/*
  * 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.aspects.remoting;

import java.io.ObjectStreamException;

import org.jboss.logging.Logger;
import org.jboss.remoting.Client;
import org.jboss.remoting.InvokerLocator;
/**
 * Checks to see if this object is local in VM
 *
 * @author <a href="mailto:bill@jboss.org">Bill Burke</a>
 * @version $Revision: 59458 $
 */
public class InvokeRemoteInterceptor implements org.jboss.aop.advice.Interceptor, java.io.Serializable
{
   private static final Logger log = Logger.getLogger(InvokeRemoteInterceptor.class);
   
   private static final long serialVersionUID = -145166951731929406L;
   
   public static final InvokeRemoteInterceptor singleton = new InvokeRemoteInterceptor();
   public static final String REMOTING = "REMOTING";
   public static final String INVOKER_LOCATOR = "INVOKER_LOCATOR";
   public static final String SUBSYSTEM = "SUBSYSTEM";

   public String getName() { return "InvokeRemoteInterceptor"; }

   public Object invoke(org.jboss.aop.joinpoint.Invocation invocation) throws Throwable
   {
      InvokerLocator locator = (InvokerLocator)invocation.getMetaData(REMOTING, INVOKER_LOCATOR);
      if (locator == null)
      {
         throw new RuntimeException("No InvokerLocator supplied.  Can't invoke remotely!");
      }
      String subsystem = (String)invocation.getMetaData(REMOTING, SUBSYSTEM);
      if (subsystem == null) subsystem = "AOP";
      Client client = new Client(locator, subsystem);
      
      try 
      {
         client.connect();
         org.jboss.aop.joinpoint.InvocationResponse response = (org.jboss.aop.joinpoint.InvocationResponse)client.invoke(invocation, null);
         invocation.setResponseContextInfo(response.getContextInfo());
         return response.getResponse();
      }
      catch (Exception e)
      {
         StackTraceElement[] serverStackTrace;
         if (e.getCause() != null)
            serverStackTrace = e.getCause().getStackTrace();
         else
            serverStackTrace = e.getStackTrace();
         
         Exception clientException = new Exception();
         StackTraceElement[] clientStackTrace = clientException.getStackTrace();
         StackTraceElement[] completeStackTrace = new StackTraceElement[serverStackTrace.length + clientStackTrace.length];
         System.arraycopy(serverStackTrace, 0, completeStackTrace, 0, serverStackTrace.length);
         System.arraycopy(clientStackTrace, 0, completeStackTrace, serverStackTrace.length, clientStackTrace.length);
         
         if (e.getCause() != null)
            e.getCause().setStackTrace(completeStackTrace);
         else
            e.setStackTrace(completeStackTrace);
         
         throw e;
      }
      finally
      {
         client.disconnect();
      }
   }

   Object readResolve() throws ObjectStreamException {
      return singleton;
   }
}