/*
* Copyright (c) 2008 Wayne Meissner
*
* This file is part of gstreamer-java.
*
* gstreamer-java is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* gstreamer-java 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with gstreamer-java. If not, see <http://www.gnu.org/licenses/>.
*/
package org.gstreamer.lowlevel;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;
import java.lang.ref.Reference;
import java.lang.ref.WeakReference;
import org.gstreamer.Caps;
import org.gstreamer.Gst;
import org.junit.After;
import org.junit.AfterClass;
import org.junit.Before;
import org.junit.BeforeClass;
import org.junit.Test;
/**
*
*/
public class ReferenceManagerTest {
public ReferenceManagerTest() {
}
@BeforeClass
public static void setUpClass() throws Exception {
Gst.init("ReferenceManagerTest", new String[] {});
}
@AfterClass
public static void tearDownClass() throws Exception {
Gst.deinit();
}
@Before
public void setUp() {
}
@After
public void tearDown() {
}
public boolean waitGC(Reference<? extends Object> ref) throws InterruptedException {
System.gc();
for (int i = 0; ref.get() != null && i < 20; ++i) {
Thread.sleep(10);
System.gc();
}
return ref.get() == null;
}
@Test public void testReference() throws Exception {
Object ref = new Object();
Caps target = new Caps("video/x-raw-rgb");
ReferenceManager.addKeepAliveReference(ref, target);
WeakReference<Object> targetRef = new WeakReference<Object>(target);
target = null;
assertFalse("target collected prematurely", waitGC(targetRef));
ref = null;
assertTrue("target not collected when ref is collected", waitGC(targetRef));
}
@Test public void testMultipleReferences() throws Exception {
Object ref1 = new Object();
Object ref2 = new Object();
Caps target = new Caps("video/x-raw-rgb");
ReferenceManager.addKeepAliveReference(ref1, target);
ReferenceManager.addKeepAliveReference(ref2, target);
WeakReference<Object> targetRef = new WeakReference<Object>(target);
target = null;
assertFalse("target collected prematurely", waitGC(targetRef));
ref1 = null;
assertFalse("target collected after only one ref disposed", waitGC(targetRef));
ref2 = null;
assertTrue("target not collected when ref is dispose", waitGC(targetRef));
}
}