/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
* @author Salikh Zakirov
* @version $Revision: 1.7.8.1.4.4 $
*/
package gc;
import java.lang.ref.PhantomReference;
import java.lang.ref.Reference;
import java.lang.ref.ReferenceQueue;
public class PhantomReferenceQueueTest {
static boolean passed = false;
public static void main(String[] args) {
final ReferenceQueue queue = new ReferenceQueue();
final Reference ref = new PhantomReference(new PhantomReferenceTest(), queue);
System.gc();
Thread x = new Thread() {
public void run() {
try {
queue.remove();
passed = true;
synchronized (PhantomReferenceTest.class) {
PhantomReferenceTest.class.notify();
}
} catch (InterruptedException e) {}
}
};
x.setDaemon(true); x.start();
synchronized (PhantomReferenceTest.class) {
try {
PhantomReferenceTest.class.wait(5000);
} catch (InterruptedException e) {}
}
System.out.println("Reference itself is at " + ref);
if (passed)
System.out.println("PASS");
else
System.out.println("FAIL, reference not enqueued after 5 second wait");
}
}