I have the same issue trying to watch a mounted windows share via CIFS. It seems not possible to get filesystem events for CIFS mounts. The linux implementation of the Java 7 NIO FileWatcher uses inotify. Inotify is a linux kernel subsystem to notice filesystem changes which works perfect for local directories, but apparently not … Read more
WatcherServices reports events twice because the underlying file is updated twice. Once for the content and once for the file modified time. These events happen within a short time span. To solve this, sleep between the poll() or take() calls and the key.pollEvents() call. For example: @Override @SuppressWarnings( “SleepWhileInLoop” ) public void run() { setListening( … Read more
I have much better response times if I change folder.register(watcher, StandardWatchEventKinds.ENTRY_MODIFY); to folder.register(watcher, new WatchEvent.Kind[]{StandardWatchEventKinds.ENTRY_MODIFY}, SensitivityWatchEventModifier.HIGH);
Just filter the events for the file you want in the directory: final Path path = FileSystems.getDefault().getPath(System.getProperty(“user.home”), “Desktop”); System.out.println(path); try (final WatchService watchService = FileSystems.getDefault().newWatchService()) { final WatchKey watchKey = path.register(watchService, StandardWatchEventKinds.ENTRY_MODIFY); while (true) { final WatchKey wk = watchService.take(); for (WatchEvent<?> event : wk.pollEvents()) { //we only register “ENTRY_MODIFY” so the context is always … Read more