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1   /*
2    * $Id: NullComponent.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.component.simple;
12  
13  import org.mule.api.MuleEventContext;
14  import org.mule.api.lifecycle.Callable;
15  
16  /**
17   * <code>NullComponent</code> is a service that is used as a placeholder. This
18   * implementation will throw an exception if a message is received for it.
19   */
20  public class NullComponent implements Callable
21  {
22  
23      public Object onCall(MuleEventContext context) throws Exception
24      {
25          throw new UnsupportedOperationException("This service cannot receive messages. Service is: "
26                                                  + context.getFlowConstruct().getName());
27      }
28  
29  }