content: /**
   * 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
   * <p/>
   * http://www.apache.org/licenses/LICENSE-2.0
   * <p/>
   * 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 com.alibaba.jstorm.utils;
  
  import backtype.storm.utils.Time;
  import com.alibaba.jstorm.metric.AsmWindow;
  
  import java.text.SimpleDateFormat;
  import java.util.Calendar;
  import java.util.Date;
  
  /**
   * Time utils
   *
   * @author yannian
   */
  @SuppressWarnings("unused")
  public class TimeUtils {
  
      public static final long NS_PER_MS = 1000000L;
  
      /**
       * Take care of int overflow
       */
      public static int current_time_secs() {
          return (int) (Time.currentTimeMillis() / 1000);
      }
  
      /**
       * Take care of int overflow
       */
      public static int time_delta(int time_secs) {
          return current_time_secs() - time_secs;
      }
  
      public static long time_delta_ms(long time_ms) {
          return System.currentTimeMillis() - time_ms;
      }
  
      public static final long MS_PER_SEC = 1000l;
      public static final long NS_PER_US = 1000l;
      public static final long US_PER_MS = 1000l;
  
      public static final int ONE_SEC = 1;
      public static final int SEC_PER_MIN = 60;
      public static final int SEC_PER_DAY = 86400;
  
      public static boolean isTimeAligned() {
          return current_time_secs() % SEC_PER_DAY % SEC_PER_MIN == 0;
      }
  
      public static int secOffset() {
          return current_time_secs() % SEC_PER_DAY % SEC_PER_MIN;
      }
  
      public static int secOffset(long ts) {
          return (int) (ts % SEC_PER_DAY % SEC_PER_MIN);
      }
  
      public static int winSecOffset(long ts, int window) {
          return (int) (ts / 1000 % SEC_PER_DAY % window);
      }
  
      public static long alignTimeToWin(long ts, int win) {
          if (win != AsmWindow.D1_WINDOW) {
              long curTimeSec = ts / 1000;
              return (curTimeSec - curTimeSec % win) * 1000;
          } else {
              Calendar cal = Calendar.getInstance();
              cal.setTimeInMillis(ts);
              int year = cal.get(Calendar.YEAR);
              int month = cal.get(Calendar.MONTH);
              int day = cal.get(Calendar.DAY_OF_MONTH);
              int hour = cal.get(Calendar.HOUR);
              int min = cal.get(Calendar.MINUTE);
              int sec = cal.get(Calendar.SECOND);
              if (sec + min + hour > 0) {
                  cal.set(year, month, day + 1, 0, 0, 0);
              }
              return cal.getTimeInMillis();
          }
      }
  
      public static long alignTimeToMin(long ts) {
          return alignTimeToWin(ts, AsmWindow.M1_WINDOW);
      }
  
      public static String toTimeStr(Date time) {
          int hour = time.getHours();
          int min = time.getMinutes();
          StringBuilder sb = new StringBuilder();
          if (hour < 10) {
              sb.append(0).append(hour);
          } else {
              sb.append(hour);
          }
          sb.append(":");
          if (min < 10) {
              sb.append(0).append(min);
          } else {
              sb.append(min);
          }
          return sb.toString();
      }
  
      public static String format(int curTimeSec) {
          return format(new Date(curTimeSec * 1000L), "yyyy-MM-dd HH:mm:ss");
      }
  
      public static String format(Date time, String fmt) {
          SimpleDateFormat df = new SimpleDateFormat(fmt);
          return df.format(time);
      }
  
  
      public static void main(String[] args) throws Exception {
          System.out.println(new Date(alignTimeToWin(System.currentTimeMillis(), AsmWindow.M1_WINDOW)));
          System.out.println(new Date(alignTimeToWin(System.currentTimeMillis(), AsmWindow.M10_WINDOW)));
          System.out.println(new Date(alignTimeToWin(System.currentTimeMillis(), AsmWindow.H2_WINDOW)));
          System.out.println(new Date(alignTimeToWin(System.currentTimeMillis(), AsmWindow.D1_WINDOW)));
  
          Calendar cal = Calendar.getInstance();
          cal.set(2015, 6, 23, 0, 0, 0);
          System.out.println(new Date(alignTimeToWin(cal.getTimeInMillis(), AsmWindow.D1_WINDOW)));
  
          System.out.println(format(TimeUtils.current_time_secs()));
      }
  }
  