1/*
2 * Copyright (c) 2010, 2012, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
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22 */
23
24/*
25 * @test
26 * @bug 6989440
27 * @summary Verify ConcurrentModificationException is not thrown with multiple
28 *     thread accesses.
29 * @modules java.base/sun.util.locale.provider
30 * @compile -XDignore.symbol.file=true Bug6989440.java
31 * @run main Bug6989440
32 */
33import java.text.spi.DateFormatProvider;
34import java.util.spi.LocaleNameProvider;
35import java.util.spi.LocaleServiceProvider;
36import java.util.spi.TimeZoneNameProvider;
37
38import sun.util.locale.provider.LocaleServiceProviderPool;
39
40public class Bug6989440 {
41    static volatile boolean failed;  // false
42    static final int THREADS = 50;
43
44    public static void main(String[] args) throws Exception {
45        Thread[] threads = new Thread[THREADS];
46        for (int i=0; i<threads.length; i++)
47            threads[i] = new TestThread();
48        for (int i=0; i<threads.length; i++)
49            threads[i].start();
50        for (int i=0; i<threads.length; i++)
51            threads[i].join();
52
53        if (failed)
54            throw new RuntimeException("Failed: check output");
55    }
56
57    static class TestThread extends Thread {
58        private Class<? extends LocaleServiceProvider> cls;
59        private static int count;
60
61        public TestThread(Class<? extends LocaleServiceProvider> providerClass) {
62            cls = providerClass;
63        }
64
65        public TestThread() {
66            int which = count++ % 3;
67            switch (which) {
68                case 0 : cls = LocaleNameProvider.class; break;
69                case 1 : cls = TimeZoneNameProvider.class; break;
70                case 2 : cls = DateFormatProvider.class; break;
71                default : throw new AssertionError("Should not reach here");
72            }
73        }
74
75        public void run() {
76            try {
77                LocaleServiceProviderPool pool = LocaleServiceProviderPool.getPool(cls);
78                pool.getAvailableLocales();
79            } catch (Exception e) {
80                System.out.println(e);
81                e.printStackTrace();
82                failed = true;
83            }
84        }
85    }
86}
87