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1   /*
2    * $Id$
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.api.processor;
12  
13  import org.mule.api.MuleEvent;
14  import org.mule.api.source.MessageSource;
15  
16  /**
17   * <p>
18   * Processes {@link MuleEvent}'s intercepting another listener
19   * {@link MessageProcessor}. It is the InterceptingMessageProcessor's responsibility
20   * to invoke the next {@link MessageProcessor}.
21   * </p>
22   * Although not normal, it is valid for the <i>listener</i> MessageProcessor to be
23   * <i>null</i> and implementations should handle this case.
24   * 
25   * @since 3.0
26   */
27  public interface InterceptingMessageProcessor extends MessageProcessor, MessageSource
28  {
29  }