89 lines
3.1 KiB
Java
89 lines
3.1 KiB
Java
/*
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* Copyright (c) 2010, 2023, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/*
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* @test
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* @bug 6989440
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* @summary Verify ConcurrentModificationException is not thrown with multiple
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* thread accesses.
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* @modules java.base/sun.util.locale.provider
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* @compile -XDignore.symbol.file=true ProviderPoolMultiThreadAccess.java
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* @run junit ProviderPoolMultiThreadAccess
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*/
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import java.text.spi.DateFormatProvider;
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import java.util.spi.LocaleNameProvider;
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import java.util.spi.LocaleServiceProvider;
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import java.util.spi.TimeZoneNameProvider;
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import sun.util.locale.provider.LocaleServiceProviderPool;
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import org.junit.jupiter.api.Test;
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public class ProviderPoolMultiThreadAccess {
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static volatile boolean failed; // false
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static final int THREADS = 50;
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/* Multiple instances of Locale Service Provider Pool calling
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* getAvailableLocales() should not throw ConcurrentModificationException
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*/
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@Test
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public void multiThreadAccessTest() throws Exception {
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Thread[] threads = new Thread[THREADS];
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for (int i=0; i<threads.length; i++)
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threads[i] = new TestThread();
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for (int i=0; i<threads.length; i++)
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threads[i].start();
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for (int i=0; i<threads.length; i++)
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threads[i].join();
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if (failed)
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throw new RuntimeException("Failed: check output");
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}
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static class TestThread extends Thread {
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private Class<? extends LocaleServiceProvider> cls;
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private static int count;
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public TestThread() {
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int which = count++ % 3;
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switch (which) {
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case 0 -> cls = LocaleNameProvider.class;
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case 1 -> cls = TimeZoneNameProvider.class;
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case 2 -> cls = DateFormatProvider.class;
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default -> throw new AssertionError("Should not reach here");
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}
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}
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public void run() {
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try {
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LocaleServiceProviderPool pool = LocaleServiceProviderPool.getPool(cls);
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pool.getAvailableLocales();
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} catch (Exception e) {
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System.out.println(e);
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e.printStackTrace();
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failed = true;
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}
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}
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}
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}
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