TelnetClientInitializer xref
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.netty5.example.telnet;
17
18 import io.netty5.channel.ChannelInitializer;
19 import io.netty5.channel.ChannelPipeline;
20 import io.netty5.channel.socket.SocketChannel;
21 import io.netty5.handler.codec.DelimiterBasedFrameDecoder;
22 import io.netty5.handler.codec.Delimiters;
23 import io.netty5.handler.codec.string.StringDecoder;
24 import io.netty5.handler.codec.string.StringEncoder;
25 import io.netty5.handler.ssl.SslContext;
26
27 /**
28 * Creates a newly configured {@link ChannelPipeline} for a new channel.
29 */
30 public class TelnetClientInitializer extends ChannelInitializer<SocketChannel> {
31
32 private static final StringDecoder DECODER = new StringDecoder();
33 private static final StringEncoder ENCODER = new StringEncoder();
34
35 private static final TelnetClientHandler CLIENT_HANDLER = new TelnetClientHandler();
36
37 private final SslContext sslCtx;
38
39 public TelnetClientInitializer(SslContext sslCtx) {
40 this.sslCtx = sslCtx;
41 }
42
43 @Override
44 public void initChannel(SocketChannel ch) {
45 ChannelPipeline pipeline = ch.pipeline();
46
47 if (sslCtx != null) {
48 pipeline.addLast(sslCtx.newHandler(ch.bufferAllocator(), TelnetClient.HOST, TelnetClient.PORT));
49 }
50
51 // Add the text line codec combination first,
52 pipeline.addLast(new DelimiterBasedFrameDecoder(8192, Delimiters.lineDelimiter()));
53 pipeline.addLast(DECODER);
54 pipeline.addLast(ENCODER);
55
56 // and then business logic.
57 pipeline.addLast(CLIENT_HANDLER);
58 }
59 }