Class OperatorOnBackpressureLatest.LatestEmitter<T>
- java.lang.Object
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- java.lang.Number
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- java.util.concurrent.atomic.AtomicLong
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- rx.internal.operators.OperatorOnBackpressureLatest.LatestEmitter<T>
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- Type Parameters:
T
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- All Implemented Interfaces:
java.io.Serializable
,Observer<T>
,Producer
,Subscription
- Enclosing class:
- OperatorOnBackpressureLatest<T>
static final class OperatorOnBackpressureLatest.LatestEmitter<T> extends java.util.concurrent.atomic.AtomicLong implements Producer, Subscription, Observer<T>
A terminable producer which emits the latest items on request.
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Field Summary
Fields Modifier and Type Field Description (package private) Subscriber<? super T>
child
(package private) boolean
done
(package private) boolean
emitting
Guarded by this.(package private) static java.lang.Object
EMPTY
(package private) boolean
missed
Guarded by this.(package private) static long
NOT_REQUESTED
(package private) OperatorOnBackpressureLatest.LatestSubscriber<? super T>
parent
private static long
serialVersionUID
(package private) java.lang.Throwable
terminal
Written before done, read after done.(package private) java.util.concurrent.atomic.AtomicReference<java.lang.Object>
value
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Constructor Summary
Constructors Constructor Description LatestEmitter(Subscriber<? super T> child)
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description (package private) void
emit()
boolean
isUnsubscribed()
Indicates whether thisSubscription
is currently unsubscribed.void
onCompleted()
Notifies the Observer that theObservable
has finished sending push-based notifications.void
onError(java.lang.Throwable e)
Notifies the Observer that theObservable
has experienced an error condition.void
onNext(T t)
Provides the Observer with a new item to observe.(package private) long
produced(long n)
void
request(long n)
Request a certain maximum number of items from this Producer.void
unsubscribe()
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
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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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child
final Subscriber<? super T> child
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parent
OperatorOnBackpressureLatest.LatestSubscriber<? super T> parent
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value
final java.util.concurrent.atomic.AtomicReference<java.lang.Object> value
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terminal
java.lang.Throwable terminal
Written before done, read after done.
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done
volatile boolean done
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emitting
boolean emitting
Guarded by this.
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missed
boolean missed
Guarded by this.
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EMPTY
static final java.lang.Object EMPTY
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NOT_REQUESTED
static final long NOT_REQUESTED
- See Also:
- Constant Field Values
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Constructor Detail
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LatestEmitter
public LatestEmitter(Subscriber<? super T> child)
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Method Detail
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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
long produced(long 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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onNext
public void onNext(T t)
Description copied from interface:Observer
Provides the Observer with a new item to observe.The
Observable
may call this method 0 or more times.The
Observable
will not call this method again after it calls eitherObserver.onCompleted()
orObserver.onError(java.lang.Throwable)
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onError
public void onError(java.lang.Throwable e)
Description copied from interface:Observer
Notifies the Observer that theObservable
has experienced an error condition.If the
Observable
calls this method, it will not thereafter callObserver.onNext(T)
orObserver.onCompleted()
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onCompleted
public void onCompleted()
Description copied from interface:Observer
Notifies the Observer that theObservable
has finished sending push-based notifications.The
Observable
will not call this method if it callsObserver.onError(java.lang.Throwable)
.- Specified by:
onCompleted
in interfaceObserver<T>
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emit
void emit()
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