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/*
* Copyright (c) 2004, 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
* @summary Basic functional test of remove method for ThreadLocal
* @author Seetharama Avadhanam
*/
public class TLRemoveTest {
private static final int INITIAL_VALUE = 101;
private static final int REMOVE_SET_VALUE = 102;
static ThreadLocal<Integer> n = new ThreadLocal<Integer>() {
protected synchronized Integer initialValue() {
return INITIAL_VALUE;
}
};
public static void main(String args[]) throws Throwable {
int threadCount = 100;
final int[] removeNode = {10,20,45,38};
// ThreadLocal values will be removed for these threads.
final int[] removeAndSet = {12,34,10};
// ThreadLocal values will be removed and sets new values..
Thread th[] = new Thread[threadCount];
final int x[] = new int[threadCount];
final Throwable exceptions[] = new Throwable[threadCount];
for(int i = 0; i<threadCount; i++) {
final int threadId = i;
th[i] = new Thread() {
public void run() {
try{
n.set(threadId); // Sets threadId as threadlocal value...
for (int j = 0; j<threadId; j++)
Thread.currentThread().yield();
// To remove the ThreadLocal ....
for(int removeId : removeNode)
if(threadId == removeId){
n.remove(); // Removes ThreadLocal values..
break;
}
// To remove the ThreadLocal value and set new value ...
for(int removeId : removeAndSet)
if(threadId == removeId){
n.remove(); // Removes the ThreadLocal Value...
n.set(REMOVE_SET_VALUE); /* Setting new Values to
ThreadLocal */
break;
}
/* Storing the threadlocal values in 'x'
...so that it can be used for checking results... */
x[threadId] = n.get();
}
catch(Throwable ex){
exceptions[threadId] = ex;
}
}
};
th[i].start();
}
// Wait for the threads to finish
for(int i = 0; i<threadCount; i++)
th[i].join();
// Check results
for(int i = 0; i<threadCount; i++){
int checkValue = i;
/* If the remove method is called then the ThreadLocal value will
* be its initial value */
for(int removeId : removeNode)
if(removeId == i){
checkValue = INITIAL_VALUE;
break;
}
for(int removeId : removeAndSet)
if(removeId == i){
checkValue = REMOVE_SET_VALUE;
break;
}
if(exceptions[i] != null)
throw(exceptions[i]);
if(x[i] != checkValue)
throw(new Throwable("x[" + i + "] =" + x[i]));
}
}
}
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