Package rx.internal.producers
Class QueuedValueProducer<T>
java.lang.Object
java.lang.Number
java.util.concurrent.atomic.AtomicLong
rx.internal.producers.QueuedValueProducer<T>
- Type Parameters:
T
- the value type
- All Implemented Interfaces:
Serializable
,Producer
Producer that holds an unbounded (or custom) queue to enqueue values and relays them
to a child subscriber on request.
- See Also:
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Field Summary
FieldsModifier and TypeFieldDescription(package private) final Subscriber
<? super T> (package private) static final Object
private static final long
(package private) final AtomicInteger
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Constructor Summary
ConstructorsConstructorDescriptionQueuedValueProducer
(Subscriber<? super T> child) Constructs an instance with the target child subscriber and an Spsc Linked (Atomic) Queue as the queue implementation.QueuedValueProducer
(Subscriber<? super T> child, Queue<Object> queue) Constructs an instance with the target child subscriber and a custom queue implementation -
Method Summary
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
Methods inherited from class java.lang.Number
byteValue, shortValue
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Field Details
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serialVersionUID
private static final long serialVersionUID- See Also:
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child
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queue
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wip
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NULL_SENTINEL
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Constructor Details
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QueuedValueProducer
Constructs an instance with the target child subscriber and an Spsc Linked (Atomic) Queue as the queue implementation.- Parameters:
child
- the target child subscriber
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QueuedValueProducer
Constructs an instance with the target child subscriber and a custom queue implementation- Parameters:
child
- the target child subscriberqueue
- the queue to use
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Method Details
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request
public void request(long n) Description copied from interface:Producer
Request a certain maximum number of items from this Producer. This is a way of requesting backpressure. To disable backpressure, passLong.MAX_VALUE
to this method.Requests are additive but if a sequence of requests totals more than
Long.MAX_VALUE
thenLong.MAX_VALUE
requests will be actioned and the extras may be ignored. Arriving atLong.MAX_VALUE
by addition of requests cannot be assumed to disable backpressure. For example, the code below may result inLong.MAX_VALUE
requests being actioned only.request(100); request(Long.MAX_VALUE-1);
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offer
Offers a value to this producer and tries to emit any queued values if the child requests allow it.- Parameters:
value
- the value to enqueue and attempt to drain- Returns:
- true if the queue accepted the offer, false otherwise
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drain
private void drain()
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