Class FlowableOnBackpressureBuffer.BackpressureBufferSubscriber<T>
- java.lang.Object
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- java.lang.Number
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- java.util.concurrent.atomic.AtomicInteger
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- io.reactivex.rxjava3.internal.subscriptions.BasicIntQueueSubscription<T>
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- io.reactivex.rxjava3.internal.operators.flowable.FlowableOnBackpressureBuffer.BackpressureBufferSubscriber<T>
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- All Implemented Interfaces:
FlowableSubscriber<T>
,QueueFuseable<T>
,QueueSubscription<T>
,SimpleQueue<T>
,java.io.Serializable
,org.reactivestreams.Subscriber<T>
,org.reactivestreams.Subscription
- Enclosing class:
- FlowableOnBackpressureBuffer<T>
static final class FlowableOnBackpressureBuffer.BackpressureBufferSubscriber<T> extends BasicIntQueueSubscription<T> implements FlowableSubscriber<T>
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Field Summary
Fields Modifier and Type Field Description (package private) boolean
cancelled
(package private) boolean
delayError
(package private) boolean
done
(package private) org.reactivestreams.Subscriber<? super T>
downstream
(package private) java.lang.Throwable
error
(package private) Consumer<? super T>
onDropped
(package private) Action
onOverflow
(package private) boolean
outputFused
(package private) SimplePlainQueue<T>
queue
(package private) java.util.concurrent.atomic.AtomicLong
requested
private static long
serialVersionUID
(package private) org.reactivestreams.Subscription
upstream
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Constructor Summary
Constructors Constructor Description BackpressureBufferSubscriber(org.reactivestreams.Subscriber<? super T> actual, int bufferSize, boolean unbounded, boolean delayError, Action onOverflow, Consumer<? super T> onDropped)
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description void
cancel()
(package private) boolean
checkTerminated(boolean d, boolean empty, org.reactivestreams.Subscriber<? super T> a)
void
clear()
Removes all enqueued items from this queue.(package private) void
drain()
boolean
isEmpty()
Returns true if the queue is empty.void
onComplete()
void
onError(java.lang.Throwable t)
void
onNext(T t)
void
onSubscribe(org.reactivestreams.Subscription s)
Implementors of this method should make sure everything that needs to be visible inSubscriber.onNext(Object)
is established before callingSubscription.request(long)
.T
poll()
Tries to dequeue a value (non-null) or returns null if the queue is empty.void
request(long n)
int
requestFusion(int mode)
Request a fusion mode from the upstream.-
Methods inherited from class io.reactivex.rxjava3.internal.subscriptions.BasicIntQueueSubscription
offer, offer
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Methods inherited from class java.util.concurrent.atomic.AtomicInteger
accumulateAndGet, addAndGet, compareAndExchange, compareAndExchangeAcquire, compareAndExchangeRelease, compareAndSet, decrementAndGet, doubleValue, floatValue, get, getAcquire, getAndAccumulate, getAndAdd, getAndDecrement, getAndIncrement, getAndSet, getAndUpdate, getOpaque, getPlain, incrementAndGet, intValue, lazySet, longValue, set, setOpaque, setPlain, setRelease, toString, updateAndGet, weakCompareAndSet, weakCompareAndSetAcquire, weakCompareAndSetPlain, weakCompareAndSetRelease, weakCompareAndSetVolatile
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Field Detail
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serialVersionUID
private static final long serialVersionUID
- See Also:
- Constant Field Values
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downstream
final org.reactivestreams.Subscriber<? super T> downstream
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queue
final SimplePlainQueue<T> queue
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delayError
final boolean delayError
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onOverflow
final Action onOverflow
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upstream
org.reactivestreams.Subscription upstream
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cancelled
volatile boolean cancelled
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done
volatile boolean done
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error
java.lang.Throwable error
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requested
final java.util.concurrent.atomic.AtomicLong requested
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outputFused
boolean outputFused
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Method Detail
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onSubscribe
public void onSubscribe(org.reactivestreams.Subscription s)
Description copied from interface:FlowableSubscriber
Implementors of this method should make sure everything that needs to be visible inSubscriber.onNext(Object)
is established before callingSubscription.request(long)
. In practice this means no initialization should happen after therequest()
call and additional behavior is thread safe in respect toonNext
.- Specified by:
onSubscribe
in interfaceFlowableSubscriber<T>
- Specified by:
onSubscribe
in interfaceorg.reactivestreams.Subscriber<T>
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onError
public void onError(java.lang.Throwable t)
- Specified by:
onError
in interfaceorg.reactivestreams.Subscriber<T>
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onComplete
public void onComplete()
- Specified by:
onComplete
in interfaceorg.reactivestreams.Subscriber<T>
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request
public void request(long n)
- Specified by:
request
in interfaceorg.reactivestreams.Subscription
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cancel
public void cancel()
- Specified by:
cancel
in interfaceorg.reactivestreams.Subscription
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drain
void drain()
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checkTerminated
boolean checkTerminated(boolean d, boolean empty, org.reactivestreams.Subscriber<? super T> a)
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requestFusion
public int requestFusion(int mode)
Description copied from interface:QueueFuseable
Request a fusion mode from the upstream.This should be called before
onSubscribe
returns.Calling this method multiple times or after
onSubscribe
finished is not allowed and may result in undefined behavior.- Specified by:
requestFusion
in interfaceQueueFuseable<T>
- Parameters:
mode
- the requested fusion mode, allowed values areQueueFuseable.SYNC
,QueueFuseable.ASYNC
,QueueFuseable.ANY
combined withQueueFuseable.BOUNDARY
(e.g.,requestFusion(SYNC | BOUNDARY)
).- Returns:
- the established fusion mode:
QueueFuseable.NONE
,QueueFuseable.SYNC
,QueueFuseable.ASYNC
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poll
@Nullable public T poll()
Description copied from interface:SimpleQueue
Tries to dequeue a value (non-null) or returns null if the queue is empty.If the producer uses
SimpleQueue.offer(Object, Object)
and when polling in pairs, if the first poll() returns a non-null item, the second poll() is guaranteed to return a non-null item as well.- Specified by:
poll
in interfaceSimpleQueue<T>
- Returns:
- the item or null to indicate an empty queue
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clear
public void clear()
Description copied from interface:SimpleQueue
Removes all enqueued items from this queue.- Specified by:
clear
in interfaceSimpleQueue<T>
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isEmpty
public boolean isEmpty()
Description copied from interface:SimpleQueue
Returns true if the queue is empty.Note however that due to potential fused functions in
SimpleQueue.poll()
it is possible this method returns false but then poll() returns null because the fused function swallowed the available item(s).- Specified by:
isEmpty
in interfaceSimpleQueue<T>
- Returns:
- true if the queue is empty
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