com.xiaoleilu.hutool.cache.impl.CacheObj Maven / Gradle / Ivy

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package com.xiaoleilu.hutool.cache.impl;

/**
 * 缓存对象
 * @author Looly
 *
 * @param  Key类型
 * @param  Value类型
 */
public class CacheObj {
	
	final K key;
	final V obj;
	
	/** 上次访问时间 */
	long lastAccess; 
	/** 访问次数 */
	long accessCount;
	/** 对象存活时长，0表示永久存活*/
	long ttl;
	
	CacheObj(K key, V obj, long ttl) {
		this.key = key;
		this.obj = obj;
		this.ttl = ttl;
		this.lastAccess = System.currentTimeMillis();
	}
	
	/**
	 * @return 是否过期
	 */
	boolean isExpired() {
		return (ttl > 0) && (lastAccess + ttl < System.currentTimeMillis());
	}
	
	/**
	 * @return 获得对象
	 */
	V get() {
		lastAccess = System.currentTimeMillis();
		accessCount++;
		return obj;
	}

	@Override
	public String toString() {
		return "CacheObj [key=" + key + ", obj=" + obj + ", lastAccess=" + lastAccess + ", accessCount=" + accessCount + ", ttl=" + ttl + "]";
	}
}