RacyRegister.java revision 5522
3133cf1b294fb4042826d58b24e4a2d0216d0349jeff.schenk/*
dfc4e0fc3052835b2a069aa9d869fa1161c33fe6Peter Major * Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved.
dfc4e0fc3052835b2a069aa9d869fa1161c33fe6Peter Major * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
dfc4e0fc3052835b2a069aa9d869fa1161c33fe6Peter Major *
af8fe070900fcdf6f6aa74ca98cc0c3ee5cee344Pavel Shapovalov * This code is free software; you can redistribute it and/or modify it
dfc4e0fc3052835b2a069aa9d869fa1161c33fe6Peter Major * under the terms of the GNU General Public License version 2 only, as
dfc4e0fc3052835b2a069aa9d869fa1161c33fe6Peter Major * published by the Free Software Foundation.
dfc4e0fc3052835b2a069aa9d869fa1161c33fe6Peter Major *
dfc4e0fc3052835b2a069aa9d869fa1161c33fe6Peter Major * This code is distributed in the hope that it will be useful, but WITHOUT
dfc4e0fc3052835b2a069aa9d869fa1161c33fe6Peter Major * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
dfc4e0fc3052835b2a069aa9d869fa1161c33fe6Peter Major * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
dfc4e0fc3052835b2a069aa9d869fa1161c33fe6Peter Major * version 2 for more details (a copy is included in the LICENSE file that
dfc4e0fc3052835b2a069aa9d869fa1161c33fe6Peter Major * accompanied this code).
dfc4e0fc3052835b2a069aa9d869fa1161c33fe6Peter Major *
dfc4e0fc3052835b2a069aa9d869fa1161c33fe6Peter Major * You should have received a copy of the GNU General Public License version
dfc4e0fc3052835b2a069aa9d869fa1161c33fe6Peter Major * 2 along with this work; if not, write to the Free Software Foundation,
dfc4e0fc3052835b2a069aa9d869fa1161c33fe6Peter Major * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
dfc4e0fc3052835b2a069aa9d869fa1161c33fe6Peter Major *
dfc4e0fc3052835b2a069aa9d869fa1161c33fe6Peter Major * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
dfc4e0fc3052835b2a069aa9d869fa1161c33fe6Peter Major * or visit www.oracle.com if you need additional information or have any
dfc4e0fc3052835b2a069aa9d869fa1161c33fe6Peter Major * questions.
dfc4e0fc3052835b2a069aa9d869fa1161c33fe6Peter Major */
dfc4e0fc3052835b2a069aa9d869fa1161c33fe6Peter Major
dfc4e0fc3052835b2a069aa9d869fa1161c33fe6Peter Major/* @test
dfc4e0fc3052835b2a069aa9d869fa1161c33fe6Peter Major * @bug 7132889
1f48f8236de7de97be1c6b9d06bef50b379c8801jenkins * @summary Test that register does not return a valid SelectionKey when
3133cf1b294fb4042826d58b24e4a2d0216d0349jeff.schenk * invoked at around the time that the channel is closed
3133cf1b294fb4042826d58b24e4a2d0216d0349jeff.schenk */
2feee3bd4482cbe7e4a8cf1a228bf17723b13934jeff.schenk
2feee3bd4482cbe7e4a8cf1a228bf17723b13934jeff.schenkimport java.nio.channels.*;
2feee3bd4482cbe7e4a8cf1a228bf17723b13934jeff.schenkimport java.util.concurrent.*;
2feee3bd4482cbe7e4a8cf1a228bf17723b13934jeff.schenkimport java.util.Random;
2feee3bd4482cbe7e4a8cf1a228bf17723b13934jeff.schenkimport java.io.IOException;
2feee3bd4482cbe7e4a8cf1a228bf17723b13934jeff.schenk
2feee3bd4482cbe7e4a8cf1a228bf17723b13934jeff.schenkpublic class RacyRegister {
2feee3bd4482cbe7e4a8cf1a228bf17723b13934jeff.schenk
2feee3bd4482cbe7e4a8cf1a228bf17723b13934jeff.schenk public static void main(String[] args) throws Exception {
2feee3bd4482cbe7e4a8cf1a228bf17723b13934jeff.schenk ExecutorService pool = Executors.newFixedThreadPool(1);
2feee3bd4482cbe7e4a8cf1a228bf17723b13934jeff.schenk try (Selector sel = Selector.open()) {
2feee3bd4482cbe7e4a8cf1a228bf17723b13934jeff.schenk int count = 100;
2feee3bd4482cbe7e4a8cf1a228bf17723b13934jeff.schenk while (count-- > 0) {
2feee3bd4482cbe7e4a8cf1a228bf17723b13934jeff.schenk final SocketChannel sc = SocketChannel.open();
2feee3bd4482cbe7e4a8cf1a228bf17723b13934jeff.schenk sc.configureBlocking(false);
2feee3bd4482cbe7e4a8cf1a228bf17723b13934jeff.schenk
2feee3bd4482cbe7e4a8cf1a228bf17723b13934jeff.schenk // close channel asynchronously
2feee3bd4482cbe7e4a8cf1a228bf17723b13934jeff.schenk Future<Void> result = pool.submit(new Callable<Void>() {
2feee3bd4482cbe7e4a8cf1a228bf17723b13934jeff.schenk public Void call() throws IOException {
2feee3bd4482cbe7e4a8cf1a228bf17723b13934jeff.schenk sc.close();
3133cf1b294fb4042826d58b24e4a2d0216d0349jeff.schenk return null;
3133cf1b294fb4042826d58b24e4a2d0216d0349jeff.schenk }
3133cf1b294fb4042826d58b24e4a2d0216d0349jeff.schenk });
3133cf1b294fb4042826d58b24e4a2d0216d0349jeff.schenk
f88732ef3841903377488b4953a5a50ebf506bc9James Phillpotts // attempt to register channel with Selector
3133cf1b294fb4042826d58b24e4a2d0216d0349jeff.schenk SelectionKey key = null;
3133cf1b294fb4042826d58b24e4a2d0216d0349jeff.schenk try {
3133cf1b294fb4042826d58b24e4a2d0216d0349jeff.schenk key = sc.register(sel, SelectionKey.OP_READ);
247203cf5bb5bc7e81871318633899d2c44416b0Mark Craig } catch (ClosedChannelException ignore) {
a622f6b14edb724c3cdbc8b5836a109d4ac80086Peter Major }
3133cf1b294fb4042826d58b24e4a2d0216d0349jeff.schenk
1c39f25b4e11ae0397f825f3d031bd01983b98f0Bruno Lavit // ensure close is done
3133cf1b294fb4042826d58b24e4a2d0216d0349jeff.schenk result.get();
3133cf1b294fb4042826d58b24e4a2d0216d0349jeff.schenk
3133cf1b294fb4042826d58b24e4a2d0216d0349jeff.schenk // if we have a key then it should be invalid
3133cf1b294fb4042826d58b24e4a2d0216d0349jeff.schenk if (key != null && key.isValid())
3133cf1b294fb4042826d58b24e4a2d0216d0349jeff.schenk throw new RuntimeException("Key is valid");
3133cf1b294fb4042826d58b24e4a2d0216d0349jeff.schenk }
3133cf1b294fb4042826d58b24e4a2d0216d0349jeff.schenk } finally {
3133cf1b294fb4042826d58b24e4a2d0216d0349jeff.schenk pool.shutdown();
3133cf1b294fb4042826d58b24e4a2d0216d0349jeff.schenk }
3133cf1b294fb4042826d58b24e4a2d0216d0349jeff.schenk }
3133cf1b294fb4042826d58b24e4a2d0216d0349jeff.schenk}
3133cf1b294fb4042826d58b24e4a2d0216d0349jeff.schenk