Module io.helidon.common.reactive

Package io.helidon.common.reactive

Class BufferedProcessor<T,U>

java.lang.Object

io.helidon.common.reactive.BufferedProcessor<T,U>

Type Parameters:

T - subscribed type (input)

U - published type (output)

All Implemented Interfaces:

Flow.Processor<T,U>, Flow.Publisher<U>, Flow.Subscriber<T>, Flow.Subscription

Direct Known Subclasses:

MultiDistinctProcessor, MultiDropWhileProcessor, MultiFilterProcessor, MultiLimitProcessor, MultiMapProcessor, MultiOnErrorResumeProcessor, MultiPeekProcessor, MultiSkipProcessor, MultiTakeWhileProcessor, MultiTappedProcessor

public abstract class BufferedProcessor<T,U>
extends Object

Processor with back-pressure buffer.

Constructor Summary

Constructors

Constructor	Description
BufferedProcessor()

Method Summary

Modifier and Type	Method	Description
void	cancel()
protected void	doSubscribe(Flow.Publisher<U> delegate)	Subscribe the subscriber after the given delegate publisher.
protected void	fail(Throwable ex)	OnError downstream.
protected void	failAndCancel(Throwable ex)	OnError downstream and cancel upstream.
protected RequestedCounter	getRequestedCounter()	Returns RequestedCounter with information about requested vs.
protected SingleSubscriberHolder<U>	getSubscriber()	Processor's SingleSubscriberHolder.
protected Optional<Flow.Subscription>	getSubscription()	Processor's Flow.Subscription registered by Flow.Subscriber.onSubscribe(Flow.Subscription).
protected void	hookOnCancel(Flow.Subscription subscription)	Hook for SingleSubscriberHolder.cancel().
protected void	hookOnComplete()	Hook for Flow.Subscriber.onComplete().
protected void	hookOnError(Throwable error)	Hook for Flow.Subscriber.onError(java.lang.Throwable).
protected void	hookOnNext(T item)	Hook for Flow.Subscriber.onNext(java.lang.Object).
protected void	notEnoughRequest(U item)	Define what to do when there is not enough requests to submit item.
void	onComplete()
void	onError(Throwable ex)
void	onNext(T item)
void	onSubscribe(Flow.Subscription s)
void	request(long n)
protected void	submit(U item)	Submit an item to the subscriber.
void	subscribe(Flow.Subscriber<? super U> s)
protected void	tryComplete()	Try close processor's subscriber.
protected void	tryRequest(Flow.Subscription subscription)	Responsible for calling Flow.Subscription.request(long).

Methods inherited from class java.lang.Object

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

Constructor Detail

BufferedProcessor

public BufferedProcessor()

Method Detail

tryRequest

protected void tryRequest(Flow.Subscription subscription)

Responsible for calling Flow.Subscription.request(long).

Parameters:

subscription - Flow.Subscription to make a request from

notEnoughRequest

protected void notEnoughRequest(U item)

Define what to do when there is not enough requests to submit item.

Parameters:

item - Item for submitting

onComplete

public void onComplete()

Specified by:

onComplete in interface Flow.Subscriber<T>

request

public void request(long n)

Specified by:

request in interface Flow.Subscription

cancel

public void cancel()

Specified by:

cancel in interface Flow.Subscription

onSubscribe

public void onSubscribe(Flow.Subscription s)

Specified by:

onSubscribe in interface Flow.Subscriber<T>

onNext

public void onNext(T item)

Specified by:

onNext in interface Flow.Subscriber<T>

fail

protected void fail(Throwable ex)

OnError downstream.

Parameters:

ex - Exception to be reported downstream

failAndCancel

protected void failAndCancel(Throwable ex)

OnError downstream and cancel upstream.

Parameters:

ex - Exception to be reported downstream

onError

public void onError(Throwable ex)

Specified by:

onError in interface Flow.Subscriber<T>

subscribe

public void subscribe(Flow.Subscriber<? super U> s)

Specified by:

subscribe in interface Flow.Publisher<T>

getSubscription

protected Optional<Flow.Subscription> getSubscription()

Processor's Flow.Subscription registered by Flow.Subscriber.onSubscribe(Flow.Subscription).

Returns:

Flow.Subscription

getSubscriber

protected SingleSubscriberHolder<U> getSubscriber()

Processor's SingleSubscriberHolder.

Returns:

SingleSubscriberHolder

getRequestedCounter

protected RequestedCounter getRequestedCounter()

Returns RequestedCounter with information about requested vs. submitted items.

Returns:

RequestedCounter

submit

protected void submit(U item)

Submit an item to the subscriber.

Parameters:

item - item to be submitted

hookOnNext

protected void hookOnNext(T item)

Hook for Flow.Subscriber.onNext(java.lang.Object).

Parameters:

item - next item

hookOnError

protected void hookOnError(Throwable error)

Hook for Flow.Subscriber.onError(java.lang.Throwable).

Parameters:

error - error received

hookOnComplete

protected void hookOnComplete()

Hook for Flow.Subscriber.onComplete().

hookOnCancel

protected void hookOnCancel(Flow.Subscription subscription)

Hook for SingleSubscriberHolder.cancel().

Parameters:

subscription - of the processor for optional passing cancel event

doSubscribe

protected final void doSubscribe(Flow.Publisher<U> delegate)

Subscribe the subscriber after the given delegate publisher.

Parameters:

delegate - delegate publisher

tryComplete

protected void tryComplete()

Try close processor's subscriber.