Difference between Throwing an Exceptions and Mono.error()

Features

Throwing Exceptions

Mono.error()

Usage

Gives signal errors.

Gives signal errors in reactive streams.

Compatibility

Disrupts reactive flow.

Adheres to Reactive Streams.

Error handling

Limited information, potential resource leaks.

Enables fine-grained error handling, avoids resource leaks.

Operator usage

May bypass operators.

Compatible with reactive operators.

Best practice

Generally discouraged.

Preferred approach in Spring Webflux.



Throwing an Exception vs Mono.error() in Spring WebFlux

In Spring Webflux, reactive programming is embraced, introducing concepts like Mono and Flux for asynchronous data handling. In this article, we will learn the differences between throwing exceptions and using Mono.error() in Spring Webflux.

Exceptions and Error Handling in Spring Webflux

  • Exceptions: Exceptions are commonly used in programs to indicate unexpected errors that disrupt the normal flow of execution.
  • Reactive Streams: Spring Webflux defines that errors within a reactive stream should be signaled through error notifications rather than exceptions.

Similar Reads

Mono.error()

Signaling Errors in Reactive Streams: In Spring WebFlux, we primarily utilize Mono.error() to signal errors within a Mono stream. This function accepts an exception object as an argument and returns a new Mono that emits an error notification downstream. Subsequent subscribers to this Mono will receive the error notification instead of receiving any data. Error Handling and Recovery: Subsequent operators in the reactive chain can handle error notifications using various methods like onErrorResume or onErrorReturn. These operators allow you to define custom behavior when errors occur, potentially recovering from the error or providing an alternative value....

Difference between Throwing an Exceptions and Mono.error()

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