Java send message to flex (BlazeDS)

The steps are as follows:
1. Download BlazeDS. war and unzip it to the % TOMCAT_HOME %/webapps directory file named blazeds contains the WEB-INF and META-INF folders.
2. Write a flex client dsMessage. mxml
[Html]
<? Xml version = "1.0" encoding = "UTF-8"?>
<Mx: Application xmlns: mx = "http://www.adobe.com/2006/mxml" layout = "vertical"
CreationComplete = "applicationInit ()">
<Mx: Script>
<! [CDATA [
Import mx. messaging. ChannelSet;
Import mx. messaging. channels. AMFChannel;
Import mx. controls. Alert;
Import mx. messaging. events. MessageEvent;
Import mx. messaging. messages. AsyncMessage;
Import mx. messaging. events. MessageFaultEvent;
Import mx. messaging. events. MessageAckEvent;
Import mx. rpc. events. ResultEvent;
Import mx. rpc. events. FaultEvent;

Private function applicationInit (): void {
Var url: String = "http: // 192.168.1.102/blazeds/"; // use a blazeds application. If 192.168.1.102 is changed to localhost, other computers cannot access it.
// Var myStreamingAMF: StreamingAMFChannel = new StreamingAMFChannel (url + "my-streaming-amf", url + "messagebroker/streamingamf ");
Var myPollingAMF: AMFChannel = new AMFChannel (url + "my-polling-amf", url + "messagebroker/amfpolling ");
MyPollingAMF. pollingEnabled = true; // round robin
MyPollingAMF. pollingInterval = 1000; // The interval at which a miao is queried.
Var channelSet: ChannelSet = new ChannelSet ();
// ChannelSet. addChannel (myStreamingAMF );
ChannelSet. addChannel (myPollingAMF );

MessageProducer. channelSet = channelSet;
MessageConsumer. channelSet = channelSet;

MessageConsumer. subscribe ();
}

Private function addMessageToArea (message: String): void
{
ChatMessagesArea. text = chatMessagesArea. text + "\ n" + message;
}

Private function handleResponse (event: MessageEvent): void
{
Var message: String = null;
Message = event. message. headers ["sender"] + ":" + event. message. body;
AddMessageToArea (message );
}
Private function sendMessage (): void
{
Var message: AsyncMessage = new AsyncMessage ();
Message. headers = new Array ();
Message. headers ["sender"] = "sunny ";
Message. body = chatMessageTxt. text;
MessageProducer. send (message );
ChatMessageTxt. text = "";
}

Private function handleFaults (event: MessageFaultEvent): void
{
Alert. show (event. faultString );
}

Private function handleAcknowledgements (event: MessageAckEvent): void
{
Trace ("done ");
}

]>
</Mx: Script>
 
<Mx: Producer id = "messageProducer"
Destination = "mychat"
Fault = "handleFaults (event );"
Acknowledge = "handleAcknowledgements (event )"
/>
<Mx: Consumer id = "messageConsumer"
Destination = "mychat"
Fault = "handleFaults (event )"
Message = "handleResponse (event )"
/>
<Mx: VBox width = "100%" height = "100%">
<Mx: TextArea id = "chatMessagesArea" editable = "false" width = "100%" height = "100%"
FontFamily = "Georgia" fontSize = "19" color = "# 2194AD"/>
<Mx: HBox width = "100%" height = "27">
<Mx: TextInput id = "chatMessageTxt" width = "100%" height = "100%"
FontFamily = "Georgia" fontSize = "15" enter = "sendMessage ()"/>
<Mx: Button id = "chatMessageBtn" label = "Send" width = "64"
Height = "100%" click = "sendMessage ();"/>
</Mx: HBox>
</Mx: VBox>

</Mx: Application>

3. Write a java class MessageSender
[Java]
Package com. kinorsoft;
Import java. util. Date;
 
Import flex. messaging. MessageBroker;
Import flex. messaging. messages. AsyncMessage;
 
Public class MessageSender {
 
Public void sendMessageToClients (String messageBody)
{
AsyncMessage msg = new AsyncMessage ();
 
Msg. setClientId ("Java-Based-Producer-For-Messaging ");
Msg. setTimestamp (new Date (). getTime ());
// You can create a unique id
Msg. setMessageId ("Java-Based-Producer-For-Messaging-ID ");
// Destination to which the message is to be sent
Msg. setDestination ("mychat ");
// Set message body
Msg. setBody (messageBody! = Null? MessageBody :"");
// Set message header
Msg. setHeader ("sender", "From the server ");
 
// Send message to destination
MessageBroker. getMessageBroker (null). routeMessageToService (msg, null );
}
 
}

4. MessageSender. jsp calls the above MessageSender. java
[Java]
<% @ Page import = "com. kinorsoft. MessageSender" %>
<%
Try
{

Com. kinorsoft. MessageSender msg = new com. kinorsoft. MessageSender ();
Msg. sendMessageToClients ("This is from the jsp page ");
Out. println ("sent message ");
} Www.2cto.com
Catch (Exception e)
{
E. printStackTrace ();
}
%>
5. Modify the WEB-INF/flex/messaging-config.xml
Add
<Destination id = "mychat"> </destination>