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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  import static org.jboss.netty.channel.Channels.*;
19  
20  /**
21   * The default {@link WriteCompletionEvent} implementation.
22   */
23  public class DefaultWriteCompletionEvent implements WriteCompletionEvent {
24  
25      private final Channel channel;
26      private final long writtenAmount;
27  
28      /**
29       * Creates a new instance.
30       */
31      public DefaultWriteCompletionEvent(Channel channel, long writtenAmount) {
32          if (channel == null) {
33              throw new NullPointerException("channel");
34          }
35          if (writtenAmount <= 0) {
36              throw new IllegalArgumentException(
37                      "writtenAmount must be a positive integer: " + writtenAmount);
38          }
39  
40          this.channel = channel;
41          this.writtenAmount = writtenAmount;
42      }
43  
44      public Channel getChannel() {
45          return channel;
46      }
47  
48      public ChannelFuture getFuture() {
49          return succeededFuture(getChannel());
50      }
51  
52      public long getWrittenAmount() {
53          return writtenAmount;
54      }
55  
56      @Override
57      public String toString() {
58          String channelString = getChannel().toString();
59          StringBuilder buf = new StringBuilder(channelString.length() + 32);
60          buf.append(channelString);
61          buf.append(" WRITTEN_AMOUNT: ");
62          buf.append(getWrittenAmount());
63          return buf.toString();
64      }
65  }