/*

 * 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.

 *

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/*

 * @test

 * @bug 6989440

 * @summary Verify ConcurrentModificationException is not thrown with multiple

 *     thread accesses.

 * @compile -XDignore.symbol.file=true Bug6989440.java

 * @run main Bug6989440

 */

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;

public class Bug6989440 {

    static volatile boolean failed;  // false

    static final int THREADS = 50;

    public static void main(String[] args) 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(Class<? extends LocaleServiceProvider> providerClass) {

            cls = providerClass;

        }

        public TestThread() {

            int which = count++ % 3;

            switch (which) {

                case 0 : cls = LocaleNameProvider.class; break;

                case 1 : cls = TimeZoneNameProvider.class; break;

                case 2 : cls = DateFormatProvider.class; break;

                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;

            }

        }

    }

}