Class SingleFlatMapIterableObservable.FlatMapIterableObserver<T,R>
- 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.observers.BasicIntQueueDisposable<R>
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- io.reactivex.rxjava3.internal.operators.single.SingleFlatMapIterableObservable.FlatMapIterableObserver<T,R>
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- All Implemented Interfaces:
SingleObserver<T>
,Disposable
,QueueDisposable<R>
,QueueFuseable<R>
,SimpleQueue<R>
,java.io.Serializable
- Enclosing class:
- SingleFlatMapIterableObservable<T,R>
static final class SingleFlatMapIterableObservable.FlatMapIterableObserver<T,R> extends BasicIntQueueDisposable<R> implements SingleObserver<T>
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Field Summary
Fields Modifier and Type Field Description (package private) boolean
cancelled
(package private) Observer<? super R>
downstream
(package private) java.util.Iterator<? extends R>
it
(package private) Function<? super T,? extends java.lang.Iterable<? extends R>>
mapper
(package private) boolean
outputFused
private static long
serialVersionUID
(package private) Disposable
upstream
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description void
clear()
Removes all enqueued items from this queue.void
dispose()
Dispose the resource, the operation should be idempotent.boolean
isDisposed()
Returns true if this resource has been disposed.boolean
isEmpty()
Returns true if the queue is empty.void
onError(java.lang.Throwable e)
Notifies theSingleObserver
that theSingle
has experienced an error condition.void
onSubscribe(Disposable d)
Provides theSingleObserver
with the means of cancelling (disposing) the connection (channel) with the Single in both synchronous (from withinonSubscribe(Disposable)
itself) and asynchronous manner.void
onSuccess(T value)
Notifies theSingleObserver
with a single item and that theSingle
has finished sending push-based notifications.R
poll()
Tries to dequeue a value (non-null) or returns null if the queue is empty.int
requestFusion(int mode)
Request a fusion mode from the upstream.-
Methods inherited from class io.reactivex.rxjava3.internal.observers.BasicIntQueueDisposable
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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upstream
Disposable upstream
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it
volatile java.util.Iterator<? extends R> it
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cancelled
volatile boolean cancelled
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outputFused
boolean outputFused
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Method Detail
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onSubscribe
public void onSubscribe(Disposable d)
Description copied from interface:SingleObserver
Provides theSingleObserver
with the means of cancelling (disposing) the connection (channel) with the Single in both synchronous (from withinonSubscribe(Disposable)
itself) and asynchronous manner.- Specified by:
onSubscribe
in interfaceSingleObserver<T>
- Parameters:
d
- the Disposable 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:SingleObserver
Notifies theSingleObserver
with a single item and that theSingle
has finished sending push-based notifications.The
Single
will not call this method if it callsSingleObserver.onError(java.lang.Throwable)
.- Specified by:
onSuccess
in interfaceSingleObserver<T>
- Parameters:
value
- the item emitted by theSingle
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onError
public void onError(java.lang.Throwable e)
Description copied from interface:SingleObserver
Notifies theSingleObserver
that theSingle
has experienced an error condition.If the
Single
calls this method, it will not thereafter callSingleObserver.onSuccess(T)
.- Specified by:
onError
in interfaceSingleObserver<T>
- Parameters:
e
- the exception encountered by theSingle
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dispose
public void dispose()
Description copied from interface:Disposable
Dispose the resource, the operation should be idempotent.- Specified by:
dispose
in interfaceDisposable
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isDisposed
public boolean isDisposed()
Description copied from interface:Disposable
Returns true if this resource has been disposed.- Specified by:
isDisposed
in interfaceDisposable
- Returns:
- true if this resource has been disposed
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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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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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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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poll
@Nullable public R 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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