package com.walker.cache;
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/**
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* 系统默认实现的一个缓存数据对象
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* <p/>系统缓存存储的都是这种对象，其中key是业务定义的key，value才是真正业务要存储的数据
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* <p/>
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* @author MikeShi
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*
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*/
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public class CacheData implements Cachable {
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/**
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*
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*/
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private static final long serialVersionUID = 2760771405355406150L;
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private String key;
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private Object value;
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private int hits = 0;//数据访问点击率
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private long timeStamp = System.currentTimeMillis();//数据时间戳，可以被系统更新
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public int getHit() {
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return hits;
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}
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public String getKey() {
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return key;
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}
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public long getTimeStamp() {
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return timeStamp;
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}
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public Object getValue() {
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return value;
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}
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public void hit() {
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//是否会超过最大值，暂时不做计数
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// hits++;
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}
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public boolean isExpired(long timeOut, long currentMillis) {
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return (currentMillis - timeStamp >= timeOut);
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}
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public void setKey(String key) {
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this.key = key;
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}
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public void setTimeStamp(long currentMillisecond) {
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timeStamp = currentMillisecond;
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}
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public void setValue(Object value) {
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this.value = value;
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}
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public String toString(){
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StringBuilder sb = new StringBuilder();
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sb.append("[key = ");
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sb.append(key);
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sb.append(", value = ");
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sb.append(value);
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sb.append(", hits = ");
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sb.append(hits);
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sb.append(", timeStamp = ");
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sb.append(timeStamp);
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sb.append("]");
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return sb.toString();
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}
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public int hashCode(){
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return key.hashCode();
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}
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public boolean equals(Object o){
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if(o == null){
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return false;
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}
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if(o == this){
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return true;
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}
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if(o instanceof Cachable){
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Cachable cd = (Cachable)o;
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if(cd.getKey().equals(this.key)){
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return true;
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}
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}
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return false;
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}
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}
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