vertx.kt

request -> {
              mySQLClient.getConnection(res -> {
                if (res.succeeded()) {

                  SQLConnection connection = res.result();

                  // Got a connection
                  connection.query("SELECT 0", result ->
                          request.response().end("Got response " + result.result().getNumRows()));
                } else {
                  // Failed to get connection - deal with it
                  request.response().end("Failed!");
                }
              });

            }