java服务器向flex客户端一对一推送数据

 结合其他前辈所编写的采用BlazeDS的发布-订阅机制实现的一对多的实现,在此基础上采用flex的消息服务的选择过滤功能实现一对一.(其中Tick文件和TickCacheServlet主要部分和flex_blazeds.mxml部分代码为网上前辈所作)

Tick.java

package cn.bestwiz.design.tc;import java.math.BigDecimal;import java.util.Date;public class Tick {private BigDecimal askPrice; private BigDecimal bidPrice; private BigDecimal midPrice; private Date tickTime; private String seqno; public String getSeqno() { return seqno; } public void setSeqno(String seqno) { this.seqno = seqno; } public BigDecimal getAskPrice() { return askPrice; } public void setAskPrice(BigDecimal askPrice) { this.askPrice = askPrice; } public BigDecimal getBidPrice() { return bidPrice; } public void setBidPrice(BigDecimal bidPrice) { this.bidPrice = bidPrice; } public BigDecimal getMidPrice() { return midPrice; } public void setMidPrice(BigDecimal midPrice) { this.midPrice = midPrice; } public Date getTickTime() { return tickTime; } public void setTickTime(Date tickTime) { this.tickTime = tickTime; }}

TickCacheServlet.java

 

 package cn.bestwiz.design.tc.servlet;import java.io.IOException;import java.util.HashMap;import java.util.Map;import javax.servlet.ServletException;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import cn.bestwiz.design.tc.Tick;import flex.messaging.MessageBroker;import flex.messaging.messages.AsyncMessage;import flex.messaging.util.UUIDUtils;public class TickCacheServlet extends HttpServlet {private static final long serialVersionUID = 1L;private static FeedThread thread;protected void doGet(HttpServletRequest req, HttpServletResponse resp)throws ServletException, IOException {//String cmd = req.getParameter("cmd");//if (cmd.equals("start")) {//start();//}//if (cmd.equals("stop")) {//stop();//}doPost(req, resp);}protected void doPost(HttpServletRequest req, HttpServletResponse resp)throws ServletException, IOException {start();}public void destroy() {super.destroy();}public void init() throws ServletException {super.init();}public void start() {if (thread == null) {thread = new FeedThread();thread.start();}System.out.println("start!!");}public void stop() {thread.running = false;thread = null;}public static class FeedThread extends Thread {public boolean running = true;public void run() {MessageBroker msgBroker = MessageBroker.getMessageBroker(null);String clientID = UUIDUtils.createUUID();int i = 0;while (running) {Tick tick = new Tick();tick.setSeqno(String.valueOf(i));System.out.println(i);AsyncMessage msg = new AsyncMessage();msg.setDestination("tick-data-feed");msg.setHeader(AsyncMessage.SUBTOPIC_HEADER_NAME, "tick");/* * 在此添加过滤 */Map headers=new HashMap();headers.put("prop1", 10);msg.setHeaders(headers);msg.setClientId(clientID);msg.setMessageId(UUIDUtils.createUUID());msg.setTimestamp(System.currentTimeMillis());msg.setBody(tick);msgBroker.routeMessageToService(msg, null);try {Thread.sleep(2000);} catch (InterruptedException e) {}}}}}

 

 

flex_blazeds.mxml

 <?xml version="1.0" encoding="utf-8"?><mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute" viewSourceURL="srcview/index.html" creationComplete="submsg()" height="378" width="426"><mx:Script><!--[CDATA[import mx.controls.Alert;import mx.messaging.ChannelSet;import mx.messaging.Consumer;import mx.messaging.events.MessageEvent;import mx.messaging.channels.StreamingAMFChannel;[Bindable]public var tick:Tick;public function submsg():void{Alert.show("click start");var consumer:Consumer = new Consumer();consumer.destination = "tick-data-feed";consumer.subtopic = "tick";consumer.selector="prop1 = 10";var url:String ="http://localhost:8080/flex_blazeds/"; var myStreamingAMF:StreamingAMFChannel = new StreamingAMFChannel(url+"my-streaming-amf", url+"messagebroker/streamingamf"); var channelSet:ChannelSet = new ChannelSet();channelSet.addChannel(myStreamingAMF);consumer.channelSet = channelSet; consumer.addEventListener(MessageEvent.MESSAGE, messageHandler);consumer.subscribe();Alert.show("click end");}private function messageHandler(event:MessageEvent):void {var tick:Tick = event.message.body as Tick;txtTick.text = tick.seqno;text1.text=tick.seqno;}]]--></mx:Script><mx:Panel x="32" y="43" width="362" height="302" layout="absolute" title="Watch Tick"><mx:Label x="72" y="43" text="Label" id="txtTick"/><mx:Text id="text1" text="123" x="82" y="10"></mx:Text></mx:Panel></mx:Application>

 

Tick.as

package{[RemoteClass(alias="cn.bestwiz.design.tc.Tick")][Bindable]public class Tick{ public var askPrice:Number;public var bidPrice:Number;public var midPrice:Number;public var tickTime:Date;;public var seqno:String;}}

triggerServlet.mxml为促发servlet服务

<?xml version="1.0" encoding="utf-8"?><s:Application xmlns:fx="http://ns.adobe.com/mxml/2009" xmlns:s="library://ns.adobe.com/flex/spark" xmlns:mx="library://ns.adobe.com/flex/mx" minWidth="955" minHeight="600"><s:layout><s:BasicLayout/></s:layout><fx:Script><!--[CDATA[private function trigger():void{var request:URLRequest = new URLRequest("http://localhost:8080/flex_blazeds/TickCacheServlet");request.method = URLRequestMethod.POST;var loader:URLLoader = new URLLoader();loader.load(request);<!-- loader.addEventListener(Event.COMPLETE, onComplete);-->}]]--></fx:Script><fx:Declarations><!-- 将非可视元素（例如服务、值对象）放在此处 --></fx:Declarations><mx:Button label="triggerSev" click="trigger();"></mx:Button></s:Application>

 

在messging-config.xml中添加destination

<destination id="tick-data-feed"> <properties> <server> <allow-subtopics>true</allow-subtopics> <subtopic-separator>.</subtopic-separator> </server> </properties> <channels> <channel ref="my-polling-amf" /> <channel ref="my-streaming-amf" /> </channels> </destination>

在services-config.xml中添加channel

<channel-definition id="my-streaming-amf" class="mx.messaging.channels.StreamingAMFChannel"> <endpoint url="http://{server.name}:{server.port}/{context.root}/messagebroker/streamingamf" class="flex.messaging.endpoints.StreamingAMFEndpoint"/> <properties> <idle-timeout-minutes>0</idle-timeout-minutes> <max-streaming-clients>10</max-streaming-clients> <server-to-client-heartbeat-millis>5000</server-to-client-heartbeat-millis> <user-agent-settings> <user-agent match-on="MSIE" kickstart-bytes="2048" max-streaming-connections-per-session="1"/> <user-agent match-on="Firefox" kickstart-bytes="2048" max-streaming-connections-per-session="1"/> </user-agent-settings> </properties> </channel-definition>

在web.xml文件中添加

<servlet> <description>This is the description of my J2EE component</description> <display-name>This is the display name of my J2EE component</display-name> <servlet-name>TickCacheServlet</servlet-name> <servlet-class>cn.bestwiz.design.tc.servlet.TickCacheServlet</servlet-class> </servlet> <servlet-mapping> <servlet-name>TickCacheServlet</servlet-name> <url-pattern>/TickCacheServlet</url-pattern> </servlet-mapping>

 

至此大功告成,首先将项目发布到tomcat上,然后运行triggerservlet和flex_blazeds.mxml,在未发布(触发)之前,订阅端flex_blazeds.mxml是接收不到任何消息,触发之后则能够接到消息.

 

该工作完成感谢网上各位前辈的经验给我的指导,在此有所转载望前辈谅解