Blazeds向客戶端推送數據

從服務器向客戶端推送數據：

1.services-config.xml

<channel-definition id="my-streaming-amf" class="mx.messaging.channels.StreamingAMFChannel"> <endpoint url="http://134.160.149.156:8400/blazeds_test/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="8"/> <user-agent match-on="Firefox" kickstart-bytes="2048" max-streaming-connections-per-session="1"/> </user-agent-settings> </properties> </channel-definition>  

設置user-agent中參數調整最大連接數。

 

2.messaging-config.xml

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

allow-subtopics爲可以設置子標題

subtopic-separator是標題的分隔符默認是“.”

channel默認是“my-streaming-amf”如果失敗採用“my-polling-amf” 

 

3.創建JAVA實體對象做爲傳輸的格式

package test.blazeds.push; import java.math.BigDecimal; import java.util.Date; public class Tick { private BigDecimal askPrice; private BigDecimal bidPrice; private BigDecimal midPrice; private String seqno = null; 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; } private Date tickTime; }

 

4.向blazeds服務發送數據的servlet，屬於生產者的角色

package test.blazeds.push; 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 flex.messaging.MessageBroker; import flex.messaging.messages.AsyncMessage; import flex.messaging.util.UUIDUtils; public class TickCacheServlet extends HttpServlet { private static FeedThred thread; @Override protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { String cmd = req.getParameter("cmd"); if ("start".equals(cmd)) { start(); } else { stop(); } } @Override protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { // TODO Auto-generated method stub super.doGet(req, resp); } public void start() { if (thread == null) { thread = new FeedThred(); thread.start(); } } public void stop() { thread.running = false; thread = null; } public static class FeedThred extends Thread { public boolean running = true; @Override public void run() { MessageBroker msgBroker = MessageBroker.getMessageBroker(null); String clientID = UUIDUtils.createUUID(); System.out.println("Client ID:" + clientID); 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)); AsyncMessage am = new AsyncMessage(); am.setDestination("tick-data-feed"); am.setHeader("DSSubtopic", "tick"); am.setClientId(clientID); String msgID = UUIDUtils.createUUID(); //System.out.println("MESSAGE ID:" + msgID); am.setMessageId(msgID); am.setTimestamp(System.currentTimeMillis()); am.setBody(tick); msgBroker.routeMessageToService(am, null); i++; //System.out.println("i=" + i); try { Thread.sleep(20); } catch (InterruptedException e) { // TODO Auto-generated catch block e.printStackTrace(); } } } } }

 

5.創建AS的實體映射類

// ActionScript file package cn.sloppy { [RemoteClass(alias="test.blazeds.push.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; } }

 

6.定義消費者

<?xml version="1.0" encoding="utf-8"?> <mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute" height="378" width="426"> <mx:Script> <!--[CDATA[ import mx.controls.Alert; import mx.rpc.events.ResultEvent; import mx.messaging.Consumer; import mx.messaging.Channel; import mx.messaging.ChannelSet; import mx.messaging.channels.StreamingAMFChannel; import mx.messaging.events.MessageEvent; import cn.sloppy.Tick; [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"; var channelSet:ChannelSet = new ChannelSet(); var channel:StreamingAMFChannel = new StreamingAMFChannel("my-streaming-amf", "http://localhost:8400/blazeds_test/messagebroker/streamingamf"); channelSet.addChannel(channel); consumer.channelSet = channelSet; //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; //Alert.show(tick.seqno); txtTick.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:Button x="132" y="41" label="Button" click="submsg(); "/> </mx:Panel> </mx:Application>