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1   /*
2    * Copyright 2009 Red Hat, Inc.
3    *
4    * Red Hat licenses this file to you under the Apache License, version 2.0
5    * (the "License"); you may not use this file except in compliance with the
6    * 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 java.net.SocketAddress;
19  
20  import org.jboss.netty.util.internal.StringUtil;
21  
22  /**
23   * The default downstream {@link MessageEvent} implementation.
24   *
25   * @author <a href="http://www.jboss.org/netty/">The Netty Project</a>
26   * @author <a href="http://gleamynode.net/">Trustin Lee</a>
27   *
28   * @version $Rev: 2080 $, $Date: 2010-01-26 18:04:19 +0900 (Tue, 26 Jan 2010) $
29   *
30   */
31  public class DownstreamMessageEvent implements MessageEvent {
32  
33      private final Channel channel;
34      private final ChannelFuture future;
35      private final Object message;
36      private final SocketAddress remoteAddress;
37  
38      /**
39       * Creates a new instance.
40       */
41      public DownstreamMessageEvent(
42              Channel channel, ChannelFuture future,
43              Object message, SocketAddress remoteAddress) {
44  
45          if (channel == null) {
46              throw new NullPointerException("channel");
47          }
48          if (future == null) {
49              throw new NullPointerException("future");
50          }
51          if (message == null) {
52              throw new NullPointerException("message");
53          }
54          this.channel = channel;
55          this.future = future;
56          this.message = message;
57          if (remoteAddress != null) {
58              this.remoteAddress = remoteAddress;
59          } else {
60              this.remoteAddress = channel.getRemoteAddress();
61          }
62      }
63  
64      public Channel getChannel() {
65          return channel;
66      }
67  
68      public ChannelFuture getFuture() {
69          return future;
70      }
71  
72      public Object getMessage() {
73          return message;
74      }
75  
76      public SocketAddress getRemoteAddress() {
77          return remoteAddress;
78      }
79  
80      @Override
81      public String toString() {
82          if (getRemoteAddress() == getChannel().getRemoteAddress()) {
83              return getChannel().toString() + " WRITE: " +
84                     StringUtil.stripControlCharacters(getMessage());
85          } else {
86              return getChannel().toString() + " WRITE: " +
87                     StringUtil.stripControlCharacters(getMessage()) + " to " +
88                     getRemoteAddress();
89          }
90      }
91  }