Class UnicastSubject.UnicastQueueDisposable

java.lang.Object

java.lang.Number

java.util.concurrent.atomic.AtomicInteger

io.reactivex.rxjava3.internal.observers.BasicIntQueueDisposable<T>

io.reactivex.rxjava3.subjects.UnicastSubject.UnicastQueueDisposable

All Implemented Interfaces:

Disposable, QueueDisposable<T>, QueueFuseable<T>, SimpleQueue<T>, Serializable

Enclosing class:

UnicastSubject<T>

final class UnicastSubject.UnicastQueueDisposable
extends BasicIntQueueDisposable<T>

Since:

2.0

Field Summary

Fields

Modifier and Type	Field	Description
private static final long	serialVersionUID

Fields inherited from interface QueueFuseable

ANY, ASYNC, BOUNDARY, NONE, SYNC

Constructor Summary

Constructors

Constructor	Description
UnicastQueueDisposable()

Method Summary

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.
T	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 BasicIntQueueDisposable

offer, offer

Methods inherited from class 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 Number

byteValue, shortValue

Methods inherited from class Object

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

Field Details

serialVersionUID

private static final long serialVersionUID

See Also:

• Constant Field Values

Constructor Details

UnicastQueueDisposable

UnicastQueueDisposable()

Method Details

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.

Parameters:

mode - 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.

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.

dispose

public void dispose()

Description copied from interface: Disposable

Dispose the resource, the operation should be idempotent.

isDisposed

public boolean isDisposed()

Description copied from interface: Disposable

Returns true if this resource has been disposed.

Returns:

true if this resource has been disposed