io.smallrye.mutiny.operators

Class DefaultUniEmitter<T>

java.lang.Object

io.smallrye.mutiny.operators.DefaultUniEmitter<T>

Type Parameters:

T - the type of item emitted by the emitter

All Implemented Interfaces:

Cancellable, UniEmitter<T>, UniSubscription, org.reactivestreams.Subscription

public class DefaultUniEmitter<T>
extends Object
implements UniEmitter<T>, UniSubscription

Implementation of the Uni Emitter. This implementation makes sure:

• only the first event is propagated downstream
• termination action is called only once and then drop

Method Summary

Modifier and Type	Method and Description
void	cancel() Requests the Uni to cancel and clean up resources.
void	complete(T item) Emits the item event downstream with the given (potentially null) item.
void	fail(Throwable failure) Emits the failure event downstream with the given exception.
boolean	isTerminated()
UniEmitter<T>	onTermination(Runnable callback) Attaches a @{code termination} event handler invoked when the downstream UniSubscription is cancelled, or when the emitter has emitted either an item or failure event.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface io.smallrye.mutiny.subscription.UniSubscription

request

Method Detail

complete

public void complete(T item)

Description copied from interface: UniEmitter

Emits the item event downstream with the given (potentially null) item.

Calling this method multiple times or after the UniEmitter.fail(Throwable) method has no effect.

Specified by:

complete in interface UniEmitter<T>

Parameters:

item - the item, may be null

fail

public void fail(Throwable failure)

Description copied from interface: UniEmitter

Emits the failure event downstream with the given exception.

Calling this method multiple times or after the UniEmitter.complete(Object) method has no effect.

Specified by:

fail in interface UniEmitter<T>

Parameters:

failure - the exception, must not be null

onTermination

public UniEmitter<T> onTermination(Runnable callback)

Description copied from interface: UniEmitter

Attaches a @{code termination} event handler invoked when the downstream UniSubscription is cancelled, or when the emitter has emitted either an item or failure event.

This method allows cleanup resources once the emitter can be disposed (has reached a terminal state).

Specified by:

onTermination in interface UniEmitter<T>

Parameters:

callback - the action to run on termination, must not be null

Returns:

this emitter

cancel

public void cancel()

Description copied from interface: UniSubscription

Requests the Uni to cancel and clean up resources. If the item is retrieved after cancellation, it is not forwarded to the subscriber. If the cancellation happens after the delivery of the item, this call is ignored.

Calling this method, emits the cancellation event upstream.

Specified by:

cancel in interface Cancellable

Specified by:

cancel in interface UniSubscription

Specified by:

cancel in interface org.reactivestreams.Subscription

isTerminated

public boolean isTerminated()