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 org.jboss.netty.channel;
17
18 /**
19 * The {@link CompleteChannelFuture} which is failed already. It is
20 * recommended to use {@link Channels#failedFuture(Channel, Throwable)}
21 * instead of calling the constructor of this future.
22 */
23 public class FailedChannelFuture extends CompleteChannelFuture {
24
25 private final Throwable cause;
26
27 /**
28 * Creates a new instance.
29 *
30 * @param channel the {@link Channel} associated with this future
31 * @param cause the cause of failure
32 */
33 public FailedChannelFuture(Channel channel, Throwable cause) {
34 super(channel);
35 if (cause == null) {
36 throw new NullPointerException("cause");
37 }
38 this.cause = cause;
39 }
40
41 public Throwable getCause() {
42 return cause;
43 }
44
45 public boolean isSuccess() {
46 return false;
47 }
48
49 public ChannelFuture rethrowIfFailed() throws Exception {
50 if (cause instanceof Exception) {
51 throw (Exception) cause;
52 }
53
54 if (cause instanceof Error) {
55 throw (Error) cause;
56 }
57
58 throw new RuntimeException(cause);
59 }
60
61 public ChannelFuture sync() throws InterruptedException {
62 rethrow();
63 return this;
64 }
65
66 public ChannelFuture syncUninterruptibly() {
67 rethrow();
68 return this;
69 }
70
71 private void rethrow() {
72 if (cause instanceof RuntimeException) {
73 throw (RuntimeException) cause;
74 }
75
76 if (cause instanceof Error) {
77 throw (Error) cause;
78 }
79
80 throw new ChannelException(cause);
81 }
82 }