1 /*
2 * Copyright 2009 Red Hat, Inc.
3 *
4 * Red Hat licenses this file to you under the Apache License, version 2.0
5 * (the "License"); you may not use this file except in compliance with the
6 * 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 java.net.InetSocketAddress;
19 import java.util.concurrent.Executors;
20
21 import org.jboss.netty.bootstrap.ConnectionlessBootstrap;
22 import org.jboss.netty.channel.ChannelPipeline;
23 import org.jboss.netty.channel.ChannelPipelineFactory;
24 import org.jboss.netty.channel.Channels;
25 import org.jboss.netty.channel.FixedReceiveBufferSizePredictorFactory;
26 import org.jboss.netty.channel.socket.DatagramChannelFactory;
27 import org.jboss.netty.channel.socket.nio.NioDatagramChannelFactory;
28 import org.jboss.netty.handler.codec.string.StringDecoder;
29 import org.jboss.netty.handler.codec.string.StringEncoder;
30 import org.jboss.netty.util.CharsetUtil;
31
32 /**
33 * A UDP server that responds to the QOTM (quote of the moment) request to a
34 * {@link QuoteOfTheMomentClient}.
35 *
36 * Inspired by <a href="http://java.sun.com/docs/books/tutorial/networking/datagrams/clientServer.html">the official Java tutorial</a>.
37 *
38 * @author <a href="http://www.jboss.org/netty/">The Netty Project</a>
39 * @author <a href="http://gleamynode.net/">Trustin Lee</a>
40 * @version $Rev: 2104 $, $Date: 2010-01-28 16:50:28 +0900 (Thu, 28 Jan 2010) $
41 */
42 public class QuoteOfTheMomentServer {
43
44 public static void main(String[] args) throws Exception {
45 DatagramChannelFactory f =
46 new NioDatagramChannelFactory(Executors.newCachedThreadPool());
47
48 ConnectionlessBootstrap b = new ConnectionlessBootstrap(f);
49
50 // Configure the pipeline factory.
51 b.setPipelineFactory(new ChannelPipelineFactory() {
52 public ChannelPipeline getPipeline() throws Exception {
53 return Channels.pipeline(
54 new StringEncoder(CharsetUtil.ISO_8859_1),
55 new StringDecoder(CharsetUtil.ISO_8859_1),
56 new QuoteOfTheMomentServerHandler());
57 }
58 });
59
60 // Enable broadcast
61 b.setOption("broadcast", "false");
62
63 // Allow packets as large as up to 1024 bytes (default is 768).
64 // You could increase or decrease this value to avoid truncated packets
65 // or to improve memory footprint respectively.
66 //
67 // Please also note that a large UDP packet might be truncated or
68 // dropped by your router no matter how you configured this option.
69 // In UDP, a packet is truncated or dropped if it is larger than a
70 // certain size, depending on router configuration. IPv4 routers
71 // truncate and IPv6 routers drop a large packet. That's why it is
72 // safe to send small packets in UDP.
73 b.setOption(
74 "receiveBufferSizePredictorFactory",
75 new FixedReceiveBufferSizePredictorFactory(1024));
76
77 // Bind to the port and start the service.
78 b.bind(new InetSocketAddress(8080));
79 }
80 }