Mercurial > hg > RemoteEditor > REPSessionManager
annotate rep/ServerMainLoop.java @ 458:c22f6833d736
synchronize Editor's waiting queue and Manager's writing queue
| author | one |
|---|---|
| date | Fri, 24 Sep 2010 02:41:13 +0900 |
| parents | 21cb16b7f3df |
| children | 66c4f6b29baf |
| rev | line source |
|---|---|
| 390 | 1 package rep; |
| 2 | |
| 3 import java.io.IOException; | |
| 4 import java.net.InetSocketAddress; | |
| 5 import java.net.SocketException; | |
| 6 import java.nio.channels.ClosedChannelException; | |
| 7 import java.nio.channels.SelectionKey; | |
|
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8 import java.util.Collection; |
| 390 | 9 import java.util.LinkedList; |
| 10 import java.util.Set; | |
| 11 import java.util.concurrent.BlockingQueue; | |
| 12 import java.util.concurrent.LinkedBlockingQueue; | |
| 13 | |
| 14 import rep.channel.REPLogger; | |
| 15 import rep.channel.REPSelectionKey; | |
| 16 import rep.channel.REPSelector; | |
| 17 import rep.channel.REPServerSocketChannel; | |
| 18 import rep.channel.REPSocketChannel; | |
| 19 import rep.gui.SessionManagerEvent; | |
| 20 import rep.gui.SessionManagerGUI; | |
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21 import rep.handler.Editor; |
| 390 | 22 import rep.handler.FirstConnector; |
| 23 import rep.handler.REPNode; | |
| 24 | |
| 411 | 25 /** |
| 26 * @author kono | |
| 27 * Single Threaded Server Main Loop | |
| 28 * maintain multiple connections | |
| 29 * gui interface is provided. | |
| 30 * Protocols are handled by our manager. | |
| 412 | 31 * We believe this is an protocol independent server. |
| 411 | 32 */ |
| 390 | 33 public class ServerMainLoop { |
| 34 | |
| 35 public static REPLogger logger = REPLogger.singleton(); | |
| 36 public SessionManager manager; | |
| 37 protected SessionManagerGUI gui; | |
| 38 protected REPSelector<REPCommand> selector; | |
| 39 private BlockingQueue<SessionManagerEvent> waitingEventQueue | |
| 40 = new LinkedBlockingQueue<SessionManagerEvent>(); | |
| 41 public String myHost; | |
| 42 private LinkedList<PacketSet> writeQueue = new LinkedList<PacketSet>(); | |
| 43 protected int receive_port; | |
| 44 protected int parent_port; | |
| 45 protected static final int DEFAULT_PORT = 8766; | |
| 46 private SessionManagerEvent execAfterConnect = null; | |
| 430 | 47 private boolean running = true; |
| 390 | 48 |
| 49 | |
| 50 public void setReceivePort(int port) { | |
| 51 receive_port = port; | |
| 52 } | |
| 53 | |
| 54 void mainLoop(SessionManager sessionManager, int port, SessionManagerGUI gui) throws IOException, | |
| 55 SocketException, ClosedChannelException { | |
| 56 this.gui = gui; | |
| 57 manager = sessionManager; | |
| 58 receive_port = port; | |
| 59 serverInit(); | |
| 60 mainLoop(); | |
| 61 } | |
| 62 | |
| 63 public void mainLoop() throws IOException { | |
| 430 | 64 while(running){ |
| 399 | 65 manager.checkWaitingCommandInMerge(); |
| 390 | 66 if (checkInputEvent() || |
| 67 checkWaitingWrite()) { | |
| 420 | 68 continue; |
| 390 | 69 // try to do fair execution for waiting task |
| 420 | 70 //if(selector.selectNow() > 0) select(); |
| 71 //continue; | |
| 390 | 72 } |
| 73 // now we can wait for input packet or event | |
| 74 selector.select(); | |
| 75 select(); | |
| 76 } | |
| 77 } | |
| 78 | |
| 79 void serverInit() throws IOException, SocketException, | |
| 80 ClosedChannelException { | |
| 81 selector = REPSelector.<REPCommand>create(); | |
| 82 REPServerSocketChannel<REPCommand> ssc = REPServerSocketChannel.<REPCommand>open(new REPCommandPacker()); | |
| 83 ssc.configureBlocking(false); // Selector requires this | |
| 84 ssc.socket().setReuseAddress(true); //reuse address 必須 | |
| 85 //getAllByNameで取れた全てのアドレスに対してbindする | |
| 86 try { | |
| 87 ssc.socket().bind(new InetSocketAddress("::",receive_port)); | |
| 88 } catch (SocketException e) { | |
| 391 | 89 // for some IPv6 implementation |
| 390 | 90 ssc.socket().bind(new InetSocketAddress(receive_port)); |
| 91 } | |
| 92 ssc.register(selector, SelectionKey.OP_ACCEPT,null); | |
| 93 } | |
| 94 | |
| 95 private boolean checkInputEvent() { | |
| 96 SessionManagerEvent e; | |
| 97 if((e = waitingEventQueue.poll())!=null){ | |
| 98 e.exec(manager); | |
| 99 return true; | |
| 100 } | |
| 101 return false; | |
| 102 } | |
| 430 | 103 |
| 104 public void serverStop() { | |
| 105 running = false; | |
| 106 selector.wakeup(); | |
| 107 } | |
| 390 | 108 |
| 411 | 109 /** |
| 110 * To avoid dead locks, we write a command one at a time | |
| 111 * during select(). | |
| 112 * @return | |
| 113 * @throws IOException | |
| 114 */ | |
| 390 | 115 private boolean checkWaitingWrite() throws IOException { |
| 116 PacketSet p = writeQueue.poll(); | |
| 117 if (p!=null) { | |
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118 sendLog(p); |
| 390 | 119 p.channel.write(p.command); |
| 120 return true; | |
| 121 } | |
| 122 return false; | |
| 123 } | |
| 124 | |
| 411 | 125 /** |
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126 * Move all command to the editor from manager's writing queue to the editor's waiting queue |
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127 * @param editor |
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128 */ |
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129 public void getWriteQueue(Editor editor) { |
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130 LinkedList<PacketSet> w = new LinkedList<PacketSet>(); |
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131 for(PacketSet p:writeQueue) { |
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132 if (p.channel==editor) { |
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133 editor.addWaitingCommand(p); |
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134 } else { |
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135 w.addLast(p); |
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136 } |
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137 } |
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138 writeQueue = w; |
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139 } |
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140 /** |
| 411 | 141 * Debug message |
| 142 * @param p | |
| 143 */ | |
| 401 | 144 private void sendLog(PacketSet p) { |
| 145 REPNode to; | |
| 146 String s; | |
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147 to = p.channel; // manager.editorList.editorByChannel(p.channel.channel); |
| 401 | 148 if (to==null) |
| 149 s = p.channel.toString(); | |
| 150 else | |
| 151 s = to.toString(); | |
| 152 logger.writeLog("writing: "+p.command+" to: " + s); | |
| 153 } | |
| 154 | |
| 390 | 155 |
| 399 | 156 public void close(REPSocketChannel<REPCommand> channel) { |
| 390 | 157 REPSelectionKey<REPCommand>key = channel.keyFor1(selector); |
| 158 REPNode handler = (REPNode)key.attachment(); | |
| 159 key.cancel(); | |
| 160 handler.cancel(channel); | |
| 161 // we have to remove session/editor | |
| 162 } | |
| 163 | |
| 411 | 164 /** |
| 165 * Main Select routing | |
| 166 * check incoming connection request and incoming packet | |
| 167 * A request is handled by a handler object which is attached | |
| 168 * to the SelectionKey. | |
| 169 * @throws IOException | |
| 170 */ | |
| 390 | 171 private void select() throws IOException { |
| 172 | |
| 173 Set<REPSelectionKey<REPCommand>> keys = selector.selectedKeys1(); | |
| 174 for(REPSelectionKey<REPCommand> key : keys){ | |
| 175 if(key.isAcceptable()){ | |
| 176 /* | |
| 177 * Incoming connection. We don't know which, editor or | |
| 178 * session manager. Assign FirstConnector to distinguish. | |
| 179 */ | |
| 180 REPSocketChannel<REPCommand> channel = key.accept(new REPCommandPacker()); | |
| 181 logger.writeLog("SessionManager.select() : key.isAcceptable : channel = " + channel); | |
| 182 registerChannel(channel, new FirstConnector(manager,channel)); | |
| 183 } else if(key.isReadable()){ | |
| 184 /* | |
| 185 * Incoming packets are handled by a various forwarder. | |
| 186 * A handler throw IOException() in case of a trouble to | |
| 187 * close the channel. | |
| 188 */ | |
| 189 REPNode handler = (REPNode)key.attachment(); | |
| 190 try { | |
| 191 REPCommand command = key.channel1().read(); | |
| 192 handler.handle(command, key); | |
| 193 } catch (IOException e) { | |
| 194 key.cancel(); | |
| 195 handler.cancel(key.channel1()); | |
| 196 } | |
| 197 } | |
| 198 } | |
| 199 } | |
| 200 | |
| 201 public void registerChannel(REPSocketChannel<REPCommand> channel, REPNode handler) throws IOException { | |
| 202 if(channel == null) { | |
| 203 return; | |
| 204 } | |
| 205 // handler.setChannel(channel); | |
| 206 channel.configureBlocking(false); | |
| 207 channel.register(selector, SelectionKey.OP_READ, handler); | |
| 208 } | |
| 209 | |
| 210 public void setMyHostName(String localHostName) { | |
| 211 myHost = localHostName + receive_port; | |
| 212 setHostToEditor(myHost); | |
| 213 } | |
| 214 | |
| 215 public String myHost() { | |
| 216 return myHost; | |
| 217 } | |
| 218 | |
| 219 private void setHostToEditor(String myHost2) { | |
| 220 for(REPNode editor : manager.editorList.values()){ | |
| 221 if (editor.channel!=null) | |
| 222 editor.setHost(myHost2); | |
| 223 } | |
| 224 } | |
| 225 | |
| 226 | |
| 227 public void buttonPressed(SessionManagerEvent event) { | |
| 228 try { | |
| 229 waitingEventQueue.put(event); | |
| 230 } catch (InterruptedException e) {} | |
| 231 selector.wakeup(); | |
| 232 } | |
| 233 | |
| 234 public void syncExec(SessionManagerEvent event) { | |
| 235 try { | |
| 236 waitingEventQueue.put(event); | |
| 237 } catch (InterruptedException e) { | |
| 238 } | |
| 239 } | |
| 240 | |
| 241 public void addWriteQueue(PacketSet packetSet) { | |
| 242 writeQueue.addLast(packetSet); | |
| 243 assert(writeQueue.size()<SessionManager.packetLimit) ; | |
| 244 } | |
| 245 | |
| 246 public void setParentPort(int port) { | |
| 247 parent_port = port; | |
| 248 } | |
| 249 | |
| 250 public int getParentPort() { | |
| 251 return parent_port; | |
| 252 } | |
| 253 | |
| 254 public int getPort() { | |
| 255 return receive_port; | |
| 256 } | |
| 257 | |
| 258 public void execAfterConnect(SessionManagerEvent sessionManagerEvent) { | |
| 259 execAfterConnect = sessionManagerEvent; | |
| 260 } | |
| 261 | |
| 262 public void afterConnect() { | |
| 263 SessionManagerEvent e = execAfterConnect; | |
| 264 execAfterConnect = null; | |
| 265 if (e!=null) e.exec(manager); | |
| 266 } | |
| 267 | |
| 268 void removeChannel(SessionManager sessionManager, REPNode channel) { | |
| 269 REPSelectionKey<REPCommand> key = channel.channel.keyFor1(selector); | |
| 270 key.cancel(); | |
| 271 try { | |
| 272 channel.channel.close1(); | |
| 273 } catch (IOException e) { | |
| 274 } | |
| 275 } | |
| 276 | |
| 277 public String toString() { | |
| 278 return ""+myHost+":"+receive_port; | |
| 279 } | |
| 280 | |
| 281 | |
| 282 public void setGUI(SessionManagerGUI gui) { | |
| 283 this.gui = gui; | |
| 284 } | |
| 285 | |
| 286 public void setManager(SessionManager sessionManager) { | |
| 287 manager = sessionManager; | |
| 288 } | |
| 289 | |
| 290 } |