[LIB-9] Separate chesshog-hedgefish module

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

diff --git a/chesshog-hedgefish/src/main/java/org/hedgecode/chess/hedgefish/HedgefishEngineRunner.java b/chesshog-hedgefish/src/main/java/org/hedgecode/chess/hedgefish/HedgefishEngineRunner.java
new file mode 100644 (file)
index 0000000..a47b3a5
--- /dev/null
+++ b/chesshog-hedgefish/src/main/java/org/hedgecode/chess/hedgefish/HedgefishEngineRunner.java
@@ -0,0 +1,85 @@
+/*
+ * Copyright (c) 2018. Developed by Hedgecode.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.hedgecode.chess.hedgefish;
+
+import org.hedgecode.chess.uci.CommandExecutor;
+import org.hedgecode.chess.uci.Engine;
+import org.hedgecode.chess.uci.EngineException;
+import org.hedgecode.chess.uci.EngineRunner;
+import org.hedgecode.chess.uci.Transmitter;
+import org.hedgecode.chess.uci.UCIConstants;
+import org.hedgecode.chess.uci.annotation.CommandDirection;
+
+/**
+ * Hedgefish UCI Engine Runner.
+ *
+ * @author Dmitry Samoshin aka gotty
+ */
+public final class HedgefishEngineRunner implements EngineRunner {
+
+    private HedgefishEngine engine;
+    private boolean isRunning;
+
+    HedgefishEngineRunner() {
+        engine = new HedgefishEngine();
+        isRunning = false;
+    }
+
+    @Override
+    public Engine init() throws EngineException {
+        if (isRunning)
+            throw new EngineException("uci.engine.already.run");
+        return engine;
+    }
+
+    @Override
+    public void run(final CommandExecutor commandExecutor) throws EngineException {
+        if (isRunning)
+            throw new EngineException("uci.engine.already.run");
+
+        Thread engineThread = new Thread(
+                new Runnable() {
+                    public void run() {
+                        Transmitter<HedgefishCommand> engineTransmitter = engine.transmitter();
+                        try {
+                            while (engineTransmitter.isActive()) {
+                                if (engineTransmitter.hasCommand()) {
+                                    HedgefishCommand command = engineTransmitter.transmitCommand();
+                                    commandExecutor.exec(
+                                            command.getName(),
+                                            CommandDirection.FROM_ENGINE,
+                                            command.getParams()
+                                    );
+                                }
+                            }
+                        } finally {
+                            commandExecutor.exec(
+                                    UCIConstants.TERMINATE,
+                                    CommandDirection.FROM_ENGINE,
+                                    null
+                            );
+                            engineTransmitter.close();
+                            isRunning = false;
+                        }
+                    }
+                }
+        );
+        engineThread.start();
+        isRunning = true;
+    }
+
+}