spring(Blazeds)-flex中实现jms的持久化(durable)订阅

这几天用spring-flex做一个能够接收离线消息的Flex应用，在网上找了很多资料，但是都没提到如何实现离线消息，最后在blazeds的开发文档里找到了如何让blazeds message service实现持久化订阅JMS消息。但是还是找不到在spring-flex里如何配置，最后只能两个并用了，下面把过程贴上来给大家看看！

环境: 

JMS服务器: activemq5.2
spring-flex 1.0
blazeds

1、首先是在tomcat中配置JMS服务器信息:
在应用根目录下/META-INF/context.xml(没有可以自己创建)中增加如下内容:

 < Context   antiJARLocking = "true" >
      < Resource
          name = "jms/flex/ActiveMqConnectionFactory"
          auth = "Container"
          type = "org.apache.activemq.ActiveMQConnectionFactory"
          description = "JMS Connection Factory"
          factory = "org.apache.activemq.jndi.JNDIReferenceFactory"
          brokerURL = "tcp://localhost:61616"
          brokerName = "LocalActiveMQBroker"
          useEmbeddedBroker = "false" />

      < Resource   name = "jms/JMSChat"
          auth = "Container"
          type = "org.apache.activemq.command.ActiveMQTopic"
          factory = "org.apache.activemq.jndi.JNDIReferenceFactory"
          physicalName = "stockQuoteTopic" />
 </ Context >

2、在web.xml文件中增加如下内容:

 < resource-ref >
          < description > Connection Factory </ description >
          < res-ref-name > jms/flex/ActiveMqConnectionFactory </ res-ref-name >
          < res-type > javax.jms.QueueConnectionFactory </ res-type >
          < res-auth > Container </ res-auth >
      </ resource-ref >

      < resource-env-ref >
          < resource-env-ref-name > jms/JMSChat </ resource-env-ref-name >
          < resource-env-ref-type > javax.jms.Topic </ resource-env-ref-type >
      </ resource-env-ref >

3、接下来是配置Blazeds的message service

 <? xml   version = "1.0"   encoding = "UTF-8" ?>
 < service   id = "message-service"   class = "flex.messaging.services.MessageService" >
      < adapters >
          < adapter-definition   id = "actionscript"   class = "flex.messaging.services.messaging.adapters.ActionScriptAdapter"   default = "true"   />
          < adapter-definition   id = "jms"   class = "flex.messaging.services.messaging.adapters.JMSAdapter" />
      </ adapters >
      < destination   id = "JMSChat" >
          < properties >
  <!--这里的配置是最关键的，只有durable 属性设计为true才能实现持久化订阅-->
              < server >
                 < durable > true</ durable >
             </ server >
              < jms >
                  < destination-type > Topic </ destination-type >
                  < message-type > javax.jms.TextMessage </ message-type >
                  < connection-factory > java:comp/env/jms/flex/ActiveMqConnectionFactory </ connection-factory >
                  < destination-jndi-name > java:comp/env/jms/JMSChat </ destination-jndi-name >
                  < delivery-mode > PERSISTENT </ delivery-mode >
                  < message-priority > DEFAULT_PRIORITY </ message-priority >
                  < acknowledge-mode > AUTO_ACKNOWLEDGE </ acknowledge-mode >
                  < initial-context-environment >
                      < property >
                          < name > Context.INITIAL_CONTEXT_FACTORY </ name >
                          < value > org.apache.activemq.jndi.ActiveMQInitialContextFactory </ value >
                      </ property >
                      < property >
                          < name > Context.PROVIDER_URL </ name >
                          < value > tcp://localhost:61616 </ value >
                      </ property >
                  </ initial-context-environment >
              </ jms >
          </ properties >
          < channels >
              < channel   ref = "my-polling-amf" />
              < channel   ref = "my-streaming-amf" />
          </ channels >
          < adapter   ref = "jms" />
      </ destination >

 </ service >

 4、前端Flex聊天室代码

 <? xml   version = "1.0"   encoding = "utf-8" ?>
 < mx:Application   creationComplete = "init()"    xmlns:mx = "http://www.adobe.com/2006/mxml"   fontSize = "12" >
      < mx:Script >
          <![CDATA[
             import mx.controls.Alert;
             import mx.messaging.messages.AsyncMessage;
             import mx.messaging.messages.IMessage;
             import flash.external.ExternalInterface;

             //以下代码向浏览器反向插入js方法监听浏览器关闭事件
             private function init():void{
                 ExternalInterface.call(FUNCTION_USEREXIT);
                 ExternalInterface.addCallback("checkExit",checkExit);
             }
             //关闭浏览器时退出
             public function checkExit():String {
                       logout();
                       var userExitStr:String = "你已经离开聊天室，下次再见！";
                       return userExitStr;
             }

             //监听浏览器关闭事件函数
             private static var FUNCTION_USEREXIT:String =
                 "document.insertScript = function () " +
                 "{ " +
                     "window.onbeforeunload = function() " +
                     "{ " +
                         "var flexObj = JMSChat.checkExit(); " +//JMSChat是swf在html中object的id
                         "if(flexObj != \"\") " +
                         "{ " +
                             "return flexObj; " +
                         "}else{ " +
                             "return; " +
                         "} " +
                     "} " +
                 "} ";


             private function login():void{
                 //订阅主题的时候带上一个唯一ID，jms服务器会记录ID,在下次登录时发送离线消息
                 if(userName.text==""){
                     Alert.show("请输入您的用户名");
                 }else{
                     consumer.subscribe(userName.text);
                     userName.enabled=false;
                 }
             }

             private function logout():void{
                 //退订消息的时候，true表示在jms服务器端记录离线消息，flase的时候将不记录离线消息
                 consumer.unsubscribe(true);
                 userName.text="";
                 userName.enabled=true;
             }

             private function send():void
             {
                 var message:IMessage = new AsyncMessage();
                 if(userName.enabled){
                     Alert.show("您还未登录！");
                 }else{
                     message.body=userName.text+" : "+ msg.text;
                     producer.send(message);
                     msg.text = "";
                 }
             }

             private function messageHandler(message:IMessage):void
             {
                 chatRoom.text += message.body+ "\n";
             }
         ]]>
      </ mx:Script >
      < mx:ChannelSet   id = "cs" >
          < mx:AMFChannel   url = "http://192.168.0.109:8080/FlexJms/messagebroker/amflongpolling" />
          < mx:AMFChannel   url = "http://192.168.0.109:8080/FlexJms/messagebroker/amfpolling" />
      </ mx:ChannelSet >
      < mx:Producer   id = "producer"   destination = "JMSChat"   channelSet = "{cs}" />
      < mx:Consumer   id = "consumer"    destination = "JMSChat"   channelSet = "{cs}"
           message = "messageHandler(event.message)" />

      < mx:Panel   title = "聊天室"   width = "100%"   height = "100%" >
          < mx:TextArea   id = "chatRoom"   width = "100%"   height = "100%" />
          < mx:ControlBar >
               < mx:Label   text = "用户名" />
               < mx:TextInput   id = "userName"   />
               < mx:TextInput   id = "msg"   width = "100%"   enter = "send()" />
               < mx:Button   label = "发送"   click = "send()" />
               < mx:Button   label = "登陆"   click = "login()" />
               < mx:Button   label = "退出"   click = "logout()" />
               < mx:Button   label = "清屏"   click = "chatRoom.text=''" />
          </ mx:ControlBar >
      </ mx:Panel >

 </ mx:Application >

 以下是截图：

 

这个时候我们“退出test”, 然后用test2发送多条信息！

 

过两分钟后我们再用test登录:

 

这就简单的实现了离线消息的发送。下图是activemq控制台上持久消息订阅用户信息图：
可通过http://localhost:8161/admin 查看.

 

这里记录了JMS信息的持久订阅者及等发送信息等内容。