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/*
* Copyright (c) 2008, 2021, 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 4313887
* @summary Sanity test for JDK-specific sensitivity level watch event modifier
* @modules jdk.unsupported
* @library .. /test/lib
* @build jdk.test.lib.Platform
* @build jdk.test.lib.RandomFactory
* @run main/timeout=240 SensitivityModifier
* @key randomness
*/
import java.nio.file.Files;
import java.nio.file.FileSystem;
import java.nio.file.Path;
import java.nio.file.WatchEvent;
import java.nio.file.WatchKey;
import java.nio.file.WatchService;
import static java.nio.file.StandardWatchEventKinds.*;
import java.io.OutputStream;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
import java.util.Random;
import java.util.concurrent.TimeUnit;
import com.sun.nio.file.SensitivityWatchEventModifier;
import jdk.test.lib.Platform;
import jdk.test.lib.RandomFactory;
public class SensitivityModifier {
// on macOS and other platforms, watch services might be based on polling
// requiring a longer timeout to detect events before returning
static final long POLL_TIMEOUT_SECONDS =
Platform.isLinux() || Platform.isWindows() ? 1 : 2;
static final Random RAND = RandomFactory.getRandom();
static final Map<Path,Integer> pathToTime = new HashMap<>();
static void register(Path[] dirs, WatchService watcher) throws IOException {
pathToTime.clear();
SensitivityWatchEventModifier[] sensitivities =
SensitivityWatchEventModifier.values();
for (int i=0; i<dirs.length; i++) {
SensitivityWatchEventModifier sensitivity =
sensitivities[RAND.nextInt(sensitivities.length)];
Path dir = dirs[i];
dir.register(watcher, new WatchEvent.Kind<?>[]{ ENTRY_MODIFY },
sensitivity);
pathToTime.put(dir, sensitivity.sensitivityValueInSeconds());
}
}
@SuppressWarnings("unchecked")
static void doTest(Path top) throws Exception {
FileSystem fs = top.getFileSystem();
try (WatchService watcher = fs.newWatchService()) {
// create directories and files
int nDirs = 5 + RAND.nextInt(20);
int nFiles = 50 + RAND.nextInt(50);
Path[] dirs = new Path[nDirs];
Path[] files = new Path[nFiles];
for (int i=0; i<nDirs; i++) {
dirs[i] = Files.createDirectory(top.resolve("dir" + i));
}
for (int i=0; i<nFiles; i++) {
Path dir = dirs[RAND.nextInt(nDirs)];
files[i] = Files.createFile(dir.resolve("file" + i));
}
// register the directories (random sensitivity)
register(dirs, watcher);
// sleep a bit here to ensure that modification to the first file
// can be detected by polling implementations (ie: last modified time
// may not change otherwise).
try { Thread.sleep(1000); } catch (InterruptedException e) { }
// modify files and check that events are received
for (int i=0; i<10; i++) {
Path file = files[RAND.nextInt(nFiles)];
System.out.println("Modify: " + file);
try (OutputStream out = Files.newOutputStream(file)) {
out.write(new byte[100]);
}
System.out.println("Waiting for event(s)...");
boolean eventReceived = false;
WatchKey key = watcher.take();
do {
for (WatchEvent<?> event: key.pollEvents()) {
if (event.kind() != ENTRY_MODIFY)
throw new RuntimeException("Unexpected event: " + event);
Path name = ((WatchEvent<Path>)event).context();
if (name.equals(file.getFileName())) {
eventReceived = true;
break;
}
}
key.reset();
key = watcher.poll(POLL_TIMEOUT_SECONDS, TimeUnit.SECONDS);
} while (key != null);
// we should have received at least one ENTRY_MODIFY event
if (eventReceived) {
System.out.println("Event OK");
} else {
Path parent = file.getParent();
String msg = String.format("No ENTRY_MODIFY event received for %s (dir: %s, sensitivity: %d)",
file, parent, pathToTime.get(parent));
throw new RuntimeException(msg);
}
// re-register the directories to force changing their sensitivity
// level
register(dirs, watcher);
}
}
}
public static void main(String[] args) throws Exception {
Path dir = TestUtil.createTemporaryDirectory();
try {
doTest(dir);
} finally {
TestUtil.removeAll(dir);
}
}
}
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