01: /**
02: * Copyright (C) 2006 Google Inc.
03: *
04: * Licensed under the Apache License, Version 2.0 (the "License");
05: * you may not use this file except in compliance with the License.
06: * You may obtain a copy of the License at
07: *
08: * http://www.apache.org/licenses/LICENSE-2.0
09: *
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: */package com.bm.ejb3guice.internal;
16:
17: import java.util.logging.Logger;
18:
19: /**
20: * Enables simple performance monitoring.
21: *
22: * @author crazybob@google.com (Bob Lee)
23: */
24: public class Stopwatch {
25:
26: long start = System.currentTimeMillis();
27:
28: /**
29: * Resets and returns elapsed time in milliseconds.
30: */
31: public long reset() {
32: long now = System.currentTimeMillis();
33: try {
34: return now - start;
35: } finally {
36: start = now;
37: }
38: }
39:
40: /**
41: * Resets and logs elapsed time in milliseconds.
42: */
43: public void resetAndLog(Logger logger, String label) {
44: logger.fine(label + ": " + reset() + "ms");
45: }
46: }
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