Functional endpoints

Pragya Keshap answered on February 18, 2023 Popularity 1/10 Helpfulness 1/10

answer Functional endpoints

Functional endpoints

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The REST controllers we coded using Spring MVC were written in imperative-style programming. Reactive programming, on the other hand, is functional-style programming. Therefore, Spring WebFlux also allows an alternative way to define REST endpoints, using functional endpoints. These also use the same Reactive Core foundation.

Let's see how we can write the same order REST endpoint using a functional endpoint:

import static org.springframework.http.MediaType.APPLICATION_  JSON;
import static org.springframework.web.reactive.function.server.  RequestPredicates.*;
import static org.springframework.web.reactive.function.server.  RouterFunctions.route;
OrderRepository repository = ...
OrderHandler handler = new OrderHandler(repository);
RouterFunction<ServerResponse> route = route()
    .GET("/v1/api/orders/{id}", accept(APPLICATION_JSON),                handler::getOrderById)
    .POST("/v1/api/orders", handler::addOrder)
    .build();
public class OrderHandler {
    public Mono<ServerResponse> addOrder(ServerRequest req){
        // ...
    }
    public Mono<ServerResponse> getOrderById(ServerRequest req) {
        // ...
    }
}

https://www.baeldung.com/spring-5-functional-web

Popularity 1/10 Helpfulness 1/10 Language java

Source: Grepper

Tags: endpoints java

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Contributed on Feb 18 2023

Pragya Keshap

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