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64 lines
1.1 KiB
64 lines
1.1 KiB
function MemoryCache() {
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this.cache = {}
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this.size = 0
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}
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MemoryCache.prototype.add = function (key, value, time, timeoutCallback) {
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var old = this.cache[key]
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var instance = this
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var entry = {
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value: value,
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expire: time + Date.now(),
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timeout: setTimeout(function () {
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instance.delete(key)
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return (
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timeoutCallback &&
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typeof timeoutCallback === 'function' &&
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timeoutCallback(value, key)
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)
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}, time),
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}
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this.cache[key] = entry
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this.size = Object.keys(this.cache).length
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return entry
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}
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MemoryCache.prototype.delete = function (key) {
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var entry = this.cache[key]
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if (entry) {
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clearTimeout(entry.timeout)
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}
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delete this.cache[key]
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this.size = Object.keys(this.cache).length
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return null
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}
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MemoryCache.prototype.get = function (key) {
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var entry = this.cache[key]
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return entry
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}
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MemoryCache.prototype.getValue = function (key) {
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var entry = this.get(key)
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return entry && entry.value
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}
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MemoryCache.prototype.clear = function () {
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Object.keys(this.cache).forEach(function (key) {
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this.delete(key)
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}, this)
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return true
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}
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module.exports = MemoryCache
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