| /* |
| * Copyright 2011 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 com.google.gwt.core.client; |
| |
| /** |
| * A callback for any asynchronous call that can result in success or failure. |
| * |
| * @param <T> The type returned on success |
| * @param <F> The type returned on failure |
| */ |
| public interface Callback<T, F> { |
| |
| /** |
| * Called when an asynchronous call fails to complete normally. |
| * |
| * @param reason failure encountered |
| */ |
| void onFailure(F reason); |
| |
| /** |
| * Called when an asynchronous call completes successfully. |
| * |
| * @param result the value returned |
| */ |
| void onSuccess(T result); |
| } |