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