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Java > Open Source Codes > org > springframework > aop > interceptor > PerformanceMonitorInterceptor


1 /*
2  * Copyright 2002-2006 the original author or authors.
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 org.springframework.aop.interceptor;
18
19 import org.aopalliance.intercept.MethodInvocation;
20 import org.apache.commons.logging.Log;
21
22 import org.springframework.util.StopWatch;
23
24 /**
25  * Simple AOP Alliance <code>MethodInterceptor</code> for performance monitoring.
26  * This interceptor has no effect on the intercepted method call.
27  *
28  * <p>Uses a <code>StopWatch</code> for the actual performance measuring.
29  *
30  * @author Rod Johnson
31  * @author Dmitriy Kopylenko
32  * @author Rob Harrop
33  * @see org.springframework.util.StopWatch
34  * @see JamonPerformanceMonitorInterceptor
35  */
36 public class PerformanceMonitorInterceptor extends AbstractMonitoringInterceptor {
37
38     /**
39      * Create a new PerformanceMonitorInterceptor with a static logger.
40      */
41     public PerformanceMonitorInterceptor() {
42     }
43
44     /**
45      * Create a new PerformanceMonitorInterceptor with a dynamic or static logger,
46      * according to the given flag.
47      * @param useDynamicLogger whether to use a dynamic logger or a static logger
48      * @see #setUseDynamicLogger
49      */
50     public PerformanceMonitorInterceptor(boolean useDynamicLogger) {
51         setUseDynamicLogger(useDynamicLogger);
52     }
53
54
55     protected Object JavaDoc invokeUnderTrace(MethodInvocation invocation, Log logger) throws Throwable JavaDoc {
56         String JavaDoc name = createInvocationTraceName(invocation);
57         StopWatch stopWatch = new StopWatch(name);
58         stopWatch.start(name);
59         try {
60             return invocation.proceed();
61         }
62         finally {
63             stopWatch.stop();
64             logger.trace(stopWatch.shortSummary());
65         }
66     }
67
68 }
69
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