4.0.0 io.vertx vertx-parent 3.0.0-dev_preview1 vertx-rx 3.0.0-dev_preview1 pom Vert.x Reactive Extensions rx-java rx-groovy rx-js org.codehaus.mojo properties-maven-plugin 1.0-alpha-2 set-system-properties java.util.logging.SimpleFormatter.format %4$s: %3$s - %5$s %6$s%n