Package io.reactivex.rxjava3.internal.operators.observable

Class ObservableScalarXMap.ScalarDisposable<T>

java.lang.Object

java.lang.Number

java.util.concurrent.atomic.AtomicInteger

io.reactivex.rxjava3.internal.operators.observable.ObservableScalarXMap.ScalarDisposable<T>

Type Parameters:

T - the value type

All Implemented Interfaces:

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

Enclosing class:

ObservableScalarXMap

public static final class ObservableScalarXMap.ScalarDisposable<T>
extends AtomicInteger
implements QueueDisposable<T>, Runnable

Represents a Disposable that signals one onNext followed by an onComplete.

See Also:

• Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
(package private) static final int	FUSED
(package private) final Observer<? super T>	observer
(package private) static final int	ON_COMPLETE
(package private) static final int	ON_NEXT
private static final long	serialVersionUID
(package private) static final int	START
(package private) final T	value

Fields inherited from interface io.reactivex.rxjava3.operators.QueueFuseable

ANY, ASYNC, BOUNDARY, NONE, SYNC

Constructor Summary

Constructors

Constructor	Description
ScalarDisposable(Observer<? super T> observer, T value)

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.
boolean	offer(T value)	Atomically enqueue a single value.
boolean	offer(T v1, T v2)	Atomically enqueue two values.
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.
void	run()

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

observer

final Observer<? super T> observer

value

final T value

START

static final int START

See Also:

• Constant Field Values

FUSED

static final int FUSED

See Also:

• Constant Field Values

ON_NEXT

static final int ON_NEXT

See Also:

• Constant Field Values

ON_COMPLETE

static final int ON_COMPLETE

See Also:

• Constant Field Values

Constructor Details

ScalarDisposable

public ScalarDisposable(Observer<? super T> observer,
 T value)

Method Details

offer

public boolean offer(T value)

Description copied from interface: SimpleQueue

Atomically enqueue a single value.

Specified by:

offer in interface SimpleQueue<T>

Parameters:

value - the value to enqueue, not null

Returns:

true if successful, false if the value was not enqueued likely due to reaching the queue capacity)

offer

public boolean offer(T v1,
 T v2)

Description copied from interface: SimpleQueue

Atomically enqueue two values.

Specified by:

offer in interface SimpleQueue<T>

Parameters:

v1 - the first value to enqueue, not null

v2 - the second value to enqueue, not null

Returns:

true if successful, false if the value was not enqueued likely due to reaching the queue capacity)

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 interface SimpleQueue<T>

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).

Specified by:

isEmpty in interface SimpleQueue<T>

Returns:

true if the queue is empty

clear

public void clear()

Description copied from interface: SimpleQueue

Removes all enqueued items from this queue.

Specified by:

clear in interface SimpleQueue<T>

dispose

public void dispose()

Description copied from interface: Disposable

Dispose the resource, the operation should be idempotent.

Specified by:

dispose in interface Disposable

isDisposed

public boolean isDisposed()

Description copied from interface: Disposable

Returns true if this resource has been disposed.

Specified by:

isDisposed in interface Disposable

Returns:

true if this resource has been disposed

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 interface QueueFuseable<T>

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.

run

public void run()

Specified by:

run in interface Runnable