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78 lines
2.3 KiB
JavaScript
78 lines
2.3 KiB
JavaScript
/**
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* 缓存类
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* @return {[type]} [description]
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*/
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module.exports = Class(function(){
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var caches = {};
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return {
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options: {},
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init: function(options){
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options = isObject(options) ? options : {};
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this.options = extend({
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"temp": C('data_cache_path'), //存储目录
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"prefix": C('data_cache_prefix'), //key前缀
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"expire": C('data_cache_time') //缓存时间
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}, options);
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},
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/**
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* 获取缓存值，返回一个promise
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* @param {[type]} name [description]
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* @return {[type]} [description]
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*/
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get: function(name){
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if (!(name in caches)) {
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return getPromise();
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};
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var value = caches[name];
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var data = value.data;
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var expire = value.expire * 1000;
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//永久缓存
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if (expire === 0) {
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return getPromise(data);
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};
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var time = value.time;
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if (Date.now() > (time + expire)) {
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delete caches[name];
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return getPromise();
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};
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// 这里不做深度复制，产品使用的地方根据需要做
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// var isArr = false;
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// if ((isArr = isArray(data)) || isObject) {
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// data = extend(isArr ? [] : {}, data);
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// };
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return getPromise(data);
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},
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/**
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* 设置缓存值
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* @param {[type]} name [description]
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* @param {[type]} value [description]
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* @param {[type]} expire [description]
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*/
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set: function(name, value, expire){
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if (expire === undefined) {
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expire = this.options.expire;
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};
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caches[name] = {
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expire: expire,
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time: Date.now(),
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data: value
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};
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return this;
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},
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/**
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* 移除缓存值
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* @param {[type]} name [description]
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* @return {[type]} [description]
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*/
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rm: function(name){
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delete caches[name];
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},
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/**
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* 清空缓存值
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* @return {[type]} [description]
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*/
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clear: function(){
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caches = {};
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}
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}
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}); |