/**
* Copyright 2010 Google Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
package org.waveprotocol.box.webclient.common.communication.callback;
/**
* A callback for a task which may either succeed or fail.
*
* Exactly one of {@link #onSuccess(Object)} or {@link #onFailure(Object)}
* must be invoked exactly once by receivers of a callback.
*
* @param <R> type of a successful response
* @param <F> type of a failure response
* @author anorth@google.com (Alex North)
*/
public interface SimpleCallback<R, F> {
/**
* Called when the task succeeds.
*
* @param response successful response object for this callback
*/
public void onSuccess(R response);
/**
* Called when the task fails.
*
* @param reason failure reason for this callback
*/
public void onFailure(F reason);
}