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/* @test
* @bug 4313887
* @summary Sanity test for Sun-specific sensitivity level watch event modifier
* @library ..
* @run main/timeout=240 SensitivityModifier
*/
import java.nio.file.*;
import static java.nio.file.StandardWatchEventKinds.*;
import java.io.OutputStream;
import java.io.IOException;
import java.util.Random;
import java.util.concurrent.TimeUnit;
import com.sun.nio.file.SensitivityWatchEventModifier;
public class SensitivityModifier {
static final Random rand = new Random();
static void register(Path[] dirs, WatchService watcher) throws IOException {
SensitivityWatchEventModifier[] sensitivtives =
SensitivityWatchEventModifier.values();
for (int i=0; i<dirs.length; i++) {
SensitivityWatchEventModifier sensivity =
sensitivtives[ rand.nextInt(sensitivtives.length) ];
Path dir = dirs[i];
dir.register(watcher, new WatchEvent.Kind<?>[]{ ENTRY_MODIFY }, sensivity);
}
}
@SuppressWarnings("unchecked")
static void doTest(Path top) throws Exception {
FileSystem fs = top.getFileSystem();
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...");
WatchKey key = watcher.take();
WatchEvent<?> event = key.pollEvents().iterator().next();
if (event.kind() != ENTRY_MODIFY)
throw new RuntimeException("Unexpected event: " + event);
Path name = ((WatchEvent<Path>)event).context();
if (!name.equals(file.getFileName()))
throw new RuntimeException("Unexpected context: " + name);
System.out.println("Event OK");
// drain events (to avoid interference)
do {
key.pollEvents();
key.reset();
key = watcher.poll(1, TimeUnit.SECONDS);
} while (key != null);
// re-register the directories to force changing their sensitivity
// level
register(dirs, watcher);
}
// done
watcher.close();
}
public static void main(String[] args) throws Exception {
Path dir = TestUtil.createTemporaryDirectory();
try {
doTest(dir);
} finally {
TestUtil.removeAll(dir);
}
}
}