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/*
* 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.
*/
/*
* This file is available under and governed by the GNU General Public
* License version 2 only, as published by the Free Software Foundation.
* However, the following notice accompanied the original version of this
* file:
*
* Written by Doug Lea with assistance from members of JCP JSR-166
* Expert Group and released to the public domain, as explained at
* http://creativecommons.org/publicdomain/zero/1.0/
* Other contributors include Andrew Wright, Jeffrey Hayes,
* Pat Fisher, Mike Judd.
*/
import junit.framework.Test;
import junit.framework.TestSuite;
public class ThreadLocalTest extends JSR166TestCase {
public static void main(String[] args) {
main(suite(), args);
}
public static Test suite() {
return new TestSuite(ThreadLocalTest.class);
}
static ThreadLocal<Integer> tl = new ThreadLocal<Integer>() {
public Integer initialValue() {
return one;
}
};
static InheritableThreadLocal<Integer> itl =
new InheritableThreadLocal<Integer>() {
protected Integer initialValue() {
return zero;
}
protected Integer childValue(Integer parentValue) {
return new Integer(parentValue.intValue() + 1);
}
};
/**
* remove causes next access to return initial value
*/
public void testRemove() {
assertSame(tl.get(), one);
tl.set(two);
assertSame(tl.get(), two);
tl.remove();
assertSame(tl.get(), one);
}
/**
* remove in InheritableThreadLocal causes next access to return
* initial value
*/
public void testRemoveITL() {
assertSame(itl.get(), zero);
itl.set(two);
assertSame(itl.get(), two);
itl.remove();
assertSame(itl.get(), zero);
}
private class ITLThread extends Thread {
final int[] x;
ITLThread(int[] array) { x = array; }
public void run() {
Thread child = null;
if (itl.get().intValue() < x.length - 1) {
child = new ITLThread(x);
child.start();
}
Thread.yield();
int threadId = itl.get().intValue();
for (int j = 0; j < threadId; j++) {
x[threadId]++;
Thread.yield();
}
if (child != null) { // Wait for child (if any)
try {
child.join();
} catch (InterruptedException e) {
threadUnexpectedException(e);
}
}
}
}
/**
* InheritableThreadLocal propagates generic values.
*/
public void testGenericITL() throws InterruptedException {
final int threadCount = 10;
final int[] x = new int[threadCount];
Thread progenitor = new ITLThread(x);
progenitor.start();
progenitor.join();
for (int i = 0; i < threadCount; i++) {
assertEquals(i, x[i]);
}
}
}
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