/*
 * Copyright (C) The MX4J Contributors.
 * All rights reserved.
 *
 * This software is distributed under the terms of the MX4J License version 1.0.
 * See the terms of the MX4J License in the documentation provided with this software.
 */

package mx4j.tools.console.web;

import java.util.HashMap;
import java.util.Map;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import com.opensymphony.webwork.dispatcher.ServletDispatcher;
import com.opensymphony.xwork.ActionContext;
import com.opensymphony.xwork.ActionProxy;
import com.opensymphony.xwork.ActionProxyFactory;
import com.opensymphony.xwork.config.ConfigurationException;
import com.opensymphony.xwork.util.OgnlValueStack;

/**
 * @version $Revision$
 */
public class DispatcherServlet extends ServletDispatcher
{
   public void serviceAction(HttpServletRequest request, HttpServletResponse response, String namespace, String actionName, Map requestMap, Map parameterMap, Map sessionMap, Map applicationMap)
   {
      Object previousValueStack = request.getAttribute("webwork.valueStack");
      try
      {
         HashMap extraContext = createContextMap(requestMap, parameterMap, sessionMap, applicationMap, request, response, getServletConfig());
         extraContext.put(SERVLET_DISPATCHER, this);
         if (previousValueStack != null) extraContext.put(ActionContext.VALUE_STACK, previousValueStack);

         ActionProxy proxy = ActionProxyFactory.getFactory().createActionProxy(namespace, actionName, extraContext);
         OgnlValueStack currentValueStack = proxy.getInvocation().getStack();
         request.setAttribute("webwork.valueStack", currentValueStack);
         try
         {
            proxy.execute();
         }
         finally
         {
            currentValueStack.pop();
         }
      }
      catch (ConfigurationException e)
      {
         log.error("Could not find action", e);
         sendError(request, response, HttpServletResponse.SC_NOT_FOUND, e);
      }
      catch (Exception e)
      {
         log.error("Could not execute action", e);
         sendError(request, response, HttpServletResponse.SC_INTERNAL_SERVER_ERROR, e);
      }
      finally
      {
         request.setAttribute("webwork.valueStack", previousValueStack);
      }
   }
}