blazeds推送技术至Flex 博客分类： Flex-blazeds FlexServletthreadXMLTomcat

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

<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

<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:

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:

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：

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 tickTime:Date;;
        public var seqno:String;

    }
}

 

 

第七步：Flex主程序代码

 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。