/**
* 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.nutch.util;
import java.text.NumberFormat;
public class TimingUtil {
private static long[] TIME_FACTOR = { 60 * 60 * 1000, 60 * 1000, 1000 };
/**
* Calculate the elapsed time between two times specified in milliseconds.
* @param start The start of the time period
* @param end The end of the time period
* @return a string of the form "XhYmZs" when the elapsed time is X hours, Y minutes and Z seconds or null if start > end.
*/
public static String elapsedTime(long start, long end){
if (start > end) {
return null;
}
long[] elapsedTime = new long[TIME_FACTOR.length];
for (int i = 0; i < TIME_FACTOR.length; i++) {
elapsedTime[i] = start > end ? -1 : (end - start) / TIME_FACTOR[i];
start += TIME_FACTOR[i] * elapsedTime[i];
}
NumberFormat nf = NumberFormat.getInstance();
nf.setMinimumIntegerDigits(2);
StringBuffer buf = new StringBuffer();
for (int i = 0; i < elapsedTime.length; i++) {
if (i > 0) {
buf.append(":");
}
buf.append(nf.format(elapsedTime[i]));
}
return buf.toString();
}
}