1/* 2 * Copyright (c) 2006, 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/* 25 * @test 26 * @bug 6417044 27 * @summary Test that a failing MBean registration does not lead to a deadlock 28 * @author Eamonn McManus 29 * 30 * @run main PostRegisterDeadlockTest2 31 */ 32 33import javax.management.*; 34 35public class PostRegisterDeadlockTest2 { 36 private static String failed; 37 38 public static interface EmptyMBean {} 39 40 public static class Empty implements EmptyMBean, MBeanRegistration { 41 public ObjectName preRegister(MBeanServer mbs, ObjectName on) { 42 this.mbs = mbs; 43 this.on = on; 44 return on; 45 } 46 public void postRegister(Boolean done) { 47 Thread t = new Thread() { 48 public void run() { 49 if (!mbs.isRegistered(on)) 50 failed = "Not registered!"; 51 } 52 }; 53 t.start(); 54 try { 55 t.join(5000L); 56 } catch (InterruptedException e) { 57 failed = "Interrupted: " + e; 58 } 59 if (t.isAlive()) 60 failed = "Deadlock detected"; 61 } 62 public void preDeregister() {} 63 public void postDeregister() {} 64 65 private MBeanServer mbs; 66 private ObjectName on; 67 } 68 69 public static void main(String[] args) throws Exception { 70 MBeanServer mbs = MBeanServerFactory.newMBeanServer(); 71 ObjectName on = new ObjectName("a:b=c"); 72 mbs.registerMBean(new Empty(), on); 73 try { 74 mbs.registerMBean(new Empty(), on); 75 throw new Exception("FAILED: did not get expected exception"); 76 } catch (InstanceAlreadyExistsException e) { 77 System.out.println("OK: got expected exception"); 78 } 79 if (failed != null) 80 throw new Exception("FAILED: " + failed); 81 System.out.println("TEST PASSED"); 82 } 83} 84