Class FlowableFromStream.AbstractStreamSubscription<T>
- java.lang.Object
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- java.lang.Number
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- java.util.concurrent.atomic.AtomicLong
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- io.reactivex.rxjava3.internal.jdk8.FlowableFromStream.AbstractStreamSubscription<T>
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- All Implemented Interfaces:
QueueFuseable<T>
,QueueSubscription<T>
,SimpleQueue<T>
,java.io.Serializable
,org.reactivestreams.Subscription
- Direct Known Subclasses:
FlowableFromStream.StreamConditionalSubscription
,FlowableFromStream.StreamSubscription
- Enclosing class:
- FlowableFromStream<T>
abstract static class FlowableFromStream.AbstractStreamSubscription<T> extends java.util.concurrent.atomic.AtomicLong implements QueueSubscription<T>
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Constructor Summary
Constructors Constructor Description AbstractStreamSubscription(java.util.Iterator<T> iterator, java.lang.AutoCloseable closeable)
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Method Summary
All Methods Instance Methods Abstract 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.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.void
request(long n)
int
requestFusion(int mode)
Request a fusion mode from the upstream.(package private) abstract void
run(long n)
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Methods inherited from class java.util.concurrent.atomic.AtomicLong
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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iterator
java.util.Iterator<T> iterator
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closeable
java.lang.AutoCloseable closeable
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cancelled
volatile boolean cancelled
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once
boolean once
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Constructor Detail
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AbstractStreamSubscription
AbstractStreamSubscription(java.util.Iterator<T> iterator, java.lang.AutoCloseable closeable)
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Method Detail
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request
public void request(long n)
- Specified by:
request
in interfaceorg.reactivestreams.Subscription
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run
abstract void run(long n)
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cancel
public void cancel()
- Specified by:
cancel
in interfaceorg.reactivestreams.Subscription
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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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offer
public boolean offer(@NonNull 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(@NonNull T v1, @NonNull 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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