What methods of data retrieval from microservices have you used in your last project?

In my last project, the following methods were used to obtain data from microservices:

• REST API: The main method of interaction was HTTP requests (GET, POST, etc.) to RESTful services using JSON for data transfer.

• Feign Client: To simplify calls to REST services, Feign was used — a declarative HTTP client that automatically constructs requests.

• gRPC: For some high-performance services, gRPC was used — a remote procedure call protocol using protocol buffers.

• Message Broker: In some cases, data was transmitted through message brokers (e.g., Kafka or RabbitMQ) for asynchronous interaction between microservices.

Example of calling a REST service using Feign:

@FeignClient(name = "user-service")
public interface UserClient {
    @GetMapping("/users/{id}")
    User getUserById(@PathVariable("id") Long id);
}