2
|
1 |
/*
|
|
2 |
* Copyright 2003 Sun Microsystems, Inc. All Rights Reserved.
|
|
3 |
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
|
|
4 |
*
|
|
5 |
* This code is free software; you can redistribute it and/or modify it
|
|
6 |
* under the terms of the GNU General Public License version 2 only, as
|
|
7 |
* published by the Free Software Foundation.
|
|
8 |
*
|
|
9 |
* This code is distributed in the hope that it will be useful, but WITHOUT
|
|
10 |
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
11 |
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
|
|
12 |
* version 2 for more details (a copy is included in the LICENSE file that
|
|
13 |
* accompanied this code).
|
|
14 |
*
|
|
15 |
* You should have received a copy of the GNU General Public License version
|
|
16 |
* 2 along with this work; if not, write to the Free Software Foundation,
|
|
17 |
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
|
|
18 |
*
|
|
19 |
* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
|
|
20 |
* CA 95054 USA or visit www.sun.com if you need additional information or
|
|
21 |
* have any questions.
|
|
22 |
*/
|
|
23 |
|
|
24 |
/*
|
|
25 |
* @test
|
|
26 |
* @bug 4858522
|
|
27 |
* @summary Basic unit test of HotspotClassLoadingMBean.getClassLoadingTime()
|
|
28 |
* @author Steve Bohne
|
|
29 |
* @build ClassToLoad0
|
|
30 |
*/
|
|
31 |
|
|
32 |
/*
|
|
33 |
* This test is just a sanity check and does not check for the correct value.
|
|
34 |
*/
|
|
35 |
|
|
36 |
import java.io.*;
|
|
37 |
import sun.management.*;
|
|
38 |
|
|
39 |
public class GetClassLoadingTime {
|
|
40 |
|
|
41 |
private static HotspotClassLoadingMBean mbean =
|
|
42 |
(HotspotClassLoadingMBean)ManagementFactory.getHotspotClassLoadingMBean();
|
|
43 |
|
|
44 |
// Careful with these values.
|
|
45 |
private static final long MIN_TIME_FOR_PASS = 1;
|
|
46 |
private static final long MAX_TIME_FOR_PASS = Long.MAX_VALUE;
|
|
47 |
|
|
48 |
private static boolean trace = false;
|
|
49 |
|
|
50 |
public static void main(String args[]) throws Exception {
|
|
51 |
if (args.length > 0 && args[0].equals("trace")) {
|
|
52 |
trace = true;
|
|
53 |
}
|
|
54 |
|
|
55 |
long time = mbean.getClassLoadingTime();
|
|
56 |
|
|
57 |
if (trace) {
|
|
58 |
System.out.println("Class loading time (ms): " + time);
|
|
59 |
}
|
|
60 |
|
|
61 |
if (time < MIN_TIME_FOR_PASS || time > MAX_TIME_FOR_PASS) {
|
|
62 |
throw new RuntimeException("Class loading time " +
|
|
63 |
"illegal value: " + time + " ms " +
|
|
64 |
"(MIN = " + MIN_TIME_FOR_PASS + "; " +
|
|
65 |
"MAX = " + MAX_TIME_FOR_PASS + ")");
|
|
66 |
}
|
|
67 |
|
|
68 |
// Load some classes to increase the time
|
|
69 |
for (int i = 0; i < 1000; i++) {
|
|
70 |
Class.forName("ClassToLoad0", true, new KlassLoader());
|
|
71 |
}
|
|
72 |
|
|
73 |
long time2 = mbean.getClassLoadingTime();
|
|
74 |
long count = mbean.getLoadedClassCount();
|
|
75 |
|
|
76 |
if (trace) {
|
|
77 |
System.out.println("(new count is " + count + ")");
|
|
78 |
System.out.println("Class loading time2 (ms): " + time2);
|
|
79 |
}
|
|
80 |
|
|
81 |
if (time2 <= time) {
|
|
82 |
throw new RuntimeException("Class loading time " +
|
|
83 |
"did not increase when class loaded" +
|
|
84 |
"(time = " + time + "; " +
|
|
85 |
"time2 = " + time2 + ")");
|
|
86 |
}
|
|
87 |
|
|
88 |
System.out.println("Test passed.");
|
|
89 |
}
|
|
90 |
}
|
|
91 |
|
|
92 |
// KlassLoader exists to load classes without a parent classloader,
|
|
93 |
// so we can avoid delegation and spend lots of time loading the
|
|
94 |
// same class over and over, to test the class loading timer.
|
|
95 |
class KlassLoader extends ClassLoader {
|
|
96 |
static String klassDir="";
|
|
97 |
static int index=0;
|
|
98 |
|
|
99 |
public KlassLoader() {
|
|
100 |
super(null);
|
|
101 |
}
|
|
102 |
|
|
103 |
protected synchronized Class findClass(String name)
|
|
104 |
throws ClassNotFoundException {
|
|
105 |
String cname = klassDir
|
|
106 |
+ (klassDir == "" ? "" : "/")
|
|
107 |
+name.replace('.', '/')
|
|
108 |
+".class";
|
|
109 |
|
|
110 |
FileInputStream in;
|
|
111 |
try {
|
|
112 |
in=new FileInputStream(cname);
|
|
113 |
if (in == null) {
|
|
114 |
throw new ClassNotFoundException("getResourceAsStream("
|
|
115 |
+cname+")");
|
|
116 |
}
|
|
117 |
} catch(java.io.FileNotFoundException e ) {
|
|
118 |
throw new ClassNotFoundException("getResourceAsStream("
|
|
119 |
+cname+") : "
|
|
120 |
+e);
|
|
121 |
}
|
|
122 |
|
|
123 |
int len;
|
|
124 |
byte data[];
|
|
125 |
try {
|
|
126 |
len = in.available();
|
|
127 |
data = new byte[len];
|
|
128 |
for (int total = 0; total < data.length; ) {
|
|
129 |
total += in.read(data, total, data.length - total);
|
|
130 |
}
|
|
131 |
} catch (IOException e) {
|
|
132 |
throw new ClassNotFoundException(cname, e);
|
|
133 |
} finally {
|
|
134 |
try {
|
|
135 |
in.close();
|
|
136 |
} catch (IOException e) {
|
|
137 |
}
|
|
138 |
}
|
|
139 |
|
|
140 |
return defineClass(name, data, 0, data.length);
|
|
141 |
}
|
|
142 |
}
|