Class ObservableScalarXMap.ScalarDisposable<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.operators.observable.ObservableScalarXMap.ScalarDisposable<T>
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- Type Parameters:
T
- the value type
- All Implemented Interfaces:
Disposable
,QueueDisposable<T>
,QueueFuseable<T>
,SimpleQueue<T>
,java.io.Serializable
,java.lang.Runnable
- Enclosing class:
- ObservableScalarXMap
public static final class ObservableScalarXMap.ScalarDisposable<T> extends java.util.concurrent.atomic.AtomicInteger implements QueueDisposable<T>, java.lang.Runnable
Represents a Disposable that signals one onNext followed by an onComplete.- See Also:
- Serialized Form
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Field Summary
Fields Modifier and Type Field Description (package private) static int
FUSED
(package private) Observer<? super T>
observer
(package private) static int
ON_COMPLETE
(package private) static int
ON_NEXT
private static long
serialVersionUID
(package private) static int
START
(package private) T
value
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Constructor Summary
Constructors Constructor Description ScalarDisposable(Observer<? super T> observer, T value)
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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.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()
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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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value
final T value
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START
static final int START
- See Also:
- Constant Field Values
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FUSED
static final int FUSED
- See Also:
- Constant Field Values
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ON_NEXT
static final int ON_NEXT
- See Also:
- Constant Field Values
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ON_COMPLETE
static final int ON_COMPLETE
- See Also:
- Constant Field Values
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Method Detail
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offer
public boolean offer(T value)
Description copied from interface:SimpleQueue
Atomically enqueue a single value.- Specified by:
offer
in interfaceSimpleQueue<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)
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offer
public boolean offer(T v1, T v2)
Description copied from interface:SimpleQueue
Atomically enqueue two values.- Specified by:
offer
in interfaceSimpleQueue<T>
- Parameters:
v1
- the first value to enqueue, not nullv2
- 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)
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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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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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run
public void run()
- Specified by:
run
in interfacejava.lang.Runnable
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