001package org.apache.commons.jcs3.utils.timing; 002 003/* 004 * Licensed to the Apache Software Foundation (ASF) under one 005 * or more contributor license agreements. See the NOTICE file 006 * distributed with this work for additional information 007 * regarding copyright ownership. The ASF licenses this file 008 * to you under the Apache License, Version 2.0 (the 009 * "License"); you may not use this file except in compliance 010 * with the License. You may obtain a copy of the License at 011 * 012 * http://www.apache.org/licenses/LICENSE-2.0 013 * 014 * Unless required by applicable law or agreed to in writing, 015 * software distributed under the License is distributed on an 016 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 017 * KIND, either express or implied. See the License for the 018 * specific language governing permissions and limitations 019 * under the License. 020 */ 021 022/** 023 * This is a simple timer utility. 024 */ 025public class ElapsedTimer 026{ 027 /** display suffix describing the unit of measure. */ 028 private static final String SUFFIX = "ms."; 029 030 /** 031 * Sets the start time when created. 032 */ 033 private long timeStamp = System.currentTimeMillis(); 034 035 /** 036 * Gets the time elapsed between the start time and now. The start time is reset to now. 037 * Subsequent calls will get the time between then and now. 038 * <p> 039 * @return the elapsed time 040 */ 041 public long getElapsedTime() 042 { 043 final long now = System.currentTimeMillis(); 044 final long elapsed = now - timeStamp; 045 timeStamp = now; 046 return elapsed; 047 } 048 049 /** 050 * Returns the elapsed time with the display suffix. 051 * <p> 052 * @return formatted elapsed Time 053 */ 054 public String getElapsedTimeString() 055 { 056 return String.valueOf( getElapsedTime() ) + SUFFIX; 057 } 058}