Examples with WatchKey java.nio.file.WatchKey used on opensource projects

Example 71 with WatchKey

use of java.nio.file.WatchKey in project jdk8u_jdk by JetBrains.

the class LotsOfCancels method poll.

/**
     * Polls the given WatchService in a tight loop. This keeps the event
     * queue drained, it also hogs a CPU core which seems necessary to
     * tickle the original bug.
     */
static void poll(WatchService watcher) {
    try {
        for (; ; ) {
            WatchKey key = watcher.take();
            if (key != null) {
                key.pollEvents();
                key.reset();
            }
        }
    } catch (ClosedWatchServiceException expected) {
    // nothing to do
    } catch (Exception e) {
        e.printStackTrace();
        failed = true;
    }
}

Example 72 with WatchKey

use of java.nio.file.WatchKey in project jdk8u_jdk by JetBrains.

the class LotsOfCancels method handle.

/**
     * Stress the given WatchService, specifically the cancel method, in
     * the given directory. Closes the WatchService when done.
     */
static void handle(Path dir, WatchService watcher) {
    try {
        try {
            Path file = dir.resolve("anyfile");
            for (int i = 0; i < 2000; i++) {
                WatchKey key = dir.register(watcher, ENTRY_CREATE, ENTRY_DELETE);
                Files.createFile(file);
                Files.delete(file);
                key.cancel();
            }
        } finally {
            watcher.close();
        }
    } catch (Exception e) {
        e.printStackTrace();
        failed = true;
    }
}

Example 73 with WatchKey

use of java.nio.file.WatchKey in project karaf by apache.

the class AutoEncryptionSupport method run.

@Override
public void run() {
    WatchService watchService = null;
    try {
        watchService = FileSystems.getDefault().newWatchService();
        Path dir = Paths.get(System.getProperty("karaf.etc"));
        dir.register(watchService, ENTRY_MODIFY);
        Path file = dir.resolve("users.properties");
        encryptedPassword(new Properties(file.toFile()));
        while (running) {
            try {
                WatchKey key = watchService.poll(1, TimeUnit.SECONDS);
                if (key == null) {
                    continue;
                }
                for (WatchEvent<?> event : key.pollEvents()) {
                    @SuppressWarnings("unchecked") WatchEvent<Path> ev = (WatchEvent<Path>) event;
                    // Context for directory entry event is the file name of entry
                    Path name = dir.resolve(ev.context());
                    if (file.equals(name)) {
                        encryptedPassword(new Properties(file.toFile()));
                    }
                }
                key.reset();
            } catch (IOException e) {
                LOGGER.warn(e.getMessage(), e);
            } catch (InterruptedException e) {
            // Ignore as this happens on shutdown
            }
        }
    } catch (IOException e) {
        LOGGER.warn(e.getMessage(), e);
    } finally {
        StreamUtils.close(watchService);
    }
}

Example 74 with WatchKey

use of java.nio.file.WatchKey in project asterixdb by apache.

the class FileSystemWatcher method poll.

// poll is not blocking
public synchronized File poll() throws IOException {
    if (it.hasNext()) {
        return it.next();
    }
    if (done || !isFeed) {
        return null;
    }
    files.clear();
    it = files.iterator();
    if (keys.isEmpty()) {
        close();
        return null;
    }
    // Read new Events (Polling first to add all available files)
    WatchKey key;
    key = watcher.poll();
    while (key != null) {
        handleEvents(key);
        if (endOfEvents(key)) {
            close();
            return null;
        }
        key = watcher.poll();
    }
    return null;
}

Example 75 with WatchKey

use of java.nio.file.WatchKey in project JMRI by JMRI.

the class WebAppManager method lifeCycleStarted.

private void lifeCycleStarted(LifeCycle lc, Profile profile) {
    // register watcher to watch web/app directories everywhere
    if (this.watcher.get(profile) != null) {
        FileUtil.findFiles("web", ".").stream().filter((file) -> (file.isDirectory())).forEachOrdered((file) -> {
            try {
                Path path = file.toPath();
                WebAppManager.this.watchPaths.put(path.register(this.watcher.get(profile), StandardWatchEventKinds.ENTRY_CREATE, StandardWatchEventKinds.ENTRY_DELETE, StandardWatchEventKinds.ENTRY_MODIFY), path);
            } catch (IOException ex) {
                log.error("Unable to watch {} for changes.", file);
            }
            (new Thread() {

                @Override
                public void run() {
                    while (WebAppManager.this.watcher.get(profile) != null) {
                        WatchKey key;
                        try {
                            key = WebAppManager.this.watcher.get(profile).take();
                        } catch (InterruptedException ex) {
                            return;
                        }
                        key.pollEvents().stream().filter((event) -> (event.kind() != OVERFLOW)).forEachOrdered((event) -> {
                            WebAppManager.this.savePreferences(profile);
                        });
                        if (!key.reset()) {
                            WebAppManager.this.watcher.remove(profile);
                        }
                    }
                }
            }).start();
        });
    }
}