/******************************************************************************
* JBoss, a division of Red Hat *
* Copyright 2008, Red Hat Middleware, LLC, 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.portal.portlet.aspects.portlet;
import org.jboss.portal.portlet.invocation.PortletInvocation;
import org.jboss.portal.portlet.invocation.EventInvocation;
import org.jboss.portal.portlet.PortletInvokerInterceptor;
import org.jboss.portal.portlet.invocation.response.ErrorResponse;
import org.jboss.portal.portlet.invocation.response.PortletInvocationResponse;
import org.jboss.portal.portlet.container.PortletContainer;
import org.jboss.portal.portlet.container.ContainerPortletInvoker;
import org.jboss.portal.portlet.container.PortletApplication;
import org.jboss.portal.portlet.container.PortletApplicationContext;
import org.jboss.portal.portlet.info.PortletInfo;
import org.jboss.portal.portlet.info.EventingInfo;
import org.jboss.portal.portlet.info.EventInfo;
import org.jboss.portal.portlet.impl.info.ContainerTypeInfo;
import org.jboss.portal.portlet.PortletInvokerException;
import org.jboss.portal.common.io.IOTools;
import org.apache.log4j.Logger;
import javax.xml.namespace.QName;
import java.io.Serializable;
import java.io.IOException;
import java.util.Map;
/**
* This interceptor is responsible for taking care of converting the optional event payload to the application
* classloader.
*
* @author <a href="mailto:julien@jboss.org">Julien Viet</a>
* @version $Revision: 630 $
*/
public class EventPayloadInterceptor extends PortletInvokerInterceptor
{
/** . */
private final static Logger log = Logger.getLogger(EventPayloadInterceptor.class);
public PortletInvocationResponse invoke(PortletInvocation invocation) throws IllegalArgumentException, PortletInvokerException
{
if (invocation instanceof EventInvocation)
{
EventInvocation eventInvocation = (EventInvocation)invocation;
//
Serializable srcPayload = eventInvocation.getPayload();
//
Serializable dstPayload = null;
if (srcPayload != null)
{
PortletContainer container = (PortletContainer)invocation.getAttribute(ContainerPortletInvoker.PORTLET_CONTAINER);
//
PortletApplication application = container.getPortletApplication();
PortletApplicationContext applicationContext = application.getContext();
ClassLoader applicationClassLoader = applicationContext.getClassLoader();
String srcPayloadClassName = srcPayload.getClass().getName();
boolean trace = log.isTraceEnabled();
QName eventName = eventInvocation.getName();
String containerId = container.getId();
String applicationId = application.getId();
//
PortletInfo info = container.getInfo();
EventingInfo eventingInfo = info.getEventing();
Map<QName, ? extends EventInfo> consumedEventInfos = eventingInfo.getConsumedEvents();
EventInfo eventInfo = consumedEventInfos.get(eventName);
//
if (trace)
{
log.trace("Attempt to obtain for event " + eventName + " its payload class " + srcPayloadClassName + " in the application " + applicationId +
" for portlet " + container.getInfo());
}
//
Class dstPayloadClass = null;
if (eventInfo != null)
{
ContainerTypeInfo typeInfo = (ContainerTypeInfo)eventInfo.getType();
//
if (typeInfo != null)
{
dstPayloadClass = typeInfo.getType();
if (trace)
{
log.trace("Obtained for event " + eventName + " its payload class " + dstPayloadClass.getName() + " declared by the portlet meta data "
+ containerId);
}
}
else
{
if (trace)
{
log.trace("No type declared for event " + eventName + " declared by the portlet meta data " + containerId);
}
}
}
//
if (dstPayloadClass == null)
{
if (trace)
{
log.trace("No event meta data declared by portlet " + containerId + " for event " + eventName + " will attempty " +
" to load same class name from the application " + applicationId + " classloader");
}
// We try to load the same class from the applicaton class loader
try
{
dstPayloadClass = applicationClassLoader.loadClass(srcPayloadClassName);
if (trace)
{
log.trace("Obtained matching event class " + dstPayloadClass.getName() + " in application " + applicationId + " for event " + eventName);
}
}
catch (ClassNotFoundException e)
{
return new ErrorResponse("The application " + applicationId + " does not have access to the event payload class"
+ srcPayloadClassName, e);
}
catch (NoClassDefFoundError e)
{
return new ErrorResponse("The application " + applicationId + " does not have access to the event payload class"
+ srcPayloadClassName, e);
}
}
// We need maybe to perform some serialization to the classloader
if (dstPayloadClass != srcPayload.getClass())
{
if (trace)
{
log.trace("Need to convert event payload from class " + srcPayloadClassName + " to " + dstPayloadClass.getName());
}
try
{
dstPayload = IOTools.clone(srcPayload, applicationClassLoader);
}
catch (ClassNotFoundException e)
{
return new ErrorResponse("Could not convert the event payload from class " + srcPayloadClassName + " to class " + dstPayloadClass.getName(), e);
}
catch (IOException e)
{
// The cause is likely a non compatible changes in class version
return new ErrorResponse("Could not convert the event payload from class " + srcPayloadClassName + " to class " + dstPayloadClass.getName(), e);
}
}
else
{
dstPayload = srcPayload;
}
}
// Set payload
eventInvocation.setPayload(dstPayload);
//
try
{
return super.invoke(invocation);
}
finally
{
eventInvocation.setPayload(srcPayload);
}
}
else
{
return super.invoke(invocation);
}
}
}