Class MaybeMergeArray.MergeMaybeObserver<T>
- java.lang.Object
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- java.lang.Number
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- java.util.concurrent.atomic.AtomicInteger
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- io.reactivex.rxjava3.internal.subscriptions.BasicIntQueueSubscription<T>
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- io.reactivex.rxjava3.internal.operators.maybe.MaybeMergeArray.MergeMaybeObserver<T>
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- All Implemented Interfaces:
MaybeObserver<T>
,QueueFuseable<T>
,QueueSubscription<T>
,SimpleQueue<T>
,java.io.Serializable
,org.reactivestreams.Subscription
- Enclosing class:
- MaybeMergeArray<T>
static final class MaybeMergeArray.MergeMaybeObserver<T> extends BasicIntQueueSubscription<T> implements MaybeObserver<T>
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Field Summary
Fields Modifier and Type Field Description (package private) boolean
cancelled
(package private) long
consumed
(package private) org.reactivestreams.Subscriber<? super T>
downstream
(package private) AtomicThrowable
errors
(package private) boolean
outputFused
(package private) MaybeMergeArray.SimpleQueueWithConsumerIndex<java.lang.Object>
queue
(package private) java.util.concurrent.atomic.AtomicLong
requested
private static long
serialVersionUID
(package private) CompositeDisposable
set
(package private) int
sourceCount
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Constructor Summary
Constructors Constructor Description MergeMaybeObserver(org.reactivestreams.Subscriber<? super T> actual, int sourceCount, MaybeMergeArray.SimpleQueueWithConsumerIndex<java.lang.Object> queue)
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description void
cancel()
void
clear()
Removes all enqueued items from this queue.(package private) void
drain()
(package private) void
drainFused()
(package private) void
drainNormal()
(package private) boolean
isCancelled()
boolean
isEmpty()
Returns true if the queue is empty.void
onComplete()
Called once the deferred computation completes normally.void
onError(java.lang.Throwable e)
Notifies theMaybeObserver
that theMaybe
has experienced an error condition.void
onSubscribe(Disposable d)
Provides theMaybeObserver
with the means of cancelling (disposing) the connection (channel) with theMaybe
in both synchronous (from withinonSubscribe(Disposable)
itself) and asynchronous manner.void
onSuccess(T value)
Notifies theMaybeObserver
with one item and that theMaybe
has finished sending push-based notifications.T
poll()
Tries to dequeue a value (non-null) or returns null if the queue is empty.void
request(long n)
int
requestFusion(int mode)
Request a fusion mode from the upstream.-
Methods inherited from class io.reactivex.rxjava3.internal.subscriptions.BasicIntQueueSubscription
offer, offer
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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
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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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downstream
final org.reactivestreams.Subscriber<? super T> downstream
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set
final CompositeDisposable set
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requested
final java.util.concurrent.atomic.AtomicLong requested
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queue
final MaybeMergeArray.SimpleQueueWithConsumerIndex<java.lang.Object> queue
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errors
final AtomicThrowable errors
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sourceCount
final int sourceCount
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cancelled
volatile boolean cancelled
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outputFused
boolean outputFused
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consumed
long consumed
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Constructor Detail
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MergeMaybeObserver
MergeMaybeObserver(org.reactivestreams.Subscriber<? super T> actual, int sourceCount, MaybeMergeArray.SimpleQueueWithConsumerIndex<java.lang.Object> queue)
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Method Detail
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requestFusion
public int requestFusion(int mode)
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 interfaceQueueFuseable<T>
- Parameters:
mode
- the requested fusion mode, allowed values areQueueFuseable.SYNC
,QueueFuseable.ASYNC
,QueueFuseable.ANY
combined withQueueFuseable.BOUNDARY
(e.g.,requestFusion(SYNC | BOUNDARY)
).- Returns:
- the established fusion mode:
QueueFuseable.NONE
,QueueFuseable.SYNC
,QueueFuseable.ASYNC
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poll
@Nullable public T poll()
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 interfaceSimpleQueue<T>
- Returns:
- the item or null to indicate an empty queue
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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 interfaceSimpleQueue<T>
- Returns:
- true if the queue is empty
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clear
public void clear()
Description copied from interface:SimpleQueue
Removes all enqueued items from this queue.- Specified by:
clear
in interfaceSimpleQueue<T>
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request
public void request(long n)
- Specified by:
request
in interfaceorg.reactivestreams.Subscription
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cancel
public void cancel()
- Specified by:
cancel
in interfaceorg.reactivestreams.Subscription
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onSubscribe
public void onSubscribe(Disposable d)
Description copied from interface:MaybeObserver
Provides theMaybeObserver
with the means of cancelling (disposing) the connection (channel) with theMaybe
in both synchronous (from withinonSubscribe(Disposable)
itself) and asynchronous manner.- Specified by:
onSubscribe
in interfaceMaybeObserver<T>
- Parameters:
d
- theDisposable
instance whoseDisposable.dispose()
can be called anytime to cancel the connection
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onSuccess
public void onSuccess(T value)
Description copied from interface:MaybeObserver
Notifies theMaybeObserver
with one item and that theMaybe
has finished sending push-based notifications.The
Maybe
will not call this method if it callsMaybeObserver.onError(java.lang.Throwable)
.- Specified by:
onSuccess
in interfaceMaybeObserver<T>
- Parameters:
value
- the item emitted by theMaybe
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onError
public void onError(java.lang.Throwable e)
Description copied from interface:MaybeObserver
Notifies theMaybeObserver
that theMaybe
has experienced an error condition.If the
Maybe
calls this method, it will not thereafter callMaybeObserver.onSuccess(T)
.- Specified by:
onError
in interfaceMaybeObserver<T>
- Parameters:
e
- the exception encountered by theMaybe
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onComplete
public void onComplete()
Description copied from interface:MaybeObserver
Called once the deferred computation completes normally.- Specified by:
onComplete
in interfaceMaybeObserver<T>
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isCancelled
boolean isCancelled()
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drainNormal
void drainNormal()
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drainFused
void drainFused()
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drain
void drain()
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