Class ConfigLoaderDirector<TEnv, TConfig>

Example

Basic usage of ConfigLoaderDirector and ConfigLoaderPool to load configuration for a given environment

import {
  Config,
  IConfigLoader,
  ConfigLoaderPool,
  ConfigLoaderDirector
} from './config-loader';

type AppConfig = Config<{ apiEndpoint: string }>;

class LoaderDev implements IConfigLoader<AppConfig> {
  async load() {
    return {
      environment: 'development',
      apiEndpoint: 'http://localhost:3000'
    };
  }
}

class LoaderProd implements IConfigLoader<AppConfig> {
  async load() {
    return {
      environment: 'production',
      apiEndpoint: 'https://api.example.com'
    };
  }
}

const loaderDev = new LoaderDev();
const loaderProd = new LoaderProd();

class AppConfigPool extends ConfigLoaderPool<string, AppConfig> {
  override readonly defaultLoader = loaderDev;
}

const pool = new AppConfigPool([
  ['development', loaderDev],
  ['production', loaderProd]
]);

const director = new ConfigLoaderDirector(pool);

// Load configuration (reads process.env.NODE_ENV)
const config = await director.load();

// Customize environment resolution manually
const customConfig = await director
  .customizeEnv(() => 'production')
  .load();
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