/*
* 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.classpool.plugins.jbosscl;
import java.security.AccessController;
import java.security.PrivilegedActionException;
import java.security.PrivilegedExceptionAction;
import java.util.ArrayList;
import java.util.Collections;
import java.util.LinkedHashSet;
import java.util.List;
import java.util.Set;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;
import javassist.ClassPool;
import javassist.CtClass;
import javassist.NotFoundException;
import org.jboss.classloader.spi.ParentPolicy;
import org.jboss.classloading.spi.dependency.Module;
import org.jboss.classpool.base.BaseClassPool;
import org.jboss.classpool.base.BaseClassPoolDomain;
import org.jboss.classpool.domain.ClassPoolDomain;
import org.jboss.classpool.helpers.ClassLoaderUtils;
import org.jboss.classpool.plugins.DelegatingClassPool;
import org.jboss.classpool.spi.ClassPoolRepository;
/**
* JBoss Cl class pool domain.
*
* @author <a href="kabir.khan@jboss.com">Kabir Khan</a>
* @author <a href="mailto:flavia.rainone@jboss.com">Flavia Rainone</a>
* @version $Revision: 99173 $
*/
class JBossClClassPoolDomain extends BaseClassPoolDomain
{
private final ConcurrentMap<String, Set<DelegatingClassPool>> poolsByPackage = new ConcurrentHashMap<String, Set<DelegatingClassPool>>();
private final DomainRegistry registry;
public JBossClClassPoolDomain(String domainName, ParentPolicy parentPolicy, DomainRegistry registry)
{
super(domainName,
new JBossClParentDelegationStrategy(parentPolicy,
JBossClClassPoolToClassPoolDomainAdaptorFactory.getInstance())
);
this.registry = registry;
}
public JBossClClassPoolDomain(String domainName, ClassPoolDomain parent, ParentPolicy parentPolicy, DomainRegistry registry)
{
super(domainName,
new JBossClParentDelegationStrategy(
parent,
parentPolicy,
JBossClClassPoolToClassPoolDomainAdaptorFactory.getInstance())
);
this.registry = registry;
}
public JBossClClassPoolDomain(String domainName, ClassPool parent, ParentPolicy parentPolicy, DomainRegistry registry)
{
super(domainName,
new JBossClParentDelegationStrategy(
parent,
parentPolicy,
JBossClClassPoolToClassPoolDomainAdaptorFactory.getInstance())
);
this.registry = registry;
}
void setupPoolsByPackage(DelegatingClassPool pool)
{
if (pool instanceof JBossClDelegatingClassPool == false)
{
throw new IllegalStateException("Not an instance of JBossClDelegatingClassPool: " + pool.getClass().getName());
}
Module module = getModuleForPool(pool);
boolean trace = logger.isTraceEnabled();
lockWrite();
try
{
for (String pkg : module.getPackageNames())
{
Set<DelegatingClassPool> pools = poolsByPackage.get(pkg);
if (pools == null)
{
pools = new LinkedHashSet<DelegatingClassPool>();
Set<DelegatingClassPool> old = poolsByPackage.putIfAbsent(pkg, pools);
if (old != null)
pools = old;
}
pools.add(pool);
if (trace) logger.trace(this + " adding package " + pkg + " for pool " + pool);
}
}
finally
{
unlockWrite();
}
}
@Override
public void removeClassPool(DelegatingClassPool pool)
{
super.removeClassPool(pool);
Module module = getModuleForPool(pool);
boolean trace = logger.isTraceEnabled();
lockWrite();
try
{
for (String pkg : module.getPackageNames())
{
Set<DelegatingClassPool> pools = poolsByPackage.get(pkg);
if (pools != null)
{
pools.remove(pool);
if (pools.size() == 0)
{
poolsByPackage.remove(pkg);
if (trace) logger.trace(this + " removing package " + pkg + " for pool " + pool);
}
}
}
}
finally
{
unlockWrite();
}
}
@Override
public CtClass getCachedOrCreate(DelegatingClassPool initiatingPool, String classname, String resourceName, boolean create, boolean trace)
{
if (trace) logger.trace(this + " looking for " + classname);
CtClass clazz = getCheckPrimitive(classname);
if (clazz != null)
{
if (trace) logger.trace(this + " isPrimitive " + classname);
}
else
{
Module module = getModuleForPool(initiatingPool);
if (module != null && module.isImportAll())
{
//Use the old "big ball of mud" model
if (trace) logger.trace(this + " isImportAll");
return super.getCachedOrCreate(initiatingPool, classname, resourceName, create, trace);
}
//Attempt OSGi style loading
if (isParentBefore(classname))
{
if (trace) logger.trace(this + " checking parent first for " + classname);
clazz = getCachedOrCreateFromParent(null, classname, resourceName, create, trace);
}
//Check imports first
if (clazz == null && module != null)
{
if (trace) logger.trace(this + " checking imports for " + classname);
clazz = getCtClassFromModule(module, classname, trace);
}
//Try to check the initiating pool itself
if (clazz == null && initiatingPool != null)
{
if (trace) logger.trace(this + " checking pool " + initiatingPool + " locally for " + classname);
clazz = initiatingPool.loadLocally(classname, resourceName, create);
}
if (clazz == null && isParentAfter(classname))
{
if (trace) logger.trace(this + " checking parent last for " + classname);
clazz = getCachedOrCreateFromParent(null, classname, resourceName, create, trace);
}
}
if (trace) logger.trace(this + " found " + classname + " in " + (clazz == null ? "null" : clazz.getClassPool()));
return clazz;
}
private CtClass getCheckPrimitive(String classname)
{
if (ClassLoaderUtils.isPrimitiveType(classname))
{
try
{
return ClassPool.getDefault().get(classname);
}
catch(NotFoundException e)
{
throw new RuntimeException(classname + " should have been a primitive", e);
}
}
return null;
}
private Module getModuleForPool(DelegatingClassPool pool)
{
if (pool == null)
{
return null;
}
Module module = ((JBossClDelegatingClassPool)pool).getModule();
if (logger.isTraceEnabled()) logger.trace(this + " got module " + module + " for " + pool);
return module;
}
@Override
protected List<DelegatingClassPool> getPoolsForClassName(String classname)
{
String packageName = ClassLoaderUtils.getPackageName(classname);
Set<DelegatingClassPool> poolSet = poolsByPackage.get(packageName);
lockRead();
try
{
return (poolSet == null) ? Collections.<DelegatingClassPool>emptyList() : new ArrayList<DelegatingClassPool>(poolSet);
}
finally
{
unlockRead();
}
}
private CtClass getCtClassFromModule(final Module module, final String classname, boolean trace)
{
Module found = null;
try
{
found = AccessController.doPrivileged(new PrivilegedExceptionAction<Module>()
{
public Module run() throws Exception
{
return module.getModuleForClass(ClassLoaderUtils.stripArrayFromClassName(classname));
}
});
}
catch (PrivilegedActionException e)
{
if (e.getCause() instanceof ClassNotFoundException == false)
{
throw new RuntimeException(e);
}
}
if (trace) logger.trace(this + " module for " + classname + " " + found);
if (found == null || found == module)
{
return null;
}
ClassLoader foundLoader = registry.getClassLoader(found);
ClassPool pool = ClassPoolRepository.getInstance().registerClassLoader(foundLoader);
try
{
if (pool instanceof BaseClassPool)
{
return getCachedOrCreateFromPool((BaseClassPool)pool, classname, true, trace);
}
return pool.get(classname);
}
catch(NotFoundException ignore)
{
}
return null;
}
}