@Override
    public void onSubscribe(Subscription subscription) {
        this.subscription = subscription;
        subscription.request(Long.MAX_VALUE); // limit the content length to Long.MAX_VALUE
    }
An adapter of {@link HttpMessageSubscriber} to {@link Subscriber}.
resteasy/src/main/java/com/linecorp/armeria/internal/common/resteasy/HttpMessageSubscriberAdapter.java