Java tutorial
/* * Licensed to the Apache Software Foundation (ASF) under one * or more contributor license agreements. See the NOTICE file * distributed with this work for additional information * regarding copyright ownership. The ASF licenses this file * to you 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 org.apache.hadoop.chukwa.hicc; import javax.servlet.http.*; import org.apache.hadoop.chukwa.util.XssFilter; import java.util.Date; import java.util.Calendar; import java.util.TimeZone; import java.util.StringTokenizer; import java.text.SimpleDateFormat; import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; import com.mdimension.jchronic.Chronic; import com.mdimension.jchronic.Options; import com.mdimension.jchronic.tags.Pointer; import com.mdimension.jchronic.utils.Span; import com.mdimension.jchronic.utils.Time; public class TimeHandler { private HttpSession session = null; private HttpServletRequest request = null; private TimeZone tz = null; private long start = 0; private long end = 0; private String startDate = null; private String startHour = null; private String startMin = null; private String endDate = null; private String endHour = null; private String endMin = null; private String startS = null; private String endS = null; private XssFilter xf = null; private static Log log = LogFactory.getLog(TimeHandler.class); public TimeHandler(HttpServletRequest request) { this.tz = TimeZone.getTimeZone("UTC"); init(request); } public TimeHandler(HttpServletRequest request, String tz) { if (tz != null) { this.tz = TimeZone.getTimeZone(tz); } else { this.tz = TimeZone.getTimeZone("UTC"); } init(request); } /* * Using the Chronic library to parse the english string * and convert it to a long (millis seconds since 1970) */ public long parseDateShorthand(String d) { Calendar now = Calendar.getInstance(); long l = now.getTimeInMillis(); d = d.trim(); if (d.compareToIgnoreCase("now") == 0) { // do nothing because it is default to now. } else { Options options = new Options(false); options.setCompatibilityMode(true); options.setNow(now); try { Span span = Chronic.parse(d, options); l = span.getBegin() * 1000; } catch (Exception e) { // exception when parsing log.error("parse error for: " + d); } } /* * debug */ /* SimpleDateFormat sf = new SimpleDateFormat("yyyy/MM/dd HH:mm:ss"); Date ld=new Date(l); log.error("Convert:"+d+" to "+Long.toString(l)+" - "+sf.format(ld)+ "-"+ld.getTime()); */ return l; } public void parsePeriodValue(String period) { Calendar now = Calendar.getInstance(); this.start = now.getTimeInMillis(); this.end = now.getTimeInMillis(); if (period.equals("last1hr")) { start = end - (60 * 60 * 1000); } else if (period.equals("last2hr")) { start = end - (2 * 60 * 60 * 1000); } else if (period.equals("last3hr")) { start = end - (3 * 60 * 60 * 1000); } else if (period.equals("last6hr")) { start = end - (6 * 60 * 60 * 1000); } else if (period.equals("last12hr")) { start = end - (12 * 60 * 60 * 1000); } else if (period.equals("last24hr")) { start = end - (24 * 60 * 60 * 1000); } else if (period.equals("last7d")) { start = end - (7 * 24 * 60 * 60 * 1000); } else if (period.equals("last30d")) { start = end - (30L * 24 * 60 * 60 * 1000); } else if (period.startsWith("custom;")) { // default value is between 2 days ago and now String startString = "2 days ago"; String endString = "now"; // tokenize the value to "custom;2 days ago;now" StringTokenizer st = new StringTokenizer(period, ";"); if (st.hasMoreTokens()) { st.nextToken(); // skip the first token if (st.hasMoreTokens()) { startString = st.nextToken(); if (st.hasMoreTokens()) { endString = st.nextToken(); } } } // parse the parameter strings start = parseDateShorthand(startString); end = parseDateShorthand(endString); } } public void init(HttpServletRequest request) { xf = new XssFilter(request); Calendar now = Calendar.getInstance(); this.session = request.getSession(); this.request = request; String timeType = "last"; if (request.getParameter("time_type") == null && session.getAttribute("time_type") == null && session.getAttribute("period") == null && request.getParameter("period") == null) { timeType = "last"; end = now.getTimeInMillis(); start = end - 60 * 60 * 1000; session.setAttribute("period", "last1hr"); session.setAttribute("time_type", "last"); session.setAttribute("start", "" + start); session.setAttribute("end", "" + end); } else if (request.getParameter("period") != null && !request.getParameter("period").equals("")) { String period = xf.getParameter("period"); parsePeriodValue(period); } else if (request.getParameter("start") != null && request.getParameter("end") != null) { start = Long.parseLong(request.getParameter("start")); end = Long.parseLong(request.getParameter("end")); } else if (session.getAttribute("time_type").equals("range")) { start = Long.parseLong((String) session.getAttribute("start")); end = Long.parseLong((String) session.getAttribute("end")); } else if (session.getAttribute("time_type").equals("last") && session.getAttribute("period") != null) { String period = (String) session.getAttribute("period"); parsePeriodValue(period); } // if((request.getParameter("period")==null || // request.getParameter("period").equals("")) && // session.getAttribute("time_type")!=null) { // timeType = (String)session.getAttribute("time_type"); // } // if((request.getParameter("period")!=null && // !request.getParameter("period").equals("")) || (timeType!=null && // timeType.equals("last"))) { // String period = request.getParameter("period"); // if(period == null) { // period = (String) session.getAttribute("period"); // if(period == null) { // period = "last1hr"; // session.setAttribute("period",period); // } // } // // no time specified in request nor session, set default time in session. // if(request.getParameter("time_type")!=null && // request.getParameter("time_type").equals("range")) { // session.setAttribute("start", ""+start); // session.setAttribute("end", ""+end); // } // } else { // // no time specified in request, use session time. // start = Long.parseLong((String) session.getAttribute("start")); // end = Long.parseLong((String) session.getAttribute("end")); // } SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd HH:mm"); SimpleDateFormat formatDate = new SimpleDateFormat("yyyy-MM-dd"); SimpleDateFormat formatHour = new SimpleDateFormat("HH"); SimpleDateFormat formatMin = new SimpleDateFormat("mm"); formatter.setTimeZone(this.tz); formatDate.setTimeZone(this.tz); formatHour.setTimeZone(this.tz); formatMin.setTimeZone(this.tz); startS = formatter.format(start); this.startDate = formatDate.format(start); this.startHour = formatHour.format(start); this.startMin = formatMin.format(start); endS = formatter.format(end); this.endDate = formatDate.format(end); this.endHour = formatHour.format(end); this.endMin = formatMin.format(end); } public String getStartDate(String format) { SimpleDateFormat formatter = new SimpleDateFormat(format); formatter.setTimeZone(this.tz); return formatter.format(this.start); } public String getStartDate() { return this.startDate; } public String getStartHour() { return this.startHour; } public String getStartMinute() { return this.startMin; } public String getStartTimeText() { return this.startS; } public long getStartTime() { return start; } public String getEndDate(String format) { SimpleDateFormat formatter = new SimpleDateFormat(format); formatter.setTimeZone(this.tz); return formatter.format(this.end); } public String getEndDate() { return this.endDate; } public String getEndHour() { return this.endHour; } public String getEndMinute() { return this.endMin; } public String getEndTimeText() { return this.endS; } public long getEndTime() { return end; } }