Package gw.fs.watcher

Class DirectoryWatcher


  • public class DirectoryWatcher
    extends Object
    • Constructor Detail

      • DirectoryWatcher

        public DirectoryWatcher()
    • Method Detail

      • stopWatching

        public void stopWatching()
        Close the watch service. Releases resources. After calling, this instance becomes invalid and can't be used any more.
      • watchDirectoryTree

        public void watchDirectoryTree​(Path dir)
        Walk the directories under given path, and register a watcher for every directory.
        Parameters:
        dir - the starting point under which to listen for changes, if it doesn't exist, do nothing.
      • getChangesSinceLastTime

        public Map<Path,​DirectoryWatcher.FileEvent> getChangesSinceLastTime()
        Checks all the watched directories (that are being kept in a map) for changes since the last call to this method.
      • If a file is already marked as CREATE, leave it as CREATE; if it's marked as DELETE, that's totally invalid, so just ignore that. If it's marked as MODIFY, no need to change it. So only put something in the map if it's not already in there.
      • If a create follows a delete, it means the editor deleted and re-created the file, and who knows what the contents are now, so it should be treated as a modification.
      • If the file was created, then deleted, then just ignore it entirely and remove the event.
Returns:
FileEvent enum for each watched Path found, indicating the type of modification that happened.