1 /**
2 * Copyright 2003-2006 Greg Luck
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 package net.sf.ehcache;
18
19 /**
20 * @author Greg Luck
21 * @version $Id: StopWatch.java 28 2006-04-15 05:12:32Z gregluck $
22 * A stop watch that can be useful for instrumenting for performance
23 */
24 public class StopWatch {
25
26 private static final String SUFFIX = "ms";
27
28 /**
29 * Used for performance benchmarking
30 */
31 private long timeStamp = System.currentTimeMillis();
32
33
34 /**
35 * Gets the time elapsed between now and for the first time, the creation
36 * time of the class, and after that, between each call to this method
37 */
38 public long getElapsedTime() {
39 long now = System.currentTimeMillis();
40 long elapsed = now - timeStamp;
41 timeStamp = now;
42 return elapsed;
43 }
44
45 /**
46 * @return formatted elapsed Time
47 */
48 public String getElapsedTimeString() {
49 return String.valueOf(getElapsedTime()) + SUFFIX;
50 }
51
52 }
53
54