnection topicConnection;

       TopicSession topicSession;

       TopicSubscriber topicSubscriber;

       Topic topic;

 

       public HelloSubscriber(String factoryJNDI, String topicJNDI)

                     throws JMSException, NamingException {

              Context context = new InitialContext();

              TopicConnectionFactory topicFactory = (TopicConnectionFactory) context

                            .lookup(factoryJNDI);

              topicConnection = topicFactory.createTopicConnection();

              topicSession = topicConnection.createTopicSession(false,

                            Session.AUTO_ACKNOWLEDGE);

              topic = (Topic) context.lookup(topicJNDI);

              topicSubscriber = topicSession.createSubscriber(topic);

              topicSubscriber.setMessageListener(this);

              System.out.println("HelloSubscriber subscribed to topic: " + topicJNDI);

              topicConnection.start();

       }

 

       public void onMessage(Message m) {

              try {

                     String msg = ((TextMessage) m).getText();

                     System.out.println("HelloSubscriber got message: " + msg);

              } catch (JMSException ex) {

                     System.err.println("Could not get text message: " + ex);

                     ex.printStackTrace();

              }

       }

 

       public void close() throws JMSException {

              topicSession.close();

              topicConnection.close();

       }

 

       public static void main(String[] args) {

              try {

                     HelloSubscriber subscriber = new HelloSubscriber(

                                   "TopicConnectionFactory", "topic/testTopic");

              } catch (Exception ex) {

                     System.err

                                   .println("An exception occurred while testing HelloSubscriber: "

                                                 + ex);

                     ex.printStackTrace();

              }

       }

}

 

2、  queues 例子

package com.msg;

 

import javax.naming.Context;

import javax.naming.InitialContext;

import javax.naming.NamingException;

import javax.jms.QueueConnectionFactory;

import javax.jms.QueueConnection;

import javax.jms.QueueSession;

import javax.jms.QueueSender;

import javax.jms.Queue;

import javax.jms.TextMessage;

import javax.jms.Session;

import javax.jms.JMSException;

 

import java.util.Hashtable;

 

public class HelloQueue {

    QueueConnection queueConnection;

    QueueSession queueSession;

    QueueSender queueSender;

    Queue queue;

 

    public HelloQueue(String factoryJNDI, String topicJNDI)

                  throws JMSException, NamingException {

           Hashtable props = new Hashtable();

           props.put(Context.INITIAL_CONTEXT_FACTORY,

                         "org.jnp.interfaces.NamingContextFactory");

           props.put(Context.PROVIDER_URL, "localhost:1099");

           props.put("java.naming.rmi.security.manager", "yes");

           props.put(Context.URL_PKG_PREFIXES, "org.jboss.naming");

           Context context = new InitialContext(props);

           QueueConnectionFactory queueFactory = (QueueConnectionFactory) context

                         .lookup(factoryJNDI);

           queueConnection = queueFactory.createQueueConnection();

           queueSession = queueConnection.createQueueSession(false,

                         Session.AUTO_ACKNOWLEDGE);

 

           queue = (Queue) context.lookup(topicJNDI);

 

           queueSender = queueSession.createSender(queue);

 

    }

 

    public void send(String msg) throws JMSException {

           TextMessage message = queueSession.createTextMessage();

           message.setText(msg);

           queueSender.send(queue, message);

    }

 

    public void close() throws JMSException {

           queueSession.close();

           queueConnection.close();

    }

 

    public static void main(String[] args) {

           try {

                  HelloPublisher publisher = new HelloPublisher("ConnectionFactory",

                                "topic/testTopic");

                  for (int i = 1; i < 11; i++) {

                         String msg = "Hello World no. " + i;

                         System.out.println("Publishing message: " + msg);

                         publisher.publish(msg);

                  }

                  publisher.close();

           } catch (Exception ex) {

                  System.err

                                .println("An exception occurred while testing HelloPublisher25: "

                                              + ex);

                  ex.printStackTrace();

           }

    }

}

package com.msg;

 

import java.util.Hashtable;

 

import javax.jms.JMSException;

import javax.jms.Message;

import javax.jms.MessageListener;

import javax.jms.Session;

import javax.jms.TextMessage;

import javax.jms.Queue;

import javax.jms.QueueConnection;

import javax.jms.QueueConnectionFactory;

import javax.jms.QueueSession;

import javax.jms.QueueReceiver;

import javax.naming.Context;

import javax.naming.InitialContext;

import javax.naming.NamingException;

 

public class HelloReceQueue implements MessageListener {

    QueueConnection queueConnection;

    QueueSession queueSession;

    QueueReceiver queueReceiver;

    Queue queue;

    public HelloReceQueue(String factoryJNDI, String topicJNDI)

    throws JMSException, NamingException

    {

           Context context = new InitialContext();

           QueueConnectionFactory queueFactory =

           (QueueConnectionFactory)context.lookup(factoryJNDI);

           queueConnection = queueFactory.createQueueConnection();

           queueSession = queueConnection.createQueueSession(false, Session.AUTO_ACKNOWLEDGE);

           queue = (Queue)context.lookup(topicJNDI);

   

           queueReceiver = queueSession.createReceiver(queue);

           queueReceiver.setMessageListener(this);

           System.out.println(

           "HelloReceQueue receiver to queue: " + topicJNDI);

           queueConnection.start();

    }

    public void onMessage(Message m) {

    try {

    String msg = ((TextMessage)m).getText();

    System.out.println("HelloReceQueue got message: " + msg);

    } catch(JMSException ex) {

    System.err.println("Could not get text message: " + ex);

    ex.printStackTrace();

    }

    }

    public void close() throws JMSException {

           queueSession.close();

           queueConnection.close();

    }

}

 

我们通过一个jsp页面建立一个web应用来发送接受消息观察message的发送接受情况。

sendmsg.jsp

<%@ page language="java" import="java.util.*" pageEncoding="gb2312"%>

<%@ page import="com.msg.*" %>

<%

String path = request.getContextPath();

String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";

HelloPublisher sendmsgBean=new HelloPublisher("ConnectionFactory", "topic/testTopic");

 

String msg=request.getParameter("msg")==null?"":request.getParameter("msg");

String flag=request.getParameter("msgflag")==null?"1":request.getParameter("msgflag");

 

if(!"".equals(msg)&&"1".equals(flag))

{

   sendmsgBean.publish(msg);

}

if("2".equals(flag))

{

   out.println("is run HelloSubscriber");

   HelloSubscriber subscriber=new HelloSubscriber("ConnectionFactory", "topic/testTopic");

}

if("3".equals(flag)&&!"".equals(msg))

{

   HelloQueue queueBean=new HelloQueue("ConnectionFactory", "queue/myQueue");

   queueBean.send(msg);

}

if("4".equals(flag))

{

   HelloReceQueue receQueueBean=new HelloReceQueue("ConnectionFactory", "queue/myQueue");

}

out.println(flag);

%>

 

<!DOCTYPE HTML PUBLIC "-//W 3C //DTD HTML 4.01 Transitional//EN">

<html>

  <head>

    <base href="<%=basePath%>">

   

    <title>发消息</title>

   

       <meta http-equiv="pragma" content="no-cache">

       <meta http-equiv="cache-control" content="no-cache">

       <meta http-equiv="expires" content="0">   

       <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">

       <meta http-equiv="description" content="This is my page">

       <!--

       <link rel="stylesheet" type="text/css" href="styles.css">

       -->

    <script>

    function submitMsg(flag)

    {

       if(flag==1)

       {

          document.getElementById("msgflag").value="1";

       }

       else if(flag==2)

       {

          document.getElementById("msgflag").value="2";

       }

       else if(flag==3)

       {

          document.getElementById("msgflag").value="3";

       }

       else

       {

          document.getElementById("msgflag").value="4";

       }

       document.msgForm.submit();

    }

    </script>

  </head>

 

  <body>

   <form name="msgForm" action="sendmsg.jsp" method="POST">

     <input type="text" name="msg">

     <input type="hidden" name="msgflag" value="1">

     <input type="button" name="btn1" value="PublicTopic" onclick=submitMsg(1);>

     <input type="button" name="btn2" value="Subscriber" onclick=submitMsg(2);>

     <input type="button" name="btn3" value="sendQueue" onclick=submitMsg(3);>

     <input type="button" name="btn4" value="receiveQueue" onclick=submitMsg(4);>

    

   </form>

  </body>

</html>

 

为了更好的观察消息的发送接受情况。可以下载HermesJMS来观察消息发送接受的情况。

具体可以到

https://sourceforge.net/project/showfiles.php?group_id=61713&package_id=58149&release_id=616588 下载。

HermesJMS与JBOSS的jms配置见

http://www.hermesjms.com/demos/jboss_config.html

 

以上实例原代码见

http://download.csdn.net/source/648609