Bug6989440.java revision 12057:5d60882157c9
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 21 * questions. 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