/** * This action deletes all alerts from the system. * * @param userSession the user session that is performing the action. * @param request the http request object related to the action. * @param response the http response object related to the action. * @throws javax.servlet.ServletException * @throws java.io.IOException */ public void performDeleteAll( UserSession userSession, HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { LogController.write(this, "[USER REQUEST] Performing all alert delete."); SessionController.deleteAlerts(userSession); forward("welcome-employee.jsp", request, response); }
/** * This action deletes a single alert from the system. * * @param userSession the user session that is performing the action. * @param request the http request object related to the action. * @param response the http response object related to the action. * @throws javax.servlet.ServletException * @throws java.io.IOException */ public void performDelete( UserSession userSession, HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { String alert_no = request.getParameter("alert_no"); LogController.write(this, "[USER REQUEST] Performing alert delete: " + alert_no); AlertBean alert = new AlertBean(); try { alert.setAlertNo(Integer.parseInt(alert_no)); } catch (Exception e) { LogController.write(this, "Received invalid value for alert number: " + alert_no); return; } SessionController.deleteAlert(userSession, alert); forward("welcome-employee.jsp", request, response); }
/** * Initializes the dispatcher servlet. This sets the post/get to true and calls the abstract setup * actions method. */ @Override public void init() { setIsPostAllowed(true); setIsGetAllowed(true); try { setupActionMethods(); } catch (NoSuchMethodException methodEx) { LogController.write(this, "FATAL: No such method: " + methodEx.getMessage()); return; } finally { actionInitialized = true; } }
/** * Processes the request coming to the servlet and grabs the attributes set by the servlet and * uses them to fire off pre-determined methods set in the setupActionMethods function of the * servlet. * * @param request the http request coming from the browser. * @param response the http response going to the browser. * @throws javax.servlet.ServletException * @throws java.io.IOException */ protected void processRequest(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { if (!actionInitialized) { LogController.write(this, "This dispatcher servlet is not initialized properly!"); return; } if (actionTag == null) { LogController.write(this, "There is no action attribute tag name!"); return; } HttpSession httpSession = request.getSession(); UserSession userSession = (UserSession) httpSession.getAttribute("user_session"); if (userSession == null) { LogController.write(this, "User session is no longer available in this http session."); userSession = new UserSession(); // We always want a user session though... httpSession.setAttribute("user_session", userSession); } String action = (String) request.getAttribute(actionTag); try { if (action == null) { // There is no action attribute specified, check parameters. String external_action = (String) request.getParameter(actionTag); if (external_action != null) { Method method = externalActions.get(external_action); if (method != null) { LogController.write(this, "Performing external action: " + external_action); method.invoke(this, new Object[] {userSession, request, response}); } else { if (defaultExternalMethod != null) { LogController.write(this, "Performing default external action."); defaultExternalMethod.invoke(this, new Object[] {userSession, request, response}); } else { LogController.write(this, "Unable to perform default external action."); } } } else { if (defaultExternalMethod != null) { LogController.write(this, "Performing default external action."); defaultExternalMethod.invoke(this, new Object[] {userSession, request, response}); } else { LogController.write(this, "Unable to perform default external action."); } } } else { Method method = internalActions.get(action); if (method != null) { LogController.write(this, "Performing internal action: " + action); method.invoke(this, new Object[] {userSession, request, response}); } else { if (defaultInternalMethod != null) { LogController.write(this, "Performing default internal action."); defaultInternalMethod.invoke(this, new Object[] {userSession, request, response}); } else { LogController.write(this, "Unable to perform default internal action."); } } request.removeAttribute("application_action"); } } catch (IllegalAccessException accessEx) { LogController.write(this, "Exception while processing request: " + accessEx.getMessage()); } catch (InvocationTargetException invokeEx) { LogController.write(this, "Exception while processing request: " + invokeEx.toString()); invokeEx.printStackTrace(); } catch (Exception ex) { LogController.write(this, "Unknown exception: " + ex.toString()); } }