View Javadoc

1   /*
2    * $Id: EnvelopeInterceptor.java 7963 2007-08-21 08:53:15Z dirk.olmes $
3    * --------------------------------------------------------------------------------------
4    * Copyright (c) MuleSource, Inc.  All rights reserved.  http://www.mulesource.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.interceptors;
12  
13  import org.mule.umo.Invocation;
14  import org.mule.umo.UMOException;
15  import org.mule.umo.UMOInterceptor;
16  import org.mule.umo.UMOMessage;
17  
18  /**
19   * <code>EnvelopeInterceptor</code> is an intercepter that will fire before and after an
20   * event is received.
21   */
22  public abstract class EnvelopeInterceptor implements UMOInterceptor
23  {
24      /**
25       * This method is invoked before the event is processed
26       * 
27       * @param invocation the message invocation being processed
28       */
29      public abstract void before(Invocation invocation) throws UMOException;
30  
31      /**
32       * This method is invoked after the event has been processed
33       * 
34       * @param invocation the message invocation being processed
35       */
36      public abstract void after(Invocation invocation) throws UMOException;
37  
38      public final UMOMessage intercept(Invocation invocation) throws UMOException
39      {
40          before(invocation);
41          UMOMessage message = invocation.execute();
42          invocation.setMessage(message);
43          after(invocation);
44          return message;
45      }
46  }