public interface Subscription
void request(long n)No events will be sent by a
Publisheruntil demand is signaled via this method.
It can be called however often and whenever needed—but if the outstanding cumulative demand ever becomes Long.MAX_VALUE or more, it may be treated by the
Publisheras "effectively unbounded".
Whatever has been requested can be sent by the
Publisherso only signal demand for what can be safely handled.
n- the strictly positive number of elements to requests to the upstream