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/*
* Copyright (c) 2010, 2023, 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 6989440
* @summary Verify ConcurrentModificationException is not thrown with multiple
* thread accesses.
* @modules java.base/sun.util.locale.provider
* @compile -XDignore.symbol.file=true ProviderPoolMultiThreadAccess.java
* @run junit ProviderPoolMultiThreadAccess
*/
import java.text.spi.DateFormatProvider;
import java.util.spi.LocaleNameProvider;
import java.util.spi.LocaleServiceProvider;
import java.util.spi.TimeZoneNameProvider;
import sun.util.locale.provider.LocaleServiceProviderPool;
import org.junit.jupiter.api.Test;
public class ProviderPoolMultiThreadAccess {
static volatile boolean failed; // false
static final int THREADS = 50;
/* Multiple instances of Locale Service Provider Pool calling
* getAvailableLocales() should not throw ConcurrentModificationException
*/
@Test
public void multiThreadAccessTest() throws Exception {
Thread[] threads = new Thread[THREADS];
for (int i=0; i<threads.length; i++)
threads[i] = new TestThread();
for (int i=0; i<threads.length; i++)
threads[i].start();
for (int i=0; i<threads.length; i++)
threads[i].join();
if (failed)
throw new RuntimeException("Failed: check output");
}
static class TestThread extends Thread {
private Class<? extends LocaleServiceProvider> cls;
private static int count;
public TestThread() {
int which = count++ % 3;
switch (which) {
case 0 -> cls = LocaleNameProvider.class;
case 1 -> cls = TimeZoneNameProvider.class;
case 2 -> cls = DateFormatProvider.class;
default -> throw new AssertionError("Should not reach here");
}
}
public void run() {
try {
LocaleServiceProviderPool pool = LocaleServiceProviderPool.getPool(cls);
pool.getAvailableLocales();
} catch (Exception e) {
System.out.println(e);
e.printStackTrace();
failed = true;
}
}
}
}
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