Kotlin dsl to start standalone Spring WebFlux Application

This project is based on https://github.com/sdeleuze/spring-kotlin-functional

The Main idea of this project is to provide a beautiful DSL to start a Spring Application on netty :

• Simple DSL
• No Annotation
• No JavaConfig
• No Classpath Scanning

Application dsl sample :

fun main(args: Array<String>) {
    webfluxApplication(Server.NETTY) { // or TOMCAT
    
        // group routers
        routes {
            router { routerApi(ref()) }
            router(routerStatic())
        }
        router { routerHtml(ref(), ref()) }
    
        // group beans
        beans {
            bean<UserHandler>()
            bean<Baz>()  // Primary constructor injection
        }
        bean<Bar>()
    
        mustacheTemplate()
    
        profile("foo") {
            bean<Foo>()
        }
    }.run()
}

This project use :

• Spring WebFlux Reactive web server and client
• Spring Kotlin support
• Reactor Kotlin
• Functional bean definition with Kotlin DSL (no reflection, no CGLIB proxies involved)
• WebFlux functional routing declaration with Kotlin DSL
• WebFlux and Reactor Netty native embedded server capabilities
• Gradle Kotlin DSL
• Junit 5 @BeforeAll and @AfterAll on non-static methods in Kotlin

Current master branch is based on standalone WebFlux runtime. Spring Boot is based on JavaConfig and does not provide specific support functional bean definition yet (see this issue where this is discussed). That said, it is possible to use experimentally Spring Boot + functional bean definition together via ApplicationContextInitializer, see this Spring Boot branch for a concrete example.

Build the project and run tests with ./gradlew build, create the executable JAR via ./gradlew shadowJar, and run it via java -jar build/libs/spring-kotlin-functional-1.0.0-SNAPSHOT-all.jar.