package tech.powerjob.worker.common.utils;
|
|
import com.google.common.cache.Cache;
|
import com.google.common.cache.CacheBuilder;
|
|
import java.util.function.BiConsumer;
|
|
/**
|
* LRU（Least Recently Used） 缓存
|
* before v3.1.1 使用 LinkedHashMap，但存在修改时访问报错问题，改用 Guava
|
*
|
* @author tjq
|
* @since 2020/4/8
|
*/
|
public class LRUCache<K, V> {
|
|
private final Cache<K, V> innerCache;
|
|
public LRUCache(int cacheSize) {
|
innerCache = CacheBuilder.newBuilder()
|
.concurrencyLevel(2)
|
.maximumSize(cacheSize)
|
.build();
|
}
|
|
public void forEach(BiConsumer<? super K, ? super V> action) {
|
innerCache.asMap().forEach(action);
|
}
|
|
public V get(K key) {
|
return innerCache.getIfPresent(key);
|
}
|
|
public void put(K key, V value) {
|
innerCache.put(key, value);
|
}
|
}
|
