Java tutorial
/* * Copyright 2012 LinkedIn Corp. * * Licensed 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 azkaban.webapp.servlet; import java.io.IOException; import java.util.HashMap; import java.util.List; import javax.servlet.ServletConfig; import javax.servlet.ServletException; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.joda.time.format.DateTimeFormat; import azkaban.executor.ExecutableFlow; import azkaban.executor.ExecutorManagerAdapter; import azkaban.executor.ExecutorManagerException; import azkaban.project.Project; import azkaban.project.ProjectManager; import azkaban.server.session.Session; import azkaban.webapp.AzkabanWebServer; public class HistoryServlet extends LoginAbstractAzkabanServlet { private static final String FILTER_BY_DATE_PATTERN = "MM/dd/yyyy hh:mm aa"; private static final long serialVersionUID = 1L; private ExecutorManagerAdapter executorManager; private ProjectManager projectManager; private ExecutorVMHelper vmHelper; @Override public void init(ServletConfig config) throws ServletException { super.init(config); AzkabanWebServer server = (AzkabanWebServer) getApplication(); executorManager = server.getExecutorManager(); projectManager = server.getProjectManager(); vmHelper = new ExecutorVMHelper(); } @Override protected void handleGet(HttpServletRequest req, HttpServletResponse resp, Session session) throws ServletException, IOException { if (hasParam(req, "ajax")) { handleAJAXAction(req, resp, session); } else if (hasParam(req, "days")) { handleHistoryDayPage(req, resp, session); } else if (hasParam(req, "timeline")) { handleHistoryTimelinePage(req, resp, session); } else { handleHistoryPage(req, resp, session); } } private void handleAJAXAction(HttpServletRequest req, HttpServletResponse resp, Session session) throws ServletException, IOException { HashMap<String, Object> ret = new HashMap<String, Object>(); String ajaxName = getParam(req, "ajax"); if (ajaxName.equals("fetch")) { fetchHistoryData(req, resp, ret); } if (ret != null) { this.writeJSON(resp, ret); } } private void fetchHistoryData(HttpServletRequest req, HttpServletResponse resp, HashMap<String, Object> ret) throws ServletException { } private void handleHistoryPage(HttpServletRequest req, HttpServletResponse resp, Session session) throws ServletException { Page page = newPage(req, resp, session, "azkaban/webapp/servlet/velocity/historypage.vm"); int pageNum = getIntParam(req, "page", 1); int pageSize = getIntParam(req, "size", 16); page.add("vmutils", vmHelper); if (pageNum < 0) { pageNum = 1; } List<ExecutableFlow> history = null; if (hasParam(req, "advfilter")) { String projContain = getParam(req, "projcontain"); String flowContain = getParam(req, "flowcontain"); String userContain = getParam(req, "usercontain"); int status = getIntParam(req, "status"); String begin = getParam(req, "begin"); long beginTime = begin == "" ? -1 : DateTimeFormat.forPattern(FILTER_BY_DATE_PATTERN).parseDateTime(begin).getMillis(); String end = getParam(req, "end"); long endTime = end == "" ? -1 : DateTimeFormat.forPattern(FILTER_BY_DATE_PATTERN).parseDateTime(end).getMillis(); try { history = executorManager.getExecutableFlows(projContain, flowContain, userContain, status, beginTime, endTime, (pageNum - 1) * pageSize, pageSize); } catch (ExecutorManagerException e) { page.add("error", e.getMessage()); } } else if (hasParam(req, "search")) { String searchTerm = getParam(req, "searchterm"); try { history = executorManager.getExecutableFlows(searchTerm, (pageNum - 1) * pageSize, pageSize); } catch (ExecutorManagerException e) { page.add("error", e.getMessage()); } } else { try { history = executorManager.getExecutableFlows((pageNum - 1) * pageSize, pageSize); } catch (ExecutorManagerException e) { e.printStackTrace(); } } page.add("flowHistory", history); page.add("size", pageSize); page.add("page", pageNum); // keep the search terms so that we can navigate to later pages if (hasParam(req, "searchterm") && !getParam(req, "searchterm").equals("")) { page.add("search", "true"); page.add("search_term", getParam(req, "searchterm")); } if (hasParam(req, "advfilter")) { page.add("advfilter", "true"); page.add("projcontain", getParam(req, "projcontain")); page.add("flowcontain", getParam(req, "flowcontain")); page.add("usercontain", getParam(req, "usercontain")); page.add("status", getIntParam(req, "status")); page.add("begin", getParam(req, "begin")); page.add("end", getParam(req, "end")); } if (pageNum == 1) { page.add("previous", new PageSelection(1, pageSize, true, false)); } else { page.add("previous", new PageSelection(pageNum - 1, pageSize, false, false)); } page.add("next", new PageSelection(pageNum + 1, pageSize, false, false)); // Now for the 5 other values. int pageStartValue = 1; if (pageNum > 3) { pageStartValue = pageNum - 2; } page.add("page1", new PageSelection(pageStartValue, pageSize, false, pageStartValue == pageNum)); pageStartValue++; page.add("page2", new PageSelection(pageStartValue, pageSize, false, pageStartValue == pageNum)); pageStartValue++; page.add("page3", new PageSelection(pageStartValue, pageSize, false, pageStartValue == pageNum)); pageStartValue++; page.add("page4", new PageSelection(pageStartValue, pageSize, false, pageStartValue == pageNum)); pageStartValue++; page.add("page5", new PageSelection(pageStartValue, pageSize, false, pageStartValue == pageNum)); pageStartValue++; page.render(); } private void handleHistoryTimelinePage(HttpServletRequest req, HttpServletResponse resp, Session session) { } private void handleHistoryDayPage(HttpServletRequest req, HttpServletResponse resp, Session session) { } public class PageSelection { private int page; private int size; private boolean disabled; private boolean selected; public PageSelection(int page, int size, boolean disabled, boolean selected) { this.page = page; this.size = size; this.disabled = disabled; this.setSelected(selected); } public int getPage() { return page; } public int getSize() { return size; } public boolean getDisabled() { return disabled; } public boolean isSelected() { return selected; } public void setSelected(boolean selected) { this.selected = selected; } } @Override protected void handlePost(HttpServletRequest req, HttpServletResponse resp, Session session) throws ServletException, IOException { } public class ExecutorVMHelper { public String getProjectName(int id) { Project project = projectManager.getProject(id); if (project == null) { return String.valueOf(id); } return project.getName(); } } }