Bug6989440.java revision 4635:829c3a8d23fa 
1/*
2 * Copyright (c) 2010, 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
21 * questions.
22 */
23
24/*
25 * @test
26 * @bug 6989440
27 * @summary Verify ConcurrentModificationException is not thrown with multiple
28 *     thread accesses.
29 * @compile -XDignore.symbol.file=true Bug6989440.java
30 * @run main Bug6989440
31 */
32import java.text.spi.DateFormatProvider;
33import java.util.spi.LocaleNameProvider;
34import java.util.spi.LocaleServiceProvider;
35import java.util.spi.TimeZoneNameProvider;
36
37import sun.util.LocaleServiceProviderPool;
38
39public class Bug6989440 {
40    static volatile boolean failed;  // false
41    static final int THREADS = 50;
42
43    public static void main(String[] args) throws Exception {
44        Thread[] threads = new Thread[THREADS];
45        for (int i=0; i<threads.length; i++)
46            threads[i] = new TestThread();
47        for (int i=0; i<threads.length; i++)
48            threads[i].start();
49        for (int i=0; i<threads.length; i++)
50            threads[i].join();
51
52        if (failed)
53            throw new RuntimeException("Failed: check output");
54    }
55
56    static class TestThread extends Thread {
57        private Class<? extends LocaleServiceProvider> cls;
58        private static int count;
59
60        public TestThread(Class<? extends LocaleServiceProvider> providerClass) {
61            cls = providerClass;
62        }
63
64        public TestThread() {
65            int which = count++ % 3;
66            switch (which) {
67                case 0 : cls = LocaleNameProvider.class; break;
68                case 1 : cls = TimeZoneNameProvider.class; break;
69                case 2 : cls = DateFormatProvider.class; break;
70                default : throw new AssertionError("Should not reach here");
71            }
72        }
73
74        public void run() {
75            try {
76                LocaleServiceProviderPool pool = LocaleServiceProviderPool.getPool(cls);
77                pool.getAvailableLocales();
78            } catch (Exception e) {
79                System.out.println(e);
80                e.printStackTrace();
81                failed = true;
82            }
83        }
84    }
85}
86