1 /*
2 * Copyright (c) 2012, 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 7120365
27 * @summary test on Concurrent Modification
28 * @author Shanliang JIANG
29 * @run main ConcurrentModificationTest
30 */
31
32 import java.net.MalformedURLException;
33 import java.util.ConcurrentModificationException;
34 import javax.management.MBeanServer;
35 import javax.management.MBeanServerConnection;
36 import javax.management.MBeanServerFactory;
37 import javax.management.Notification;
38 import javax.management.NotificationListener;
39 import javax.management.ObjectName;
40 import javax.management.remote.JMXConnector;
41 import javax.management.remote.JMXConnectorFactory;
42 import javax.management.remote.JMXConnectorServer;
43 import javax.management.remote.JMXConnectorServerFactory;
44 import javax.management.remote.JMXServiceURL;
45
46 /**
47 *
48 */
49 public class ConcurrentModificationTest {
50 private static final String[] protocols = {"rmi", "iiop", "jmxmp"};
51 private static int number = 100;
52
53 private static final MBeanServer mbs = MBeanServerFactory.createMBeanServer();
54 private static ObjectName delegateName;
55 private static ObjectName[] timerNames = new ObjectName[number];
56 private static NotificationListener[] listeners = new NotificationListener[number];
57
58 private static Throwable uncaughtException = null;
59
60 public static void main(String[] args) throws Exception {
61 System.out.println(">>> test on Concurrent Modification.");
62
63 Thread.setDefaultUncaughtExceptionHandler(new Thread.UncaughtExceptionHandler() {
64 @Override
65 public void uncaughtException(Thread t, Throwable e) {
66 e.printStackTrace();
67 if (e instanceof ConcurrentModificationException) {
68 uncaughtException = e;
69 }
70 }
71 });
72
73 delegateName = new ObjectName("JMImplementation:type=MBeanServerDelegate");
74 for (int i=0; i<number; i++) {
75 timerNames[i] = new ObjectName("MBean:name=Timer"+i);
76 listeners[i] = new NotificationListener() {
77 @Override
78 public void handleNotification(Notification notification, Object handback) {
79 // nothing
80 }
81 };
82 }
83 String errors = "";
84
85 for (int i = 0; i < protocols.length; i++) {
86 uncaughtException = null;
87 System.out.println(">>> Test for protocol " + protocols[i]);
88 test(protocols[i]);
89 if (uncaughtException != null) {
90 if ("".equals(errors)) {
91 errors = "Failed to " + protocols[i] + ": "+uncaughtException;
92 } else {
93 errors = errors+", failed to " + protocols[i] + ": "+uncaughtException;
94 }
95 System.out.println(">>> FAILED for protocol " + protocols[i]);
96 } else {
97 System.out.println(">>> PASSED for protocol " + protocols[i]);
98 }
99 }
100
101 if ("".equals(errors)) {
102 System.out.println("All Passed!");
103 } else {
104 System.out.println("!!!!!! Failed.");
105
106 throw new RuntimeException(errors);
107 }
108 }
109
110 private static void test(String proto) throws Exception {
111 JMXServiceURL u = new JMXServiceURL(proto, null, 0);
112 JMXConnectorServer server;
113 JMXConnector client;
114
115 try {
116 server =
117 JMXConnectorServerFactory.newJMXConnectorServer(u, null, mbs);
118 server.start();
119 JMXServiceURL addr = server.getAddress();
120 client = JMXConnectorFactory.connect(addr, null);
121 } catch (MalformedURLException e) {
122 System.out.println(">>> not support: " + proto);
123 return;
124 }
125
126 final MBeanServerConnection mserver = client.getMBeanServerConnection();
127
128 int count = 0;
129 boolean adding = true;
130 while (uncaughtException == null && count++ < 10) {
131 for (int i = 0; i < number; i++) {
132 listenerOp(mserver, listeners[i], adding);
133 mbeanOp(mserver, timerNames[i], adding);
134 }
135 adding = !adding;
136 }
137
138 if (uncaughtException != null) { // clean
139 for (int i = 0; i < number; i++) {
140 try {
141 mbeanOp(mserver, timerNames[i], false);
142 } catch (Exception e) {
143 }
144 }
145 }
146 client.close();
147 server.stop();
148 }
149
150 private static void mbeanOp(MBeanServerConnection mserver, ObjectName name, boolean adding)
151 throws Exception {
152 if (adding) {
153 mserver.createMBean("javax.management.timer.Timer", name);
154 } else {
155 mserver.unregisterMBean(name);
156 }
157 }
158
159 private static void listenerOp(MBeanServerConnection mserver, NotificationListener listener, boolean adding)
160 throws Exception {
161 if (adding) {
162 mserver.addNotificationListener(delegateName, listener, null, null);
163 } else {
164 mserver.removeNotificationListener(delegateName, listener);
165 }
166 }
167 }