🎨 #2663 优化重复消息检查器多实例导致多守护线程的问题，修改成单例+定时任务线程池处理

weixin-java-common/src/test/java/me/chanjar/weixin/common/api/WxMessageInMemoryDuplicateCheckerSingletonTest.java

@@ -0,0 +1,45 @@
+package me.chanjar.weixin.common.api;
+
+import org.testng.annotations.Test;
+
+import java.util.concurrent.TimeUnit;
+
+import static org.testng.Assert.assertFalse;
+import static org.testng.Assert.assertTrue;
+
+/**
+ * @author jiangby
+ * @version 1.0
+ * @description: 作用
+ * @date 2022/5/26 1:46
+ */
+@Test
+public class WxMessageInMemoryDuplicateCheckerSingletonTest {
+
+  private static WxMessageInMemoryDuplicateCheckerSingleton checkerSingleton = WxMessageInMemoryDuplicateCheckerSingleton.getInstance();
+
+  public void test() throws InterruptedException {
+    Long[] msgIds = new Long[]{1L, 2L, 3L, 4L, 5L, 6L, 7L, 8L};
+
+    // 第一次检查
+    for (Long msgId : msgIds) {
+      boolean result = checkerSingleton.isDuplicate(String.valueOf(msgId));
+      assertFalse(result);
+    }
+
+    // 初始化后1S进行检查 每五秒检查一次，过期时间为15秒，过15秒再检查
+    TimeUnit.SECONDS.sleep(15);
+    for (Long msgId : msgIds) {
+      boolean result = checkerSingleton.isDuplicate(String.valueOf(msgId));
+      assertTrue(result);
+    }
+
+    // 过6秒再检查
+    TimeUnit.SECONDS.sleep(6);
+    for (Long msgId : msgIds) {
+      boolean result = checkerSingleton.isDuplicate(String.valueOf(msgId));
+      assertFalse(result);
+    }
+
+  }
+}