jellitBarack / Java-DirectoryWatcher

A small library for watching directory changes.

Java-DirectoryWatcher

A small library for watching directory changes. It uses the WatchService API from Oracle.

Simple Example

class Example implements WatchEventCallback {

  public static void main(String[] args){
    DirectoryWatcher watcher = new DirectoryWatcher(Paths.get("C:/"), new Example(), WatchOptions.INCLUDE_SUB_DIRS);
    watcher.startWatching();
  }

  @Override
  public void onChangeDetected(ChangedFile changedFile){
         // what kind of event occurred:
        System.out.println(changedFile.getChangeKind());
        // what file is the event referring to:
        System.out.println(changedFile.getAbsolutePath());
        // when did it happen:
        System.out.println(changedFile.getChangeTime());
        // you could also call the toString method to get all of the information above:
        System.out.println(changedFile.toString());
  }
}

Lambda Example

You can also use a lambda expression to write a neat one liner

new DirectoryWatcher(dirToWatch, changedFile -> System.out.println(changedFile.toString())).startWatching();