| /* |
| * Copyright (C) 2011 The Guava Authors |
| * |
| * 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.common.util.concurrent; |
| |
| import com.google.common.annotations.GwtCompatible; |
| import java.util.concurrent.ExecutionException; |
| import java.util.concurrent.Future; |
| import org.checkerframework.checker.nullness.qual.Nullable; |
| |
| /** |
| * A callback for accepting the results of a {@link java.util.concurrent.Future} computation |
| * asynchronously. |
| * |
| * <p>To attach to a {@link ListenableFuture} use {@link Futures#addCallback}. |
| * |
| * @author Anthony Zana |
| * @since 10.0 |
| */ |
| @GwtCompatible |
| public interface FutureCallback<V> { |
| /** Invoked with the result of the {@code Future} computation when it is successful. */ |
| void onSuccess(@Nullable V result); |
| |
| /** |
| * Invoked when a {@code Future} computation fails or is canceled. |
| * |
| * <p>If the future's {@link Future#get() get} method throws an {@link ExecutionException}, then |
| * the cause is passed to this method. Any other thrown object is passed unaltered. |
| */ |
| void onFailure(Throwable t); |
| } |