pinafore/routes/_utils/database/cache.js

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2018-01-28 21:51:48 +01:00
import QuickLRU from 'quick-lru'
export const statusesCache = {
maxSize: 100,
caches: {}
}
export const accountsCache = {
maxSize: 50,
caches: {}
}
export const relationshipsCache = {
maxSize: 20,
caches: {}
}
export const metaCache = {
maxSize: 20,
caches: {}
}
if (process.browser && process.env.NODE_ENV !== 'production') {
window.cacheStats = {
statuses: statusesCache,
accounts: accountsCache,
relationships: relationshipsCache,
meta: metaCache
}
}
function getOrCreateInstanceCache(cache, instanceName) {
let cached = cache.caches[instanceName]
if (!cached) {
cached = cache.caches[instanceName] = new QuickLRU({maxSize: cache.maxSize})
}
return cached
}
export function clearCache(cache, instanceName) {
delete cache.caches[instanceName]
}
export function setInCache(cache, instanceName, key, value) {
let instanceCache = getOrCreateInstanceCache(cache, instanceName)
return instanceCache.set(key, value)
}
export function getInCache(cache, instanceName, key) {
let instanceCache = getOrCreateInstanceCache(cache, instanceName)
return instanceCache.get(key)
}
export function hasInCache(cache, instanceName, key) {
let instanceCache = getOrCreateInstanceCache(cache, instanceName)
let res = instanceCache.has(key)
if (process.env.NODE_ENV !== 'production') {
if (res) {
cache.hits = (cache.hits || 0) + 1
} else {
cache.misses = (cache.misses || 0) + 1
}
}
return res
}