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1   /*
2    * Copyright 2020 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    *   https://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.example.stomp.websocket;
17  
18  import io.netty.channel.ChannelInitializer;
19  import io.netty.channel.socket.SocketChannel;
20  import io.netty.handler.codec.http.HttpObjectAggregator;
21  import io.netty.handler.codec.http.HttpServerCodec;
22  import io.netty.handler.codec.http.websocketx.WebSocketServerProtocolHandler;
23  import io.netty.util.internal.ObjectUtil;
24  
25  public class StompWebSocketChatServerInitializer extends ChannelInitializer<SocketChannel> {
26  
27      private final String chatPath;
28      private final StompWebSocketProtocolCodec stompWebSocketProtocolCodec;
29  
30      public StompWebSocketChatServerInitializer(String chatPath) {
31          this.chatPath = ObjectUtil.checkNotNull(chatPath, "chatPath");
32          stompWebSocketProtocolCodec = new StompWebSocketProtocolCodec();
33      }
34  
35      @Override
36      protected void initChannel(SocketChannel channel) throws Exception {
37          channel.pipeline()
38                 .addLast(new HttpServerCodec())
39                 .addLast(new HttpObjectAggregator(65536))
40                 .addLast(StompWebSocketClientPageHandler.INSTANCE)
41                 .addLast(new WebSocketServerProtocolHandler(chatPath, StompVersion.SUB_PROTOCOLS))
42                 .addLast(stompWebSocketProtocolCodec);
43      }
44  }