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