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Cache - support expiration dates

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This commit is contained in:
Garrett Mills 2021-03-09 10:38:02 -06:00
parent 088fdfb1ef
commit be32976498
Signed by: garrettmills
GPG Key ID: D2BF5FBA8298F246
2 changed files with 17 additions and 6 deletions
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3
src/support/cache/Cache.ts vendored
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@ -13,8 +13,9 @@ export abstract class Cache {
* Store the given value in the cache by key. * Store the given value in the cache by key.
* @param {string} key * @param {string} key
* @param {string} value * @param {string} value
* @param {Date} [expires]
*/ */
public abstract put(key: string, value: string): void | Promise<void>; public abstract put(key: string, value: string, expires?: Date): void | Promise<void>;
/** /**
* Check if the cache has the given key. * Check if the cache has the given key.

20
src/support/cache/MemoryCache.ts vendored
View File

@ -2,24 +2,34 @@ import {Collection} from "@extollo/util"
import {Cache} from "./Cache" import {Cache} from "./Cache"
export class MemoryCache extends Cache { export class MemoryCache extends Cache {
private static cacheItems: Collection<{key: string, value: string}> = new Collection<{key: string; value: string}>() private static cacheItems: Collection<{key: string, value: string, expires?: Date}> = new Collection<{key: string; value: string, expires?: Date}>()
public fetch(key: string): string | Promise<string | undefined> | undefined { public fetch(key: string): string | Promise<string | undefined> | undefined {
const now = new Date()
return MemoryCache.cacheItems return MemoryCache.cacheItems
.firstWhere('key', '=', key)?.value .where('key', '=', key)
.firstWhere(item => {
return !item.expires || now < item.expires
})?.value
} }
public put(key: string, value: string): void | Promise<void> { public put(key: string, value: string, expires?: Date): void | Promise<void> {
const existing = MemoryCache.cacheItems.firstWhere('key', '=', key) const existing = MemoryCache.cacheItems.firstWhere('key', '=', key)
if ( existing ) { if ( existing ) {
existing.value = value existing.value = value
existing.expires = expires
} else { } else {
MemoryCache.cacheItems.push({ key, value }) MemoryCache.cacheItems.push({ key, value, expires })
} }
} }
public has(key: string): boolean | Promise<boolean> { public has(key: string): boolean | Promise<boolean> {
return !!MemoryCache.cacheItems.firstWhere('key', '=', key) const now = new Date()
return !!MemoryCache.cacheItems
.where('key', '=', key)
.firstWhere(item => {
return !item.expires || now < item.expires
})
} }
public drop(key: string): void | Promise<void> { public drop(key: string): void | Promise<void> {