!7

module RecursiveFileWatchServiceSpike > DynPrintLog {
  switchable File dir;
  switchable bool verbose;
  
  transient bool started;
  
  start {
    if (dir == null) dir = javaxDataDir();
    thread "Starting" {
      print("Starting watch service on " + dir);
      WatchService watchService = jdk_watchService_start();
      jdk_watchService_registerRecursivePath(dir, voidfunc(File f) enter {
        if (verbose) print("File changed: " + f);
        vmBus_send('fileChanged, f);
      });
      print("Listening to changes in " + dir);
      started = true;
    }
  }
}

Began life as a copy of #1019346