/*
* JBoss, Home of Professional Open Source.
* Copyright 2006, 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.aspects.logging;
import org.jboss.aop.joinpoint.ConstructorInvocation;
import org.jboss.aop.joinpoint.FieldReadInvocation;
import org.jboss.aop.joinpoint.FieldWriteInvocation;
import org.jboss.aop.joinpoint.MethodInvocation;
import org.jboss.logging.Logger;
import java.util.Arrays;
/**
* Logs invocations.
*
* @author <a href="mailto:adrian@jboss.org">Adrian Brock</a>.
* @version $Revision: 57186 $
*/
public final class CallLoggingInterceptor
implements org.jboss.aop.advice.Interceptor, LoggingConstants
{
protected Logger log = Logger.getLogger(this.getClass());
public String getName() { return "CallLoggingInterceptor"; }
public Object invoke(org.jboss.aop.joinpoint.Invocation invocation) throws Throwable
{
boolean callLogging = log.isDebugEnabled();
if (callLogging)
callLogging = Boolean.valueOf((String)invocation.getMetaData(LOGGING, CALL_LOGGING)).booleanValue();
if (callLogging)
log.debug("Invoking: " + dumpInvocation(invocation));
Object response = null;
try
{
response = invocation.invokeNext();
return response;
}
catch (Throwable t)
{
if (callLogging)
log.debug("Throwing: " + dumpInvocation(invocation), t);
throw t;
}
finally
{
if (callLogging)
log.debug("Response: " + dumpInvocationResponse(response) + " for " + dumpInvocation(invocation));
}
}
/**
* Display useful information about the invocation
* @todo improve this, probably controlled by meta data
* @param invocation the invocation
*/
public String dumpInvocation(org.jboss.aop.joinpoint.Invocation invocation)
{
StringBuffer buffer = new StringBuffer();
if (invocation instanceof MethodInvocation)
{
org.jboss.aop.joinpoint.MethodInvocation methodInvocation = (org.jboss.aop.joinpoint.MethodInvocation)invocation;
buffer.append("Method@").append(System.identityHashCode(invocation)).append("{");
buffer.append("method=").append(methodInvocation.getMethod());
// TODO fix this, null arguments screws this up
// buffer.append(" args=").append(Arrays.asList(methodInvocation.arguments));
}
else if (invocation instanceof FieldReadInvocation)
{
org.jboss.aop.joinpoint.FieldReadInvocation fieldInvocation = (org.jboss.aop.joinpoint.FieldReadInvocation)invocation;
buffer.append("FieldRead@").append(System.identityHashCode(invocation)).append("{");
buffer.append("field=").append(fieldInvocation.getField());
}
else if (invocation instanceof FieldWriteInvocation)
{
org.jboss.aop.joinpoint.FieldWriteInvocation fieldInvocation = (org.jboss.aop.joinpoint.FieldWriteInvocation)invocation;
buffer.append("FieldWrite@").append(System.identityHashCode(invocation)).append("{");
buffer.append("field=").append(fieldInvocation.getField());
buffer.append(" value=").append(fieldInvocation.getValue());
}
else if (invocation instanceof ConstructorInvocation)
{
org.jboss.aop.joinpoint.ConstructorInvocation cInvocation = (org.jboss.aop.joinpoint.ConstructorInvocation)invocation;
buffer.append("Construct@").append(System.identityHashCode(invocation)).append("{");
buffer.append("constructor=").append(cInvocation.getConstructor());
buffer.append(" args=").append(Arrays.asList(cInvocation.getArguments()));
}
else
{
return "Unknown " + invocation;
}
buffer.append("}");
return buffer.toString();
}
/**
* Display useful information about the invocation response
* @todo improve this, probably controlled by meta data
* @param invocation the invocation
*/
public String dumpInvocationResponse(Object response)
{
if (response == null)
return "null";
StringBuffer buffer = new StringBuffer();
buffer.append(response);
return buffer.toString();
}
}
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