Class FileWatcher


  • public class FileWatcher
    extends java.lang.Object
    The FileWatcher *watches* a single file and fires a change notification whenever the file is modified. A couple notes: 1. To keep from processing change events every time the file is modified, which may be too frequent and cause processing issues, we use a simple polling mechanism. 2. Changes in the file are identified by inspecting the File.lastModified() timestamp. 3. The WatchService mechanism is not being used here since we cannot specify a polling rate.
    • Constructor Summary

      Constructors 
      Constructor Description
      FileWatcher​(java.io.File file, FVEventListener eventListener)
      Constructor.
    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      void start()
      Starts polling, or resumes polling if previously stopped.
      void stop()
      Suspends the timer so it will no longer poll.
      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
    • Constructor Detail

      • FileWatcher

        public FileWatcher​(java.io.File file,
                           FVEventListener eventListener)
        Constructor. Creates a new Executor that will inspect the file at regular intervals. Users must call start() to begin polling.
        Parameters:
        file - the file to be watched
    • Method Detail

      • stop

        public void stop()
        Suspends the timer so it will no longer poll. This does not perform a shutdown, so the future may be scheduled again.
      • start

        public void start()
        Starts polling, or resumes polling if previously stopped.