feat: 新增可计数的拒绝策略.

src/main/java/com/serliunx/statemanagement/machine/AbstractStateMachine.java

@@ -9,6 +9,7 @@ import java.util.List;
 import java.util.Map;
 import java.util.concurrent.Executor;
 import java.util.concurrent.ExecutorService;
+import java.util.concurrent.TimeUnit;
 import java.util.function.Consumer;
 
 /**
@@ -20,6 +21,9 @@ import java.util.function.Consumer;
  */
 public abstract class AbstractStateMachine<S> extends AbstractStateManager<S> implements StateMachine<S> {
 
+    /**
+     * 状态机上下文
+     */
     protected final StateMachineContext<S> context;
 
     /**
@@ -52,6 +56,9 @@ public abstract class AbstractStateMachine<S> extends AbstractStateManager<S> im
         if (executor instanceof ExecutorService) {
             ExecutorService es = (ExecutorService) executor;
             es.shutdown();
+            if (!es.awaitTermination(10, TimeUnit.SECONDS)) {
+                es.shutdownNow();
+            }
         } else if (executor instanceof AutoCloseable) {
             AutoCloseable ac = (AutoCloseable) executor;
             ac.close();

src/main/java/com/serliunx/statemanagement/machine/StateMachineContext.java

@@ -1,11 +1,15 @@
 package com.serliunx.statemanagement.machine;
 
 import com.serliunx.statemanagement.machine.handler.StateHandlerWrapper;
+import com.serliunx.statemanagement.support.DefaultCountableRejectedExecutionHandler;
 import com.serliunx.statemanagement.support.ExecutorUtils;
 
 import java.util.List;
 import java.util.Map;
 import java.util.concurrent.Executor;
+import java.util.concurrent.RejectedExecutionHandler;
+import java.util.concurrent.ThreadPoolExecutor;
+import java.util.concurrent.atomic.AtomicInteger;
 import java.util.function.Consumer;
 
 /**
@@ -62,7 +66,7 @@ public final class StateMachineContext<S> {
 	 */
 	private Executor executorAutoConfiguration(Executor source) {
 		if (source == null) {
-			return ExecutorUtils.adaptiveThreadPool();
+			return ExecutorUtils.adaptiveThreadPool(new DefaultCountableRejectedExecutionHandler());
 		}
 		return source;
 	}

src/main/java/com/serliunx/statemanagement/support/CountableRejectedExecutionHandler.java

@@ -0,0 +1,27 @@
+package com.serliunx.statemanagement.support;
+
+import java.util.concurrent.RejectedExecutionHandler;
+
+/**
+ * 附带计数的拒绝策略
+ *
+ * @author <a href="mailto:serliunx@yeah.net">SerLiunx</a>
+ * @version 1.0.0
+ * @since 2025/3/5
+ */
+public interface CountableRejectedExecutionHandler extends RejectedExecutionHandler {
+
+    /**
+     * 获取当前拒绝的任务数量
+     *
+     * @return 当目前为止所拒绝的任务数量
+     */
+    long getCount();
+
+    /**
+     * 获取最后一次被拒绝的任务
+     *
+     * @return  最后一次被拒绝的任务
+     */
+    Runnable getLastRejectedTask();
+}

src/main/java/com/serliunx/statemanagement/support/DefaultCountableRejectedExecutionHandler.java

@@ -0,0 +1,40 @@
+package com.serliunx.statemanagement.support;
+
+import java.util.concurrent.ThreadPoolExecutor;
+import java.util.concurrent.atomic.AtomicLong;
+
+/**
+ * 附带计数的拒绝策略默认实现(丢弃任务并计数)
+ *
+ * @author <a href="mailto:serliunx@yeah.net">SerLiunx</a>
+ * @version 1.0.0
+ * @since 2025/3/5
+ */
+public class DefaultCountableRejectedExecutionHandler implements CountableRejectedExecutionHandler {
+
+    /**
+     * 计数器
+     */
+    private final AtomicLong counter = new AtomicLong(0);
+
+    /**
+     * 最后一次被拒绝的任务
+     */
+    private volatile Runnable last = null;
+
+    @Override
+    public long getCount() {
+        return counter.get();
+    }
+
+    @Override
+    public Runnable getLastRejectedTask() {
+        return last;
+    }
+
+    @Override
+    public void rejectedExecution(Runnable r, ThreadPoolExecutor executor) {
+        last = r;
+        counter.incrementAndGet();
+    }
+}

src/main/java/com/serliunx/statemanagement/support/ExecutorUtils.java

@@ -1,9 +1,6 @@
 package com.serliunx.statemanagement.support;
 
-import java.util.concurrent.ArrayBlockingQueue;
-import java.util.concurrent.Executor;
-import java.util.concurrent.ThreadPoolExecutor;
-import java.util.concurrent.TimeUnit;
+import java.util.concurrent.*;
 
 /**
  * 线程池相关工具类
@@ -22,10 +19,11 @@ public final class ExecutorUtils {
  	 *
 	 * @return 执行器(线程池)
 	 */
-	public static Executor adaptiveThreadPool() {
+	public static Executor adaptiveThreadPool(RejectedExecutionHandler rejectedExecutionHandler) {
 		final int processors = Runtime.getRuntime().availableProcessors();
 		return new ThreadPoolExecutor(processors * 2, processors * 4, 5,
-				TimeUnit.MINUTES, new ArrayBlockingQueue<>(processors * 8), new NamedThreadFactory("state-process-%s"));
+				TimeUnit.MINUTES, new ArrayBlockingQueue<>(processors * 8),
+				new NamedThreadFactory("state-process-%s"), rejectedExecutionHandler);
 	}
 
 }

src/test/java/com/serliunx/statemanagement/MachineTest.java

@@ -42,8 +42,6 @@ public class MachineTest {
 				.build();
 
 		stateMachine.publish(PrinterEvent.TURN_ON);
-
-		stateMachine.close();
 	}
 
 	@Test