1 /* 2 * Copyright (c) 2001, 2008, 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 4308492 26 * @summary In addition to keeping the VM alive (with a non-daeman thread) 27 * while there are remote objects exported, the RMI runtime should also 28 * keep it alive while there remain calls in progress (to remote objects 29 * the have presumably been unexported), so that a remote object can more 30 * conveniently implement a graceful remote shutdown method (that unexports 31 * the object). 32 * @author Peter Jones 33 * 34 * @library ../../../testlibrary 35 * @build TestLibrary 36 * @build JavaVM 37 * @build KeepAliveDuringCall 38 * @build KeepAliveDuringCall_Stub 39 * @build ShutdownMonitor 40 * @build Shutdown 41 * @build ShutdownImpl 42 * @build ShutdownImpl_Stub 43 * @run main/othervm KeepAliveDuringCall 44 */ 45 46 import java.rmi.Remote; 47 import java.rmi.RemoteException; 48 import java.rmi.registry.LocateRegistry; 49 import java.rmi.registry.Registry; 50 import java.rmi.server.UnicastRemoteObject; 51 52 public class KeepAliveDuringCall implements ShutdownMonitor { 53 54 public static final String BINDING = "KeepAliveDuringCall"; 55 private static final int TIMEOUT = 20000; 56 57 private Object lock = new Object(); 58 private Shutdown shutdown = null; 59 private boolean stillAlive = false; 60 61 public void submitShutdown(Shutdown shutdown) { 62 synchronized (lock) { 63 this.shutdown = shutdown; 64 lock.notifyAll(); 65 } 66 } 67 68 public void declareStillAlive() { 69 synchronized (lock) { 70 stillAlive = true; 71 lock.notifyAll(); 72 } 73 } 74 75 public static void main(String[] args) { 76 77 System.err.println("\nRegression test for bug 4308492\n"); 78 79 KeepAliveDuringCall obj = new KeepAliveDuringCall(); 80 81 try { 82 UnicastRemoteObject.exportObject(obj); 83 System.err.println("exported shutdown monitor"); 84 85 Registry localRegistry = 86 LocateRegistry.createRegistry(TestLibrary.REGISTRY_PORT); 87 System.err.println("created local registry"); 88 89 localRegistry.bind(BINDING, obj); 90 System.err.println("bound shutdown monitor in local registry"); 91 92 System.err.println("starting remote ShutdownImpl VM..."); 93 (new JavaVM("ShutdownImpl")).start(); 94 95 Shutdown s; 96 synchronized (obj.lock) { 97 System.err.println( 98 "waiting for submission of object to shutdown..."); 99 while ((s = obj.shutdown) == null) { 100 obj.lock.wait(TIMEOUT); 101 } 102 if (s == null) { 103 throw new RuntimeException( 104 "TEST FAILED: timeout waiting for shutdown object " + 105 "to make initial contact"); 106 } 107 System.err.println("shutdown object submitted: " + s); 108 } 109 110 try { 111 s.shutdown(); 112 } catch (RemoteException e) { 113 throw new RuntimeException( 114 "TEST FAILED: shutdown method threw remote exception", e); 115 } 116 117 synchronized (obj.lock) { 118 if (!obj.stillAlive) { 119 throw new RuntimeException("TEST FAILED: " + 120 "shutdown object not detected alive after unexport"); 121 } 122 } 123 124 System.err.println("TEST PASSED: " + 125 "shutdown object detected still alive after unexport"); 126 127 } catch (Exception e) { 128 if (e instanceof RuntimeException) { 129 throw (RuntimeException) e; 130 } else { 131 throw new RuntimeException( 132 "TEST FAILED: unexpected exception", e); 133 } 134 } finally { 135 try { 136 UnicastRemoteObject.unexportObject(obj, true); 137 } catch (RemoteException e) { 138 } 139 } 140 } 141 }