Class DeferredScalarObserver<T,R>

java.lang.Object

java.lang.Number

java.util.concurrent.atomic.AtomicInteger

io.reactivex.rxjava3.internal.observers.BasicIntQueueDisposable<R>

io.reactivex.rxjava3.internal.observers.DeferredScalarDisposable<R>

io.reactivex.rxjava3.internal.observers.DeferredScalarObserver<T,R>

Type Parameters:

T - the input value type

R - the output value type

All Implemented Interfaces:

Observer<T>, Disposable, QueueDisposable<R>, QueueFuseable<R>, SimpleQueue<R>, Serializable

public abstract class DeferredScalarObserver<T,R>
extends DeferredScalarDisposable<R>
implements Observer<T>

A fuseable Observer that can generate 0 or 1 resulting value.

See Also:

• Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
protected Disposable	upstream	The upstream disposable.

Fields inherited from class DeferredScalarDisposable

downstream, value

Fields inherited from interface QueueFuseable

ANY, ASYNC, BOUNDARY, NONE, SYNC

Constructor Summary

Constructors

Constructor	Description
DeferredScalarObserver(Observer<? super R> downstream)	Creates a DeferredScalarObserver instance and wraps a downstream Observer.

Method Summary

Modifier and Type	Method	Description
void	dispose()	Dispose the resource, the operation should be idempotent.
void	onComplete()	Notifies the Observer that the Observable has finished sending push-based notifications.
void	onError(Throwable t)	Notifies the Observer that the Observable has experienced an error condition.
void	onSubscribe(Disposable d)	Provides the Observer with the means of cancelling (disposing) the connection (channel) with the Observable in both synchronous (from within Observer.onNext(Object)) and asynchronous manner.

Methods inherited from class DeferredScalarDisposable

clear, complete, complete, error, isDisposed, isEmpty, poll, requestFusion, tryDispose

Methods inherited from class BasicIntQueueDisposable

offer, offer

Methods inherited from class 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

Methods inherited from class Number

byteValue, shortValue

Methods inherited from class Object

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

Methods inherited from interface Observer

onNext

Field Details

upstream

protected Disposable upstream

The upstream disposable.

Constructor Details

DeferredScalarObserver

public DeferredScalarObserver(Observer<? super R> downstream)

Creates a DeferredScalarObserver instance and wraps a downstream Observer.

Parameters:

downstream - the downstream subscriber, not null (not verified)

Method Details

onSubscribe

public void onSubscribe(Disposable d)

Description copied from interface: Observer

Provides the Observer with the means of cancelling (disposing) the connection (channel) with the Observable in both synchronous (from within Observer.onNext(Object)) and asynchronous manner.

Specified by:

onSubscribe in interface Observer<T>

Parameters:

d - the Disposable instance whose Disposable.dispose() can be called anytime to cancel the connection

onError

public void onError(Throwable t)

Description copied from interface: Observer

Notifies the Observer that the Observable has experienced an error condition.

If the Observable calls this method, it will not thereafter call Observer.onNext(T) or Observer.onComplete().

Specified by:

onError in interface Observer<T>

Parameters:

t - the exception encountered by the Observable

onComplete

public void onComplete()

Description copied from interface: Observer

Notifies the Observer that the Observable has finished sending push-based notifications.

The Observable will not call this method if it calls Observer.onError(Throwable).

Specified by:

onComplete in interface Observer<T>

dispose

public void dispose()

Description copied from interface: Disposable

Dispose the resource, the operation should be idempotent.

Specified by:

dispose in interface Disposable

Overrides:

dispose in class DeferredScalarDisposable<R>