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/*
* Copyright (c) 2005, 2012, 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 4486732
* @summary When a remote stub contains a client socket factory and a
* remote invocation is made using that stub, the factory should not
* be held strongly reachable by the RMI implementation forever; in
* particular, after the stub has become unreachable and all
* connections to its endpoint have been closed, then the factory
* should become unreachable too (through the RMI implementation).
* @author Peter Jones
*
* @library ../../testlibrary
* @modules java.rmi/sun.rmi.registry
* java.rmi/sun.rmi.server
* java.rmi/sun.rmi.transport
* java.rmi/sun.rmi.transport.tcp
* @build TestLibrary
* @run main/othervm -Dsun.rmi.transport.connectionTimeout=2000
* PinClientSocketFactory
*/
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.Serializable;
import java.lang.ref.Reference;
import java.lang.ref.WeakReference;
import java.net.ServerSocket;
import java.net.Socket;
import java.rmi.Remote;
import java.rmi.RemoteException;
import java.rmi.registry.LocateRegistry;
import java.rmi.registry.Registry;
import java.rmi.server.RMIClientSocketFactory;
import java.rmi.server.RMIServerSocketFactory;
import java.rmi.server.UnicastRemoteObject;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.concurrent.atomic.AtomicInteger;
public class PinClientSocketFactory {
private static final int SESSIONS = 50;
public interface Factory extends Remote {
Session getSession() throws RemoteException;
}
public interface Session extends Remote {
void ping() throws RemoteException;
}
private static class FactoryImpl implements Factory {
FactoryImpl() { }
public Session getSession() throws RemoteException {
Session impl = new SessionImpl();
UnicastRemoteObject.exportObject(impl, 0, new CSF(), new SSF());
// return impl instead of stub to work around 4114579
return impl;
}
}
private static class SessionImpl implements Session {
SessionImpl() { }
public void ping() { }
}
public static void main(String[] args) throws Exception {
System.err.println("\nRegression test for bug 4486732\n");
Factory factoryImpl = new FactoryImpl();
Factory factoryStub =
(Factory) UnicastRemoteObject.exportObject(factoryImpl, 0);
for (int i = 0; i < SESSIONS; i++) {
Session session = factoryStub.getSession();
session.ping();
}
UnicastRemoteObject.unexportObject(factoryImpl, true);
Registry registryImpl = TestLibrary.createRegistryOnEphemeralPort();
int port = TestLibrary.getRegistryPort(registryImpl);
System.out.println("Registry listening on port " + port);
CSF csf = new CSF();
Reference<CSF> registryRef = new WeakReference<CSF>(csf);
Registry registryStub = LocateRegistry.getRegistry("", port, csf);
csf = null;
registryStub.list();
registryStub = null;
UnicastRemoteObject.unexportObject(registryImpl, true);
System.gc();
// allow connections to time out
Thread.sleep(3 * Long.getLong("sun.rmi.transport.connectionTimeout",
15000));
System.gc();
if (CSF.deserializedInstances.size() != SESSIONS) {
throw new Error("unexpected number of deserialized instances: " +
CSF.deserializedInstances.size());
}
int nonNullCount = 0;
for (Reference<CSF> ref : CSF.deserializedInstances) {
csf = ref.get();
if (csf != null) {
System.err.println("non-null deserialized instance: " + csf);
nonNullCount++;
}
}
if (nonNullCount > 0) {
throw new Error("TEST FAILED: " +
nonNullCount + " non-null deserialized instances");
}
csf = registryRef.get();
if (csf != null) {
System.err.println("non-null registry instance: " + csf);
throw new Error("TEST FAILED: non-null registry instance");
}
System.err.println("TEST PASSED");
}
private static class CSF implements RMIClientSocketFactory, Serializable {
static final List<Reference<CSF>> deserializedInstances =
Collections.synchronizedList(new ArrayList<Reference<CSF>>());
private static final AtomicInteger count = new AtomicInteger(0);
private int num = count.incrementAndGet();
CSF() { }
public Socket createSocket(String host, int port) throws IOException {
return new Socket(host, port);
}
public int hashCode() {
return num;
}
public boolean equals(Object obj) {
return obj instanceof CSF && ((CSF) obj).num == num;
}
private void readObject(ObjectInputStream in)
throws IOException, ClassNotFoundException
{
in.defaultReadObject();
deserializedInstances.add(new WeakReference<CSF>(this));
}
}
private static class SSF implements RMIServerSocketFactory {
SSF() { }
public ServerSocket createServerSocket(int port) throws IOException {
return new ServerSocket(port);
}
}
}
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