1 package org.apache.fulcrum.yaafi.interceptor.javasimon;
2
3 /*
4 * Licensed to the Apache Software Foundation (ASF) under one
5 * or more contributor license agreements. See the NOTICE file
6 * distributed with this work for additional information
7 * regarding copyright ownership. The ASF licenses this file
8 * to you under the Apache License, Version 2.0 (the
9 * "License"); you may not use this file except in compliance
10 * with the License. You may obtain a copy of the License at
11 *
12 * http://www.apache.org/licenses/LICENSE-2.0
13 *
14 * Unless required by applicable law or agreed to in writing,
15 * software distributed under the License is distributed on an
16 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
17 * KIND, either express or implied. See the License for the
18 * specific language governing permissions and limitations
19 * under the License.
20 */
21
22 import java.lang.reflect.Method;
23
24 import org.apache.fulcrum.yaafi.interceptor.util.MethodToStringBuilderImpl;
25 import org.javasimon.SimonManager;
26 import org.javasimon.Split;
27 import org.javasimon.Stopwatch;
28
29 /**
30 * Encapsulating the JAMon 2.x related API calls. JAMon 2.x allows for a much
31 * more powerful integration with Avalon services :
32 * <ul>
33 * <li>custom ranges/units</li>
34 * <li>exception monitoring</li>
35 * <li>smooth web interface</li>
36 * </ul>
37 *
38 * @since 1.0.7
39 * @author <a href="mailto:siegfried.goeschl@it20one.at">Siegfried Goeschl</a>
40 */
41
42 public class JavaSimon4PerformanceMonitorImpl implements JavaSimonPerformanceMonitor
43 {
44 /** is monitoring enabled */
45 private boolean isActive;
46
47 /** the method currently monitored */
48 private Method method;
49
50 /** the split for this invocation */
51 private Split split;
52
53 /**
54 * Constructor.
55 *
56 * @param serviceName the service name of the service being monitored
57 * @param method the method to be monitored
58 * @param isActive is this an active monitor
59 */
60 public JavaSimon4PerformanceMonitorImpl(String serviceName, Method method, Boolean isActive)
61 {
62 this.method = method;
63 this.isActive = isActive.booleanValue();
64 }
65
66 /**
67 * Start the monitor.
68 */
69 public void start()
70 {
71 if(this.isActive)
72 {
73 String methodSignature = createMethodSignature(this.method, 0);
74 Stopwatch stopwatch = SimonManager.getStopwatch(methodSignature);
75 this.split = stopwatch.start();
76 }
77 }
78
79 /**
80 * Stop the monitor
81 */
82 public void stop()
83 {
84 if(this.isActive)
85 {
86 this.split.stop();
87 }
88 }
89
90 /**
91 * Stop the monitor
92 */
93 public void stop(Throwable throwable)
94 {
95 if(this.isActive)
96 {
97 this.split.stop();
98 }
99 }
100
101 /**
102 * Create a method signature - JavaSimon does not look names with '#' in it.
103 */
104 private String createMethodSignature(Method method, int mode)
105 {
106 MethodToStringBuilderImpl methodToStringBuilder = new MethodToStringBuilderImpl(method, mode);
107 return methodToStringBuilder.toString().replace("#", "[]");
108 }
109 }