com.baeldung parent-modules 1.0.0-SNAPSHOT 4.0.0 com.baeldung vertx-and-rxjava org.apache.maven.plugins maven-compiler-plugin 1.8 1.8 io.vertx vertx-rx-java2 3.5.0.Beta1 io.vertx vertx-core 3.5.0.Beta1 io.vertx vertx-unit 3.5.0.Beta1 test junit junit 4.12 test org.slf4j slf4j-api 1.7.25 ch.qos.logback logback-classic 1.2.3 junit junit 4.12