Coverage Report - org.mule.routing.inbound.IdempotentSecureHashReceiver
 
Classes in this File Line Coverage Branch Coverage Complexity
IdempotentSecureHashReceiver
0%
0/9
N/A
6
 
 1  
 /*
 2  
  * $Id: IdempotentSecureHashReceiver.java 7976 2007-08-21 14:26:13Z 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.routing.inbound;
 12  
 
 13  
 import org.mule.transformers.simple.ByteArrayToHexString;
 14  
 import org.mule.transformers.simple.SerializableToByteArray;
 15  
 import org.mule.umo.MessagingException;
 16  
 import org.mule.umo.UMOEvent;
 17  
 import org.mule.umo.routing.RoutingException;
 18  
 import org.mule.umo.transformer.TransformerException;
 19  
 
 20  
 import java.security.MessageDigest;
 21  
 import java.security.NoSuchAlgorithmException;
 22  
 
 23  
 /**
 24  
  * <code>IdempotentSecureHashReceiver</code> ensures that only unique messages are
 25  
  * received by a component. It does this by calculating the SHA-256 hash of the
 26  
  * message itself. This provides a value with an infinitesimally small chance of a
 27  
  * collision. This can be used to filter message duplicates. Please keep in mind that
 28  
  * the hash is calculated over the entire byte array representing the message, so any
 29  
  * leading or trailing spaces or extraneous bytes (like padding) can produce
 30  
  * different hash values for the same semantic message content. Care should be taken
 31  
  * to ensure that messages do not contain extraneous bytes. This class is useful when
 32  
  * the message does not support unique identifiers. This implementation provides for
 33  
  * a persistent store of message hash values via the underlying file system and is
 34  
  * suitable in failover environments.
 35  
  */
 36  
 
 37  0
 public class IdempotentSecureHashReceiver extends IdempotentReceiver
 38  
 {
 39  
     private static final String messageDigestAlgorithm = "SHA-256";
 40  
 
 41  0
     private final SerializableToByteArray objectToByteArray = new SerializableToByteArray();
 42  0
     private final ByteArrayToHexString byteArrayToHexString = new ByteArrayToHexString();
 43  
 
 44  
     // @Override
 45  
     protected Object getIdForEvent(UMOEvent event) throws MessagingException
 46  
     {
 47  
         try
 48  
         {
 49  0
             MessageDigest md = MessageDigest.getInstance(messageDigestAlgorithm);
 50  0
             return byteArrayToHexString.transform(md.digest((byte[]) objectToByteArray.transform(event.getMessage()
 51  
                 .getPayload())));
 52  
         }
 53  0
         catch (NoSuchAlgorithmException nsa)
 54  
         {
 55  0
             throw new RoutingException(event.getMessage(), event.getEndpoint(), nsa);
 56  
         }
 57  0
         catch (TransformerException te)
 58  
         {
 59  0
             throw new RoutingException(event.getMessage(), event.getEndpoint(), te);
 60  
         }
 61  
     }
 62  
 }