Has anyone ever tried to run a spring boot app without the

org.jetbrains.kotlin.plugin.spring

plugin? My understanding is that the beans DSL removes some proxying so it might not require open classes? But I'm stuck at

@SpringBootApplication

because I haven't found a non-annotated equivalent.

@SpringBootApplication

is meta annotated with

@Configuration

which has by default

proxyBeanMethods = true

. If you want to avoid proxies by default, you may want to use

@Configuration(proxyBeanMethods = false)

and

@EnableAutoConfiguration

for example on your application class instead.

Ah, very cool, trying that now 🙂

I shoukd probably update https://github.com/sdeleuze/spring-kotlin-functional now that Spring Fu is kind of frozen.

Frozen as in "working well" or more "not moving too much"?

Not moving too much, functional is important for the Spring team, but Spring Fu is difficult to maintain and not consistent enough with regular Boot, so we need a better way.

Gotcha 👍

The repo I shared is super super old, but I will try to update it to provide a baseline for people wanting to use Kotlin + Spring the functional way