switchIfEmpty
The switchIfEmpty is a another operator in the reactive programming and It is used to provide an alternative sequence if the source like publisher completes without emitting any Items. It essentially “switches” to a fallback Publisher when the original Publisher is empty.
When to Use switchIfEmpty
- Default Values: When we need to provide a default value if the original publisher emits nothing.
- Fallback Mechanism: When you want to handle cases where no data is produced and ensure that the subscriber always receives some data.
- Graceful Degradation: When you want to gracefully degrade functionality by providing a fallback response when the primary data source is empty.
What are flatmap and switchifempty in Spring Reactive?
Spring WebFlux is a part of the Spring Framework that provides reactive programming support for web applications. It introduces reactive types like Mono and Flux publishers which are fundamental to its programming model. Mono and Flux play crucial roles in reactive programming. The reactive programming introduces a lot of operators to handle the business logic like flatmap, onErrorResume, map, zip, just, and other reactor operators. In this article, we explain what flatmap and switchIfEmpty.
Prerequisites:
To understand this content, you should know the topics below are easy to understand.
- Spring Framework
- Spring Reactor Programming
- Publisher and Consumer Concepts
- Event flow in Reactive Streams
- Operators in Spring Reactor
- Concept of Subscription
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