Type Parameters:: V - the type of the value on the topic; U - the type of the value returned to the subscriber

All Known Implementing Classes:: Subscriber.ChannelOwnershipListeners, Subscriber.CompleteOnEmpty, Subscriber.Convert, Subscriber.Filtered, Subscriber.Name, Subscriber.SubscribeTo

public static interface Subscriber.Option<V,U>

A marker interface to indicate that a class is a valid Subscriber.Option for a Subscriber.

Options to use with `NamedTopic.createSubscriber(Subscriber.Option...)`
Subscriber Option	Description
`Subscriber.Name.of(String)`	Specify subscriber group name. For each value delivered to a subscriber group, only one member of the group receives the value.
`Subscriber.Filtered.by(Filter)`	Only `Subscriber.receive()` values matching this `Filter`. Only one `Filter` per subscription group.
`Subscriber.Convert.using(ValueExtractor)`	Convert topic value using provided `ValueExtractor` prior to `Subscriber.receive()`. Only one `Converter` per subscription group.
`Subscriber.CompleteOnEmpty.enabled()`	When no values left to `Subscriber.receive()`, returned `CompletableFuture.get()` returns `null` Element. By default, returned `CompletableFuture.get()` blocks until next topic value is available to return.

All members of subscriber group share at most a single Filter and single Converter. The last Subscriber joining the group and specifying these option(s) are the ones used by all subscriber group members. Note that when both a Subscriber.Filtered.by(Filter) and Subscriber.Convert.using(ValueExtractor) are specified, the Filter is applied first and only NamedTopic values matching the filter are converted before being received by the Subscriber(s).

Interface Subscriber.Option<V,U>

Field Summary