/*
* 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.aop.domain;
import org.jboss.aop.AspectManager;
import org.jboss.aop.advice.AspectDefinition;
import org.jboss.mx.loading.HeirarchicalLoaderRepository3;
import org.jboss.mx.loading.LoaderRepository;
import org.jboss.mx.loading.RepositoryClassLoader;
/**
* A domain that is used for scoped classloaders
*
* @author <a href="kabir.khan@jboss.com">Kabir Khan</a>
* @author adrian@jboss.org
* @version $Revision: 1.1 $
*/
public class ScopedRepositoryClassLoaderDomain extends ScopedClassLoaderDomain
{
public ScopedRepositoryClassLoaderDomain(ClassLoader loader, String name, boolean parentDelegation, AspectManager manager, boolean parentFirst)
{
super(loader, name, parentDelegation, manager, parentFirst);
}
// FIXME: JBAOP-107 REMOVE THIS HACK
public boolean isValid()
{
RepositoryClassLoader cl = (RepositoryClassLoader) getClassLoader();
if (cl == null)
return false;
return cl.getLoaderRepository() != null;
}
protected Object getPerVmAspectWithNoParentDelegation(String def)
{
Object aspect = myPerVMAspects.get(def);
if (aspect != null)
{
return aspect;
}
aspect = super.getSuperPerVmAspect(def);
if (aspect != null)
{
synchronized(myPerVMAspects)
{
LoaderRepository loadingRepository = getAspectRepository(aspect);
LoaderRepository myRepository = getScopedRepository();
if (loadingRepository == myRepository)
{
//The parent does not load this class
myPerVMAspects.put(def, aspect);
}
else
{
//The class has been loaded by a parent classloader, find out if we also have a copy
try
{
Class<?> clazz = myRepository.loadClass(aspect.getClass().getName());
if (clazz == aspect.getClass())
{
notMyPerVMAspects.put(def, Boolean.TRUE);
}
else
{
//We have a different version of the class deployed
AspectDefinition aspectDefinition = getAspectDefinition(def);
//Override the classloader to create the aspect instance
aspect = createPerVmAspect(def, aspectDefinition, getClassLoader());
myPerVMAspects.put(def, aspect);
}
}
catch (ClassNotFoundException e)
{
throw new RuntimeException(e);
}
}
}
}
return aspect;
}
private LoaderRepository getAspectRepository(Object aspect)
{
ClassLoader cl = aspect.getClass().getClassLoader();
ClassLoader parent = cl;
while (parent != null)
{
if (parent instanceof RepositoryClassLoader)
{
return ((RepositoryClassLoader)parent).getLoaderRepository();
}
parent = parent.getParent();
}
return null;
}
private HeirarchicalLoaderRepository3 getScopedRepository()
{
ClassLoader classloader = getClassLoader();
if (classloader == null)
throw new IllegalStateException("ClassLoader no longer exists: " + classLoaderString);
if (classloader instanceof RepositoryClassLoader == false)
throw new IllegalStateException("ClassLoader is not an instanceof RepositoryClassLoader " + classLoaderString);
RepositoryClassLoader repositoryClassLoader = (RepositoryClassLoader) classloader;
LoaderRepository loaderRepository = repositoryClassLoader.getLoaderRepository();
if (loaderRepository == null)
throw new IllegalStateException("ClassLoader has been undeployed: " + classLoaderString);
if (loaderRepository instanceof HeirarchicalLoaderRepository3 == false)
throw new IllegalStateException("Repository " + loaderRepository + " for classlaoder " + classLoaderString + " is not an HeirarchicalLoaderRepository3");
return (HeirarchicalLoaderRepository3) loaderRepository;
}
}