Package rx.internal.operators
Class CachedObservable.ReplayProducer<T>
java.lang.Object
java.lang.Number
java.util.concurrent.atomic.AtomicLong
rx.internal.operators.CachedObservable.ReplayProducer<T>
- Type Parameters:
T
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- All Implemented Interfaces:
Serializable
,Producer
,Subscription
- Enclosing class:
CachedObservable<T>
static final class CachedObservable.ReplayProducer<T>
extends AtomicLong
implements Producer, Subscription
Keeps track of the current request amount and the replay position for a child Subscriber.
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Field Summary
FieldsModifier and TypeFieldDescription(package private) final Subscriber
<? super T> The actual child subscriber.(package private) Object[]
Contains the reference to the buffer segment in replay.(package private) int
Contains the index into the currentBuffer where the next value is expected.(package private) boolean
Indicates there is a replay going on; guarded by this.(package private) int
Contains the absolute index up until the values have been replayed so far.(package private) boolean
Indicates there were some state changes/replay attempts; guarded by this.private static final long
(package private) final CachedObservable.CacheState
<T> The cache state object. -
Constructor Summary
ConstructorsConstructorDescriptionReplayProducer
(Subscriber<? super T> child, CachedObservable.CacheState<T> state) -
Method Summary
Modifier and TypeMethodDescriptionboolean
Indicates whether thisSubscription
is currently unsubscribed.long
produced
(long n) Updates the request count to reflect values have been produced.void
replay()
Continue replaying available values if there are requests for them.void
request
(long n) Request a certain maximum number of items from this Producer.void
Stops the receipt of notifications on theSubscriber
that was registered when this Subscription was received.Methods inherited from class java.util.concurrent.atomic.AtomicLong
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
Methods inherited from class java.lang.Number
byteValue, shortValue
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Field Details
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serialVersionUID
private static final long serialVersionUID- See Also:
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child
The actual child subscriber. -
state
The cache state object. -
currentBuffer
Object[] currentBufferContains the reference to the buffer segment in replay. Accessed after reading state.size() and when emitting == true. -
currentIndexInBuffer
int currentIndexInBufferContains the index into the currentBuffer where the next value is expected. Accessed after reading state.size() and when emitting == true. -
index
int indexContains the absolute index up until the values have been replayed so far. -
emitting
boolean emittingIndicates there is a replay going on; guarded by this. -
missed
boolean missedIndicates there were some state changes/replay attempts; guarded by this.
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Constructor Details
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ReplayProducer
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Method Details
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request
public void request(long n) Description copied from interface:Producer
Request a certain maximum number of items from this Producer. This is a way of requesting backpressure. To disable backpressure, passLong.MAX_VALUE
to this method.Requests are additive but if a sequence of requests totals more than
Long.MAX_VALUE
thenLong.MAX_VALUE
requests will be actioned and the extras may be ignored. Arriving atLong.MAX_VALUE
by addition of requests cannot be assumed to disable backpressure. For example, the code below may result inLong.MAX_VALUE
requests being actioned only.request(100); request(Long.MAX_VALUE-1);
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produced
public long produced(long n) Updates the request count to reflect values have been produced.- Parameters:
n
- the produced item count, positive, not validated- Returns:
- the latest request amount after subtracting n
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isUnsubscribed
public boolean isUnsubscribed()Description copied from interface:Subscription
Indicates whether thisSubscription
is currently unsubscribed.- Specified by:
isUnsubscribed
in interfaceSubscription
- Returns:
true
if thisSubscription
is currently unsubscribed,false
otherwise
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unsubscribe
public void unsubscribe()Description copied from interface:Subscription
Stops the receipt of notifications on theSubscriber
that was registered when this Subscription was received.This allows unregistering an
Subscriber
before it has finished receiving all events (i.e. before onCompleted is called).- Specified by:
unsubscribe
in interfaceSubscription
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replay
public void replay()Continue replaying available values if there are requests for them.
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