1 /* 2 * Copyright (c) 2011, 2015, 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 /* @test 25 * @bug 7068328 26 * @summary Test if getObjectName handles properly when called by 27 * multiple threads simultaneously. Run in othervm mode to 28 * make sure the object name is not initialized to begin with. 29 * 30 * @run main/othervm GetObjectName 31 */ 32 33 import java.lang.management.BufferPoolMXBean; 34 import java.lang.management.ManagementFactory; 35 import java.lang.management.PlatformLoggingMXBean; 36 import java.lang.management.PlatformManagedObject; 37 import java.util.ArrayList; 38 import java.util.List; 39 import java.util.concurrent.ExecutorService; 40 import java.util.concurrent.Executors; 41 import java.util.concurrent.LinkedBlockingQueue; 42 import java.util.concurrent.TimeUnit; 43 44 public class GetObjectName { 45 private static boolean failed = false; 46 public static void main(String[] args) throws Exception { 47 int tasks = 10000; 48 ExecutorService executor = Executors.newFixedThreadPool(10); 49 submitTasks(executor, tasks); 50 executor.shutdown(); 51 executor.awaitTermination(10, TimeUnit.SECONDS); 52 if (!failed) { 53 System.out.println("Test passed."); 54 } 55 } 56 57 static void submitTasks(ExecutorService executor, int count) { 58 for (int i=0; i < count && !failed; i++) { 59 executor.execute(new Runnable() { 60 @Override 61 public void run() { 62 List<PlatformManagedObject> mbeans = new ArrayList<>(); 63 mbeans.add(ManagementFactory.getPlatformMXBean(PlatformLoggingMXBean.class)); 64 mbeans.addAll(ManagementFactory.getPlatformMXBeans(BufferPoolMXBean.class)); 65 for (PlatformManagedObject pmo : mbeans) { 66 // Name should not be null 67 if (pmo.getObjectName() == null) { 68 failed = true; 69 throw new RuntimeException("TEST FAILED: getObjectName() returns null"); 70 } 71 } 72 } 73 }); 74 } 75 } 76 }