Flow.Subscription
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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.
Public Method Summary
|
abstract
void
|
cancel()
Causes the Subscriber to (eventually) stop receiving
messages.
|
|
abstract
void
|
request(long n)
Adds the given number n of items to the current
unfulfilled demand for this subscription.
|
Public Methods
public
abstract
void
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 an
onComplete or onError signal.
public
abstract
void
request
(long n)
Adds the given number n of items to the current
unfulfilled demand for this subscription. If n is
less than or equal to zero, the Subscriber will receive an
onError signal with an IllegalArgumentException argument. Otherwise, the
Subscriber will receive up to n additional onNext invocations (or fewer if terminated).
Parameters
| n |
the increment of demand; a value of Long.MAX_VALUE may be considered as effectively unbounded
|
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Last updated 2024-07-10 UTC.
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Missing the information I need","missingTheInformationINeed","thumb-down"],["Too complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2024-07-10 UTC."],[[["\u003cp\u003e\u003ccode\u003eFlow.Subscription\u003c/code\u003e manages the flow of messages between a \u003ccode\u003eFlow.Publisher\u003c/code\u003e and a \u003ccode\u003eFlow.Subscriber\u003c/code\u003e, enabling controlled message delivery and cancellation.\u003c/p\u003e\n"],["\u003cp\u003eSubscribers use \u003ccode\u003erequest(long n)\u003c/code\u003e to signal their demand for \u003ccode\u003en\u003c/code\u003e additional messages, while \u003ccode\u003ecancel()\u003c/code\u003e initiates the termination of message delivery.\u003c/p\u003e\n"],["\u003cp\u003eAlthough \u003ccode\u003ecancel()\u003c/code\u003e aims to halt message delivery, it's best-effort and subscribers might still receive some messages afterward, and termination signals like \u003ccode\u003eonComplete\u003c/code\u003e or \u003ccode\u003eonError\u003c/code\u003e are not guaranteed.\u003c/p\u003e\n"],["\u003cp\u003eRequesting a non-positive number of items through \u003ccode\u003erequest\u003c/code\u003e will result in an \u003ccode\u003eonError\u003c/code\u003e signal with an \u003ccode\u003eIllegalArgumentException\u003c/code\u003e.\u003c/p\u003e\n"]]],[],null,[]]
