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feat: SimpleDataStore allow pre-holding key

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Bobby 2022-07-06 16:37:54 +07:00
parent d31181b4be
commit ecb30cd159
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GPG Key ID: 941839794CBF5A09
1 changed files with 22 additions and 7 deletions
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27
controllers/utils/SimpleDataStore.js
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@ -34,9 +34,19 @@ class SimpleDataStore {
return this.#store.delete(key) return this.#store.delete(key)
} }
deleteStalest () {
const stalest = this.getStalest()
if (stalest) {
return this.#store.delete(stalest)
}
}
get (key) { get (key) {
const entry = this.#store.get(key) const entry = this.#store.get(key)
if (typeof entry === 'undefined') return entry // This may return undefined or null
// undefined should be an indicator for when the key legitimately has not been set,
// null should be an indicator for when the key is still being held via hold() function
if (!entry) return entry
switch (this.#strategy) { switch (this.#strategy) {
case STRATEGIES[0]: case STRATEGIES[0]:
@ -59,7 +69,7 @@ class SimpleDataStore {
case STRATEGIES[0]: case STRATEGIES[0]:
case STRATEGIES[1]: case STRATEGIES[1]:
for (const entry of this.#store) { for (const entry of this.#store) {
if (entry[1].stratval < stalest[1].stratval) { if (entry[1] && entry[1].stratval < stalest[1].stratval) {
stalest = entry stalest = entry
} }
} }
@ -70,12 +80,17 @@ class SimpleDataStore {
return stalest[0] return stalest[0]
} }
set (key, value) { hold (key) {
if (this.#store.size >= this.#limit) { if (this.#store.size >= this.#limit) {
const stalest = this.getStalest() this.deleteStalest()
if (stalest) {
this.#store.delete(stalest)
} }
return this.#store.set(key, null) && true
}
set (key, value) {
// Only do deleteStalest() if this key legitimately had not been set or held via hold()
if (this.#store.get(key) === undefined && this.#store.size >= this.#limit) {
this.deleteStalest()
} }
let stratval let stratval