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.ServletOutputStream; 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.gatewayrecievers.GatewayReceiver; import pivotal.au.se.gemfirexdweb.dao.gatewayrecievers.GatewayReceiverDAO; import pivotal.au.se.gemfirexdweb.main.Result; import pivotal.au.se.gemfirexdweb.main.UserPref; import pivotal.au.se.gemfirexdweb.utils.AdminUtil; @Controller public class GatewayReceiverController { protected static Logger logger = Logger.getLogger("controller"); private static final String FILENAME = "%s.sql"; private static final String SAVE_CONTENT_TYPE = "application/x-download"; @RequestMapping(value = "/gatewayreceivers", method = RequestMethod.GET) public String showGatewayReceivers(Model model, HttpServletResponse response, HttpServletRequest request, HttpSession session) throws Exception { int startAtIndex = 0, endAtIndex = 0; javax.servlet.jsp.jstl.sql.Result allGatewayRecieverInfoResult = 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 gateway recievers"); GatewayReceiverDAO grDAO = GemFireXDWebDAOFactory.getGatewayRecieverDAO(); Result result = new Result(); String grAction = request.getParameter("grAction"); if (grAction != null) { logger.debug("grAction = " + grAction); if (grAction.equals("ALLGATEWAYRECIEVERINFO")) { allGatewayRecieverInfoResult = grDAO.getGatewayRecieverInfo((String) request.getParameter("id"), (String) session.getAttribute("user_key")); model.addAttribute("allGatewayRecieverInfoResult", allGatewayRecieverInfoResult); model.addAttribute("gatewayreciever", (String) request.getParameter("id")); } else { result = null; result = grDAO.simplegatewayReceiverCommand((String) request.getParameter("id"), grAction, (String) session.getAttribute("user_key")); model.addAttribute("result", result); } } List<GatewayReceiver> gatewayreceivers = grDAO.retrieveGatewayReceiverList( (String) session.getAttribute("schema"), null, (String) session.getAttribute("user_key")); model.addAttribute("records", gatewayreceivers.size()); model.addAttribute("estimatedrecords", gatewayreceivers.size()); UserPref userPref = (UserPref) session.getAttribute("prefs"); if (gatewayreceivers.size() <= userPref.getRecordsToDisplay()) { model.addAttribute("gatewayreceivers", gatewayreceivers); } 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 > gatewayreceivers.size()) { endAtIndex = gatewayreceivers.size(); } } else { endAtIndex = userPref.getRecordsToDisplay(); } List subList = gatewayreceivers.subList(startAtIndex, endAtIndex); model.addAttribute("gatewayreceivers", subList); } model.addAttribute("startAtIndex", startAtIndex); model.addAttribute("endAtIndex", endAtIndex); // This will resolve to /WEB-INF/jsp/gatewayreceivers.jsp return "gatewayreceivers"; } @RequestMapping(value = "/gatewayreceivers", method = RequestMethod.POST) public String performGatewayReceiversAction(Model model, HttpServletResponse response, HttpServletRequest request, HttpSession session) throws Exception { 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; } } } int startAtIndex = 0, endAtIndex = 0; Result result = new Result(); List<GatewayReceiver> gatewayreceivers = null; String ddlString = null; logger.debug("Received request to perform an action on the gateway recievers"); GatewayReceiverDAO grDAO = GemFireXDWebDAOFactory.getGatewayRecieverDAO(); if (request.getParameter("search") != null) { gatewayreceivers = grDAO.retrieveGatewayReceiverList((String) session.getAttribute("schema"), (String) request.getParameter("search"), (String) session.getAttribute("user_key")); model.addAttribute("search", (String) request.getParameter("search")); } else { String[] tableList = request.getParameterValues("selected_gatewayreceivers[]"); 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>(); List<String> al2 = new ArrayList<String>(); for (String id : tableList) { if (commandStr.equalsIgnoreCase("DDL") || commandStr.equalsIgnoreCase("DDL_FILE")) { ddlString = grDAO.generateDDL(id, (String) session.getAttribute("user_key")); al2.add(ddlString); } else { result = null; result = grDAO.simplegatewayReceiverCommand(id, commandStr, (String) session.getAttribute("user_key")); al.add(result); } } if (commandStr.equalsIgnoreCase("DDL")) { request.setAttribute("arrayresultddl", al2); } else if (commandStr.equalsIgnoreCase("DDL_FILE")) { response.setContentType(SAVE_CONTENT_TYPE); response.setHeader("Content-Disposition", "attachment; filename=" + String.format(FILENAME, "GatewayReceiverDDL")); ServletOutputStream out = response.getOutputStream(); for (String ddl : al2) { out.println(ddl); } out.close(); return null; } else { model.addAttribute("arrayresult", al); } } gatewayreceivers = grDAO.retrieveGatewayReceiverList((String) session.getAttribute("schema"), null, (String) session.getAttribute("user_key")); } model.addAttribute("records", gatewayreceivers.size()); model.addAttribute("estimatedrecords", gatewayreceivers.size()); UserPref userPref = (UserPref) session.getAttribute("prefs"); if (gatewayreceivers.size() <= userPref.getRecordsToDisplay()) { model.addAttribute("gatewayreceivers", gatewayreceivers); } 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 > gatewayreceivers.size()) { endAtIndex = gatewayreceivers.size(); } } else { endAtIndex = userPref.getRecordsToDisplay(); } List subList = gatewayreceivers.subList(startAtIndex, endAtIndex); model.addAttribute("gatewayreceivers", subList); } model.addAttribute("startAtIndex", startAtIndex); model.addAttribute("endAtIndex", endAtIndex); // This will resolve to /WEB-INF/jsp/gatewayreceivers.jsp return "gatewayreceivers"; } }