Interface Flow.Subscription
- Enclosing class:
- Flow
public static interface Flow.Subscription
Message control linking a 
Flow.Publisher and Flow.Subscriber.  Subscribers receive items only when requested,
 and may cancel at any time. The methods in this interface are
 intended to be invoked only by their Subscribers; usages in
 other contexts have undefined effects.- Since:
- 9
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Method Summary
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Method Details- 
requestvoid request(long n) Adds the given numbernof items to the current unfulfilled demand for this subscription. Ifnis less than or equal to zero, the Subscriber will receive anonErrorsignal with anIllegalArgumentExceptionargument. Otherwise, the Subscriber will receive up tonadditionalonNextinvocations (or fewer if terminated).- Parameters:
- n- the increment of demand; a value of- Long.MAX_VALUEmay be considered as effectively unbounded
 
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cancelvoid cancel()Causes the Subscriber to (eventually) stop receiving messages. Implementation is best-effort -- additional messages may be received after invoking this method. A cancelled subscription need not ever receive anonCompleteoronErrorsignal.
 
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