@nivinjoseph/n-data/src/caching/cache-service.ts

Data access library for Postgres based on Knex

import { Duration } from "@nivinjoseph/n-util";


export interface CacheService
{
    /**
     * 
     * @param key 
     * @param value 
     * @param expiryDuration
     */
    store<T>(key: string, value: T, expiryDuration?: Duration): Promise<void>;
    retrieve<T>(key: string): Promise<T | null>;
    exists(key: string): Promise<boolean>;
    remove(key: string): Promise<void>;
}

// export class CacheDuration
// {
//     private constructor() { }

//     // this is deliberately private because the lowest common denominator for caching is always seconds
//     private static fromSeconds(seconds: number): number
//     {
//         given(seconds, "seconds").ensureHasValue().ensureIsNumber();

//         return seconds;
//     }

//     public static fromMinutes(minutes: number): number
//     {
//         given(minutes, "minutes").ensureHasValue().ensureIsNumber();

//         return this.fromSeconds(minutes * 60);
//     }

//     public static fromHours(hours: number): number
//     {
//         given(hours, "hours").ensureHasValue().ensureIsNumber();

//         return this.fromMinutes(hours * 60);
//     }

//     public static fromDays(days: number): number
//     {
//         given(days, "days").ensureHasValue().ensureIsNumber();

//         return this.fromHours(days * 24);
//     }
// }