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 * 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.factorial;
17
18 import io.netty.channel.ChannelInitializer;
19 import io.netty.channel.ChannelPipeline;
20 import io.netty.channel.socket.SocketChannel;
21 import io.netty.handler.codec.compression.ZlibCodecFactory;
22 import io.netty.handler.codec.compression.ZlibWrapper;
23 import io.netty.handler.ssl.SslContext;
24
25 /**
26 * Creates a newly configured {@link ChannelPipeline} for a server-side channel.
27 */
28 public class FactorialServerInitializer extends ChannelInitializer<SocketChannel> {
29
30 private final SslContext sslCtx;
31
32 public FactorialServerInitializer(SslContext sslCtx) {
33 this.sslCtx = sslCtx;
34 }
35
36 @Override
37 public void initChannel(SocketChannel ch) {
38 ChannelPipeline pipeline = ch.pipeline();
39
40 if (sslCtx != null) {
41 pipeline.addLast(sslCtx.newHandler(ch.alloc()));
42 }
43
44 // Enable stream compression (you can remove these two if unnecessary)
45 pipeline.addLast(ZlibCodecFactory.newZlibEncoder(ZlibWrapper.GZIP));
46 pipeline.addLast(ZlibCodecFactory.newZlibDecoder(ZlibWrapper.GZIP));
47
48 // Add the number codec first,
49 pipeline.addLast(new BigIntegerDecoder());
50 pipeline.addLast(new NumberEncoder());
51
52 // and then business logic.
53 // Please note we create a handler for every new channel
54 // because it has stateful properties.
55 pipeline.addLast(new FactorialServerHandler());
56 }
57 }