com.google.appengine.tools.admin

## Interface UpdateListener

-     public interface UpdateListener

  A listener which receives events during a long running operation that involves interaction with the server. Implement this interface to be notified of progress during application update.

- - ### Method Summary

    Methods
    Modifier and Type | Method and Description
    --- | ---
    `void` | `onFailure(UpdateFailureEvent event)` Called if the operation has failed.
    `void` | `onProgress(UpdateProgressEvent event)` Called each time some progress is made during the operation.
    `void` | `onSuccess(UpdateSuccessEvent event)` Called if the operation has completed successfully.

- - ### Method Detail

    - #### onProgress

          void onProgress(UpdateProgressEvent event)

      Called each time some progress is made during the operation.
      Parameters:
        `event` - a not `null` event.

    - #### onSuccess

          void onSuccess(UpdateSuccessEvent event)

      Called if the operation has completed successfully.
      Parameters:
        `event` - a not `null` event.

    - #### onFailure

          void onFailure(UpdateFailureEvent event)

      Called if the operation has failed.
      Parameters:
        `event` - a not `null` event.