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1   /*
2    * $Id: AjaxReplyToHandler.java 22550 2011-07-24 22:03:52Z mike.schilling $
3    * --------------------------------------------------------------------------------------
4    * Copyright (c) MuleSoft, Inc.  All rights reserved.  http://www.mulesoft.com
5    *
6    * The software in this package is published under the terms of the CPAL v1.0
7    * license, a copy of which has been included with this distribution in the
8    * LICENSE.txt file.
9    */
10  package org.mule.transport.ajax;
11  
12  import org.mule.api.MuleEvent;
13  import org.mule.api.MuleException;
14  import org.mule.api.MuleMessage;
15  import org.mule.api.endpoint.EndpointBuilder;
16  import org.mule.api.endpoint.OutboundEndpoint;
17  import org.mule.api.transformer.Transformer;
18  import org.mule.api.transport.Connector;
19  import org.mule.endpoint.EndpointURIEndpointBuilder;
20  import org.mule.transport.DefaultReplyToHandler;
21  
22  import java.util.List;
23  
24  import org.cometd.Channel;
25  import org.cometd.Client;
26  import org.mortbay.cometd.AbstractBayeux;
27  
28  /**
29   * Handles the sending of sending result messages back to the client when the a replyTo 
30   * channel is specified in the client request.
31   */
32  public class AjaxReplyToHandler extends DefaultReplyToHandler
33  {
34      /**
35       * Serial version
36       */
37      private static final long serialVersionUID = 1L;
38      
39      public AjaxReplyToHandler(Connector connector)
40      {
41          super(connector.getMuleContext());
42          this.connector = connector;
43      }
44  
45      @Override
46      public void processReplyTo(MuleEvent event, MuleMessage returnMessage, Object replyTo) throws MuleException
47      {
48          AbstractBayeux bayeux = ((BayeuxAware)connector).getBayeux();
49          Channel channel = bayeux.getChannel(replyTo.toString(), false);
50          if(channel==null)
51          {
52              logger.warn("No ajax Channel: " + replyTo + ". Maybe the client unregistered interest.");
53              return;
54          }
55          
56          Object ret;
57          if(returnMessage.getExceptionPayload()!=null)
58          {
59              //If we are using RPC make sure we still send something back to the client so that the subscription is cancelled
60              ret = returnMessage.getExceptionPayload().getMessage();
61          }
62          else
63          {   
64              EndpointBuilder endpointBuilder = new EndpointURIEndpointBuilder(event.getMessageSourceURI().toString(), muleContext);
65              endpointBuilder.setConnector(connector);
66              OutboundEndpoint tempEndpoint = muleContext.getEndpointFactory().getOutboundEndpoint(endpointBuilder);
67              
68              List<Transformer> defaultTransportTransformers =  ((org.mule.transport.AbstractConnector) connector).getDefaultOutboundTransformers(tempEndpoint);
69              
70              returnMessage.applyTransformers(event, defaultTransportTransformers);
71  
72              ret = returnMessage.getPayload();
73          }
74          //Publish to interested clients
75          for (Client client : channel.getSubscribers())
76          {
77              channel.publish(client, ret, null);
78          }
79      }
80  }