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 org.jboss.netty.example.qotm;
17
18 import org.jboss.netty.bootstrap.ConnectionlessBootstrap;
19 import org.jboss.netty.channel.ChannelPipeline;
20 import org.jboss.netty.channel.ChannelPipelineFactory;
21 import org.jboss.netty.channel.Channels;
22 import org.jboss.netty.channel.FixedReceiveBufferSizePredictorFactory;
23 import org.jboss.netty.channel.socket.nio.NioDatagramChannelFactory;
24 import org.jboss.netty.handler.codec.string.StringDecoder;
25 import org.jboss.netty.handler.codec.string.StringEncoder;
26 import org.jboss.netty.util.CharsetUtil;
27
28 import java.net.InetSocketAddress;
29
30 /**
31 * A UDP server that responds to the QOTM (quote of the moment) request to a {@link QuoteOfTheMomentClient}.
32 *
33 * Inspired by <a href="http://docs.oracle.com/javase/tutorial/networking/datagrams/clientServer.html">the official
34 * Java tutorial</a>.
35 */
36 public final class QuoteOfTheMomentServer {
37
38 private static final int PORT = Integer.parseInt(System.getProperty("port", "7686"));
39
40 public static void main(String[] args) throws Exception {
41 ConnectionlessBootstrap b = new ConnectionlessBootstrap(new NioDatagramChannelFactory());
42
43 // Configure the pipeline factory.
44 b.setPipelineFactory(new ChannelPipelineFactory() {
45 public ChannelPipeline getPipeline() {
46 return Channels.pipeline(
47 new StringEncoder(CharsetUtil.ISO_8859_1),
48 new StringDecoder(CharsetUtil.ISO_8859_1),
49 new QuoteOfTheMomentServerHandler());
50 }
51 });
52
53 // Enable broadcast
54 b.setOption("broadcast", "false");
55
56 // Allow packets as large as up to 1024 bytes (default is 768).
57 // You could increase or decrease this value to avoid truncated packets
58 // or to improve memory footprint respectively.
59 //
60 // Please also note that a large UDP packet might be truncated or
61 // dropped by your router no matter how you configured this option.
62 // In UDP, a packet is truncated or dropped if it is larger than a
63 // certain size, depending on router configuration. IPv4 routers
64 // truncate and IPv6 routers drop a large packet. That's why it is
65 // safe to send small packets in UDP.
66 b.setOption(
67 "receiveBufferSizePredictorFactory",
68 new FixedReceiveBufferSizePredictorFactory(1024));
69
70 // Bind to the port and start the service.
71 b.bind(new InetSocketAddress(PORT));
72 }
73 }