1 /*
2 * Copyright 2013 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.channel.group;
17
18 import io.netty.channel.Channel;
19 import io.netty.channel.ChannelException;
20 import io.netty.channel.ChannelFuture;
21
22 import java.util.Collection;
23 import java.util.Collections;
24 import java.util.Iterator;
25 import java.util.Map;
26
27 /**
28 * {@link ChannelException} which holds {@link ChannelFuture}s that failed because of an error.
29 */
30 public class ChannelGroupException extends ChannelException implements Iterable<Map.Entry<Channel, Throwable>> {
31 private static final long serialVersionUID = -4093064295562629453L;
32 private final Collection<Map.Entry<Channel, Throwable>> failed;
33
34 public ChannelGroupException(Collection<Map.Entry<Channel, Throwable>> causes) {
35 if (causes == null) {
36 throw new NullPointerException("causes");
37 }
38 if (causes.isEmpty()) {
39 throw new IllegalArgumentException("causes must be non empty");
40 }
41 failed = Collections.unmodifiableCollection(causes);
42 }
43
44 /**
45 * Returns a {@link Iterator} which contains all the {@link Throwable} that was a cause of the failure and the
46 * related id of the {@link Channel}.
47 */
48 @Override
49 public Iterator<Map.Entry<Channel, Throwable>> iterator() {
50 return failed.iterator();
51 }
52 }