4.0.0 com.baeldung spring-reactor jar 1.0-SNAPSHOT spring-reactor http://maven.apache.org org.springframework.boot spring-boot-starter-parent 1.4.3.RELEASE org.springframework.boot spring-boot-starter-web org.springframework spring-web io.projectreactor reactor-bus org.springframework.boot spring-boot-maven-plugin 1.8 spring-snapshots Spring Snapshots https://repo.spring.io/libs-snapshot true spring-releases Spring Releases https://repo.spring.io/libs-release