136 lines
5.0 KiB
Java
136 lines
5.0 KiB
Java
/*
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* Copyright (c) 2015, 2016, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/* @test
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* @bug 8145981
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* @summary LinuxWatchService sometimes reports inotify events against wrong directory
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* @run main UpdateInterference
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*/
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import java.io.IOException;
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import java.nio.file.*;
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import java.util.List;
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import java.util.concurrent.TimeUnit;
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import static java.nio.file.StandardWatchEventKinds.*;
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public class UpdateInterference {
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private static volatile boolean stop;
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public static void main(String[] args) throws IOException, InterruptedException {
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final Path root = Files.createTempDirectory("test");
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final Path foo = root.resolve("foo");
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final Path bar = root.resolve("bar");
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final Path baz = root.resolve("baz");
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Files.createDirectory(foo);
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Files.createDirectory(bar);
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Files.createDirectory(baz);
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try (final WatchService watcher = root.getFileSystem().newWatchService()) {
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final WatchKey fooKey = foo.register(watcher, ENTRY_CREATE);
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final WatchKey barKey = bar.register(watcher, ENTRY_CREATE);
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Thread t1 = null;
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Thread t2 = null;
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try {
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t1 = new Thread() {
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@Override
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public void run() {
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while (!stop) {
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try {
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final Path temp = Files.createTempFile(foo, "temp", ".tmp");
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Files.delete(temp);
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Thread.sleep(10);
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} catch (IOException | InterruptedException e) {
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throw new RuntimeException(e);
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}
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}
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}
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};
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t2 = new Thread() {
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@Override
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public void run() {
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WatchKey bazKeys[] = new WatchKey[32];
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while (!stop) {
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try {
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for( int i = 0; i < bazKeys.length; i++) {
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bazKeys[i] = baz.register(watcher, ENTRY_CREATE);
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}
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for( int i = 0; i < bazKeys.length; i++) {
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bazKeys[i].cancel();
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}
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Thread.sleep(1);
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} catch (IOException | InterruptedException e) {
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throw new RuntimeException(e);
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}
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}
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}
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};
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t1.start();
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t2.start();
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long time = System.currentTimeMillis();
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while ((System.currentTimeMillis() - time) < 15000) {
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final WatchKey key = watcher.poll(60, TimeUnit.SECONDS);
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if (key == null) continue;
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if (key != fooKey) {
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List<WatchEvent<?>> pollEvents = key.pollEvents();
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for (WatchEvent<?> watchEvent : pollEvents) {
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System.out.println(watchEvent.count() + " " +
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watchEvent.kind() + " " +
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watchEvent.context());
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}
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throw new RuntimeException("Event received for unexpected key");
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}
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key.reset();
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}
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} finally {
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// the threads should stop before WatchService is closed
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// to avoid ClosedWatchServiceException
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stop = true;
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// wait for threads to finish
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if (t1 != null) {
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t1.join();
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}
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if (t2 != null) {
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t2.join();
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}
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}
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} finally {
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// clean up
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Files.delete(foo);
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Files.delete(bar);
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Files.delete(baz);
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Files.delete(root);
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}
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}
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}
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