CreateAI.java :  » Game » mages » org » mega » gasp » platform » servlets » Android Open Source

/***
 * GASP: a gaming services platform for mobile multiplayer games.
 * Copyright (C) 2004 CNAM/INT
 * 
 * This library 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 of the License, or (at your option) any later version.
 * 
 * This library 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 library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 * 
 * Contact: gasp-team@objectweb.org
 *
 * Author: Romain Pellerin
 */
package org.mega.gasp.platform.servlets;

import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.util.Hashtable;

import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.aksonov.mages.entities.GameSettings;
import org.apache.log4j.Category;
import org.mega.gasp.event.DataEvent;
import org.mega.gasp.event.impl.DataEventImpl;
import org.mega.gasp.moods.CustomTypes;
import org.mega.gasp.platform.ApplicationInstance;
import org.mega.gasp.platform.impl.PlatformImpl;

/**
 * This servlet provide to create an ApplicationInstance to the user. The HTTP
 * parameters are : - sID the Session ID of the user - minActors the minimum
 * actors required to start the game - maxActors the maximum actors can join the
 * ApplicationInstance - actors the Actor IDs of the actors for a private game
 * or nothing
 * 
 * @author PELLERIN Romain (pellerin@cnam.fr) - MEGA Project
 */
public class CreateAI extends HttpServlet {

  private int aSID;
  private PlatformImpl platform;
  private Category cat;

  public void init() {
    ServletContext app = getServletContext();
    platform = PlatformImpl.getPlatform();
    cat = Category.getInstance("CreateServlet");
  }

  public void doGet(HttpServletRequest request, HttpServletResponse response)
      throws IOException, ServletException {
        throw new IOException("GET Request is not supported");
  }

  public void doPost(HttpServletRequest request, HttpServletResponse response)
      throws IOException, ServletException {
    try {
      // get http request parameters for login
      short sID = Short.parseShort(request.getParameter("sID"));
      int minActors = Integer.parseInt(request.getParameter("minActors"));
      int maxActors = Integer.parseInt(request.getParameter("maxActors"));
      int aIID = 0;

      if (minActors > 0 && minActors <= maxActors) {
        String[] actors = request.getParameterValues("actors");

        // create an application instance owned by the sid represented
        // actor
        // with necessited parameters minActors and maxActors
        // if the table actors is empty then the application instance
        // is private statued else public
        aSID = platform.createAI(Integer.parseInt(sID + ""), minActors,
            maxActors, actors);

        ApplicationInstance appIns = platform.getActorSessionOwner(aSID);
        aIID = appIns.getApplicationInstanceID();
        
        // reading custom data (if any)
        boolean getCustomData = request.getParameter("custom_data") != null
            && request.getParameter("custom_data").equals("1");

        if (getCustomData) {
          cat.debug("Reading custom data for Create");
          DataInputStream dis = new DataInputStream(request
              .getInputStream());

          CustomTypes customTypes = appIns.getCustomTypes();

          Hashtable h = customTypes.decodeData(dis);

          if (h.size() != 0) {
            cat.debug("Received data from client, number of objects: "
                + h.size());
            for (int i=0;i<h.size();i++){
              if (h.get(i+"") instanceof GameSettings){
                GameSettings settings = ((GameSettings)h.get(i+"")); 
                cat.debug("Game settings received, number of players: " + settings.players.size()); 
                settings.id = aIID;
              }
            }
            DataEvent de = new DataEventImpl(aSID, h);
            appIns.onDataEvent(de);
          }
          
          dis.close();
        }

        // write the short sID in the http response
      } else {
        cat
            .debug("invalid minActors and maxActors parameters in create request ("
                + minActors + "," + maxActors + ")");
        aSID = 0;
      }
      DataOutputStream dos = new DataOutputStream(response.getOutputStream());
      response.setContentType("octet/stream");
      response.setContentLength(2);
//      dos.writeShort(aSID);
      dos.writeShort(aIID);
      cat.info("Writing aIID as output" + aIID);
      dos.close();
    } catch (Exception e) {
      e.printStackTrace();
      cat.info("cannot comply to received create request "
          + e.getMessage());
    } 
  }

}