4.0.0 spring-reactor 1.0-SNAPSHOT spring-reactor jar http://maven.apache.org com.baeldung parent-boot-2 0.0.1-SNAPSHOT ../parent-boot-2 org.springframework.boot spring-boot-starter-web org.springframework spring-web io.projectreactor reactor-bus ${reactor.version} io.projectreactor reactor-core ${reactor.version} 2.0.2.RELEASE 2.0.8.RELEASE