Created
June 28, 2024 16:30
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Service Locator pattern in TypeScript
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| import { CollectionsRepository } from '../repositories/collectionsRepository' | |
| import { AuthenticationService } from './authenticationService' | |
| import { CollectionsService } from './collectionsService' | |
| export class ServiceLocator { | |
| private static _cache: Record<string, any> | |
| static { | |
| console.log('Setting up cache') | |
| ServiceLocator._cache = {} | |
| } | |
| static getService(name: string) { | |
| const service = this._cache[name] | |
| if (!!service) { | |
| console.log(`${name} service is cached! Returning the cached version.`) | |
| return service | |
| } | |
| console.log(`Creating and caching ${name} service...`) | |
| if (name === AuthenticationService.name) { | |
| // Note: the place to instantiate different repositories if needed | |
| const authenticationService = new AuthenticationService() | |
| this._cache[name] = authenticationService | |
| return authenticationService | |
| } | |
| if (name === CollectionsService.name) { | |
| // Note: the place to instantiate different repositories if needed | |
| const collectionsRepository = new CollectionsRepository() | |
| const collectionsService = new CollectionsService(collectionsRepository) | |
| this._cache[name] = collectionsService | |
| return collectionsService | |
| } | |
| } | |
| } |
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