Ratpack.groovy

@Grapes([
  @Grab('io.ratpack:ratpack-groovy:1.5.0-rc-2'),
  @Grab('org.slf4j:slf4j-simple:1.7.25')
])
import static ratpack.groovy.Groovy.ratpack
import ratpack.jackson.*;

class User {
    String name;
    String surname;
}

ratpack {
    handlers {
        get {
            render Jackson.json(new User(name: "1", surname: "2"))
        }
        get(":name") {
            render "Hello $pathTokens.name!"
        }
    }
}