package xuml.tools.diagram;
   
   import java.io.IOException;
   
   import javax.servlet.ServletException;
   import javax.servlet.http.HttpServlet;
   import javax.servlet.http.HttpServletRequest;
   import javax.servlet.http.HttpServletResponse;
   
  public class PresentationServlet extends HttpServlet {
  
      private static final long serialVersionUID = -8814285976808898809L;
  
      @Override
      protected void doGet(HttpServletRequest req, HttpServletResponse resp)
              throws ServletException, IOException {
          try {
              String id = req.getParameter("id");
              String result = PresentationPersistence.instance().get(id);
              resp.setContentType("text/plain");
              if (result != null)
                  resp.getOutputStream().write(result.getBytes());
          } catch (RuntimeException e) {
              e.printStackTrace();
              throw e;
          }
      }
  
      @Override
      protected void doPost(HttpServletRequest req, HttpServletResponse resp)
              throws ServletException, IOException {
          String id = req.getParameter("id");
          String value = req.getParameter("value");
          try {
              // save
              PresentationPersistence.instance().save(id, value);
          } catch (RuntimeException e) {
              resp.setStatus(500);
              resp.getWriter().println(e.getMessage());
          }
      }
  }