/*
* 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.aop.asintegration.jboss4;
import java.util.Map;
import java.util.WeakHashMap;
import org.jboss.aop.AspectManager;
import org.jboss.aop.Domain;
import org.jboss.aop.classpool.AOPClassLoaderScopingPolicy;
import org.jboss.aop.classpool.AOPClassPoolRepository;
import org.jboss.aop.domain.DomainInitializer;
import org.jboss.aop.domain.ScopedRepositoryClassLoaderDomain;
import org.jboss.deployers.vfs.spi.structure.VFSDeploymentUnit;
import org.jboss.logging.Logger;
import org.jboss.mx.loading.HeirarchicalLoaderRepository3;
import org.jboss.mx.loading.RepositoryClassLoader;
/**
*
* @author <a href="kabir.khan@jboss.com">Kabir Khan</a>
* @version $Revision: 1.1 $
*/
public class RepositoryClassLoaderScopingPolicy implements AOPClassLoaderScopingPolicy, DomainInitializer
{
Logger log = Logger.getLogger(RepositoryClassLoaderScopingPolicy.class);
/** A map of domains by loader repository, maintaned by the top level AspectManager */
private Map<Object, Domain> scopedClassLoaderDomains = new WeakHashMap<Object, Domain>();
public Domain initializeDomain(VFSDeploymentUnit unit)
{
ClassLoader loader = unit.getClassLoader();
Domain domain = getDomain(loader, AspectManager.getTopLevelAspectManager());
AspectManager.instance().registerClassLoader(loader); //Ends up in classpool factory create method
return domain;
}
public synchronized Domain getDomain(ClassLoader classLoader, AspectManager parent)
{
ClassLoader scopedClassLoader = ifScopedDeploymentGetScopedParentUclForCL(classLoader);
if (scopedClassLoader != null)
{
Domain scopedManager = null;
synchronized (AOPClassPoolRepository.getInstance().getRegisteredCLs())
{
Object loaderRepository = getLoaderRepository(classLoader);
scopedManager = scopedClassLoaderDomains.get(loaderRepository);
// FIXME: JBAOP-107 REMOVE THIS HACK
if (scopedManager != null && scopedManager.isValid() == false)
{
scopedClassLoaderDomains.remove(loaderRepository);
scopedManager = null;
}
if (scopedManager == null)
{
scopedManager = getScopedClassLoaderDomain(scopedClassLoader, parent);
log.debug("Created domain " + scopedManager + " for scoped deployment on: " +
classLoader + "; identifying scoped ucl: " + scopedClassLoader);
scopedManager.setInheritsBindings(true);
scopedManager.setInheritsDeclarations(true);
scopedClassLoaderDomains.put(loaderRepository, scopedManager);
}
return scopedManager;
}
}
return null;
}
public Domain getTopLevelDomain(AspectManager parent)
{
ClassLoader classLoader = getTopLevelJBossClassLoader();
return getDomain(classLoader, parent);
}
//////////
private ClassLoader ifScopedDeploymentGetScopedParentUclForCL(ClassLoader loader)
{
ClassLoader parent = loader;
//The web classloader will be a child of the unified classloader - find out if that is scoped
while (parent != null)
{
if (ScopedRepositoryClassLoaderHelper.isScopedClassLoader(parent))
{
return parent;
}
if (parent instanceof RepositoryClassLoader)
{
//We were a repository classloader, but not scoped - ignore the parents like a sulky teenager
return null;
}
parent = parent.getParent();
}
return null;
}
private ClassLoader getTopLevelJBossClassLoader()
{
ClassLoader loader = Thread.currentThread().getContextClassLoader();
RepositoryClassLoader topRcl = null;
while (loader != null)
{
if (loader instanceof RepositoryClassLoader)
{
topRcl = (RepositoryClassLoader)loader;
}
loader = loader.getParent();
}
return topRcl;
}
private Domain getScopedClassLoaderDomain(ClassLoader cl, AspectManager parent)
{
boolean parentDelegation = true;
if (cl instanceof RepositoryClassLoader)
{
HeirarchicalLoaderRepository3 repository = (HeirarchicalLoaderRepository3)((RepositoryClassLoader)cl).getLoaderRepository();
parentDelegation = repository.getUseParentFirst();
}
String name = String.valueOf(System.identityHashCode(cl));
return new ScopedRepositoryClassLoaderDomain(cl, name, parentDelegation, parent, false);
}
private Object getLoaderRepository(ClassLoader loader)
{
ClassLoader cl = ifScopedDeploymentGetScopedParentUclForCL(loader);
if (cl != null)
{
return ((RepositoryClassLoader)cl).getLoaderRepository();
}
return null;
}
}