1 /*
2 * Copyright (c) 2012, 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 7120365
27 * @summary test on Concurrent Modification
28 * @author Shanliang JIANG
29 * @modules java.management.rmi
30 * @run main ConcurrentModificationTest
31 */
32
33 import java.net.MalformedURLException;
34 import java.util.ConcurrentModificationException;
35 import javax.management.MBeanServer;
36 import javax.management.MBeanServerConnection;
37 import javax.management.MBeanServerFactory;
38 import javax.management.Notification;
39 import javax.management.NotificationListener;
40 import javax.management.ObjectName;
41 import javax.management.remote.JMXConnector;
42 import javax.management.remote.JMXConnectorFactory;
43 import javax.management.remote.JMXConnectorServer;
44 import javax.management.remote.JMXConnectorServerFactory;
45 import javax.management.remote.JMXServiceURL;
46
47 /**
48 *
49 */
50 public class ConcurrentModificationTest {
51 private static final String[] protocols = {"rmi", "iiop", "jmxmp"};
52 private static int number = 100;
53
54 private static final MBeanServer mbs = MBeanServerFactory.createMBeanServer();
55 private static ObjectName delegateName;
56 private static ObjectName[] timerNames = new ObjectName[number];
57 private static NotificationListener[] listeners = new NotificationListener[number];
58
59 private static Throwable uncaughtException = null;
60
61 public static void main(String[] args) throws Exception {
62 System.out.println(">>> test on Concurrent Modification.");
63
64 Thread.setDefaultUncaughtExceptionHandler(new Thread.UncaughtExceptionHandler() {
65 @Override
66 public void uncaughtException(Thread t, Throwable e) {
67 e.printStackTrace();
68 if (e instanceof ConcurrentModificationException) {
69 uncaughtException = e;
70 }
71 }
72 });
73
74 delegateName = new ObjectName("JMImplementation:type=MBeanServerDelegate");
75 for (int i=0; i<number; i++) {
76 timerNames[i] = new ObjectName("MBean:name=Timer"+i);
77 listeners[i] = new NotificationListener() {
78 @Override
79 public void handleNotification(Notification notification, Object handback) {
80 // nothing
81 }
82 };
83 }
84 String errors = "";
85
86 for (int i = 0; i < protocols.length; i++) {
87 uncaughtException = null;
88 System.out.println(">>> Test for protocol " + protocols[i]);
89 test(protocols[i]);
90 if (uncaughtException != null) {
91 if ("".equals(errors)) {
92 errors = "Failed to " + protocols[i] + ": "+uncaughtException;
93 } else {
94 errors = errors+", failed to " + protocols[i] + ": "+uncaughtException;
95 }
96 System.out.println(">>> FAILED for protocol " + protocols[i]);
97 } else {
98 System.out.println(">>> PASSED for protocol " + protocols[i]);
99 }
100 }
101
102 if ("".equals(errors)) {
103 System.out.println("All Passed!");
104 } else {
105 System.out.println("!!!!!! Failed.");
106
107 throw new RuntimeException(errors);
108 }
109 }
110
111 private static void test(String proto) throws Exception {
112 JMXServiceURL u = new JMXServiceURL(proto, null, 0);
113 JMXConnectorServer server;
114 JMXConnector client;
115
116 try {
117 server =
118 JMXConnectorServerFactory.newJMXConnectorServer(u, null, mbs);
119 server.start();
120 JMXServiceURL addr = server.getAddress();
121 client = JMXConnectorFactory.connect(addr, null);
122 } catch (MalformedURLException e) {
123 System.out.println(">>> not support: " + proto);
124 return;
125 }
126
127 final MBeanServerConnection mserver = client.getMBeanServerConnection();
128
129 int count = 0;
130 boolean adding = true;
131 while (uncaughtException == null && count++ < 10) {
132 for (int i = 0; i < number; i++) {
133 listenerOp(mserver, listeners[i], adding);
134 mbeanOp(mserver, timerNames[i], adding);
135 }
136 adding = !adding;
137 }
138
139 if (uncaughtException != null) { // clean
140 for (int i = 0; i < number; i++) {
141 try {
142 mbeanOp(mserver, timerNames[i], false);
143 } catch (Exception e) {
144 }
145 }
146 }
147 client.close();
148 server.stop();
149 }
150
151 private static void mbeanOp(MBeanServerConnection mserver, ObjectName name, boolean adding)
152 throws Exception {
153 if (adding) {
154 mserver.createMBean("javax.management.timer.Timer", name);
155 } else {
156 mserver.unregisterMBean(name);
157 }
158 }
159
160 private static void listenerOp(MBeanServerConnection mserver, NotificationListener listener, boolean adding)
161 throws Exception {
162 if (adding) {
163 mserver.addNotificationListener(delegateName, listener, null, null);
164 } else {
165 mserver.removeNotificationListener(delegateName, listener);
166 }
167 }
168 }