batchloader/lib/cacheloader.d.ts

BatchLoader is a utility for data fetching layer to reduce requests via batching written in TypeScript. Inspired by Facebook's DataLoader

import { MappedBatchLoader } from './mappedbatchloader';
import { IBatchLoader, MaybePromise } from './types';
export interface ICache<Key, Value> {
    clear(): void;
    delete(key: Key): boolean;
    get(key: Key): Value | undefined;
    set(key: Key, value: Value): void;
}
export declare class CacheLoader<Key, Value> implements IBatchLoader<Key, Value>, ICache<Key, MaybePromise<Value>> {
    protected loader: IBatchLoader<Key, Value>;
    cache: ICache<Key, Value>;
    promiseCache: Map<Key, Promise<Value>>;
    constructor(loader: IBatchLoader<Key, Value>, cache?: ICache<Key, Value>);
    load(key: Key): Promise<Value>;
    loadMany(keys: Key[]): Promise<Value[]>;
    mapLoader<MappedValue>(mapFn: (value: Value, key: Key) => MappedValue): MappedBatchLoader<Key, Value, MappedValue>;
    get(key: Key): Promise<Value> | undefined;
    set(key: Key, value: Value): void;
    delete(key: Key): boolean;
    clear(): void;
}
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