Mercurial > hg > blitz_condensed
annotate src/org/dancres/blitz/remote/nio/EventProcessor.java @ 28:4b2f23b6feca
Add a schema compatibility check to indexer that parallels storage.
author | Dan Creswell <dan.creswell@gmail.com> |
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date | Sat, 12 Jun 2010 10:11:15 +0100 |
parents | 3dc0c5604566 |
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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 } |