| /** |
| * 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 |
| // |
| var amq = |
| { |
| // The URI of the MessageListenerServlet |
| uri: '/amq', |
| |
| // Polling. Set to true (default) if waiting poll for messages is needed |
| poll: true, |
| |
| // Poll delay. if set to positive integer, this is the time to wait in ms before |
| // sending the next poll after the last completes. |
| _pollDelay: 0, |
| |
| _first: true, |
| _pollEvent: function(first) {}, |
| _handlers: new Array(), |
| |
| _messages:0, |
| _messageQueue: '', |
| _queueMessages: 0, |
| |
| _messageHandler: function(request) |
| { |
| try |
| { |
| if (request.status == 200) |
| { |
| var response = request.responseXML.getElementsByTagName("ajax-response"); |
| if (response != null && response.length == 1) |
| { |
| for ( var i = 0 ; i < response[0].childNodes.length ; i++ ) |
| { |
| var responseElement = response[0].childNodes[i]; |
| |
| // only process nodes of type element..... |
| if ( responseElement.nodeType != 1 ) |
| continue; |
| |
| var id = responseElement.getAttribute('id'); |
| |
| |
| var handler = amq._handlers[id]; |
| if (handler!=null) |
| { |
| for (var j = 0; j < responseElement.childNodes.length; j++) |
| { |
| handler(responseElement.childNodes[j]); |
| } |
| } |
| } |
| } |
| } |
| } |
| catch(e) |
| { |
| alert(e); |
| } |
| }, |
| |
| startBatch: function() |
| { |
| amq._queueMessages++; |
| }, |
| |
| endBatch: function() |
| { |
| amq._queueMessages--; |
| if (amq._queueMessages==0 && amq._messages>0) |
| { |
| var body = amq._messageQueue; |
| amq._messageQueue=''; |
| amq._messages=0; |
| amq._queueMessages++; |
| new Ajax.Request(amq.uri, { method: 'post', postBody: body, onSuccess: amq.endBatch}); |
| } |
| }, |
| |
| _pollHandler: function(request) |
| { |
| amq.startBatch(); |
| try |
| { |
| amq._messageHandler(request); |
| amq._pollEvent(amq._first); |
| amq._first=false; |
| } |
| catch(e) |
| { |
| alert(e); |
| } |
| amq.endBatch(); |
| |
| if (amq._pollDelay>0) |
| setTimeout('amq._sendPoll()',amq._pollDelay); |
| else |
| amq._sendPoll(); |
| }, |
| |
| _sendPoll: function(request) |
| { |
| new Ajax.Request(amq.uri, { method: 'get', onSuccess: amq._pollHandler }); |
| }, |
| |
| // Add a function that gets called on every poll response, after all received |
| // messages have been handled. The poll handler is past a boolean that indicates |
| // if this is the first poll for the page. |
| addPollHandler : function(func) |
| { |
| var old = amq._pollEvent; |
| amq._pollEvent = function(first) |
| { |
| old(first); |
| func(first); |
| } |
| }, |
| |
| // Send a JMS message to a destination (eg topic://MY.TOPIC). Message should be xml or encoded |
| // xml content. |
| sendMessage : function(destination,message) |
| { |
| amq._sendMessage(destination,message,'send'); |
| }, |
| |
| // Listen on a channel or topic. handler must be a function taking a message arguement |
| addListener : function(id,destination,handler) |
| { |
| amq._handlers[id]=handler; |
| amq._sendMessage(destination,id,'listen'); |
| }, |
| |
| // remove Listener from channel or topic. |
| removeListener : function(id,destination) |
| { |
| amq._handlers[id]=null; |
| amq._sendMessage(destination,id,'unlisten'); |
| }, |
| |
| _sendMessage : function(destination,message,type) |
| { |
| if (amq._queueMessages>0) |
| { |
| if (amq._messages==0) |
| { |
| amq._messageQueue='destination='+destination+'&message='+message+'&type='+type; |
| } |
| else |
| { |
| amq._messageQueue+='&d'+amq._messages+'='+destination+'&m'+amq._messages+'='+message+'&t'+amq._messages+'='+type; |
| } |
| amq._messages++; |
| } |
| else |
| { |
| amq.startBatch(); |
| new Ajax.Request(amq.uri, { method: 'post', postBody: 'destination='+destination+'&message='+message+'&type='+type, onSuccess: amq.endBatch}); |
| } |
| }, |
| |
| _startPolling : function() |
| { |
| if (amq.poll) |
| new Ajax.Request(amq.uri, { method: 'get', parameters: 'timeout=10', onSuccess: amq._pollHandler }); |
| } |
| }; |
| |
| Behaviour.addLoadEvent(amq._startPolling); |
| |
| function getKeyCode(ev) |
| { |
| var keyc; |
| if (window.event) |
| keyc=window.event.keyCode; |
| else |
| keyc=ev.keyCode; |
| return keyc; |
| } |