git-svn-id: https://svn.apache.org/repos/asf/activemq/trunk@935623 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Bosanac Dejan 2010-04-19 15:27:15 +00:00
parent 1eb339f46d
commit e7c4c48ab6
12 changed files with 5946 additions and 1557 deletions

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@ -16,7 +16,7 @@
*/
div#chatroom
{
width: 41em;
width: 81em;
background-color: #e0e0e0;
border: 1px solid black;
}
@ -24,8 +24,8 @@ div#chatroom
div#chat
{
float: left;
width: 30em;
height: 20ex;
width: 60em;
height: 40ex;
overflow: auto;
background-color: #f0f0f0;
padding: 4px;
@ -36,7 +36,7 @@ div#members
{
float: left;
clear: right;
width: 10em;
width: 20em;
border: 0px solid black;
}

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@ -1,35 +1,114 @@
<!--
Licensed to the Apache Software Foundation (ASF) under one or more
contributor license agreements. See the NOTICE file distributed with
this work for additional information regarding copyright ownership.
The ASF licenses this file to You under the Apache License, Version 2.0
(the "License"); you may not use this file except in compliance with
the License. You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
Licensed to the Apache Software Foundation (ASF) under one or more
contributor license agreements. See the NOTICE file distributed with
this work for additional information regarding copyright ownership.
The ASF licenses this file to You under the Apache License, Version 2.0
(the "License"); you may not use this file except in compliance with
the License. You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
-->
<html>
<head>
<title>Chat</title>
<script type="text/javascript" src="amq/amq.js"></script>
<script type="text/javascript">amq.uri='amq';</script>
<script type="text/javascript" src="chat.js"></script>
<link rel="stylesheet" href="chat.css" type="text/css">
<link rel="stylesheet" href="style.css" type="text/css">
</head>
<body>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
<title>Chat Example - ActiveMQ Web Demos</title>
<link rel="stylesheet" href="chat.css" type="text/css">
<style type="text/css" media="screen">
@import url(/admin/styles/sorttable.css);
@import url(/admin/styles/type-settings.css);
@import url(/admin/styles/site.css);
@import url(/admin/styles/prettify.css);
</style>
<!--<script type="text/javascript" src="js/prototype.js"></script>-->
<!--<script type="text/javascript" src="js/amq_prototype_adapter.js"></script>-->
<script type="text/javascript" src="js/jquery-1.4.2.min.js"></script>
<script type="text/javascript" src="js/amq_jquery_adapter.js"></script>
<script type="text/javascript" src="js/amq.js"></script>
<script type="text/javascript" src="js/chat.js"></script>
<script type="text/javascript">
// Note, normally you wouldn't just add an onload function in this
// manner. In fact, you typically want to fire this method on the
// document.onready event, however this type of functionality is verbose
// and best left to the domain of your favorite js library.
//
// For example, in jQuery the following onload would be replaced with:
// jQuery(function() {
// org.activemq.Amq.init({ uri: 'amq' });
// org.activemq.Chat.init();
// }
window.onload = function() {
org.activemq.Amq.init({ uri: 'amq', logging: true, timeout: 45 });
org.activemq.Chat.init();
};
</script>
</head>
<body>
<div class="white_box">
<div class="header">
<div class="header_l">
<div class="header_r">
</div>
</div>
</div>
<div class="content">
<div class="content_l">
<div class="content_r">
<div>
<!-- Banner -->
<div id="asf_logo">
<div id="activemq_logo">
<a style="float:left; width:280px;display:block;text-indent:-5000px;text-decoration:none;line-height:60px; margin-top:10px; margin-left:100px;"
href="http://activemq.apache.org/"
title="The most popular and powerful open source Message Broker">ActiveMQ</a>
<a style="float:right; width:210px;display:block;text-indent:-5000px;text-decoration:none;line-height:60px; margin-top:15px; margin-right:10px;"
href="http://www.apache.org/" title="The Apache Software Foundation">ASF</a>
</div>
</div>
<div class="top_red_bar">
<div id="site-breadcrumbs">
<a href="index.html" title="Home">Home</a>
</div>
<div id="site-quicklinks"><P>
<a href="http://activemq.apache.org/support.html"
title="Get help and support using Apache ActiveMQ">Support</a></p>
</div>
</div>
<table border="0">
<tbody>
<tr>
<td valign="top" width="100%" style="overflow:hidden;">
<div class="body-content">
<h1>Chat Example</h1>
Welcome to this little chat example
<br>
<br>
<p>Welcome to the Ajax chat example</p>
<div id="chatroom">
<div id="chat"></div>
@ -37,15 +116,104 @@ Welcome to this little chat example
<div id="members"></div>
<div id="input">
<div id="join" class="hidden">Username:&nbsp;<input id="username" type="text" />
<input id="joinB" class="button" type="submit" name="join" value="Join" />
<div id="join" class="hidden">
Username:&nbsp;
<input id="username" type="text"/>
<button id="joinB">Join</button>
</div>
<div id="joined" class="hidden">
Chat:&nbsp;
<input id="phrase" type="text" />
<button id="sendB">Send</button>
<button id="leaveB">Leave</button>
</div>
<div id="joined" class="hidden">Chat:&nbsp;<input id="phrase" type="text"></input>
<input id="sendB" class="button" type="submit" name="join" value="Send" />
<input id="leaveB" class="button" type="submit" name="join" value="Leave" />
</div>
</div>
</div>
</body>
</html>
<p>
This Chat example creates an ActiveMQ broker using the configuration
information found in the <code>web.xml</code> file. There isn't much there.
Just a name-value parameter named <code>org.apache.activemq.brokerURL</code>
is assigned a value of <code>vm://localhost?broker.persistent=false</code>.
This is enough however to lazy-initialize the broker when it is needed.
</p>
<p>
The client leverages a javascript library <code>amq.js</code> to perform all
of the JMS-related client side code. This involves establishing a
communication pipeline to the JMS server. This pipeline uses a long-poll
connection to the server. All JMS communication will be received down this
pipe, and when the JMS server has no traffic to send, this pipeline will
patiently wait until there is new traffic or until it times out. If a
timeout does occur, the connection will reconnect to the server for another
round. (Of course you will want/need to use a server that supports
continuations in order for this to scale beyond a few hundred clients.)
</p>
<p>
The <code>chat.js</code> file contains the script to respond to the UI
interactions. It also talks to the <code>amq.js</code> file to send messages
and provides a message handler that will respond to incoming JMS messages.
</p>
<p>
There is no server-side state in this application. The client sets up a JMS
Topic on the server and attaches itself as a listener to this topic. From
that point, all messages that are sent to the topic are received by each
listener. Even the list of members in the chat room are the result of
clients replying to a ping request.
</p>
<p>
Please note that <code>amq.js</code> has been refactored to allow AJAX calls
to be made using any javascript library. Example adapter classes for <a href="http://jquery.com/">jQuery</a>
and <a href="http://www.prototypejs.org/">Prototype</a> have been provided.
</p>
</div>
</td>
<td valign="top">
<div class="navigation">
<div class="navigation_top">
<div class="navigation_bottom">
<H3>Useful Links</H3>
<ul class="alternate" type="square">
<li><a href="http://activemq.apache.org/"
title="The most popular and powerful open source Message Broker">Documentation</a></li>
<li><a href="http://activemq.apache.org/faq.html">FAQ</a></li>
<li><a href="http://activemq.apache.org/download.html">Downloads</a>
</li>
<li><a href="http://activemq.apache.org/discussion-forums.html">Forums</a>
</li>
</ul>
</div>
</div>
</div>
</td>
</tr>
</tbody>
</table>
<div class="bottom_red_bar"></div>
</div>
</div>
</div>
</div>
<div class="black_box">
<div class="footer">
<div class="footer_l">
<div class="footer_r">
<div>
Copyright 2005-2007 The Apache Software Foundation.
(<a href="?printable=true">printable version</a>)
</div>
</div>
</div>
</div>
</div>
</div>
<div class="design_attribution"><a href="http://hiramchirino.com/">Graphic Design By Hiram</a></div>
</body>
</html>

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@ -1,213 +0,0 @@
/**
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
var room =
{
_last: "",
_username: null,
_chatTopic: "topic://CHAT.DEMO",
join: function()
{
var name = $('username').value;
if (name == null || name.length==0 )
{
alert('Please enter a username!');
}
else
{
this._username=name;
amq.addListener('chat',this._chatTopic,room._chat);
$('join').className='hidden';
$('joined').className='';
$('phrase').focus();
Behaviour.apply();
amq.sendMessage(this._chatTopic, "<message type='join' from='" + room._username + "'/>");
}
},
leave: function()
{
amq.removeListener('chat',this._chatTopic);
// switch the input form
$('join').className='';
$('joined').className='hidden';
$('username').focus();
Behaviour.apply();
amq.sendMessage(this._chatTopic, "<message type='leave' from='" + room._username + "'/>");
room._username=null;
},
chat: function(text)
{
if (text != null && text.length>0 )
{
// TODO more encoding?
text=text.replace('<','&lt;');
text=text.replace('>','&gt;');
amq.sendMessage(this._chatTopic, "<message type='chat' from='" + room._username + "'>" + text + "</message>");
}
},
_chat: function(message)
{
var chat=$('chat');
var type=message.getAttribute('type');
var from=message.getAttribute('from');
switch(type)
{
case 'chat' :
{
var text=message.childNodes[0].data;
if ( from == room._last )
from="...";
else
{
room._last=from;
from+=":";
}
chat.innerHTML += "<span class=\"from\">"+from+"&nbsp;</span><span class=\"text\">"+text+"</span><br/>";
break;
}
case 'ping' :
{
$('members').innerHTML+="<span class=\"member\">"+from+"</span><br/>";
break;
}
case 'join' :
{
$('members').innerHTML="";
if (room._username!=null)
amq.sendMessage(this._chatTopic, "<message type='ping' from='" + room._username + "'/>");
chat.innerHTML += "<span class=\"alert\"><span class=\"from\">"+from+"&nbsp;</span><span class=\"text\">has joined the room!</span></span><br/>";
break;
}
case 'leave':
{
$('members').innerHTML="";
if (room._username!=null)
amq.sendMessage(this._chatTopic, "<message type='ping' from='" + room._username + "'/>");
chat.innerHTML += "<span class=\"alert\"><span class=\"from\">"+from+"&nbsp;</span><span class=\"text\">has left the room!</span></span><br/>";
break;
}
}
chat.scrollTop = chat.scrollHeight - chat.clientHeight;
},
_poll: function(first)
{
if (first || $('join').className=='hidden' && $('joined').className=='hidden')
{
$('join').className='';
$('joined').className='hidden';
$('username').focus();
Behaviour.apply();
}
}
};
amq.addPollHandler(room._poll);
var chatBehaviours =
{
'#username' : function(element)
{
element.setAttribute("autocomplete","OFF");
element.onkeyup = function(ev)
{
var keyc=getKeyCode(ev);
if (keyc==13 || keyc==10)
{
room.join();
return false;
}
return true;
}
},
'#joinB' : function(element)
{
element.onclick = function(event)
{
room.join();
return true;
}
},
'#phrase' : function(element)
{
element.setAttribute("autocomplete","OFF");
element.onkeyup = function(ev)
{
var keyc=getKeyCode(ev);
if (keyc==13 || keyc==10)
{
var text = $F('phrase');
$('phrase').value='';
room.chat(text);
return false;
}
return true;
}
},
'#sendB' : function(element)
{
element.onclick = function(event)
{
var text = $F('phrase');
$('phrase').value='';
room.chat(text);
}
},
'#leaveB' : function(element)
{
element.onclick = function()
{
room.leave();
return false;
}
}
};
Behaviour.register(chatBehaviours);

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@ -0,0 +1,232 @@
/**
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
// AMQ Ajax handler
// This class provides the main API for using the Ajax features of AMQ. It
// allows JMS messages to be sent and received from javascript when used
// with the org.apache.activemq.web.MessageListenerServlet.
//
// This version of the file provides an adapter interface for the jquery library
// and a namespace for the Javascript file, private/public variables and
// methods, and other scripting niceties. -- jim cook 2007/08/28
var org = org || {};
org.activemq = org.activemq || {};
org.activemq.Amq = function() {
var connectStatusHandler;
// Just a shortcut to eliminate some redundant typing.
var adapter = org.activemq.AmqAdapter;
if (typeof adapter == 'undefined') {
throw 'An org.activemq.AmqAdapter must be declared before the amq.js script file.'
}
// The URI of the AjaxServlet.
var uri;
// The number of seconds that the long-polling socket will stay connected.
// Best to keep this to a value less than one minute.
var timeout;
// Poll delay. if set to positive integer, this is the time to wait in ms
// before sending the next poll after the last completes.
var pollDelay;
// Inidicates whether logging is active or not. Not by default.
var logging = false;
// 5 second delay if an error occurs during poll. This could be due to
// server capacity problems or a timeout condition.
var pollErrorDelay = 5000;
// Map of handlers that will respond to message receipts. The id used during
// addListener(id, destination, handler) is used to key the callback
// handler.
var messageHandlers = {};
// Indicates whether an AJAX post call is in progress.
var batchInProgress = false;
// A collection of pending messages that accumulate when an AJAX call is in
// progress. These messages will be delivered as soon as the current call
// completes. The array contains objects in the format { destination,
// message, messageType }.
var messageQueue = [];
/**
* Iterate over the returned XML and for each message in the response,
* invoke the handler with the matching id.
*/
var messageHandler = function(data) {
var response = data.getElementsByTagName("ajax-response");
if (response != null && response.length == 1) {
connectStatusHandler(true);
var responses = response[0].childNodes; // <response>
for (var i = 0; i < responses.length; i++) {
var responseElement = responses[i];
// only process nodes of type element.....
if (responseElement.nodeType != 1) continue;
var id = responseElement.getAttribute('id');
var handler = messageHandlers[id];
if (logging && handler == null) {
adapter.log('No handler found to match message with id = ' + id);
continue;
}
// Loop thru and handle each <message>
for (var j = 0; j < responseElement.childNodes.length; j++) {
handler(responseElement.childNodes[j]);
}
}
}
};
var errorHandler = function(xhr, status, ex) {
connectStatusHandler(false);
if (logging) adapter.log('Error occurred in ajax call. HTTP result: ' +
xhr.status + ', status: ' + status);
}
var pollErrorHandler = function(xhr, status, ex) {
connectStatusHandler(false);
if (status === 'error' && xhr.status === 0) {
if (logging) adapter.log('Server connection dropped.');
setTimeout(function() { sendPoll(); }, pollErrorDelay);
return;
}
if (logging) adapter.log('Error occurred in poll. HTTP result: ' +
xhr.status + ', status: ' + status);
setTimeout(function() { sendPoll(); }, pollErrorDelay);
}
var pollHandler = function(data) {
try {
messageHandler(data);
} catch(e) {
if (logging) adapter.log('Exception in the poll handler: ' + data, e);
throw(e);
} finally {
setTimeout(sendPoll, pollDelay);
}
};
var sendPoll = function() {
// Workaround IE6 bug where it caches the response
// Generate a unique query string with date and random
var now = new Date();
var data = 'timeout=' + timeout * 1000
+ '&d=' + now.getTime()
+ '&r=' + Math.random();
var options = { method: 'get',
data: data,
success: pollHandler,
error: pollErrorHandler};
adapter.ajax(uri, options);
};
var sendJmsMessage = function(destination, message, type) {
// Add message to outbound queue
if (batchInProgress) {
messageQueue[messageQueue.length] = {
destination: destination,
message: message,
messageType: type
};
} else {
org.activemq.Amq.startBatch();
adapter.ajax(uri, { method: 'post',
data: 'destination=' + destination + '&message=' + message + '&type=' + type,
error: errorHandler,
success: org.activemq.Amq.endBatch});
}
};
var buildParams = function(msgs) {
var s = [];
for (var i = 0, c = msgs.length; i < c; i++) {
if (i != 0) s[s.length] = '&';
s[s.length] = ((i == 0) ? 'destination' : 'd' + i);
s[s.length] = '=';
s[s.length] = msgs[i].destination;
s[s.length] = ((i == 0) ? '&message' : '&m' + i);
s[s.length] = '=';
s[s.length] = msgs[i].message;
s[s.length] = ((i == 0) ? '&type' : '&t' + i);
s[s.length] = '=';
s[s.length] = msgs[i].messageType;
}
return s.join('');
}
return {
init : function(options) {
connectStatusHandler = options.connectStatusHandler || function(connected){};
uri = options.uri || '/amq';
pollDelay = typeof options.pollDelay == 'number' ? options.pollDelay : 0;
timeout = typeof options.timeout == 'number' ? options.timeout : 25;
logging = options.logging;
adapter.init(options);
sendPoll();
},
startBatch : function() {
batchInProgress = true;
},
endBatch : function() {
if (messageQueue.length > 0) {
var body = buildParams(messageQueue);
messageQueue.length = 0;
org.activemq.Amq.startBatch();
adapter.ajax(uri, {
method: 'post',
data: body,
success: org.activemq.Amq.endBatch,
error: errorHandler});
} else {
batchInProgress = false;
}
},
// Send a JMS message to a destination (eg topic://MY.TOPIC). Message
// should be xml or encoded xml content.
sendMessage : function(destination, message) {
sendJmsMessage(destination, message, 'send');
},
// Listen on a channel or topic.
// handler must be a function taking a message argument
addListener : function(id, destination, handler) {
messageHandlers[id] = handler;
sendJmsMessage(destination, id, 'listen');
},
// remove Listener from channel or topic.
removeListener : function(id, destination) {
messageHandlers[id] = null;
sendJmsMessage(destination, id, 'unlisten');
}
};
}();

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@ -0,0 +1,80 @@
/**
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
// AMQ Ajax Adapter for Dojo
// This class provides an adapter interface for the Dojo library to perform
// some of the library-dependent tasks...namely logging and ajax.
var org = org || {};
org.activemq = org.activemq || {};
org.activemq.AmqAdapter = {
init: function(options) {
},
/**
* Implement this method to make an AJAX call to the AjaxServlet. An
* options object will accompany this class and will contain the properties
* that describe the details of the AJAX call. The options object will
* have the following properties:
*
* - method: 'get' or 'post'
* - data: query data to accompany the post or get.
* - success: A callback function that is invoked upon successful
* completion of the AJAX call. The parameter is:
* - data: The result of the AJAX call. In the case of XML
* data should resolve to a Document element.
* - error: A callback when some type of error occurs. The callback
* function's parameters should be:
* - xhr: The XmlHttpRequest object.
* - status: A text string of the status.
* - ex: The exception that caused the error.
*/
ajax: function(uri, options) {
if (options.method == 'post') {
dojo.xhrPost({
url: uri,
handleAs: "xml",
postData: options.data,
load : options.success ? options.success : function() {},
error: options.error ? function(ex, ioargs) {
options.error(ioargs.xhr,ioargs.xhr.status, ex);
} : function() {}
});
} else {
if (options.data)
{
uri += "?";
uri += options.data;
}
dojo.xhrGet({
url: uri,
handleAs: "xml",
load : options.success ? options.success : function() {},
error: options.error ? function(ex, ioargs) {
options.error(ioargs.xhr,ioargs.xhr.status, ex);
} : function() {}
});
}
},
log: function(message, exception) {
if (typeof console != 'undefined' && console.log) console.log(message);
}
};

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@ -0,0 +1,80 @@
/**
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
// AMQ Ajax Adapter for jQuery
// This class provides an adapter interface for the jquery library to perform
// some of the library-dependent tasks...namely logging and ajax.
var org = org || {};
org.activemq = org.activemq || {};
org.activemq.AmqAdapter = {
init: function(options) {
},
/**
* Implement this method to make an AJAX call to the AjaxServlet. An
* options object will accompany this class and will contain the properties
* that describe the details of the AJAX call. The options object will
* have the following properties:
*
* - method: 'get' or 'post'
* - data: query data to accompany the post or get.
* - success: A callback function that is invoked upon successful
* completion of the AJAX call. The parameter is:
* - data: The result of the AJAX call. In the case of XML
* data should resolve to a Document element.
* - error: A callback when some type of error occurs. The callback
* function's parameters should be:
* - xhr: The XmlHttpRequest object.
* - status: A text string of the status.
* - ex: The exception that caused the error.
*/
ajax: function(uri, options) {
if (options.method == 'post') {
jQuery.ajax({
type: "POST",
url: uri,
data: options.data,
success: options.success || function(){},
error: options.error || function(){},
beforeSend: function(xhr) {
/* Force "Connection: close" for Mozilla browsers to work around
* a bug where XMLHttpReqeuest sends an incorrect Content-length
* header. See Mozilla Bugzilla #246651.
*/
xhr.setRequestHeader("Connection", 'close');
}
});
} else {
jQuery.ajax({
type: "GET",
url: uri,
data: options.data,
success: options.success || function(){},
error: options.error || function(){},
dataType: 'xml'
});
}
},
log: function(message, exception) {
if (typeof console != 'undefined' && console.log) console.log(message);
}
};

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/**
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
// AMQ Ajax Adapter for Prototype
// This class provides an adapter interface for the prototype library to perform
// some of the library-dependent tasks...namely logging and ajax.
var org = org || {};
org.activemq = org.activemq || {};
org.activemq.AmqAdapter = {
init: function(options) {
},
/**
* Implement this method to make an AJAX call to the AjaxServlet. An
* options object will accompany this class and will contain the properties
* that describe the details of the AJAX call. The options object will
* have the following properties:
*
* - method: 'get' or 'post'
* - data: query data to accompany the post or get.
* - success: A callback function that is invoked upon successful
* completion of the AJAX call. The parameter is:
* - data: The result of the AJAX call. In the case of XML
* data should resolve to a Document element.
* - error: A callback when some type of error occurs. The callback
* function's parameters should be:
* - xhr: The XmlHttpRequest object.
* - status: A text string of the status.
* - ex: The exception that caused the error.
*/
ajax: function(uri, options) {
if (options.method == 'post') {
new Ajax.Request(uri, {
method: "post",
postBody: options.data,
onSuccess: options.success ? function(xhr, header) {
if (options.success) {
var ct = xhr.getResponseHeader("content-type");
var xml = ct && ct.indexOf("xml") >= 0;
var data = xml ? xhr.responseXML : xhr.responseText;
options.success(data);
}
} : function() {},
onFailure: options.error || function() {
},
onException: options.error || function() {
}
});
} else {
new Ajax.Request(uri, {
method: "get",
parameters: options.data,
onSuccess: function(xhr, header) {
if (options.success) {
var ct = xhr.getResponseHeader("content-type");
var xml = ct && ct.indexOf("xml") >= 0;
var data = xml ? xhr.responseXML : xhr.responseText;
options.success(data);
}
},
onFailure: options.error || function() {
},
onException: options.error || function() {
}
});
}
},
log: function(message, exception) {
if (typeof console != 'undefined' && console.log) console.log(message);
}
};

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/**
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the 'License'); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an 'AS IS' BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
var amq = org.activemq.Amq;
org.activemq.Chat = function() {
var last = '';
var user = null;
var chatTopic = 'topic://CHAT.DEMO';
var chat, join, joined, phrase, members, username = null;
var chatHandler = function(message) {
var type = message.getAttribute('type');
var from = message.getAttribute('from');
switch (type) {
// Incoming chat message
case 'chat' : {
var text = message.childNodes[0].data;
if (from == last) from = '...';
else {
last = from;
from += ':';
}
chat.innerHTML += '<span class=\'from\'>' + from + '&nbsp;</span><span class=\'text\'>' + text + '</span><br/>';
break;
}
// Incoming ping request, add the person's name to your list.
case 'ping' : {
members.innerHTML += '<span class="member">' + from + '</span><br/>';
break;
}
// someone new joined the chatroom, clear your list and
// broadcast your name to all users.
case 'join' : {
members.innerHTML = '';
if (user != null)
amq.sendMessage(chatTopic, '<message type="ping" from="' + user + '"/>');
chat.innerHTML += '<span class="alert"><span class="from">' + from + '&nbsp;</span><span class="text">has joined the room!</span></span><br/>';
break;
}
// Screw you guys, I'm going home...
// When I (and everyone else) receive a leave message, we broadcast
// our own names in a ping in order to update everyone's list.
// todo: Make this more efficient by simply removing the person's name from the list.
case 'leave': {
members.innerHTML = '';
chat.innerHTML += '<span class="alert"><span class="from">' + from + '&nbsp;</span><span class="text">has left the room!</span></span><br/>';
// If we are the one that is leaving...
if (from == user) {
// switch the input form
join.className = '';
joined.className = 'hidden';
username.focus();
user = null;
amq.removeListener('chat', chatTopic);
}
if (user != null)
amq.sendMessage(chatTopic, '<message type="ping" from="' + user + '"/>');
break;
}
}
chat.scrollTop = chat.scrollHeight - chat.clientHeight;
};
var getKeyCode = function (ev) {
var keyc;
if (window.event) keyc = window.event.keyCode;
else keyc = ev.keyCode;
return keyc;
};
// Again, you would generally use your particular js library to attach
// event handlers. However, I wanted to remove the dependency on the
// behaviors.js file in the original code, and I am demonstrating a library
// that can work with a variety of js libraries, so we are going old-school.
var addEvent = function(obj, type, fn) {
if (obj.addEventListener)
obj.addEventListener(type, fn, false);
else if (obj.attachEvent) {
obj["e"+type+fn] = fn;
obj[type+fn] = function() { obj["e"+type+fn]( window.event ); }
obj.attachEvent( "on"+type, obj[type+fn] );
}
};
var initEventHandlers = function() {
addEvent(username, 'keyup', function(ev) {
var keyc = getKeyCode(ev);
if (keyc == 13 || keyc == 10) {
org.activemq.Chat.join();
return false;
}
return true;
});
addEvent(document.getElementById('joinB'), 'click', function() {
org.activemq.Chat.join();
return true;
});
addEvent(phrase, 'keyup', function(ev) {
var keyc = getKeyCode(ev);
if (keyc == 13 || keyc == 10) {
var text = phrase.value;
phrase.value = '';
org.activemq.Chat.chat(text);
return false;
}
return true;
});
addEvent(document.getElementById('sendB'), 'click', function() {
var text = phrase.value;
phrase.value = '';
org.activemq.Chat.chat(text);
});
addEvent(document.getElementById('leaveB'), 'click', function() {
org.activemq.Chat.leave();
return false;
});
};
return {
join: function() {
var name = username.value;
if (name == null || name.length == 0) {
alert('Please enter a username!');
} else {
user = name;
amq.addListener('chat', chatTopic, chatHandler);
join.className = 'hidden';
joined.className = '';
phrase.focus();
amq.sendMessage(chatTopic, '<message type="join" from="' + user + '"/>');
}
},
leave: function() {
amq.sendMessage(chatTopic, '<message type="leave" from="' + user + '"/>');
},
chat: function(text) {
if (text != null && text.length > 0) {
// TODO more encoding?
text = text.replace('<', '&lt;');
text = text.replace('>', '&gt;');
amq.sendMessage(chatTopic, '<message type="chat" from="' + user + '">' + text + '</message>');
}
},
init: function() {
join = document.getElementById('join');
joined = document.getElementById('joined');
chat = document.getElementById('chat');
members = document.getElementById('members');
username = document.getElementById('username');
phrase = document.getElementById('phrase');
if (join.className == 'hidden' && joined.className == 'hidden') {
join.className = '';
joined.className = 'hidden';
username.focus();
}
initEventHandlers();
}
}
}();

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/*!
* jQuery JavaScript Library v1.4.2
* http://jquery.com/
*
* Copyright 2010, John Resig
* Dual licensed under the MIT or GPL Version 2 licenses.
* http://jquery.org/license
*
* Includes Sizzle.js
* http://sizzlejs.com/
* Copyright 2010, The Dojo Foundation
* Released under the MIT, BSD, and GPL Licenses.
*
* Date: Sat Feb 13 22:33:48 2010 -0500
*/
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