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/*
* Copyright (c) 2005, 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 6232010
* @summary this test checks that replacing SoftCache class with ConcurrentMap
* in ObjectInputStream/ObjectOutputStream gives an opportunity to
* classes which are inherited from OIS and OOS and loaded through
* separete ClassLoaders be available for garbage collection
*
* @author Andrey Ozerov
* @run main/othervm/policy=security.policy SubclassGC
*/
import java.io.*;
import java.lang.ref.Reference;
import java.lang.ref.ReferenceQueue;
import java.lang.ref.WeakReference;
import java.lang.reflect.Constructor;
import java.net.URL;
import java.net.URLClassLoader;
public class SubclassGC {
private static final long TIMEOUT = 1000;
public static final void main(String[] args) throws Exception {
System.err.println("\n Regression test for bug 6232010\n");
if (System.getSecurityManager() == null) {
System.setSecurityManager(new SecurityManager());
}
ClassLoader systemLoader = ClassLoader.getSystemClassLoader();
URL testClassesURL = new File(System.getProperty("test.classes")).toURI().toURL();
ClassLoader loader = new URLClassLoader(new URL[] { testClassesURL } ,
systemLoader.getParent());
Class<? extends ObjectOutputStream> cl =
Class.forName(SubclassOfOOS.class.getName(), false,
loader).asSubclass(ObjectOutputStream.class);
Constructor<? extends ObjectOutputStream> cons =
cl.getConstructor(OutputStream.class);
OutputStream os = new ByteArrayOutputStream();
ObjectOutputStream obj = cons.newInstance(os);
final ReferenceQueue<Class<?>> queue = new ReferenceQueue<Class<?>>();
WeakReference<Class<?>> ref = new WeakReference<Class<?>>(cl, queue);
cl = null;
obj = null;
loader = null;
cons = null;
systemLoader = null;
System.err.println("\nStart Garbage Collection right now");
System.gc();
Reference<? extends Class<?>> dequeued = queue.remove(TIMEOUT);
if (dequeued == ref) {
System.err.println("\nTEST PASSED");
} else {
throw new Error();
}
}
}
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