If for any reason it s still necessary to keep `spring boot kotlinlang #spring

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Title

l

Luiz Aguiar

05/16/2023, 9:37 AM

If for any reason, it's still necessary to keep

spring-boot-starter-web

, is it possible to use

Coroutines

by adding

spring-boot-starter-webflux

? will it work properly to have a

Flow

controller function for data stream?

r

Robert Jaros

05/16/2023, 10:13 AM

I think you can't use both -web and -webflux starters at the same time.

l

Luiz Aguiar

05/16/2023, 10:17 AM

you can... but not all Reactive components are available/started since the application type is still

servlet

. that's my question's point

j

Jacob

05/16/2023, 12:27 PM

If we're talking boot, there's a property you can set that will flip things to reactive mode. The reason this is guarded by a property is so that non-reactive users can put webflux on the classpath for the purposes of WebClient and still have their webserver be plain old requet-per-thread

Actually it's not really a property. its this: https://docs.spring.io/spring-boot/docs/current/reference/html/web.html#web.reactive.webflux

Adding both
spring-boot-starter-web
and
spring-boot-starter-webflux
modules in your application results in Spring Boot auto-configuring Spring MVC, not WebFlux. This behavior has been chosen because many Spring developers add
spring-boot-starter-webflux
to their Spring MVC application to use the reactive
WebClient
. You can still enforce your choice by setting the chosen application type to
SpringApplication.setWebApplicationType(WebApplicationType.REACTIVE)

l

Luiz Aguiar

05/16/2023, 1:05 PM

I think I know the answer... but the point was if it may be still possible to use Coroutines while the Spring application is set to mvc/servlet... but having

webflux

also in the classpath.

j

Jacob

05/16/2023, 2:06 PM

sure, you'll just need to wrap every entry point in a runBlocking

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