Package io.reactivex.rxjava3.internal.subscribers

Class StrictSubscriber<T>

java.lang.Object

java.lang.Number

java.util.concurrent.atomic.AtomicInteger

io.reactivex.rxjava3.internal.subscribers.StrictSubscriber<T>

Type Parameters:

T - the value type

All Implemented Interfaces:

FlowableSubscriber<T>, Serializable, org.reactivestreams.Subscriber<T>, org.reactivestreams.Subscription

public class StrictSubscriber<T>
extends AtomicInteger
implements FlowableSubscriber<T>, org.reactivestreams.Subscription

Ensures that the event flow between the upstream and downstream follow the Reactive-Streams 1.0 specification by honoring the 3 additional rules (which are omitted in standard operators due to performance reasons).

• §1.3: onNext should not be called concurrently until onSubscribe returns
• §2.3: onError or onComplete must not call cancel
• §3.9: negative requests should emit an onError(IllegalArgumentException)

In addition, if rule §2.12 (onSubscribe must be called at most once) is violated, the sequence is cancelled an onError(IllegalStateException) is emitted.

Since:

2.0.7

See Also:

• Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
(package private) boolean	done
(package private) final org.reactivestreams.Subscriber<? super T>	downstream
(package private) final AtomicThrowable	error
(package private) final AtomicBoolean	once
(package private) final AtomicLong	requested
private static final long	serialVersionUID
(package private) final AtomicReference<org.reactivestreams.Subscription>	upstream

Constructor Summary

Constructors

Constructor	Description
StrictSubscriber(org.reactivestreams.Subscriber<? super T> downstream)

Method Summary

Modifier and Type	Method	Description
void	cancel()
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).
void	request(long n)

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 T> downstream

error

final AtomicThrowable error

requested

final AtomicLong requested

upstream

final AtomicReference<org.reactivestreams.Subscription> upstream

once

final AtomicBoolean once

done

volatile boolean done

Constructor Details

StrictSubscriber

public StrictSubscriber(org.reactivestreams.Subscriber<? super T> downstream)

Method Details

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

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>