/*
* 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.kernel.plugins.dependency;
import java.security.AccessControlContext;
import java.security.PrivilegedExceptionAction;
import org.jboss.beans.metadata.spi.BeanMetaData;
import org.jboss.dependency.plugins.action.SimpleControllerContextAction;
import org.jboss.dependency.spi.Controller;
import org.jboss.dependency.spi.ControllerContext;
import org.jboss.joinpoint.spi.Joinpoint;
import org.jboss.kernel.plugins.config.Configurator;
import org.jboss.kernel.spi.dependency.KernelController;
import org.jboss.kernel.spi.dependency.KernelControllerContext;
import org.jboss.kernel.spi.dependency.KernelControllerContextAware;
import org.jboss.kernel.spi.metadata.KernelMetaDataRepository;
import org.jboss.logging.Logger;
import org.jboss.metadata.spi.MetaData;
import org.jboss.metadata.spi.stack.MetaDataStack;
/**
* KernelControllerContextAction.
*
* @author <a href="adrian@jboss.com">Adrian Brock</a>
* @version $Revision: 73531 $
*/
public class KernelControllerContextAction extends SimpleControllerContextAction<KernelControllerContext>
{
/**
* Static log
*/
private static final Logger staticLog = Logger.getLogger(KernelControllerContextAction.class);
/**
* The log
*/
protected Logger log = Logger.getLogger(getClass());
/**
* Dispatch a joinpoint
*
* @param context the context
* @param joinpoint the joinpoint
* @return the result
* @throws Throwable for any error
*/
static Object dispatchJoinPoint(final KernelControllerContext context, final Joinpoint joinpoint) throws Throwable
{
ExecutionWrapper wrapper = new JoinpointDispatchWrapper(joinpoint);
return dispatchExecutionWrapper(context, wrapper);
}
/**
* Dispatch a wrapper
*
* @param context the context
* @param wrapper the wrapper
* @return the result
* @throws Throwable for any error
*/
static Object dispatchExecutionWrapper(final KernelControllerContext context, final ExecutionWrapper wrapper) throws Throwable
{
BeanMetaData metaData = context.getBeanMetaData();
ClassLoader cl = Configurator.getClassLoader(metaData);
AccessControlContext access = null;
if (context instanceof AbstractKernelControllerContext)
{
AbstractKernelControllerContext theContext = (AbstractKernelControllerContext) context;
access = theContext.getAccessControlContext();
}
KernelController controller = (KernelController) context.getController();
KernelMetaDataRepository repository = controller.getKernel().getMetaDataRepository();
MetaData md = repository.getMetaData(context);
if (md != null)
MetaDataStack.push(md);
else
staticLog.warn("NO METADATA! for " + context.getName() + " with scope " + context.getScopeInfo().getScope());
try
{
// Dispatch with the bean class loader if it exists
ClassLoader tcl = Thread.currentThread().getContextClassLoader();
try
{
if (cl != null)
Thread.currentThread().setContextClassLoader(cl);
return wrapper.execute(access);
}
finally
{
Thread.currentThread().setContextClassLoader(tcl);
}
}
finally
{
if (md != null)
MetaDataStack.pop();
}
}
protected boolean validateContext(ControllerContext context)
{
return (context instanceof AbstractKernelControllerContext);
}
protected KernelControllerContext contextCast(ControllerContext context)
{
return KernelControllerContext.class.cast(context);
}
public void installAction(KernelControllerContext context) throws Throwable
{
installActionInternal(context);
setKernelControllerContext(context);
}
/**
* Set the context.
*
* @param context the context
* @throws Throwable for any error
*/
protected void setKernelControllerContext(KernelControllerContext context) throws Throwable
{
Object target = context.getTarget();
if (target != null)
{
Class<? extends KernelControllerContextAware> awareInterface = getActionAwareInterface();
// only applying interfaces that explicitly extend KernelControllerContextAware
if (awareInterface != null &&
awareInterface.equals(KernelControllerContextAware.class) == false &&
awareInterface.isAssignableFrom(target.getClass()))
{
((KernelControllerContextAware)target).setKernelControllerContext(context);
}
}
}
/**
* Execute install action.
*
* @param context the context
* @throws Throwable for any error
*/
protected void installActionInternal(KernelControllerContext context) throws Throwable
{
}
/**
* Get the action aware interface.
*
* @return the action aware interface
*/
protected Class<? extends KernelControllerContextAware> getActionAwareInterface()
{
return null;
}
public void uninstallAction(KernelControllerContext context)
{
unsetKernelControllerContext(context);
uninstallActionInternal(context);
}
/**
* Execute uninstall action.
*
* @param context the context
*/
protected void uninstallActionInternal(KernelControllerContext context)
{
}
/**
* Unset the context.
*
* @param context the context
*/
protected void unsetKernelControllerContext(KernelControllerContext context)
{
Object target = context.getTarget();
if (target != null)
{
Class<? extends KernelControllerContextAware> awareInterface = getActionAwareInterface();
// only applying interfaces that explicitly extend KernelControllerContextAware
if (awareInterface != null &&
awareInterface.equals(KernelControllerContextAware.class) == false &&
awareInterface.isAssignableFrom(target.getClass()))
{
try
{
((KernelControllerContextAware) target).unsetKernelControllerContext(context);
}
catch (Exception ignored)
{
log.debug("Ignored error unsetting context " + context.getName(), ignored);
}
}
}
}
/**
* Joinpoint dispatch execution wrapper.
*/
private static class JoinpointDispatchWrapper extends ExecutionWrapper
{
private Joinpoint joinpoint;
public JoinpointDispatchWrapper(Joinpoint joinpoint)
{
if (joinpoint == null)
throw new IllegalArgumentException("Null joinpoint");
this.joinpoint = joinpoint;
}
protected Object execute() throws Throwable
{
return joinpoint.dispatch();
}
protected PrivilegedExceptionAction<Object> getAction()
{
return new DispatchJoinPoint(joinpoint);
}
}
/**
* Get bean validator bridge.
*
* @param context the owner context
* @return bean validator bridge instance if exists, null otherwise
*/
static BeanValidatorBridge getBeanValidatorBridge(KernelControllerContext context)
{
Controller controller = context.getController();
if (controller == null)
return null;
ControllerContext bridge = controller.getInstalledContext(BeanValidatorBridge.class);
return bridge != null ? BeanValidatorBridge.class.cast(bridge.getTarget()) : null;
}
}