Top Description Inners Fields Constructors Methods
reactor.core.publisher

pack-priv final Class FluxOnBackpressureBufferStrategy<O>

extends InternalFluxOperator<O, O>
Class Inheritance
Imports
java.util.ArrayDeque, java.util.concurrent.atomic.AtomicIntegerFieldUpdater, .AtomicLongFieldUpdater, java.util.function.Consumer, org.reactivestreams.Subscriber, .Subscription, reactor.core.CoreSubscriber, .Exceptions, reactor.util.annotation.Nullable, reactor.util.context.Context

Buffers values if the subscriber doesn't request fast enough, bounding the buffer to a chosen size. If the buffer overflows, apply a pre-determined overflow strategy.
Authors
Stephane Maldini, Simon Baslé

Nested and Inner Type Summary

Modifier and TypeClass and Description
pack-priv static class

Field Summary

Modifier and TypeField and Description
pack-priv final BufferOverflowStrategy
pack-priv final int
pack-priv final boolean
pack-priv final Consumer<? super O>
Inherited from reactor.core.publisher.InternalFluxOperator:
optimizableOperator

Constructor Summary

AccessConstructor and Description
pack-priv
FluxOnBackpressureBufferStrategy(Flux<? extends O> source, int bufferSize, Consumer<? super O> onBufferOverflow, BufferOverflowStrategy bufferOverflowStrategy)

Method Summary

Modifier and TypeMethod and Description
public int
getPrefetch()

Overrides reactor.core.publisher.Flux.getPrefetch.

The prefetch configuration of the Flux
public Object
scanUnsafe(Scannable.Attr<T>
a Attr to resolve for the component.
key
)

Overrides reactor.core.publisher.InternalFluxOperator.scanUnsafe.

Implements reactor.core.Scannable.scanUnsafe.

This method is used internally by components to define their key-value mappings in a single place.
public CoreSubscriber<? super O>
subscribeOrReturn(CoreSubscriber<? super O> actual)

Implements abstract reactor.core.publisher.InternalFluxOperator.subscribeOrReturn.

Implements reactor.core.publisher.OptimizableOperator.subscribeOrReturn.

Allow delegation of the subscription by returning a CoreSubscriber, or force subscription encapsulation by returning null.
Inherited from reactor.core.publisher.InternalFluxOperator:
nextOptimizableSourcesourcesubscribe

Field Detail

bufferOverflowStrategyback to summary
pack-priv final BufferOverflowStrategy bufferOverflowStrategy
bufferSizeback to summary
pack-priv final int bufferSize
delayErrorback to summary
pack-priv final boolean delayError
onBufferOverflowback to summary
pack-priv final Consumer<? super O> onBufferOverflow

Constructor Detail

FluxOnBackpressureBufferStrategyback to summary
pack-priv FluxOnBackpressureBufferStrategy(Flux<? extends O> source, int bufferSize, Consumer<? super O> onBufferOverflow, BufferOverflowStrategy bufferOverflowStrategy)

Method Detail

getPrefetchback to summary
public int getPrefetch()

Overrides reactor.core.publisher.Flux.getPrefetch.

Doc from reactor.core.publisher.Flux.getPrefetch.

The prefetch configuration of the Flux

Returns:int

the prefetch configuration of the Flux, -1 if unspecified

Annotations
@Override
scanUnsafeback to summary
public Object scanUnsafe(Scannable.Attr<T> key)

Overrides reactor.core.publisher.InternalFluxOperator.scanUnsafe.

Implements reactor.core.Scannable.scanUnsafe.

Doc from reactor.core.Scannable.scanUnsafe.

This method is used internally by components to define their key-value mappings in a single place. Although it is ignoring the generic type of the Attr key, implementors should take care to return values of the correct type, and return null if no specific value is available.

For public consumption of attributes, prefer using scan(Attr), which will return a typed value and fall back to the key's default if the component didn't define any mapping.

Parameters
key:Scannable.Attr<T>

a Attr to resolve for the component.

Returns:Object

the value associated to the key for that specific component, or null if none.

Annotations
@Override
subscribeOrReturnback to summary
public CoreSubscriber<? super O> subscribeOrReturn(CoreSubscriber<? super O> actual)

Implements abstract reactor.core.publisher.InternalFluxOperator.subscribeOrReturn.

Implements reactor.core.publisher.OptimizableOperator.subscribeOrReturn.

Doc from reactor.core.publisher.OptimizableOperator.subscribeOrReturn.

Allow delegation of the subscription by returning a CoreSubscriber, or force subscription encapsulation by returning null. This can be used in conjunction with nextOptimizableSource() to perform subscription in a loop instead of by recursion.

Returns:CoreSubscriber<? super O>

next CoreSubscriber or "null" if the subscription was already done inside the method

Annotations
@Override
reactor.core.publisher back to summary

pack-priv final Class FluxOnBackpressureBufferStrategy.BackpressureBufferDropOldestSubscriber<T>

extends ArrayDeque<T>
implements InnerOperator<T, T>
Class Inheritance
All Implemented Interfaces
reactor.core.publisher.InnerOperator, reactor.core.publisher.InnerProducer, org.reactivestreams.Subscription, reactor.core.Scannable, reactor.core.publisher.InnerConsumer, reactor.core.CoreSubscriber, org.reactivestreams.Subscriber

Field Summary

Modifier and TypeField and Description
pack-priv final CoreSubscriber<? super T>
pack-priv final int
pack-priv volatile boolean
pack-priv final Context
pack-priv final boolean
pack-priv volatile boolean
pack-priv Throwable
pack-priv final Consumer<? super T>
pack-priv final BufferOverflowStrategy
pack-priv volatile long
pack-priv static final AtomicLongFieldUpdater<FluxOnBackpressureBufferStrategy.BackpressureBufferDropOldestSubscriber<T>>
pack-priv Subscription
s

pack-priv volatile int
pack-priv static final AtomicIntegerFieldUpdater<FluxOnBackpressureBufferStrategy.BackpressureBufferDropOldestSubscriber<T>>

Constructor Summary

AccessConstructor and Description
pack-priv
BackpressureBufferDropOldestSubscriber(CoreSubscriber<? super T> actual, int bufferSize, boolean delayError, Consumer<? super T> onOverflow, BufferOverflowStrategy overflowStrategy)

Method Summary

Modifier and TypeMethod and Description
public CoreSubscriber<? super T>
public void
cancel()

Implements org.reactivestreams.Subscription.cancel.

Request the Publisher to stop sending data and clean up resources.
pack-priv boolean
checkTerminated(boolean d, boolean empty, Subscriber<? super T> a)

public void
clear()

Overrides java.util.ArrayDeque.clear.

Implements java.util.Collection.clear.

Removes all of the elements from this deque.
pack-priv void
pack-priv void
innerDrain(Subscriber<? super T> a)

public void
onComplete()

Implements org.reactivestreams.Subscriber.onComplete.

Successful terminal state.
public void
onError(Throwable
the throwable signaled
t
)

Implements org.reactivestreams.Subscriber.onError.

Failed terminal state.
public void
onNext(T
the element signaled
t
)

Implements org.reactivestreams.Subscriber.onNext.

Data notification sent by the Publisher in response to requests to Subscription#request(long).
public void
onSubscribe(Subscription
the Subscription that allows requesting data via Subscription#request(long)
s
)

Implements reactor.core.CoreSubscriber.onSubscribe.

Implementors should initialize any state used by onNext(Object) before calling Subscription#request(long).
public void
request(long
the strictly positive number of elements to requests to the upstream Publisher
n
)

Implements org.reactivestreams.Subscription.request.

No events will be sent by a Publisher until demand is signaled via this method.
public Object
scanUnsafe(Scannable.Attr<T>
a Attr to resolve for the component.
key
)

Overrides default reactor.core.publisher.InnerProducer.scanUnsafe.

Implements reactor.core.Scannable.scanUnsafe.

This method is used internally by components to define their key-value mappings in a single place.
Inherited from java.util.ArrayDeque:
addaddAlladdFirstaddLastclonecontainsdescendingIteratorelementforEachgetFirstgetLastisEmptyiteratorofferofferFirstofferLastpeekpeekFirstpeekLastpollpollFirstpollLastpoppushremoveremoveremoveAllremoveFirstremoveFirstOccurrenceremoveIfremoveLastremoveLastOccurrenceretainAllsizespliteratortoArraytoArray

Field Detail

actualback to summary
pack-priv final CoreSubscriber<? super T> actual
bufferSizeback to summary
pack-priv final int bufferSize
cancelledback to summary
pack-priv volatile boolean cancelled
ctxback to summary
pack-priv final Context ctx
delayErrorback to summary
pack-priv final boolean delayError
doneback to summary
pack-priv volatile boolean done
errorback to summary
pack-priv Throwable error
onOverflowback to summary
pack-priv final Consumer<? super T> onOverflow
overflowStrategyback to summary
pack-priv final BufferOverflowStrategy overflowStrategy
requestedback to summary
pack-priv volatile long requested
REQUESTEDback to summary
pack-priv static final AtomicLongFieldUpdater<FluxOnBackpressureBufferStrategy.BackpressureBufferDropOldestSubscriber<T>> REQUESTED
sback to summary
pack-priv Subscription s
wipback to summary
pack-priv volatile int wip
WIPback to summary
pack-priv static final AtomicIntegerFieldUpdater<FluxOnBackpressureBufferStrategy.BackpressureBufferDropOldestSubscriber<T>> WIP

Constructor Detail

BackpressureBufferDropOldestSubscriberback to summary
pack-priv BackpressureBufferDropOldestSubscriber(CoreSubscriber<? super T> actual, int bufferSize, boolean delayError, Consumer<? super T> onOverflow, BufferOverflowStrategy overflowStrategy)

Method Detail

actualback to summary
public CoreSubscriber<? super T> actual()

Implements reactor.core.publisher.InnerProducer.actual.

Annotations
@Override
cancelback to summary
public void cancel()

Implements org.reactivestreams.Subscription.cancel.

Doc from org.reactivestreams.Subscription.cancel.

Request the Publisher to stop sending data and clean up resources.

Data may still be sent to meet previously signalled demand after calling cancel.

Annotations
@Override
checkTerminatedback to summary
pack-priv boolean checkTerminated(boolean d, boolean empty, Subscriber<? super T> a)
clearback to summary
public void clear()

Overrides java.util.ArrayDeque.clear.

Implements java.util.Collection.clear.

Doc from java.util.ArrayDeque.clear.

Removes all of the elements from this deque. The deque will be empty after this call returns.

Annotations
@Override
drainback to summary
pack-priv void drain()
innerDrainback to summary
pack-priv void innerDrain(Subscriber<? super T> a)
onCompleteback to summary
public void onComplete()

Implements org.reactivestreams.Subscriber.onComplete.

Doc from org.reactivestreams.Subscriber.onComplete.

Successful terminal state.

No further events will be sent even if Subscription#request(long) is invoked again.

Annotations
@Override
onErrorback to summary
public void onError(Throwable t)

Implements org.reactivestreams.Subscriber.onError.

Doc from org.reactivestreams.Subscriber.onError.

Failed terminal state.

No further events will be sent even if Subscription#request(long) is invoked again.

Parameters
t:Throwable

the throwable signaled

Annotations
@Override
onNextback to summary
public void onNext(T t)

Implements org.reactivestreams.Subscriber.onNext.

Doc from org.reactivestreams.Subscriber.onNext.

Data notification sent by the Publisher in response to requests to Subscription#request(long).

Parameters
t:T

the element signaled

Annotations
@Override
onSubscribeback to summary
public void onSubscribe(Subscription s)

Implements reactor.core.CoreSubscriber.onSubscribe.

Doc from reactor.core.CoreSubscriber.onSubscribe.

Implementors should initialize any state used by onNext(Object) before calling Subscription#request(long). Should further onNext related state modification occur, thread-safety will be required.

Note that an invalid request <= 0 will not produce an onError and will simply be ignored or reported through a debug-enabled reactor.util.Logger. Invoked after calling Publisher#subscribe(Subscriber).

No data will start flowing until Subscription#request(long) is invoked.

It is the responsibility of this Subscriber instance to call Subscription#request(long) whenever more data is wanted.

The Publisher will send notifications only in response to Subscription#request(long).

Parameters
s:Subscription

Doc from org.reactivestreams.Subscriber.onSubscribe.

the Subscription that allows requesting data via Subscription#request(long)

Annotations
@Override
requestback to summary
public void request(long n)

Implements org.reactivestreams.Subscription.request.

Doc from org.reactivestreams.Subscription.request.

No events will be sent by a Publisher until demand is signaled via this method.

It can be called however often and whenever needed—but if the outstanding cumulative demand ever becomes Long.MAX_VALUE or more, it may be treated by the Publisher as "effectively unbounded".

Whatever has been requested can be sent by the Publisher so only signal demand for what can be safely handled.

A Publisher can send less than is requested if the stream ends but then must emit either Subscriber#onError(Throwable) or Subscriber#onComplete().

Parameters
n:long

the strictly positive number of elements to requests to the upstream Publisher

Annotations
@Override
scanUnsafeback to summary
public Object scanUnsafe(Scannable.Attr<T> key)

Overrides default reactor.core.publisher.InnerProducer.scanUnsafe.

Implements reactor.core.Scannable.scanUnsafe.

Doc from reactor.core.Scannable.scanUnsafe.

This method is used internally by components to define their key-value mappings in a single place. Although it is ignoring the generic type of the Attr key, implementors should take care to return values of the correct type, and return null if no specific value is available.

For public consumption of attributes, prefer using scan(Attr), which will return a typed value and fall back to the key's default if the component didn't define any mapping.

Parameters
key:Scannable.Attr<T>

a Attr to resolve for the component.

Returns:Object

the value associated to the key for that specific component, or null if none.

Annotations
@Override
@Nullable