/*
* Copyright (c) MuleSoft, Inc. All rights reserved. http://www.mulesoft.com
* The software in this package is published under the terms of the CPAL v1.0
* license, a copy of which has been included with this distribution in the
* LICENSE.txt file.
*/
package org.mule.keygenerator;
import org.mule.api.MuleEvent;
import org.mule.api.MuleEventKeyGenerator;
import org.mule.util.StringUtils;
import java.io.NotSerializableException;
import java.io.Serializable;
import java.security.MessageDigest;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Implements {@link org.mule.api.MuleEventKeyGenerator} applying SHA-256 digest to the event's
* message payload.
*/
public class SHA256MuleEventKeyGenerator implements MuleEventKeyGenerator
{
private static final Logger logger = LoggerFactory.getLogger(SHA256MuleEventKeyGenerator.class);
public Serializable generateKey(MuleEvent event) throws NotSerializableException
{
try
{
byte[] bytesOfMessage = event.getMessageAsBytes();
MessageDigest md = MessageDigest.getInstance("SHA-256");
String key = StringUtils.toHexString(md.digest(bytesOfMessage));
if (logger.isDebugEnabled())
{
logger.debug(String.format("Generated key for event: %s key: %s", event, key));
}
return key;
}
catch (Exception e)
{
// TODO: The exception may not necessarily be caused by a serialization problem, but we still throw
// NotSerializableException to keep backwards compatibility. The interface needs to be changed.
NotSerializableException notSerializableException = new NotSerializableException(e.getMessage());
notSerializableException.initCause(e);
throw notSerializableException;
}
}
}