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1 package org.incava.qualog;
2
3 import java.util.*;
4
5
6 public class QlTimer
7 {
8 private List periods = null;
9
10 public QlTimer()
11 {
12 periods = new ArrayList();
13 }
14
15 public boolean start()
16 {
17 return start(null);
18 }
19
20 public boolean end()
21 {
22 return end(null);
23 }
24
25 public boolean start(String  msg)
26 {
27 StackTraceElement ste = getFrame();
28
29 String className = ste.getClassName();
30 String methodName = ste.getMethodName();
31 int lineNumber = ste.getLineNumber();
32 String fileName = ste.getFileName();
33
34 QlTimedPeriod qtp = new QlTimedPeriod(fileName, className, methodName, lineNumber, msg);
35 periods.add(qtp);
36
37 return true;
38 }
39
40 public boolean end(String msg)
41 {
42 long endTime = System.currentTimeMillis();
43
44 StackTraceElement ste = getFrame();
45
46
48 String className = ste.getClassName();
49 String methodName = ste.getMethodName();
50 int lineNumber = ste.getLineNumber();
51 String fileName = ste.getFileName();
52 int bestMatchIdx = -1;
53 int bestMatchness = -1;
54
55 Iterator it = periods.iterator();
56 for (int idx = 0; it.hasNext(); ++idx) {
57 Object obj = it.next();
58 QlTimedPeriod qtp = (QlTimedPeriod)obj;
59 int matchness = 0;
60
61 matchness += qtp.getMessage() != null && msg.equals(qtp.getMessage()) ? 1 : 0;
62 matchness += className.equals(qtp.getClassName()) ? 1 : 0;
63 matchness += fileName.equals(qtp.getFileName()) ? 1 : 0;
64 matchness += methodName.equals(qtp.getMethodName()) ? 1 : 0;
65
66 if (matchness >= bestMatchness) {
68 bestMatchness = matchness;
69 bestMatchIdx = idx;
70 }
71 }
72
73
76 if (bestMatchIdx >= 0) {
77 QlTimedPeriod qtp = (QlTimedPeriod)periods.remove(bestMatchIdx);
78 long elapsed = endTime - qtp.getStartTime();
79 StringBuffer buf = new StringBuffer ();
80
81 buf.append(format(elapsed));
82 buf.append("; ");
83
84 if (msg != null) {
85 buf.append(msg);
86 buf.append("; ");
87 }
88
89 buf.append("from: [");
90 buf.append(fileName);
91 buf.append(":");
92 buf.append(Integer.toString(lineNumber));
93 buf.append("]");
94 buf.append(" ");
95
96 buf.append("{");
97 buf.append(className);
98 buf.append("#");
99 buf.append(methodName);
100 buf.append("}");
101
102 Qualog.log(buf.toString());
103 }
104 else {
105 System.err.println("ERROR no matching start!");
106 }
107
108 return true;
109 }
110
111 protected StackTraceElement getFrame()
112 {
113 StackTraceElement [] stack = (new Exception ("")).getStackTrace();
114 int stIdx = Qualog.findStackStart(stack);
115 StackTraceElement ste = stack[stIdx];
116
117 return ste;
118 }
119
120 public String format(long duration)
121 {
122 StringBuffer buf = new StringBuffer ();
123 if (duration < 10000) {
124 buf.append(Long.toString(duration));
125 buf.append(" ms");
126 }
127 else if (duration < 100000) {
128 double nSecs = duration / 1000.0;
129 buf.append(Double.toString(nSecs));
130 buf.append(" sec");
131 }
132 else if (duration < 1000000) {
133 double nMin = Math.floor(duration / (60 * 1000.0));
134 double nSec = (duration - 60.0 * nMin) / 1000.0;
135 buf.append(Double.toString(nMin));
136 buf.append(":");
137 buf.append(Double.toString(nSec));
138 }
139 else {
140 buf.append(Long.toString(duration));
142 }
143 return buf.toString();
144 }
145
146 }
147 |
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