Package rx.internal.operators

Class OperatorScan.InitialProducer<R>

java.lang.Object

rx.internal.operators.OperatorScan.InitialProducer<R>

All Implemented Interfaces:

Observer<R>, Producer

Enclosing class:

OperatorScan<R,T>

static final class OperatorScan.InitialProducer<R>
extends Object
implements Producer, Observer<R>

Field Summary

Fields

Modifier and Type	Field	Description
(package private) final Subscriber<? super R>	child
(package private) boolean	done
(package private) boolean	emitting
(package private) Throwable	error
(package private) boolean	missed	Missed a terminal event.
(package private) long	missedRequested	Missed a request.
(package private) Producer	producer	The current producer.
(package private) final Queue<Object>	queue
(package private) final AtomicLong	requested	The current requested amount.

Constructor Summary

Constructors

Constructor	Description
InitialProducer(R initialValue, Subscriber<? super R> child)

Method Summary

Modifier and Type	Method	Description
(package private) boolean	checkTerminated(boolean d, boolean empty, Subscriber<? super R> child)
(package private) void	emit()
(package private) void	emitLoop()
void	onCompleted()	Notifies the Observer that the Observable has finished sending push-based notifications.
void	onError(Throwable e)	Notifies the Observer that the Observable has experienced an error condition.
void	onNext(R t)	Provides the Observer with a new item to observe.
void	request(long n)	Request a certain maximum number of items from this Producer.
void	setProducer(Producer p)

Methods inherited from class java.lang.Object

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

Field Details

child

final Subscriber<? super R> child

queue

final Queue<Object> queue

emitting

boolean emitting

missed

boolean missed

Missed a terminal event.

missedRequested

long missedRequested

Missed a request.

requested

final AtomicLong requested

The current requested amount.

producer

volatile Producer producer

The current producer.

done

volatile boolean done

error

Throwable error

Constructor Details

InitialProducer

public InitialProducer(R initialValue,
 Subscriber<? super R> child)

Method Details

onNext

public void onNext(R 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 either Observer.onCompleted() or Observer.onError(java.lang.Throwable).

Specified by:

onNext in interface Observer<R>

Parameters:

t - the item emitted by the Observable

checkTerminated

boolean checkTerminated(boolean d,
 boolean empty,
 Subscriber<? super R> child)

onError

public void onError(Throwable e)

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.onCompleted().

Specified by:

onError in interface Observer<R>

Parameters:

e - the exception encountered by the Observable

onCompleted

public void onCompleted()

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(java.lang.Throwable).

Specified by:

onCompleted in interface Observer<R>

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, pass Long.MAX_VALUE to this method.

Requests are additive but if a sequence of requests totals more than Long.MAX_VALUE then Long.MAX_VALUE requests will be actioned and the extras may be ignored. Arriving at Long.MAX_VALUE by addition of requests cannot be assumed to disable backpressure. For example, the code below may result in Long.MAX_VALUE requests being actioned only.

 request(100);
 request(Long.MAX_VALUE-1);
 

Specified by:

request in interface Producer

Parameters:

n - the maximum number of items you want this Producer to produce, or Long.MAX_VALUE if you want the Producer to produce items at its own pace

setProducer

public void setProducer(Producer p)

emit

void emit()

emitLoop

void emitLoop()