Interface Flow.Publisher<T>
- Type Parameters:
- T- the published item type
- All Known Subinterfaces:
- Flow.Processor<T,,- R> - HttpRequest.BodyPublisher
- All Known Implementing Classes:
- SubmissionPublisher
- Enclosing class:
- Flow
- Functional Interface:
- This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.
A producer of items (and related control messages) received by
 Subscribers.  Each current 
Flow.Subscriber receives the same
 items (via method onNext) in the same order, unless
 drops or errors are encountered. If a Publisher encounters an
 error that does not allow items to be issued to a Subscriber,
 that Subscriber receives onError, and then receives no
 further messages.  Otherwise, when it is known that no further
 messages will be issued to it, a subscriber receives 
 onComplete.  Publishers ensure that Subscriber method
 invocations for each subscription are strictly ordered in happens-before
 order.
 Publishers may vary in policy about whether drops (failures to issue an item because of resource limitations) are treated as unrecoverable errors. Publishers may also vary about whether Subscribers receive items that were produced or available before they subscribed.
- Since:
- 9
- 
Method SummaryModifier and TypeMethodDescriptionvoidsubscribe(Flow.Subscriber<? super T> subscriber) Adds the given Subscriber if possible.
- 
Method Details- 
subscribeAdds the given Subscriber if possible. If already subscribed, or the attempt to subscribe fails due to policy violations or errors, the Subscriber'sonErrormethod is invoked with anIllegalStateException. Otherwise, the Subscriber'sonSubscribemethod is invoked with a newFlow.Subscription. Subscribers may enable receiving items by invoking therequestmethod of this Subscription, and may unsubscribe by invoking itscancelmethod.- Parameters:
- subscriber- the subscriber
- Throws:
- NullPointerException- if subscriber is null
 
 
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