Easy Error Handling

Fallback on Error

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).

Expected

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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

Reactor Challenges/Error Handling

Easy Error Handling

Fallback on Error

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).

Expected

Previous Next

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