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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 io.netty.channel.udt.nio;
17  
18  import com.barchart.udt.TypeUDT;
19  import com.barchart.udt.nio.SocketChannelUDT;
20  import io.netty.channel.ChannelMetadata;
21  
22  import java.util.List;
23  
24  /**
25   * Message Channel Acceptor for UDT Datagrams.
26   */
27  public class NioUdtMessageAcceptorChannel extends NioUdtAcceptorChannel {
28  
29      private static final ChannelMetadata METADATA = new ChannelMetadata(false);
30  
31      public NioUdtMessageAcceptorChannel() {
32          super(TypeUDT.DATAGRAM);
33      }
34  
35      @Override
36      protected int doReadMessages(List<Object> buf) throws Exception {
37          final SocketChannelUDT channelUDT = javaChannel().accept();
38          if (channelUDT == null) {
39              return 0;
40          } else {
41              buf.add(new NioUdtMessageConnectorChannel(this, channelUDT));
42              return 1;
43          }
44      }
45  
46      @Override
47      public ChannelMetadata metadata() {
48          return METADATA;
49      }
50  
51  }