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/*
* Copyright (c) 2017, 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.
*/
/*
* @test
* @bug 6515161
* @summary checks the behaviour of mbeanServerConnection.removeNotificationListener
* operation when there is a exception thrown during removal
* @modules java.management
* @run main NoPermToRemoveTest
*/
import java.lang.management.ManagementFactory;
import java.security.AllPermission;
import java.security.CodeSource;
import java.security.Permission;
import java.security.PermissionCollection;
import java.security.Permissions;
import java.security.Policy;
import java.security.ProtectionDomain;
import java.util.concurrent.Semaphore;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicInteger;
import javax.management.ListenerNotFoundException;
import javax.management.MBeanPermission;
import javax.management.MBeanServer;
import javax.management.MBeanServerConnection;
import javax.management.Notification;
import javax.management.NotificationBroadcasterSupport;
import javax.management.NotificationFilter;
import javax.management.NotificationListener;
import javax.management.ObjectName;
import javax.management.remote.JMXConnector;
import javax.management.remote.JMXConnectorFactory;
import javax.management.remote.JMXConnectorServer;
import javax.management.remote.JMXConnectorServerFactory;
import javax.management.remote.JMXServiceURL;
public class NoPermToRemoveTest {
public static void main(String[] args) throws Exception {
Policy.setPolicy(new NoRemovePolicy());
System.setSecurityManager(new SecurityManager());
JMXServiceURL url = new JMXServiceURL("service:jmx:rmi:///");
MBeanServer mbs = ManagementFactory.getPlatformMBeanServer();
ObjectName name = new ObjectName("foo:type=Sender");
mbs.registerMBean(new Sender(), name);
JMXConnectorServer cs = JMXConnectorServerFactory.newJMXConnectorServer(
url, null, mbs);
cs.start();
try {
JMXServiceURL addr = cs.getAddress();
JMXConnector cc = JMXConnectorFactory.connect(addr);
MBeanServerConnection mbsc = cc.getMBeanServerConnection();
SnoopListener listener = new SnoopListener();
mbsc.addNotificationListener(name, listener, null, null);
mbsc.invoke(name, "send", null, null);
if (!listener.waitForNotification(60))
throw new Exception("Did not receive expected notification");
try {
mbsc.removeNotificationListener(name, listener);
throw new Exception("RemoveNL did not get SecurityException");
} catch (SecurityException e) {
System.out.println("removeNL got expected exception: " + e);
}
mbsc.invoke(name, "send", null, null);
if (!listener.waitForNotification(60)) {
int listenerCount =
(Integer) mbsc.getAttribute(name, "ListenerCount");
System.out.println("Listener count: " + listenerCount);
if (listenerCount != 0)
throw new Exception("TEST FAILED");
/* We did not receive the notification, but the MBean still
* has a listener coming from the connector server, which
* means the connector server still thinks there is a
* listener. If we retained the listener after the failing
* removeNL that would be OK, and if the listener were
* dropped by both client and server that would be OK too,
* but the inconsistency is not OK.
*/
}
cc.close();
} finally {
cs.stop();
}
}
private static class SnoopListener implements NotificationListener {
private Semaphore sema = new Semaphore(0);
public void handleNotification(Notification notification, Object handback) {
System.out.println("Listener got: " + notification);
sema.release();
}
boolean waitForNotification(int seconds) throws InterruptedException {
return sema.tryAcquire(seconds, TimeUnit.SECONDS);
}
}
private static class NoRemovePolicy extends Policy {
public PermissionCollection getPermissions(CodeSource codesource) {
PermissionCollection pc = new Permissions();
pc.add(new AllPermission());
return pc;
}
public void refresh() {
}
public boolean implies(ProtectionDomain domain, Permission permission) {
if (!(permission instanceof MBeanPermission))
return true;
MBeanPermission jmxp = (MBeanPermission) permission;
if (jmxp.getActions().contains("removeNotificationListener")) {
System.out.println("DENIED");
return false;
}
return true;
}
}
public static interface SenderMBean {
public void send();
public int getListenerCount();
}
public static class Sender extends NotificationBroadcasterSupport
implements SenderMBean {
private AtomicInteger listenerCount = new AtomicInteger();
public void send() {
System.out.println("Sending notif");
sendNotification(new Notification("type", this, 0L));
}
public synchronized int getListenerCount() {
return listenerCount.get();
}
public void removeNotificationListener(
NotificationListener listener,
NotificationFilter filter,
Object handback) throws ListenerNotFoundException {
System.out.println("Sender.removeNL(3)");
super.removeNotificationListener(listener, filter, handback);
listenerCount.decrementAndGet();
}
public void addNotificationListener(
NotificationListener listener,
NotificationFilter filter,
Object handback) {
System.out.println("Sender.addNL(3)");
super.addNotificationListener(listener, filter, handback);
listenerCount.incrementAndGet();
}
public void removeNotificationListener(NotificationListener listener)
throws ListenerNotFoundException {
System.out.println("Sender.removeNL(1)");
super.removeNotificationListener(listener);
listenerCount.decrementAndGet();
}
}
}
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