Subscriber
interface Subscriber<T : Any!>
| java.util.concurrent.Flow.Subscriber |
A receiver of messages. The methods in this interface are invoked in strict sequential order for each Subscription.
Summary
| Public methods | |
|---|---|
| abstract Unit |
Method invoked when it is known that no additional Subscriber method invocations will occur for a Subscription that is not already terminated by error, after which no other Subscriber methods are invoked by the Subscription. |
| abstract Unit |
Method invoked upon an unrecoverable error encountered by a Publisher or Subscription, after which no other Subscriber methods are invoked by the Subscription. |
| abstract Unit |
onNext(item: T)Method invoked with a Subscription's next item. |
| abstract Unit |
onSubscribe(subscription: Flow.Subscription!)Method invoked prior to invoking any other Subscriber methods for the given Subscription. |
Public methods
onComplete
abstract fun onComplete(): Unit
Method invoked when it is known that no additional Subscriber method invocations will occur for a Subscription that is not already terminated by error, after which no other Subscriber methods are invoked by the Subscription. If this method throws an exception, resulting behavior is undefined.
onError
abstract fun onError(throwable: Throwable!): Unit
Method invoked upon an unrecoverable error encountered by a Publisher or Subscription, after which no other Subscriber methods are invoked by the Subscription. If this method itself throws an exception, resulting behavior is undefined.
| Parameters | |
|---|---|
throwable |
Throwable!: the exception |
onNext
abstract fun onNext(item: T): Unit
Method invoked with a Subscription's next item. If this method throws an exception, resulting behavior is not guaranteed, but may cause the Subscription to be cancelled.
| Parameters | |
|---|---|
item |
T: the item |
onSubscribe
abstract fun onSubscribe(subscription: Flow.Subscription!): Unit
Method invoked prior to invoking any other Subscriber methods for the given Subscription. If this method throws an exception, resulting behavior is not guaranteed, but may cause the Subscription not to be established or to be cancelled.
Typically, implementations of this method invoke subscription.request to enable receiving items.
| Parameters | |
|---|---|
subscription |
Flow.Subscription!: a new subscription |