Package io.reactivex.rxjava3.internal.operators.flowable

Class FlowableFlattenIterable.FlattenIterableSubscriber<T,R>

java.lang.Object

java.lang.Number

java.util.concurrent.atomic.AtomicInteger

io.reactivex.rxjava3.internal.subscriptions.BasicIntQueueSubscription<R>

io.reactivex.rxjava3.internal.operators.flowable.FlowableFlattenIterable.FlattenIterableSubscriber<T,R>

All Implemented Interfaces:

FlowableSubscriber<T>, QueueFuseable<R>, QueueSubscription<R>, SimpleQueue<R>, Serializable, org.reactivestreams.Subscriber<T>, org.reactivestreams.Subscription

Enclosing class:

FlowableFlattenIterable<T,R>

static final class FlowableFlattenIterable.FlattenIterableSubscriber<T,R>
extends BasicIntQueueSubscription<R>
implements FlowableSubscriber<T>

Field Summary

Fields

Modifier and Type	Field	Description
(package private) boolean	cancelled
(package private) int	consumed
(package private) Iterator<? extends R>	current
(package private) boolean	done
(package private) final org.reactivestreams.Subscriber<? super R>	downstream
(package private) final AtomicReference<Throwable>	error
(package private) int	fusionMode
(package private) final int	limit
(package private) final Function<? super T,? extends Iterable<? extends R>>	mapper
(package private) final int	prefetch
(package private) SimpleQueue<T>	queue
(package private) final AtomicLong	requested
private static final long	serialVersionUID
(package private) org.reactivestreams.Subscription	upstream

Fields inherited from interface io.reactivex.rxjava3.operators.QueueFuseable

ANY, ASYNC, BOUNDARY, NONE, SYNC

Constructor Summary

Constructors

Constructor	Description
FlattenIterableSubscriber(org.reactivestreams.Subscriber<? super R> actual, Function<? super T,? extends Iterable<? extends R>> mapper, int prefetch)

Method Summary

Modifier and Type	Method	Description
void	cancel()
(package private) boolean	checkTerminated(boolean d, boolean empty, org.reactivestreams.Subscriber<?> a, SimpleQueue<?> q)
void	clear()	Removes all enqueued items from this queue.
(package private) void	consumedOne(boolean enabled)
(package private) void	drain()
boolean	isEmpty()	Returns true if the queue is empty.
void	onComplete()
void	onError(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 in Subscriber.onNext(Object) is established before calling Subscription.request(long).
R	poll()	Tries to dequeue a value (non-null) or returns null if the queue is empty.
void	request(long n)
int	requestFusion(int requestedMode)	Request a fusion mode from the upstream.

Methods inherited from class io.reactivex.rxjava3.internal.subscriptions.BasicIntQueueSubscription

offer, offer

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

Methods inherited from class java.lang.Number

byteValue, shortValue

Methods inherited from class java.lang.Object

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

Field Details

serialVersionUID

private static final long serialVersionUID

See Also:

• Constant Field Values

downstream

final org.reactivestreams.Subscriber<? super R> downstream

mapper

final Function<? super T,? extends Iterable<? extends R>> mapper

prefetch

final int prefetch

limit

final int limit

requested

final AtomicLong requested

upstream

org.reactivestreams.Subscription upstream

queue

SimpleQueue<T> queue

done

volatile boolean done

cancelled

volatile boolean cancelled

error

final AtomicReference<Throwable> error

current

Iterator<? extends R> current

consumed

int consumed

fusionMode

int fusionMode

Constructor Details

FlattenIterableSubscriber

FlattenIterableSubscriber(org.reactivestreams.Subscriber<? super R> actual,
 Function<? super T,? extends Iterable<? extends R>> mapper,
 int prefetch)

Method Details

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 in Subscriber.onNext(Object) is established before calling Subscription.request(long). In practice this means no initialization should happen after the request() call and additional behavior is thread safe in respect to onNext.

Specified by:

onSubscribe in interface FlowableSubscriber<T>

Specified by:

onSubscribe in interface org.reactivestreams.Subscriber<T>

onNext

public void onNext(T t)

Specified by:

onNext in interface org.reactivestreams.Subscriber<T>

onError

public void onError(Throwable t)

Specified by:

onError in interface org.reactivestreams.Subscriber<T>

onComplete

public void onComplete()

Specified by:

onComplete in interface org.reactivestreams.Subscriber<T>

request

public void request(long n)

Specified by:

request in interface org.reactivestreams.Subscription

cancel

public void cancel()

Specified by:

cancel in interface org.reactivestreams.Subscription

drain

void drain()

consumedOne

void consumedOne(boolean enabled)

checkTerminated

boolean checkTerminated(boolean d,
 boolean empty,
 org.reactivestreams.Subscriber<?> a,
 SimpleQueue<?> q)

clear

public void clear()

Description copied from interface: SimpleQueue

Removes all enqueued items from this queue.

Specified by:

clear in interface SimpleQueue<T>

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 interface SimpleQueue<T>

Returns:

true if the queue is empty

poll

@Nullable
public R poll()
       throws Throwable

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 interface SimpleQueue<T>

Returns:

the item or null to indicate an empty queue

Throws:

Throwable - if some pre-processing of the dequeued item (usually through fused functions) throws.

requestFusion

public int requestFusion(int requestedMode)

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 interface QueueFuseable<T>

Parameters:

requestedMode - the requested fusion mode, allowed values are QueueFuseable.SYNC, QueueFuseable.ASYNC, QueueFuseable.ANY combined with QueueFuseable.BOUNDARY (e.g., requestFusion(SYNC | BOUNDARY)).

Returns:

the established fusion mode: QueueFuseable.NONE, QueueFuseable.SYNC, QueueFuseable.ASYNC.