import ratpack.guice.Guice;
import ratpack.server.RatpackServer;

public class App {
  public static void main(String[] args) throws Exception {
    RatpackServer.start(ratpackServerSpec -> ratpackServerSpec.
      registry(Guice.registry(bindingsSpec -> bindingsSpec.
        module(FooModule.class)
      )).
      handlers(chain -> chain.
        get(ctx -> {
          Foo foo = ctx.get(Foo.class);
          ctx.getResponse().send(foo.msg);
        })
      )
    );
  }
}