oxsean commented on code in PR #13607:
URL: https://github.com/apache/dubbo/pull/13607#discussion_r1451147130
##########
dubbo-common/src/main/java/org/apache/dubbo/common/utils/LRU2Cache.java:
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@@ -19,22 +19,23 @@
import java.util.LinkedHashMap;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;
+import java.util.function.Function;
/**
* LRU-2
- * </p>
+ * <p>
* When the data accessed for the first time, add it to history list. If the
size of history list reaches max capacity, eliminate the earliest data (first
in first out).
* When the data already exists in the history list, and be accessed for the
second time, then it will be put into cache.
- *
+ * </p>
* TODO, consider replacing with ConcurrentHashMap to improve performance
under concurrency
*/
public class LRU2Cache<K, V> extends LinkedHashMap<K, V> {
Review Comment:
Ok，只是加了一个computeIfAbsent，这个之前没重写缺了锁
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