public void execute() {
        try {
            _execute();
        } catch (Exception ex) {
            handleError(new ApiRequest(), ex, vertxResponse);
        }
    }
@author Marc Savy {@literal <msavy@redhat.com>}
gateway/platforms/vertx3/vertx3/src/main/java/io/apiman/gateway/platforms/vertx3/http/HttpPolicyAdapter.java