A simple decorator inspired by dataloader

[onhate]

Hi there, I've create a lib heavily inspired by dataloader, that makes it easier to implement parallel async calls batching using simply annotations (or creating a custom Batcher if you want), you just need to decorate your class method with @InBatches() and all the magic happens in the background for you, check it out.

https://github.com/onhate/inbatches

import { InBatches } from 'inbatches'; class MyService { // (optional) overloaded method, where you define the keys as `number` and the return type as `string` for typings async fetch(keys: number): Promise<string>; // in reality the Decorator will wrap this method and it will never be called with a single key :) @InBatches() // This method is now batch-enabled async fetch(keys: number | number[]): Promise<string | string[]> { if (Array.isArray(keys)) { return this.db.getMany(keys); } // the Decorator will wrap this method and because of that it will never be called with a single key throw new Error('It will never be called with a single key 😉'); } } const service = new MyService(); const result = [1, 2, 3, 4, 5].map(async id => { return await service.fetch(id); }); // The result will be an array of results in the same order as the keys result.then(results => { console.log(results); // Output: [{ id: 1, name: 'Result for key 1' }, ...] });