NestJS · Middle · Question 44 of 75

What's the difference between `@MessagePattern` and `@EventPattern` in Nest microservices?

1They are aliases
✓Correct answer: @MessagePattern handles request-response messages (the caller waits for a reply); @EventPattern handles fire-and-forget events
3@EventPattern works only over HTTP

Explanation

On the client side, client.send() expects a response and client.emit() publishes an event.

Further reading

NestJS: Microservices ↗

Test yourself

Take the NestJS · Middle quiz: questions and options are shuffled, and you get a review of your mistakes at the end.