Medium Mono & Flux

Handle Empty Mono

Create an empty Mono and provide a default value of "Default Value" using the appropriate operator, then subscribe and print.

When a Mono is empty, you can provide a fallback value with defaultIfEmpty().

Default Value

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Main.kt

medium⏱ 15 minkotlinreactorchallengemono-flux

Starter

Create an empty Mono and provide a default value of "Default Value" using the appropriate operator, then subscribe and print.

When a Mono is empty, you can provide a fallback value with defaultIfEmpty().

Mono.empty() creates a Mono that completes without emitting any value. defaultIfEmpty() provides a fallback value when the upstream is empty.

Expected output

Default Value

Handle Empty Mono

Create an empty Mono and provide a default value of "Default Value" using the appropriate operator, then subscribe and print.

When a Mono is empty, you can provide a fallback value with defaultIfEmpty().

Expected

Default Value

Handle Empty Mono

medium⏱ 15 minkotlinreactorchallengemono-flux

Starter

Create an empty Mono and provide a default value of "Default Value" using the appropriate operator, then subscribe and print.

When a Mono is empty, you can provide a fallback value with defaultIfEmpty().

Why this works

Mono.empty() creates a Mono that completes without emitting any value. defaultIfEmpty() provides a fallback value when the upstream is empty.

Expected output

Default Value