🔄Update: 实现 HeavyKeeper 算法

2025-10-23 18:37:47 +08:00
parent 1ec560dde5
commit a7db0ff0ba
4 changed files with 255 additions and 0 deletions
@@ -0,0 +1,40 @@
+package cn.hezhaohui.thumb.manager.cache;
+
+import com.github.benmanes.caffeine.cache.Cache;
+import com.github.benmanes.caffeine.cache.Caffeine;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.context.annotation.Bean;
+import org.springframework.stereotype.Component;
+
+import java.util.concurrent.TimeUnit;
+
+@Component
+@Slf4j
+public class CacheManager {
+    private TopK hotKeyDetector;
+    private Cache<String, Object> localCache;
+
+    @Bean
+    public TopK getHotKeyDetector() {
+        return hotKeyDetector = new HeavyKeeper(
+                // 监控 Top 100 Key
+                100,
+                // 宽度
+                100000,
+                // 深度
+                5,
+                // 衰减系数
+                0.92,
+                // 最小出现 10 次才记录
+                10
+        );
+    }
+
+    @Bean
+    public Cache<String, Object> localCache() {
+        return localCache = Caffeine.newBuilder()
+                .maximumSize(1000)
+                .expireAfterWrite(5, TimeUnit.MINUTES)
+                .build();
+    }
+}