chesshog-hedgefish/src/main/java/org/hedgecode/chess/hedgefish/HedgefishEngineRunner.java

   1 /*
   2  * Copyright (c) 2018. Developed by Hedgecode.
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * 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,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16
  17 package org.hedgecode.chess.hedgefish;
  18
  19 import org.hedgecode.chess.uci.CommandExecutor;
  20 import org.hedgecode.chess.uci.Engine;
  21 import org.hedgecode.chess.uci.EngineException;
  22 import org.hedgecode.chess.uci.EngineRunner;
  23 import org.hedgecode.chess.uci.Transmitter;
  24 import org.hedgecode.chess.uci.UCIConstants;
  25 import org.hedgecode.chess.uci.annotation.CommandDirection;
  26
  27 /**
  28  * Hedgefish UCI Engine Runner.
  29  *
  30  * @author Dmitry Samoshin aka gotty
  31  */
  32 public final class HedgefishEngineRunner implements EngineRunner {
  33
  34     private HedgefishEngine engine;
  35     private boolean isRunning;
  36
  37     HedgefishEngineRunner() {
  38         engine = new HedgefishEngine();
  39         isRunning = false;
  40     }
  41
  42     @Override
  43     public Engine init() throws EngineException {
  44         if (isRunning)
  45             throw new EngineException("uci.engine.already.run");
  46         return engine;
  47     }
  48
  49     @Override
  50     public void run(final CommandExecutor commandExecutor) throws EngineException {
  51         if (isRunning)
  52             throw new EngineException("uci.engine.already.run");
  53
  54         Thread engineThread = new Thread(
  55                 new Runnable() {
  56                     public void run() {
  57                         Transmitter<HedgefishCommand> engineTransmitter = engine.transmitter();
  58                         try {
  59                             while (engineTransmitter.isActive()) {
  60                                 if (engineTransmitter.hasCommand()) {
  61                                     HedgefishCommand command = engineTransmitter.transmitCommand();
  62                                     commandExecutor.exec(
  63                                             command.getName(),
  64                                             CommandDirection.FROM_ENGINE,
  65                                             command.getParams()
  66                                     );
  67                                 }
  68                             }
  69                         } finally {
  70                             commandExecutor.exec(
  71                                     UCIConstants.TERMINATE,
  72                                     CommandDirection.FROM_ENGINE,
  73                                     null
  74                             );
  75                             engineTransmitter.close();
  76                             isRunning = false;
  77                         }
  78                     }
  79                 }
  80         );
  81         engineThread.start();
  82         isRunning = true;
  83     }
  84
  85 }