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