Java tutorial
/* Copyright (C) MARCH-2014 Pivotal Software, Inc. All rights reserved. This program and the accompanying materials are made available under the terms of the under the Apache License, Version 2.0 (the "License?); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. */ package pivotal.au.se.gemfirexdweb.controller; import java.sql.Connection; import java.util.ArrayList; import java.util.Arrays; import java.util.List; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import javax.servlet.http.HttpSession; import org.apache.log4j.Logger; import org.springframework.stereotype.Controller; import org.springframework.ui.Model; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestMethod; import pivotal.au.se.gemfirexdweb.dao.GemFireXDWebDAOFactory; import pivotal.au.se.gemfirexdweb.dao.GemFireXDWebDAOUtil; import pivotal.au.se.gemfirexdweb.dao.views.View; import pivotal.au.se.gemfirexdweb.dao.views.ViewDAO; import pivotal.au.se.gemfirexdweb.main.Result; import pivotal.au.se.gemfirexdweb.main.UserPref; import pivotal.au.se.gemfirexdweb.utils.AdminUtil; @Controller public class ViewController { protected static Logger logger = Logger.getLogger("controller"); @RequestMapping(value = "/views", method = RequestMethod.GET) public String showTables(Model model, HttpServletResponse response, HttpServletRequest request, HttpSession session) throws Exception { int startAtIndex = 0, endAtIndex = 0; String schema = null; if (session.getAttribute("user_key") == null) { logger.debug("user_key is null new Login required"); response.sendRedirect(request.getContextPath() + "/GemFireXD-Web/login"); return null; } else { Connection conn = AdminUtil.getConnection((String) session.getAttribute("user_key")); if (conn == null) { response.sendRedirect(request.getContextPath() + "/GemFireXD-Web/login"); return null; } else { if (conn.isClosed()) { response.sendRedirect(request.getContextPath() + "/GemFireXD-Web/login"); return null; } } } logger.debug("Received request to show views"); ViewDAO viewDAO = GemFireXDWebDAOFactory.getViewDAO(); Result result = new Result(); String viewAction = request.getParameter("viewAction"); String selectedSchema = request.getParameter("selectedSchema"); logger.debug("selectedSchema = " + selectedSchema); if (selectedSchema != null) { schema = selectedSchema; } else { schema = (String) session.getAttribute("schema"); } logger.debug("schema = " + schema); if (viewAction != null) { logger.debug("viewAction = " + viewAction); result = null; result = viewDAO.simpleviewCommand(schema, (String) request.getParameter("viewName"), viewAction, (String) session.getAttribute("user_key")); model.addAttribute("result", result); } List<View> views = viewDAO.retrieveViewList(schema, null, (String) session.getAttribute("user_key")); model.addAttribute("records", views.size()); model.addAttribute("estimatedrecords", views.size()); UserPref userPref = (UserPref) session.getAttribute("prefs"); if (views.size() <= userPref.getRecordsToDisplay()) { model.addAttribute("views", views); } else { if (request.getParameter("startAtIndex") != null) { startAtIndex = Integer.parseInt(request.getParameter("startAtIndex")); } if (request.getParameter("endAtIndex") != null) { endAtIndex = Integer.parseInt(request.getParameter("endAtIndex")); if (endAtIndex > views.size()) { endAtIndex = views.size(); } } else { endAtIndex = userPref.getRecordsToDisplay(); } List subList = views.subList(startAtIndex, endAtIndex); model.addAttribute("views", subList); } model.addAttribute("startAtIndex", startAtIndex); model.addAttribute("endAtIndex", endAtIndex); model.addAttribute("schemas", GemFireXDWebDAOUtil.getAllSchemas((String) session.getAttribute("user_key"))); model.addAttribute("chosenSchema", schema); // This will resolve to /WEB-INF/jsp/views.jsp return "views"; } @RequestMapping(value = "/views", method = RequestMethod.POST) public String performTableAction(Model model, HttpServletResponse response, HttpServletRequest request, HttpSession session) throws Exception { String schema = null; int startAtIndex = 0, endAtIndex = 0; if (session.getAttribute("user_key") == null) { logger.debug("user_key is null new Login required"); response.sendRedirect(request.getContextPath() + "/GemFireXD-Web/login"); return null; } else { Connection conn = AdminUtil.getConnection((String) session.getAttribute("user_key")); if (conn == null) { response.sendRedirect(request.getContextPath() + "/GemFireXD-Web/login"); return null; } else { if (conn.isClosed()) { response.sendRedirect(request.getContextPath() + "/GemFireXD-Web/login"); return null; } } } Result result = new Result(); List<View> views = null; logger.debug("Received request to perform an action on the views"); String selectedSchema = request.getParameter("selectedSchema"); logger.debug("selectedSchema = " + selectedSchema); if (selectedSchema != null) { schema = selectedSchema; } else { schema = (String) session.getAttribute("schema"); } logger.debug("schema = " + schema); ViewDAO viewDAO = GemFireXDWebDAOFactory.getViewDAO(); if (request.getParameter("search") != null) { views = viewDAO.retrieveViewList(schema, (String) request.getParameter("search"), (String) session.getAttribute("user_key")); model.addAttribute("search", (String) request.getParameter("search")); } else { String[] tableList = request.getParameterValues("selected_view[]"); String commandStr = request.getParameter("submit_mult"); logger.debug("tableList = " + Arrays.toString(tableList)); logger.debug("command = " + commandStr); // start actions now if tableList is not null if (tableList != null) { List al = new ArrayList<Result>(); for (String view : tableList) { result = null; result = viewDAO.simpleviewCommand(schema, view, commandStr, (String) session.getAttribute("user_key")); al.add(result); } model.addAttribute("arrayresult", al); } views = viewDAO.retrieveViewList(schema, null, (String) session.getAttribute("user_key")); } model.addAttribute("records", views.size()); model.addAttribute("estimatedrecords", views.size()); UserPref userPref = (UserPref) session.getAttribute("prefs"); if (views.size() <= userPref.getRecordsToDisplay()) { model.addAttribute("views", views); } else { if (request.getParameter("startAtIndex") != null) { startAtIndex = Integer.parseInt(request.getParameter("startAtIndex")); } if (request.getParameter("endAtIndex") != null) { endAtIndex = Integer.parseInt(request.getParameter("endAtIndex")); if (endAtIndex > views.size()) { endAtIndex = views.size(); } } else { endAtIndex = userPref.getRecordsToDisplay(); } List subList = views.subList(startAtIndex, endAtIndex); model.addAttribute("views", subList); } model.addAttribute("startAtIndex", startAtIndex); model.addAttribute("endAtIndex", endAtIndex); model.addAttribute("schemas", GemFireXDWebDAOUtil.getAllSchemas((String) session.getAttribute("user_key"))); model.addAttribute("chosenSchema", schema); // This will resolve to /WEB-INF/jsp/views.jsp return "views"; } }