swaggerWelcome `WebFluxProperties' that could not be found

[Jo-GyuHyeon]

Inheritance of 'WebFluxConfigurationSupport' will result in an error as shown in the picture below.

Parameter 3 of method swaggerWelcome in org.springdoc.webflux.ui.SwaggerConfig required a bean of type 'org.springframework.boot.autoconfigure.web.reactive.WebFluxProperties' that could not be found.


Action:

Consider defining a bean of type 'org.springframework.boot.autoconfigure.web.reactive.WebFluxProperties' in your configuration.

This is my sample code.

@Configuration
@ConditionalOnClass(WebFluxConfigurer::class)
open class WebFluxConfiguration(
): WebFluxConfigurationSupport() {
}

@SpringBootApplication
class DemoApplication

fun main(args: Array<String>) {
  runApplication<DemoApplication>(*args)
}

---

This is my project build.gradle.kts .

import org.jetbrains.kotlin.gradle.tasks.KotlinCompile

plugins {
  id("org.springframework.boot") version "2.4.2"
  id("io.spring.dependency-management") version "1.0.11.RELEASE"
  kotlin("jvm") version "1.4.21"
  kotlin("plugin.spring") version "1.4.21"
}

group = "com.example"
version = "0.0.1-SNAPSHOT"
java.sourceCompatibility = JavaVersion.VERSION_15

repositories {
  mavenCentral()
}

dependencies {
  implementation("org.springframework.boot:spring-boot-starter-webflux")
  implementation("com.fasterxml.jackson.module:jackson-module-kotlin")
  implementation("io.projectreactor.kotlin:reactor-kotlin-extensions")
  implementation("org.jetbrains.kotlin:kotlin-reflect")
  implementation("org.jetbrains.kotlin:kotlin-stdlib-jdk8")
  implementation("org.jetbrains.kotlinx:kotlinx-coroutines-reactor")
  testImplementation("org.springframework.boot:spring-boot-starter-test")
  testImplementation("io.projectreactor:reactor-test")

  implementation("org.springframework.boot:spring-boot-starter-actuator")
  implementation("org.springdoc:springdoc-openapi-kotlin:1.5.3")
  implementation("org.springdoc:springdoc-openapi-webflux-ui:1.5.3")
}

tasks.withType<KotlinCompile> {
  kotlinOptions {
    freeCompilerArgs = listOf("-Xjsr305=strict")
    jvmTarget = "15"
  }
}

tasks.withType<Test> {
  useJUnitPlatform()
}

There was no problem with the previous version.
I desperately want help.

[patpatpat123]

Same issue, please help :)

[bnasslahsen]

You have disabled autoconfiguration, which explains this behavior.
You add this bean manually as workaround:

	@Bean
	WebFluxProperties webFluxProperties(){
		return new WebFluxProperties();
	}

This should be now fixed, with the last fix:

• You can test using the latest snapshot.

Once you have tested, let us know, and this can be released.

[shota-hizawa-reazon]

@bnasslahsen,

I'd like to try the snapshot, but I don't know how with gradle.
How can I test it?

[bnasslahsen]

You have the SNAPSHOT repository available.

Here is how you declare repositories in gradle.

[shota-hizawa-reazon]

@bnasslahsen ,
Thank you!
I tried this, then the app successfully started without errors like

Parameter 3 of method swaggerWelcome in org.springdoc.webflux.ui.SwaggerConfig required a bean of type 'org.springframework.boot.autoconfigure.web.reactive.WebFluxProperties' that could not be found.

But, I unable to access the swagger-ui.html again.

My WebFluxConfigurer:

@Configuration
@EnableWebFlux
class WebFluxConfiguration : WebFluxConfigurer {

    override fun configurePathMatching(configurer: PathMatchConfigurer) {
        configurer.addPathPrefix("/api/v1") { true }
    }
    override fun addCorsMappings(corsRegistry: CorsRegistry) {
        corsRegistry.addMapping("/**")
            .allowedHeaders("*")
            .allowedOrigins("*")
            .allowedMethods("GET", "POST", "PUT", "OPTIONS")
    }

    override fun configureHttpMessageCodecs(configurer: ServerCodecConfigurer) {
        val mapper = ObjectMapper()
            .registerModule(JavaTimeModule())
            .registerModule(KotlinModule())
            .configure(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS, false)
        configurer.defaultCodecs().jackson2JsonDecoder(Jackson2JsonDecoder(mapper))
        configurer.defaultCodecs().jackson2JsonEncoder(Jackson2JsonEncoder(mapper))
    }

    @Bean
    fun webFluxProperties(): WebFluxProperties? {
        return WebFluxProperties()
    }
}

My build.gradle.kts:

import org.springframework.boot.gradle.tasks.bundling.BootJar

plugins {
    id("spring-module")
}

springBoot {
    this.mainClass.set("jp.menu.jinrai.BackendServiceKt")
}

repositories {
    // io.confluent.ksql
    maven("https://ksqldb-maven.s3.amazonaws.com/maven/")
    maven("https://jenkins-confluent-packages-beta-maven.s3.amazonaws.com/6.1.0-beta201006024150/1/maven/")
    maven("https://repository.mulesoft.org/nexus/content/repositories/public/")
    maven {
        url = uri("https://oss.sonatype.org/content/repositories/snapshots")
        mavenContent {
            snapshotsOnly()
        }
    }
}

// Make the produced jar executable by its own (e.g. `./produced-package.jar`)
tasks.getByName<BootJar>("bootJar") {
    launchScript()
}

dependencies {
    implementation(project(":libs:jinrai-commons"))

    implementation(group = "org.springframework.boot", name = "spring-boot-starter-json")

    implementation(group = "org.springframework.boot", name = "spring-boot-starter-webflux")

    implementation(group = "io.confluent.ksql", name = "ksqldb-api-client", version = "0.14.0") {
        // Already in spring-boot-starter
        exclude(group = "org.slf4j", module = "slf4j-log4j12")
    }

    implementation(group = "org.hibernate.validator", name = "hibernate-validator", version = "6.1.6.Final")
    implementation(group = "org.springframework.boot", name = "spring-boot-starter-validation")

    implementation(group = "org.springdoc", name = "springdoc-openapi-webflux-ui", version="1.5.3")
    implementation(group = "org.springdoc", name = "springdoc-openapi-kotlin", version="1.5.3")

    implementation(group = "org.flywaydb", name = "flyway-core", version = "7.1.1")
    implementation(group = "mysql", name = "mysql-connector-java", version = "8.0.22")

    implementation(group = "org.springframework.data", name = "spring-data-r2dbc", version = "1.2.3")
    implementation(group = "dev.miku", name = "r2dbc-mysql", version = "0.8.2.RELEASE")

    testImplementation(group = "io.confluent.ksql", name = "ksqldb-functional-tests", version = "0.14.0") {
        // Already in spring-boot-starter
        exclude(group = "org.slf4j", module = "slf4j-log4j12")
    }
}

Is there somthing wrong with me?

[patpatpat123]

Also verified it is working. Looking forward to the non snapshot version. Thanks!