View Javadoc

1   /*
2    * $Id: SerializeAndEncodeSessionHandler.java 19191 2010-08-25 21:05:23Z tcarlson $
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  
11  package org.mule.session;
12  
13  import org.mule.api.MuleException;
14  import org.mule.api.MuleMessage;
15  import org.mule.api.MuleSession;
16  import org.mule.api.config.MuleProperties;
17  import org.mule.api.model.SessionException;
18  import org.mule.config.i18n.MessageFactory;
19  import org.mule.util.Base64;
20  
21  import java.io.IOException;
22  
23  import org.apache.commons.lang.SerializationUtils;
24  
25  /**
26   * A session handler used to store and retrieve session information on an
27   * event. The DefaultMuleSession information is stored as a header on the message (does not
28   * support Tcp, Udp, etc. unless the MuleMessage object is serialised across the
29   * wire). The session is stored in the "MULE_SESSION" property as Base64 encoded
30   * byte array.
31   */
32  public class SerializeAndEncodeSessionHandler extends SerializeOnlySessionHandler
33  {
34      @Override
35      public MuleSession retrieveSessionInfoFromMessage(MuleMessage message) throws MuleException
36      {
37          MuleSession session = null;
38          String serializedEncodedSession = message.getInboundProperty(MuleProperties.MULE_SESSION_PROPERTY);
39          
40          if (serializedEncodedSession != null)
41          {
42              byte[] serializedSession = Base64.decode(serializedEncodedSession);            
43              if (serializedSession != null)
44              {
45                  // TODO may need to use a classloader-aware org.mule.util.SerializationUtils.deserialize()
46                  session = (MuleSession) SerializationUtils.deserialize(serializedSession);
47              }
48          }
49          return session;
50      }
51  
52      @Override
53      public void storeSessionInfoToMessage(MuleSession session, MuleMessage message) throws MuleException
54      {        
55          byte[] serializedSession = SerializationUtils.serialize(removeNonSerializableProperties(session));
56          String serializedEncodedSession;
57          try
58          {
59              serializedEncodedSession = Base64.encodeBytes(serializedSession, Base64.DONT_BREAK_LINES);
60          }
61          catch (IOException e)
62          {
63              throw new SessionException(MessageFactory.createStaticMessage("Unable to serialize MuleSession"), e);
64          }
65          
66          if (logger.isDebugEnabled())
67          {
68              logger.debug("Adding serialized and base64-encoded Session header to message: " + serializedEncodedSession);
69          }
70          message.setOutboundProperty(MuleProperties.MULE_SESSION_PROPERTY, serializedEncodedSession);
71      }
72  }