blazeds推送技术至Flex

blazeds推送技术至Flex zz     
转自http://www.sloppy.cn/blog/article/247.htm     
第一步下载blazeds.war     
第二步修改两个配置文件：services-config.xml，messaging-config.xml     
    
services-config.xml加入下面代码     
    
程序代码     
    
<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>      
    
    
    
messaging-config.xml加入下面的代码     
    
程序代码     
    
<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>     
    
    
    
第三步：创建一个Servlet:     
    
程序代码     
    
package cn.bestwiz.design.tc.servlet;     
    
import java.io.IOException;     
import java.math.BigDecimal;     
import java.util.Date;     
    
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;     
    
    @Override    
    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();     
        }     
    }     
    
    @Override    
    protected void doPost(HttpServletRequest req, HttpServletResponse resp)     
            throws ServletException, IOException {     
        // TODO Auto-generated method stub     
        super.doGet(req, resp);     
    }     
    
    @Override    
    public void destroy() {     
        // TODO Auto-generated method stub     
        super.destroy();     
    }     
    
    @Override    
    public void init() throws ServletException {     
        // TODO Auto-generated method stub     
        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.setAskPrice(new BigDecimal("100"));     
                tick.setBidPrice(new BigDecimal("100"));     
                tick.setMidPrice(new BigDecimal("100"));     
                tick.setTickTime(new Date());     
    
                tick.setSeqno(String.valueOf(i));     
                System.out.println(i);     
    
                AsyncMessage msg = new AsyncMessage();     
                msg.setDestination("tick-data-feed");     
                msg.setHeader("DSSubtopic", "tick");     
                msg.setClientId(clientID);     
                msg.setMessageId(UUIDUtils.createUUID());     
                msg.setTimestamp(System.currentTimeMillis());     
                msg.setBody(tick);     
                msgBroker.routeMessageToService(msg, null);     
                i++;     
                try {     
                    Thread.sleep(20);     
                } catch (InterruptedException e) {     
                }     
    
            }     
        }     
    }     
    
}     
    
    
    
第四步：创建一个Java类:     
    
程序代码     
    
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;     
    }     
    
}     
    
    
    
    
第五步：     
配置Flex项目：     
Root Folder:C:\Program Files\Apache Software Foundation\Tomcat 6.0\webapps\blazeds     
Root URL:http://localhost:8080/blazeds     
Context Root:/blazeds     
    
第六步：创建AS类：     
    
程序代码     
    
package cn.sloppy     
{     
    [RemoteClass(alias="cn.bestwiz.design.tc.Tick")]     
    [Bindable]     
    public class Tick     
    {     
        public function Tick()     
        {     
        }     
        public var askPrice:Number;     
        public var bidPrice:Number;     
        public var midPrice:Number;     
        public var tickTimeate;;     
        public var seqno:String;     
    
    }     
}     
    
    
第七步：Flex主程序代码     
    
程序代码     
    
//     
            import mx.controls.Alert;     
            import mx.rpc.events.ResultEvent;     
            import mx.messaging.Consumer;     
            import mx.messaging.Channel;     
            import mx.messaging.ChannelSet;     
            import mx.messaging.events.MessageEvent;     
            //      
[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.channelSet = new ChannelSet(["my-streaming-amf"]);     
                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;     
            }     
<mx:Panel x="524" y="47" width="362" height="302" layout="absolute" title="Watch Tick">     
        <mx:Label x="72" y="43" text="Label" id="txtTick"/>     
        <mx:Button x="132" y="41" label="Button" click="submsg(); "/>     
    </mx:Panel>     
    
    
第七步：运行Flex：http://localhost:8080/blazeds/HelloWorld-debug/HelloWorld.html?debug=true     
点击Button     
迂曲运行Servlet：http://localhost:8080/blazeds/TickCacheServlet?cmd=start     
再看看Flex的效果：是不是文字一直在增长？     
恭喜。成功了。