Package com.xxl.tool.cache.impl

Class FIFOCache<K,V>

java.lang.Object

com.xxl.tool.cache.impl.ReentrantCache<K,V>

com.xxl.tool.cache.impl.FIFOCache<K,V>

All Implemented Interfaces:

Cache<K,V>, Serializable

public class FIFOCache<K,V>
extends ReentrantCache<K,V>

FIFO(first in first out) 先进先出缓存 1、元素持续添加直到存满，触发 清理全部过期对象； 2、清理后依然存满，则删除最早加入的缓存对象； 3、优劣势： - 优势：实现简单； - 劣势，热点数据无法保障常驻内存；

See Also:

• Serialized Form

Field Summary

Fields inherited from class com.xxl.tool.cache.impl.ReentrantCache

cacheMap, capacity, expireType, hitCount, listener, loader, missCount, timeout, writeLockCount, writeLockMap

Constructor Summary

Constructors

Constructor	Description
FIFOCache(int capacity, long timeout, boolean expireType)

Method Summary

Modifier and Type	Method	Description
protected int	doPrune()	1、清理全部过期对象 2、如清理后依然存满，则删除最早加入的缓存对象；

Methods inherited from class com.xxl.tool.cache.impl.ReentrantCache

asMap, capacity, clear, containsKey, get, get, getIfPresent, hitCount, isEmpty, isFull, missCount, onRemove, prune, put, remove, removeWithoutLock, setListener, setLoader, size, timeout, toString

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Details

FIFOCache

public FIFOCache(int capacity,
 long timeout,
 boolean expireType)

Method Details

doPrune

protected int doPrune()

1、清理全部过期对象 2、如清理后依然存满，则删除最早加入的缓存对象；

Specified by:

doPrune in class ReentrantCache<K,V>

Returns:

清理数据量