今天在网上看到一遍通过Blazeds中的StreamingAMFChannel通过进行通讯的方法。非常喜欢,特记录下来以备以后使用。
这个方法是首先建立一个Servlet程序,如下例所示:
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 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) {
UserDto user = new UserDto ();
user.setId(1);
user.setName("test");
user.setDept("财务部")
user.setCreateDate(new Date());
System.out.println(i);
AsyncMessage msg = new AsyncMessage();
msg.setDestination("user_Tun");
msg.setHeader("DSSubtopic", "user");
msg.setClientId(clientID);
msg.setMessageId(UUIDUtils.createUUID());
msg.setTimestamp(System.currentTimeMillis());
msg.setBody(user);
msgBroker.routeMessageToService(msg, null);
i++;
try {
Thread.sleep(20);
} catch (InterruptedException e) {
}
}
}
}
}
2。设置services-config.xml,在其中加入:
<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文件中,加入如下:
<destination id="user_Tun">
<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>
4.Flex执行程序
<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute" viewSourceURL="srcview/index.html" 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.events.MessageEvent;
[Bindable]
public var user:UserVO;
public function sendmsg():void
{
Alert.show("click start");
var consumer:Consumer = new Consumer();
consumer.destination = "user_Tun";
consumer.subtopic = "user";
consumer.channelSet = new ChannelSet(["my-streaming-amf"]);
consumer.addEventListener(MessageEvent.MESSAGE, messageHandler);
consumer.subscribe();
}
private function messageHandler(event:MessageEvent):void
{
var t:UserVO = event.message.body as UserVO;
txtName.text = t.name;
}
]]>
</mx:Script>
<mx:Panel x="32" y="43" width="362" height="302" layout="absolute" >
<mx:Label x="72" y="43" text="Label" id="txtName"/>
<mx:Button x="132" y="41" label="Button" click="sendmsg(); "/>
</mx:Panel>
</mx:Application>
----再次感谢这个作者给了一个非常好的思路。文章略有修改。
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