4.0.0 spring-boot-kotlin spring-boot-kotlin jar Demo project showing how to use non-blocking in Kotlin with Spring Boot parent-kotlin com.baeldung 1.0.0-SNAPSHOT ../parent-kotlin spring-snapshots Spring Snapshots https://repo.spring.io/snapshot true spring-milestones Spring Milestones https://repo.spring.io/milestone org.springframework.boot spring-boot-dependencies ${spring-boot.version} pom import spring-snapshots Spring Snapshots https://repo.spring.io/snapshot true spring-milestones Spring Milestones https://repo.spring.io/milestone org.jetbrains.kotlin kotlin-reflect org.jetbrains.kotlin kotlin-stdlib-jdk8 org.jetbrains.kotlinx kotlinx-coroutines-core ${kotlinx-coroutines.version} org.jetbrains.kotlinx kotlinx-coroutines-reactor ${kotlinx-coroutines.version} org.springframework.boot spring-boot-starter-webflux ${spring-boot.version} com.fasterxml.jackson.module jackson-module-kotlin org.springframework.data spring-data-r2dbc ${r2dbc.version} io.r2dbc r2dbc-h2 ${h2-r2dbc.version} io.r2dbc r2dbc-spi ${r2dbc-spi.version} org.springframework.boot spring-boot-starter-test test junit junit org.junit.jupiter junit-jupiter-api test org.junit.jupiter junit-jupiter-engine test io.projectreactor reactor-test test org.jetbrains.kotlin kotlin-maven-plugin -Xjsr305=strict spring org.jetbrains.kotlin kotlin-maven-allopen ${kotlin.version} 1.3.31 1.0.0.M1 1.0.0.M7 1.0.0.BUILD-SNAPSHOT 1.2.1 2.2.0.M2