Mercurial > hg > blitz_stable

annotate src/org/dancres/blitz/remote/nio/EventProcessor.java @ 8:fa7203ea1622

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Remove some dead code (Dave Brosius)
author Dan Creswell <dan.creswell@gmail.com>
date Sat, 23 May 2009 11:27:41 +0100
parents 3dc0c5604566
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
0
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1 package org.dancres.blitz.remote.nio;
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2
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3 import java.nio.channels.Selector;
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4 import java.nio.channels.SelectionKey;
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5 import java.nio.channels.SocketChannel;
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6 import java.nio.channels.SelectableChannel;
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7 import java.io.IOException;
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8 import java.util.Set;
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9 import java.util.Iterator;
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10 import java.util.List;
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11 import java.util.ArrayList;
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12 import java.net.Socket;
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13
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14 /**
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15 * Server-side skeleton which manages a Selector across a collection of socket
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16 * connections supplied by some external entity. Events are actually
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17 * handled by Dispatcher instances obtained from DispatcherFactory instances.
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18 *
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19 */
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20 public class EventProcessor extends Thread {
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21 private List _socketsToAdd;
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22 private Selector _selector;
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23 private DispatcherFactory _dispatcherFactory;
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24
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25 EventProcessor(Selector aSelector, DispatcherFactory aFactory) {
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26 _selector = aSelector;
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27 _socketsToAdd = new ArrayList();
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28 _dispatcherFactory = aFactory;
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29 }
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30
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31 void add(SocketChannel aSocket) {
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32 try {
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33 // System.err.println("Posting socket to add");
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34
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35 aSocket.configureBlocking(false);
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36 aSocket.socket().setTcpNoDelay(true);
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37
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38 synchronized(_socketsToAdd) {
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39 _socketsToAdd.add(aSocket);
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40 }
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41
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42 _selector.wakeup();
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43 } catch (Exception anE) {
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44 System.err.println("Failed to add");
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45 anE.printStackTrace(System.err);
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46 }
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47 }
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48
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49 public void run() {
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50 while (true) {
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51 try {
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52 _selector.select();
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53
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54 // See if we have some more sockets to add
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55 synchronized(_socketsToAdd) {
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56 if (_socketsToAdd.size() > 0) {
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57 // System.err.println("Got sockets to add");
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58
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59 _selector.selectNow();
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60
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61 Iterator myNewChannels = _socketsToAdd.iterator();
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62 while(myNewChannels.hasNext()) {
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63 SelectableChannel myChannel =
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64 (SelectableChannel) myNewChannels.next();
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65 SelectionKey myKey =
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66 myChannel.register(_selector,
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67 SelectionKey.OP_READ);
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68 myKey.attach(new ControlBlock(myKey,
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69 _dispatcherFactory.newDispatcher()));
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70 }
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71
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72 _socketsToAdd.clear();
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73 }
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74 }
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75
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76 Iterator myKeys = _selector.selectedKeys().iterator();
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77
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78 while (myKeys.hasNext()) {
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79 SelectionKey myKey = (SelectionKey) myKeys.next();
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80
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81 if (myKey.isValid()) {
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82 ControlBlock myBlock =
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83 (ControlBlock) myKey.attachment();
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84
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85 try {
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86 myBlock.process();
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87 } catch (IOException anIOE) {
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88 // System.err.println("Channel is dead - dumping it");
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89 myKey.cancel();
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90 ((SocketChannel) myKey.channel()).close();
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91 }
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92
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93 } else {
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94 // System.err.println("Channel is dead - dumping it");
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95 myKey.cancel();
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96 ((SocketChannel) myKey.channel()).close();
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97 }
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98
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99 myKeys.remove();
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100 }
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101 } catch (IOException anIOE) {
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102 System.err.println("EventProcessor error'd");
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103 anIOE.printStackTrace(System.err);
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104 }
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105 }
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106 }
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107 }