Cargando

Nombra las cosas pensando en quien lee, no en quien escribe.

Tips y trucos

Abre la paleta de comandos para saltar a cualquier lugar
Explora blogs y cursos por track
Prueba el playground de código en vivo

Retos de Reactor/WebClient & WebFlux

Medium WebClient & WebFlux

Chain Reactive Calls

Traducción al español en progresoEl contenido detallado de esta lección aún se está traduciendo. Mientras tanto, se muestra en inglés.

Simulate two chained WebClient calls. First, fetch a user ID from getActiveUserId() which returns Mono<Int> with value 42. Then, use flatMap to fetch user details from getUserDetails(id) which returns Mono<String> with "User #42 - Active". Print the final result.

This pattern is fundamental for composing multiple async HTTP calls.

Esperado

User #42 - Active

Anterior Siguiente

Main.kt

Chain Reactive Calls

medium⏱ 15 minkotlinreactorchallengewebclient

Simulate two chained WebClient calls. First, fetch a user ID from getActiveUserId() which returns Mono<Int> with value 42. Then, use flatMap to fetch user details from getUserDetails(id) which returns Mono<String> with "User #42 - Active". Print the final result.

This pattern is fundamental for composing multiple async HTTP calls.

Why this works

flatMap() is the key operator for chaining async calls. It takes each emitted value, passes it to a function that returns a Publisher, and subscribes to the inner Publisher. This is how you sequence dependent HTTP calls in WebFlux.

Expected output

User #42 - Active

Optimus Agency | Desarrollo Web Profesional