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November 13, 2022 12:50
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How to register different implementations of an interface in a tsyringe container based on a given parameter
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import "reflect-metadata" | |
import { | |
container, | |
injectable, | |
inject, | |
predicateAwareClassFactory, | |
} from "tsyringe" | |
export interface Logger { | |
info: (msg: string) => void | |
} | |
@injectable() | |
export class ConsoleLogger implements Logger { | |
info(msg: string): void { | |
console.log("Console Logger: ", msg) | |
} | |
} | |
@injectable() | |
export class PinoLogger implements Logger { | |
info(msg: string): void { | |
console.log("Pino Logger: ", msg) | |
} | |
} | |
const Tokens = Object.freeze({ | |
logger: "logger", | |
consoleLogger: "consoleLogger", | |
pinoLogger: "pinoLogger", | |
paymentService: "paymentService", | |
}) | |
@injectable() | |
export class PaymentService { | |
constructor(@inject(Tokens.logger) private readonly logger: Logger) { | |
this.logger = logger | |
} | |
sendMoney() { | |
this.logger.info("inversify logger info") | |
return true | |
} | |
} | |
// Varint 1: Simple get | |
// const ps = container.resolve(PinoLogger) | |
// ps.info("Lol") | |
// Variant 2: Bind to interface | |
// container.register(Tokens.logger, { | |
// useClass: ConsoleLogger, | |
// }) | |
// const ps = container.resolve(PaymentService) | |
// ps.sendMoney() | |
// Variant 3 | |
// container.register<Logger>(Tokens.logger, { | |
// useFactory: predicateAwareClassFactory<Logger>( | |
// (container) => { | |
// return process.env.NODE_ENV === "production" | |
// }, | |
// ConsoleLogger, | |
// PinoLogger | |
// ), | |
// }) | |
container.register(Tokens.logger, { | |
useFactory: () => { | |
return process.env.NODE_ENV === "production" | |
? container.resolve(PinoLogger) | |
: container.resolve(ConsoleLogger) | |
}, | |
}) | |
const ps = container.resolve(PaymentService) | |
ps.sendMoney() | |
/** | |
* instancePerContainerCachingFactory | |
* instanceCachingFactory | |
* DelayedConstructor | |
*/ |
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