1 /*
2 * Copyright 2012 The Netty Project
3 *
4 * The Netty Project licenses this file to you under the Apache License,
5 * version 2.0 (the "License"); you may not use this file except in compliance
6 * with the License. You may obtain a copy of the License at:
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
12 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
13 * License for the specific language governing permissions and limitations
14 * under the License.
15 */
16 package io.netty.util.concurrent;
17
18 import io.netty.util.internal.PlatformDependent;
19
20 /**
21 * The {@link CompleteFuture} which is failed already. It is
22 * recommended to use {@link EventExecutor#newFailedFuture(Throwable)}
23 * instead of calling the constructor of this future.
24 */
25 public final class FailedFuture<V> extends CompleteFuture<V> {
26
27 private final Throwable cause;
28
29 /**
30 * Creates a new instance.
31 *
32 * @param executor the {@link EventExecutor} associated with this future
33 * @param cause the cause of failure
34 */
35 public FailedFuture(EventExecutor executor, Throwable cause) {
36 super(executor);
37 if (cause == null) {
38 throw new NullPointerException("cause");
39 }
40 this.cause = cause;
41 }
42
43 @Override
44 public Throwable cause() {
45 return cause;
46 }
47
48 @Override
49 public boolean isSuccess() {
50 return false;
51 }
52
53 @Override
54 public Future<V> sync() {
55 PlatformDependent.throwException(cause);
56 return this;
57 }
58
59 @Override
60 public Future<V> syncUninterruptibly() {
61 PlatformDependent.throwException(cause);
62 return this;
63 }
64
65 @Override
66 public V getNow() {
67 return null;
68 }
69 }