Easy Error Handling

Fallback on Error

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

Create a Flux that emits 1, 2, 3 then throws a RuntimeException("Boom!"). Use onErrorReturn() to provide -1 as a fallback value. Subscribe and print all values.

Expected output: 1, 2, 3, -1 (each on a new line).

Esperado

Anterior Siguiente

Main.kt

Fallback on Error

easy⏱ 15 minkotlinreactorchallengeerror-handling

Create a Flux that emits 1, 2, 3 then throws a RuntimeException("Boom!"). Use onErrorReturn() to provide -1 as a fallback value. Subscribe and print all values.

Expected output: 1, 2, 3, -1 (each on a new line).

Why this works

onErrorReturn() catches any error signal and replaces it with a static fallback value. The stream completes normally after the fallback is emitted.

Expected output

Fallback on Error

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

Create a Flux that emits 1, 2, 3 then throws a RuntimeException("Boom!"). Use onErrorReturn() to provide -1 as a fallback value. Subscribe and print all values.

Expected output: 1, 2, 3, -1 (each on a new line).

Esperado

1 2 3 -1

Fallback on Error

easy⏱ 15 minkotlinreactorchallengeerror-handling

Create a Flux that emits 1, 2, 3 then throws a RuntimeException("Boom!"). Use onErrorReturn() to provide -1 as a fallback value. Subscribe and print all values.

Expected output: 1, 2, 3, -1 (each on a new line).

Why this works

onErrorReturn() catches any error signal and replaces it with a static fallback value. The stream completes normally after the fallback is emitted.

Expected output

1 2 3 -1