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390
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1 package rep;
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2
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3 import java.io.IOException;
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4 import java.net.InetSocketAddress;
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5 import java.net.SocketException;
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6 import java.nio.channels.ClosedChannelException;
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7 import java.nio.channels.SelectionKey;
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8 import java.util.LinkedList;
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9 import java.util.Set;
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10 import java.util.concurrent.BlockingQueue;
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11 import java.util.concurrent.LinkedBlockingQueue;
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12
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13 import rep.channel.REPLogger;
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14 import rep.channel.REPSelectionKey;
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15 import rep.channel.REPSelector;
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16 import rep.channel.REPServerSocketChannel;
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17 import rep.channel.REPSocketChannel;
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18 import rep.gui.SessionManagerEvent;
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19 import rep.gui.SessionManagerGUI;
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20 import rep.handler.FirstConnector;
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21 import rep.handler.REPNode;
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22
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411
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23 /**
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24 * @author kono
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25 * Single Threaded Server Main Loop
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26 * maintain multiple connections
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27 * gui interface is provided.
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28 * Protocols are handled by our manager.
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412
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29 * We believe this is an protocol independent server.
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411
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30 */
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390
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31 public class ServerMainLoop {
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32
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33 public static REPLogger logger = REPLogger.singleton();
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34 public SessionManager manager;
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35 protected SessionManagerGUI gui;
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36 protected REPSelector<REPCommand> selector;
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37 private BlockingQueue<SessionManagerEvent> waitingEventQueue
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38 = new LinkedBlockingQueue<SessionManagerEvent>();
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39 public String myHost;
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40 private LinkedList<PacketSet> writeQueue = new LinkedList<PacketSet>();
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41 protected int receive_port;
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42 protected int parent_port;
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43 protected static final int DEFAULT_PORT = 8766;
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44 private SessionManagerEvent execAfterConnect = null;
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430
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45 private boolean running = true;
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390
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46
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47
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48 public void setReceivePort(int port) {
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49 receive_port = port;
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50 }
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51
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52 void mainLoop(SessionManager sessionManager, int port, SessionManagerGUI gui) throws IOException,
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53 SocketException, ClosedChannelException {
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54 this.gui = gui;
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55 manager = sessionManager;
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56 receive_port = port;
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57 serverInit();
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58 mainLoop();
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59 }
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60
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61 public void mainLoop() throws IOException {
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430
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62 while(running){
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399
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63 manager.checkWaitingCommandInMerge();
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390
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64 if (checkInputEvent() ||
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65 checkWaitingWrite()) {
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420
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66 continue;
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390
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67 // try to do fair execution for waiting task
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420
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68 //if(selector.selectNow() > 0) select();
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69 //continue;
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390
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70 }
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71 // now we can wait for input packet or event
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72 selector.select();
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73 select();
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74 }
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75 }
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76
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77 void serverInit() throws IOException, SocketException,
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78 ClosedChannelException {
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79 selector = REPSelector.<REPCommand>create();
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80 REPServerSocketChannel<REPCommand> ssc = REPServerSocketChannel.<REPCommand>open(new REPCommandPacker());
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81 ssc.configureBlocking(false); // Selector requires this
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82 ssc.socket().setReuseAddress(true); //reuse address 必須
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83 //getAllByNameで取れた全てのアドレスに対してbindする
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84 try {
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85 ssc.socket().bind(new InetSocketAddress("::",receive_port));
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86 } catch (SocketException e) {
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391
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87 // for some IPv6 implementation
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390
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88 ssc.socket().bind(new InetSocketAddress(receive_port));
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89 }
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90 ssc.register(selector, SelectionKey.OP_ACCEPT,null);
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91 }
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92
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93 private boolean checkInputEvent() {
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94 SessionManagerEvent e;
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95 if((e = waitingEventQueue.poll())!=null){
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96 e.exec(manager);
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97 return true;
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98 }
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99 return false;
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100 }
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430
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101
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102 public void serverStop() {
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103 running = false;
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104 selector.wakeup();
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105 }
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390
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106
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411
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107 /**
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108 * To avoid dead locks, we write a command one at a time
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109 * during select().
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110 * @return
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111 * @throws IOException
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112 */
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390
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113 private boolean checkWaitingWrite() throws IOException {
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114 PacketSet p = writeQueue.poll();
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115 if (p!=null) {
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442
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116 // sendLog(p);
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390
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117 p.channel.write(p.command);
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118 return true;
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119 }
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120 return false;
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121 }
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122
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411
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123 /**
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124 * Debug message
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125 * @param p
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126 */
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442
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127 @SuppressWarnings("unused")
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401
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128 private void sendLog(PacketSet p) {
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129 REPNode to;
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130 String s;
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450
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131 to = manager.editorList.editorByChannel(p.channel.channel);
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401
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132 if (to==null)
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133 s = p.channel.toString();
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134 else
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135 s = to.toString();
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136 logger.writeLog("writing: "+p.command+" to: " + s);
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137 }
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138
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390
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139
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399
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140 public void close(REPSocketChannel<REPCommand> channel) {
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390
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141 REPSelectionKey<REPCommand>key = channel.keyFor1(selector);
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142 REPNode handler = (REPNode)key.attachment();
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143 key.cancel();
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144 handler.cancel(channel);
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145 // we have to remove session/editor
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146 }
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147
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411
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148 /**
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149 * Main Select routing
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150 * check incoming connection request and incoming packet
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151 * A request is handled by a handler object which is attached
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152 * to the SelectionKey.
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153 * @throws IOException
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154 */
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390
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155 private void select() throws IOException {
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156
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157 Set<REPSelectionKey<REPCommand>> keys = selector.selectedKeys1();
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158 for(REPSelectionKey<REPCommand> key : keys){
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159 if(key.isAcceptable()){
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160 /*
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161 * Incoming connection. We don't know which, editor or
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162 * session manager. Assign FirstConnector to distinguish.
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163 */
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164 REPSocketChannel<REPCommand> channel = key.accept(new REPCommandPacker());
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165 logger.writeLog("SessionManager.select() : key.isAcceptable : channel = " + channel);
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166 registerChannel(channel, new FirstConnector(manager,channel));
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167 } else if(key.isReadable()){
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168 /*
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169 * Incoming packets are handled by a various forwarder.
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170 * A handler throw IOException() in case of a trouble to
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171 * close the channel.
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172 */
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173 REPNode handler = (REPNode)key.attachment();
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174 try {
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175 REPCommand command = key.channel1().read();
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176 handler.handle(command, key);
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177 } catch (IOException e) {
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178 key.cancel();
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179 handler.cancel(key.channel1());
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180 }
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181 }
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182 }
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183 }
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184
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185 public void registerChannel(REPSocketChannel<REPCommand> channel, REPNode handler) throws IOException {
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186 if(channel == null) {
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187 return;
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188 }
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189 // handler.setChannel(channel);
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190 channel.configureBlocking(false);
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191 channel.register(selector, SelectionKey.OP_READ, handler);
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192 }
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193
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194 public void setMyHostName(String localHostName) {
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195 myHost = localHostName + receive_port;
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196 setHostToEditor(myHost);
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197 }
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198
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199 public String myHost() {
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200 return myHost;
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201 }
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202
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203 private void setHostToEditor(String myHost2) {
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204 for(REPNode editor : manager.editorList.values()){
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205 if (editor.channel!=null)
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206 editor.setHost(myHost2);
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207 }
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208 }
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209
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210
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211 public void buttonPressed(SessionManagerEvent event) {
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212 try {
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213 waitingEventQueue.put(event);
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214 } catch (InterruptedException e) {}
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215 selector.wakeup();
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216 }
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217
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218 public void syncExec(SessionManagerEvent event) {
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219 try {
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220 waitingEventQueue.put(event);
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221 } catch (InterruptedException e) {
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222 }
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223 }
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224
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225 public void addWriteQueue(PacketSet packetSet) {
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226 writeQueue.addLast(packetSet);
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227 assert(writeQueue.size()<SessionManager.packetLimit) ;
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228 }
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229
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230 public void setParentPort(int port) {
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231 parent_port = port;
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232 }
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233
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234 public int getParentPort() {
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235 return parent_port;
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236 }
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237
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238 public int getPort() {
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239 return receive_port;
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240 }
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241
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242 public void execAfterConnect(SessionManagerEvent sessionManagerEvent) {
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243 execAfterConnect = sessionManagerEvent;
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244 }
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245
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246 public void afterConnect() {
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247 SessionManagerEvent e = execAfterConnect;
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248 execAfterConnect = null;
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249 if (e!=null) e.exec(manager);
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250 }
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251
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252 void removeChannel(SessionManager sessionManager, REPNode channel) {
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253 REPSelectionKey<REPCommand> key = channel.channel.keyFor1(selector);
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254 key.cancel();
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255 try {
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256 channel.channel.close1();
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257 } catch (IOException e) {
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258 }
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259 }
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260
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261 public String toString() {
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262 return ""+myHost+":"+receive_port;
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263 }
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264
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265
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266 public void setGUI(SessionManagerGUI gui) {
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267 this.gui = gui;
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268 }
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269
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270 public void setManager(SessionManager sessionManager) {
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271 manager = sessionManager;
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272 }
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273
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274 } |
