java/src/main/com/google/appengine/tools/admin/UpdateListener.java

   1 // Copyright 2008 Google Inc. All Rights Reserved.
   2
   3 package com.google.appengine.tools.admin;
   4
   5 /**
   6  * A listener which receives events during a long running operation that
   7  * involves interaction with the server. Implement
   8  * this interface to be notified of progress during application update.
   9  */
  10 public interface UpdateListener {
  11
  12   /**
  13    * Called each time some progress is made during the operation.
  14    *
  15    * @param event a not {@code null} event.
  16    */
  17   void onProgress(UpdateProgressEvent event);
  18
  19   /**
  20    * Called if the operation has completed successfully.
  21    *
  22    * @param event a not {@code null} event.
  23    */
  24   void onSuccess(UpdateSuccessEvent event);
  25
  26   /**
  27    * Called if the operation has failed.
  28    *
  29    * @param event a not {@code null} event.
  30    */
  31   void onFailure(UpdateFailureEvent event);
  32 }