/*
    * $Id: GWUIWebStartServlet.java 1537 2011-07-27 15:34:04Z hoheisel $
    *
    * Copyright (c) 2005-2006, The K-Wf Grid Consortium
    * Fraunhofer Institute for Computer Architecture and Software Technology
    * See http://www.kwfgrid.eu and http://www.first.fraunhofer.de for more details.
    */
   
   package net.kwfgrid.gwes.servlet;
  
  import org.antlr.stringtemplate.StringTemplate;
  import org.apache.log4j.Logger;
  
  import javax.servlet.ServletException;
  import javax.servlet.http.HttpServlet;
  import javax.servlet.http.HttpServletRequest;
  import javax.servlet.http.HttpServletResponse;
  import java.io.IOException;
  import java.io.PrintWriter;
  import java.net.MalformedURLException;
  
  import net.kwfgrid.gwes.client.RemoteGWES;
  
  /**
   * Servlet for creating jnlp for the GWUI java webstart application.
   *
   * @author Andreas Hoheisel
   *         (<a href="http://www.andreas-hoheisel.de">www.andreas-hoheisel.de</a>)
   * @version $Id: GWUIWebStartServlet.java 1537 2011-07-27 15:34:04Z hoheisel $
   */
  public class GWUIWebStartServlet extends HttpServlet {
  
      final static Logger logger = Logger.getLogger(GWUIWebStartServlet.class);
      private static GWESProperties pr;
  
      protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
          ServletLogger.log(request);
  
          //read gwes.properties
          if (pr == null) pr = GWESProperties.getInstance("/gwes.properties");
  
          PrintWriter out = response.getWriter();
  
          // get workflow ID
          String workflowID = request.getParameter("workflowid");
          if (workflowID == null) {
              workflowID = (String) request.getSession().getAttribute("workflowid");
          } else {
              request.getSession().setAttribute("workflowid",workflowID);
          }
          logger.debug("session workflow = "+workflowID);
  
          try {
              response.setContentType("application/x-java-jnlp-file");
              StringTemplate t = Template.getStringTemplateGroup("html_gwes-servlets").getInstanceOf("webstart");
              if (workflowID!=null) t.setAttribute("workflowID", workflowID);
              t.setAttribute("gwesBaseUrlExternal", pr.gwesBaseUrlExternal);
              out.print(t.toString());
          } catch (Exception e) {
              out.println("<hr><b>ERROR starting GWUI Web Start: " + e + "</b>");
              out.println("<pre>");
              e.printStackTrace(out);
              out.println("</pre>");
              out.println("<hr>");
          }
      }
  
      protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
          doGet(request, response);
      }
  
  }