1 /*
2 * Copyright (c) 2004, 2015 Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
23
24 /*
25 * @test
26 * @bug 4969756
27 * @summary Test that the same native library coming from the same jar file can
28 * be loaded twice by two different MLets on the same JVM without conflict.
29 * @author Luis-Miguel Alventosa
30 *
31 * @run clean LibraryLoaderTest
32 * @run build LibraryLoaderTest
33 * @run main/othervm LibraryLoaderTest
34 */
35
36 import java.io.File;
37 import java.util.Set;
38 import javax.management.Attribute;
39 import javax.management.MBeanServer;
40 import javax.management.MBeanServerFactory;
41 import javax.management.ObjectInstance;
42 import javax.management.ObjectName;
43 import javax.management.ReflectionException;
44
45 public class LibraryLoaderTest {
46
47 private static final String mletInfo[][] = {
48 {"testDomain:type=MLet,index=0", "UseNativeLib0.html"},
49 {"testDomain:type=MLet,index=1", "UseNativeLib1.html"}
50 };
51
52 public static void main(String args[]) throws Exception {
53
54 String osName = System.getProperty("os.name");
55 System.out.println("os.name=" + osName);
56 String osArch = System.getProperty("os.arch");
57 System.out.println("os.name=" + osArch);
58
59 // Check for supported platforms:
60 //
61 // Solaris/SPARC and Windows/x86
62 //
63 if ((!(osName.equals("SunOS") && osArch.equals("sparc"))) &&
64 (!(osName.startsWith("Windows") && osArch.equals("x86")))) {
65 System.out.println(
66 "This test runs only on Solaris/SPARC and Windows/x86 platforms");
67 System.out.println("Bye! Bye!");
68 return;
69 }
70
71 String libPath = System.getProperty("java.library.path");
72 System.out.println("java.library.path=" + libPath);
73 String testSrc = System.getProperty("test.src");
74 System.out.println("test.src=" + testSrc);
75 String workingDir = System.getProperty("user.dir");
76 System.out.println("user.dir=" + workingDir);
77
78 String urlCodebase;
79 if (testSrc.startsWith("/")) {
80 urlCodebase =
81 "file:" + testSrc.replace(File.separatorChar, '/') + "/";
82 } else {
83 urlCodebase =
84 "file:/" + testSrc.replace(File.separatorChar, '/') + "/";
85 }
86
87 // Create MBeanServer
88 //
89 MBeanServer server = MBeanServerFactory.newMBeanServer();
90
91 // Create MLet instances and call getRandom on the loaded MBeans
92 //
93 for (int i = 0; i < mletInfo.length; i++) {
94 // Create ObjectName for MLet
95 //
96 ObjectName mlet = new ObjectName(mletInfo[i][0]);
97 server.createMBean("javax.management.loading.MLet", mlet);
98 System.out.println("MLet = " + mlet);
99
100 // Display old library directory and set it to test.classes
101 //
102 String libraryDirectory =
103 (String) server.getAttribute(mlet, "LibraryDirectory");
104 System.out.println("Old Library Directory = " +
105 libraryDirectory);
106 Attribute attribute =
107 new Attribute("LibraryDirectory", workingDir);
108 server.setAttribute(mlet, attribute);
109 libraryDirectory =
110 (String) server.getAttribute(mlet, "LibraryDirectory");
111 System.out.println("New Library Directory = " +
112 libraryDirectory);
113
114 // Get MBeans from URL
115 //
116 String mletURL = urlCodebase + mletInfo[i][1];
117 System.out.println("MLet URL = " + mletURL);
118 Object[] params = new Object[] { mletURL };
119 String[] signature = new String[] {"java.lang.String"};
120 Object res[] = ((Set<?>) server.invoke(mlet,
121 "getMBeansFromURL",
122 params,
123 signature)).toArray();
124
125 // Iterate through all the loaded MBeans
126 //
127 for (int j = 0; j < res.length; j++) {
128 // Now ensure none of the returned objects is a Throwable
129 //
130 if (res[j] instanceof Throwable) {
131 ((Throwable) res[j]).printStackTrace(System.out);
132 throw new Exception("Failed to load the MBean #" + j
133 ,(Throwable)res[j]);
134 }
135
136 // On each of the loaded MBeans, try to invoke their
137 // native operation
138 //
139 Object result = null;
140 try {
141 ObjectName mbean =
142 ((ObjectInstance) res[j]).getObjectName();
143 result = server.getAttribute(mbean, "Random");
144 System.out.println("MBean #" + j + " = " + mbean);
145 System.out.println("Random number = " + result);
146 } catch (ReflectionException e) {
147 e.getTargetException().printStackTrace(System.out);
148 throw new Exception ("A ReflectionException "
149 + "occured when attempting to invoke "
150 + "a native library based operation.",
151 e.getTargetException());
152 }
153 }
154 }
155 }
156 }