org.jboss.mx.util.JMXExceptionDecoder Maven / Gradle / Ivy
/*
* JBoss, Home of Professional Open Source
* Copyright 2005, JBoss Inc., and individual contributors as indicated
* by the @authors tag. See the copyright.txt in the distribution for a
* full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jboss.mx.util;
import javax.management.*;
/**
* A simple helper to rethrow and/or decode those pesky
* JMX exceptions.
*
* @author Jason Dillon
* @version $Revision: 37459 $
*/
public class JMXExceptionDecoder
{
/**
* Attempt to decode the given Throwable. If it
* is a container JMX exception, then the target
* is returned. Otherwise the argument is returned.
*/
public static Throwable decode(final Throwable t)
{
Throwable result = t;
while (true)
{
if (result instanceof MBeanException)
result = ((MBeanException) result).getTargetException();
else if (result instanceof ReflectionException)
result = ((ReflectionException) result).getTargetException();
else if (result instanceof RuntimeOperationsException)
result = ((RuntimeOperationsException) result).getTargetException();
else if (result instanceof RuntimeMBeanException)
result = ((RuntimeMBeanException) result).getTargetException();
else if (result instanceof RuntimeErrorException)
result = ((RuntimeErrorException) result).getTargetError();
else
// can't decode
break;
}
return result;
}
/** Unwrap a possibly nested jmx exception down to the last
* JMException || JMRuntimeException.
*
* @param ex the exception to unwrap
* @return A JMException || JMRuntimeException if ex was of this type, or
* ex if it was not.
*/
public static Throwable decodeToJMXException(final Throwable ex)
{
Throwable jmxEx = ex;
Throwable lastJmxEx = ex;
while( jmxEx instanceof JMException || jmxEx instanceof JMRuntimeException)
{
lastJmxEx = jmxEx;
jmxEx = decode(jmxEx);
if( jmxEx == lastJmxEx )
break;
}
return lastJmxEx;
}
/**
* Decode and rethrow the given Throwable. If it
* is a container JMX exception, then the target
* is thrown. Otherwise the argument is thrown.
*/
public static void rethrow(final Exception e)
throws Exception
{
Throwable t = decode(e);
if (t instanceof Exception)
throw (Exception) t;
else
throw (Error) t;
}
}