4.0.0 spring-reactor 1.0-SNAPSHOT spring-reactor jar http://maven.apache.org com.baeldung.spring.reactive spring-reactive-modules 1.0.0-SNAPSHOT org.springframework.boot spring-boot-starter-web org.springframework spring-web io.projectreactor reactor-bus ${reactor-bus.version} io.projectreactor reactor-core ${reactor-core.version} 2.0.8.RELEASE 2.0.8.RELEASE