74 lines
1.5 KiB
JavaScript
74 lines
1.5 KiB
JavaScript
'use strict'
|
|
|
|
const LRU = require('lru-cache')
|
|
|
|
const MAX_SIZE = 50 * 1024 * 1024 // 50MB
|
|
const MAX_AGE = 3 * 60 * 1000
|
|
|
|
const MEMOIZED = new LRU({
|
|
max: MAX_SIZE,
|
|
maxAge: MAX_AGE,
|
|
length: (entry, key) => key.startsWith('key:') ? entry.data.length : entry.length
|
|
})
|
|
|
|
module.exports.clearMemoized = clearMemoized
|
|
|
|
function clearMemoized () {
|
|
const old = {}
|
|
MEMOIZED.forEach((v, k) => {
|
|
old[k] = v
|
|
})
|
|
MEMOIZED.reset()
|
|
return old
|
|
}
|
|
|
|
module.exports.put = put
|
|
|
|
function put (cache, entry, data, opts) {
|
|
pickMem(opts).set(`key:${cache}:${entry.key}`, { entry, data })
|
|
putDigest(cache, entry.integrity, data, opts)
|
|
}
|
|
|
|
module.exports.put.byDigest = putDigest
|
|
|
|
function putDigest (cache, integrity, data, opts) {
|
|
pickMem(opts).set(`digest:${cache}:${integrity}`, data)
|
|
}
|
|
|
|
module.exports.get = get
|
|
|
|
function get (cache, key, opts) {
|
|
return pickMem(opts).get(`key:${cache}:${key}`)
|
|
}
|
|
|
|
module.exports.get.byDigest = getDigest
|
|
|
|
function getDigest (cache, integrity, opts) {
|
|
return pickMem(opts).get(`digest:${cache}:${integrity}`)
|
|
}
|
|
|
|
class ObjProxy {
|
|
constructor (obj) {
|
|
this.obj = obj
|
|
}
|
|
|
|
get (key) {
|
|
return this.obj[key]
|
|
}
|
|
|
|
set (key, val) {
|
|
this.obj[key] = val
|
|
}
|
|
}
|
|
|
|
function pickMem (opts) {
|
|
if (!opts || !opts.memoize) {
|
|
return MEMOIZED
|
|
} else if (opts.memoize.get && opts.memoize.set) {
|
|
return opts.memoize
|
|
} else if (typeof opts.memoize === 'object') {
|
|
return new ObjProxy(opts.memoize)
|
|
} else {
|
|
return MEMOIZED
|
|
}
|
|
}
|