4.0.0 spring-boot-sample-websocket war org.springframework.boot spring-boot-starter-parent 0.5.0.BUILD-SNAPSHOT ../../spring-boot-starters/spring-boot-starter-parent 1.7 8.0.0-RC1 org.springframework.boot.samples.websocket.config.SampleWebSocketsApplication org.springframework.boot spring-boot-starter-websocket org.springframework.boot spring-boot-starter-actuator org.springframework.boot spring-boot-maven-plugin