Package io.reactivex.rxjava3.processors
Class UnicastProcessor.UnicastQueueSubscription
- java.lang.Object
-
- java.lang.Number
-
- java.util.concurrent.atomic.AtomicInteger
-
- io.reactivex.rxjava3.internal.subscriptions.BasicIntQueueSubscription<T>
-
- io.reactivex.rxjava3.processors.UnicastProcessor.UnicastQueueSubscription
-
- All Implemented Interfaces:
QueueFuseable<T>
,QueueSubscription<T>
,SimpleQueue<T>
,java.io.Serializable
,org.reactivestreams.Subscription
- Enclosing class:
- UnicastProcessor<T>
final class UnicastProcessor.UnicastQueueSubscription extends BasicIntQueueSubscription<T>
-
-
Field Summary
Fields Modifier and Type Field Description private static long
serialVersionUID
-
Constructor Summary
Constructors Constructor Description UnicastQueueSubscription()
-
Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description void
cancel()
void
clear()
Removes all enqueued items from this queue.boolean
isEmpty()
Returns true if the queue is empty.T
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
-
-
-
-
Field Detail
-
serialVersionUID
private static final long serialVersionUID
- See Also:
- Constant Field Values
-
-
Method Detail
-
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.- Returns:
- the item or null to indicate an empty queue
-
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).- Returns:
- true if the queue is empty
-
clear
public void clear()
Description copied from interface:SimpleQueue
Removes all enqueued items from this queue.
-
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.- Parameters:
requestedMode
- 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
.
-
request
public void request(long n)
-
cancel
public void cancel()
-
-