src/main/java/org/apache/hadoop/chukwa/extraction/demux/processor/Util.java

/*
 * 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.extraction.demux.processor;


import java.text.SimpleDateFormat;
import java.util.Calendar;

public class Util {
  static SimpleDateFormat day = new java.text.SimpleDateFormat("yyyyMMdd");

  static Calendar calendar = Calendar.getInstance();
  static int currentDay = 0;
  static int currentHour = 0;

  static {
    synchronized (calendar) {
      calendar.setTimeInMillis(System.currentTimeMillis());
      currentDay = Integer.parseInt(day.format(calendar.getTime()));
      currentHour = calendar.get(Calendar.HOUR_OF_DAY);
    }
  }

  public static String generateTimeOutput(long timestamp) {
    int workingDay = 0;
    int workingHour = 0;

    String output = null;

    int minutes = 0;
    synchronized (calendar) {
      calendar.setTimeInMillis(timestamp);
      workingDay = Integer.parseInt(day.format(calendar.getTime()));
      workingHour = calendar.get(Calendar.HOUR_OF_DAY);
      minutes = calendar.get(Calendar.MINUTE);
    }

    if (workingDay != currentDay) {
      output = "_" + workingDay + ".D.evt";
    } else {
      if (workingHour != currentHour) {
        output = "_" + workingDay + "_" + workingHour + ".H.evt";
      } else {
        output = "_" + workingDay + "_" + workingHour + "_";
        int dec = minutes / 10;
        output += dec;

        int m = minutes - (dec * 10);
        if (m < 5) {
          output += "0.R.evt";
        } else {
          output += "5.R.evt";
        }
      }
    }

    return output;
  }
}