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/*
* Copyright (c) 2013, 2015, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
import java.lang.management.ManagementFactory;
import java.lang.ref.WeakReference;
import java.lang.reflect.Field;
import java.util.Collections;
import java.util.Map;
import javax.management.MBeanServer;
import javax.management.MBeanServerConnection;
import javax.management.remote.JMXConnector;
import javax.management.remote.JMXConnectorFactory;
import javax.management.remote.JMXConnectorServer;
import javax.management.remote.JMXConnectorServerFactory;
import javax.management.remote.JMXPrincipal;
import javax.management.remote.JMXServiceURL;
import javax.management.remote.rmi.RMIConnector;
import javax.security.auth.Subject;
/*
* @test
* @bug 6566891
* @summary Check no memory leak on RMIConnector's rmbscMap
* @author Shanliang JIANG
* @modules java.management.rmi/javax.management.remote.rmi:open
* @run clean RMIConnectorInternalMapTest
* @run build RMIConnectorInternalMapTest
* @run main RMIConnectorInternalMapTest
*/
public class RMIConnectorInternalMapTest {
public static void main(String[] args) throws Exception {
System.out.println("---RMIConnectorInternalMapTest starting...");
JMXConnectorServer connectorServer = null;
JMXConnector connectorClient = null;
try {
MBeanServer mserver = ManagementFactory.getPlatformMBeanServer();
JMXServiceURL serverURL = new JMXServiceURL("rmi", "localhost", 0);
connectorServer = JMXConnectorServerFactory.newJMXConnectorServer(serverURL, null, mserver);
connectorServer.start();
JMXServiceURL serverAddr = connectorServer.getAddress();
connectorClient = JMXConnectorFactory.connect(serverAddr, null);
connectorClient.connect();
Field rmbscMapField = RMIConnector.class.getDeclaredField("rmbscMap");
rmbscMapField.setAccessible(true);
Map<Subject, WeakReference<MBeanServerConnection>> map =
(Map<Subject, WeakReference<MBeanServerConnection>>) rmbscMapField.get(connectorClient);
if (map != null && !map.isEmpty()) { // failed
throw new RuntimeException("RMIConnector's rmbscMap must be empty at the initial time.");
}
Subject delegationSubject =
new Subject(true,
Collections.singleton(new JMXPrincipal("delegate")),
Collections.EMPTY_SET,
Collections.EMPTY_SET);
MBeanServerConnection mbsc1 =
connectorClient.getMBeanServerConnection(delegationSubject);
MBeanServerConnection mbsc2 =
connectorClient.getMBeanServerConnection(delegationSubject);
if (mbsc1 == null) {
throw new RuntimeException("Got null connection.");
}
if (mbsc1 != mbsc2) {
throw new RuntimeException("Not got same connection with a same subject.");
}
map = (Map<Subject, WeakReference<MBeanServerConnection>>) rmbscMapField.get(connectorClient);
if (map == null || map.isEmpty()) { // failed
throw new RuntimeException("RMIConnector's rmbscMap has wrong size "
+ "after creating a delegated connection.");
}
delegationSubject = null;
mbsc1 = null;
mbsc2 = null;
int i = 0;
while (!map.isEmpty() && i++ < 60) {
System.gc();
Thread.sleep(100);
}
System.out.println("---GC times: " + i);
if (!map.isEmpty()) {
throw new RuntimeException("Failed to clean RMIConnector's rmbscMap");
} else {
System.out.println("---RMIConnectorInternalMapTest: PASSED!");
}
} finally {
try {
connectorClient.close();
connectorServer.stop();
} catch (Exception e) {
}
}
}
}
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