/*
* 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.microcontainer.beans;
import org.jboss.aop.Advisor;
import org.jboss.aop.InstanceAdvisor;
import org.jboss.aop.advice.AspectFactory;
import org.jboss.aop.joinpoint.Joinpoint;
import org.jboss.beans.metadata.plugins.AbstractClassLoaderMetaData;
import org.jboss.beans.metadata.plugins.AbstractValueMetaData;
import org.jboss.beans.metadata.plugins.factory.GenericBeanFactory;
import org.jboss.beans.metadata.spi.ValueMetaData;
import org.jboss.beans.metadata.spi.factory.BeanFactory;
import org.jboss.kernel.plugins.config.Configurator;
import org.jboss.kernel.spi.dependency.KernelControllerContext;
import org.jboss.kernel.spi.dependency.KernelControllerContextAware;
import org.jboss.logging.Logger;
import org.jboss.util.xml.XmlLoadable;
import org.w3c.dom.Element;
/**
*
* @author <a href="kabir.khan@jboss.com">Kabir Khan</a>
* @version $Revision: 1.1 $
*/
public class DelegatingBeanAspectFactory implements AspectFactory, KernelControllerContextAware, BeanFactoryAwareAspectFactory
{
private static final Logger log = Logger.getLogger(GenericBeanAspectFactory.class);
protected BeanFactory factory;
protected String name;
protected Element element;
protected KernelControllerContext context;
protected AspectFactory aspectFactory;
public DelegatingBeanAspectFactory(String name, BeanFactory factory, Element element)
{
this.name = name;
this.factory = factory;
this.element = element;
}
public void setKernelControllerContext(KernelControllerContext context)
{
this.context = context;
}
public void unsetKernelControllerContext(KernelControllerContext context) throws Exception
{
this.context = null;
}
public void setBeanFactory(BeanFactory factory)
{
this.factory = factory;
}
public String getName()
{
return name;
}
public Object createPerVM()
{
AspectFactory factory = doCreate();
return factory.createPerVM();
}
public Object createPerClass(Advisor advisor)
{
AspectFactory factory = doCreate();
return factory.createPerClass(advisor);
}
public Object createPerInstance(Advisor advisor, InstanceAdvisor instanceAdvisor)
{
AspectFactory factory = doCreate();
return factory.createPerInstance(advisor, instanceAdvisor);
}
public Object createPerJoinpoint(Advisor advisor, Joinpoint jp)
{
AspectFactory factory = doCreate();
return factory.createPerJoinpoint(advisor, jp);
}
public Object createPerJoinpoint(Advisor advisor, InstanceAdvisor instanceAdvisor, Joinpoint jp)
{
AspectFactory factory = doCreate();
return factory.createPerJoinpoint(advisor, instanceAdvisor, jp);
}
protected synchronized AspectFactory doCreate()
{
try
{
if (aspectFactory == null)
{
log.debug("Creating advice " + name);
PushedClassLoaderMetaData pcmd = null;
if (((GenericBeanFactory)factory).getClassLoader() == null)
{
pcmd = new PushedClassLoaderMetaData();
((GenericBeanFactory)factory).setClassLoader(pcmd);
}
Object object = null;
try
{
//Try without looking at the context first which is what shold be used when running scoped in AS
object = factory.createBean();
}
catch(Throwable t)
{
if (pcmd != null)
{
pcmd.setLookAtContext(true);
}
else
{
throw new RuntimeException(t);
}
object = factory.createBean();
}
aspectFactory = (AspectFactory)object;
if (aspectFactory instanceof XmlLoadable)
{
((XmlLoadable)aspectFactory).importXml(element);
}
}
return aspectFactory;
}
catch (Throwable throwable)
{
throw new RuntimeException(throwable);
}
}
/**
* Gets any classloaders for the thread
*/
private class PushedClassLoaderMetaData extends AbstractClassLoaderMetaData
{
/** The serialVersionUID */
private static final long serialVersionUID = 1L;
boolean lookAtContext;
void setLookAtContext(boolean look)
{
lookAtContext = look;
}
@Override
public ValueMetaData getClassLoader()
{
ClassLoader loader = null;
if (loader == null)
{
if (lookAtContext && context != null)
{
try
{
loader = context.getClassLoader();
}
catch (Throwable t)
{
log.trace("Unable to retrieve classloader from " + context);
}
if (loader == null)
{
try
{
loader = Configurator.getClassLoader(((GenericBeanFactory)factory).getClassLoader());
}
catch (Throwable e)
{
log.trace("Unable to retrieve classloader from " + factory);
}
}
}
return loader != null ? new AbstractValueMetaData(loader) : null;
}
else
{
return new AbstractValueMetaData(loader);
}
}
}
}