DateUtils.java

package com.linkedin.camus.sweeper.utils;

import java.util.Properties;

import org.joda.time.DateTime;
import org.joda.time.DateTimeZone;
import org.joda.time.format.DateTimeFormat;
import org.joda.time.format.DateTimeFormatter;


public class DateUtils {
  public DateTimeZone zone;
  public DateTimeFormatter minuteFormatter;

  public DateUtils(Properties props) {
    zone = DateTimeZone.forID(props.getProperty("camus.default.timezone", "America/Los_Angeles"));
    minuteFormatter = getDateTimeFormatter("YYYY-MM-dd-HH-mm");
  }

  public DateTimeFormatter getDateTimeFormatter(String str) {
    return DateTimeFormat.forPattern(str).withZone(zone);
  }

  public static long getPartition(long timeGranularityMs, long timestamp) {
    return (timestamp / timeGranularityMs) * timeGranularityMs;
  }

  public DateTime getMidnight() {
    DateTime time = new DateTime(zone);
    return new DateTime(time.getYear(), time.getMonthOfYear(), time.getDayOfMonth(), 0, 0, 0, 0, zone);
  }

  public DateTime getCurrentHour() {
    DateTime time = new DateTime(zone);
    return new DateTime(time.getYear(), time.getMonthOfYear(), time.getDayOfMonth(), time.getHourOfDay(), 0, 0, 0, zone);
  }
}