/*
* JBoss, Home of Professional Open Source.
* Copyright 2008, Red Hat Middleware LLC, and individual contributors
* as indicated by the @author tags. See the copyright.txt file 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.managed.plugins.advice;
import java.util.Arrays;
import org.jboss.aop.joinpoint.Invocation;
import org.jboss.aop.joinpoint.MethodInvocation;
import org.jboss.logging.Logger;
/**
* TraceAdvice.
*
* @author <a href="adrian@jboss.com">Adrian Brock</a>
* @version $Revision: 82920 $
*/
public class TraceAdvice
{
/** The log */
private static final Logger log = Logger.getLogger(TraceAdvice.class);
/**
* Interceptor
*
* @param invocation the invocation
* @return the result
* @throws Throwable for any problem
*/
public Object invoke(Invocation invocation) throws Throwable
{
boolean trace = log.isTraceEnabled();
if (trace)
logMethod(false, invocation, null, null);
Throwable e = null;
Object result = null;
try
{
result = invocation.invokeNext();
return result;
}
catch (Throwable t)
{
e = t;
throw t;
}
finally
{
logMethod(true, invocation, result, e);
}
}
private void logMethod(boolean beforeAfter, Invocation invocation, Object result, Throwable t)
{
MethodInvocation mi = (MethodInvocation) invocation;
StringBuilder builder = new StringBuilder();
Object target = mi.getTargetObject();
builder.append(target.getClass().getSimpleName());
builder.append('@');
builder.append(System.identityHashCode(target));
if (beforeAfter == false)
builder.append(" before ");
else
builder.append(" after ");
builder.append(mi.getActualMethod().getName());
if (beforeAfter == false)
{
builder.append(" params=");
builder.append(Arrays.asList(mi.getArguments()));
}
else if (t == null)
{
builder.append(" result=");
builder.append(result);
}
if (t != null)
builder.append(" ended in error:");
log.trace(builder.toString(), t);
}
}