Package rx.internal.producers

Class SingleDelayedProducer<T>

java.lang.Object

java.lang.Number

java.util.concurrent.atomic.AtomicInteger

rx.internal.producers.SingleDelayedProducer<T>

Type Parameters:

T - the value type

All Implemented Interfaces:

Serializable, Producer

public final class SingleDelayedProducer<T>
extends AtomicInteger
implements Producer

Producer that emits a single value and completes the child subscriber once that single value is set on it and the child requested items (maybe both asynchronously).

See Also:

• Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
(package private) final Subscriber<? super T>	child	The child to emit the value and completion once possible.
(package private) static final int	HAS_REQUEST_HAS_VALUE
(package private) static final int	HAS_REQUEST_NO_VALUE
(package private) static final int	NO_REQUEST_HAS_VALUE
(package private) static final int	NO_REQUEST_NO_VALUE
private static final long	serialVersionUID
(package private) T	value	The value to emit.

Constructor Summary

Constructors

Constructor	Description
SingleDelayedProducer(Subscriber<? super T> child)	Constructor, wraps the target child subscriber.

Method Summary

Modifier and Type	Method	Description
private static <T> void	emit(Subscriber<? super T> c, T v)	Emits the given value to the child subscriber and completes it and checks for unsubscriptions eagerly.
void	request(long n)	Request a certain maximum number of items from this Producer.
void	setValue(T value)

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

child

final Subscriber<? super T> child

The child to emit the value and completion once possible.

value

T value

The value to emit.

NO_REQUEST_NO_VALUE

static final int NO_REQUEST_NO_VALUE

See Also:

• Constant Field Values

NO_REQUEST_HAS_VALUE

static final int NO_REQUEST_HAS_VALUE

See Also:

• Constant Field Values

HAS_REQUEST_NO_VALUE

static final int HAS_REQUEST_NO_VALUE

See Also:

• Constant Field Values

HAS_REQUEST_HAS_VALUE

static final int HAS_REQUEST_HAS_VALUE

See Also:

• Constant Field Values

Constructor Details

SingleDelayedProducer

public SingleDelayedProducer(Subscriber<? super T> child)

Constructor, wraps the target child subscriber.

Parameters:

child - the child subscriber, not null

Method Details

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, pass Long.MAX_VALUE to this method.

Requests are additive but if a sequence of requests totals more than Long.MAX_VALUE then Long.MAX_VALUE requests will be actioned and the extras may be ignored. Arriving at Long.MAX_VALUE by addition of requests cannot be assumed to disable backpressure. For example, the code below may result in Long.MAX_VALUE requests being actioned only.

 request(100);
 request(Long.MAX_VALUE-1);
 

Specified by:

request in interface Producer

Parameters:

n - the maximum number of items you want this Producer to produce, or Long.MAX_VALUE if you want the Producer to produce items at its own pace

setValue

public void setValue(T value)

emit

private static <T> void emit(Subscriber<? super T> c,
 T v)

Emits the given value to the child subscriber and completes it and checks for unsubscriptions eagerly.

Parameters:

c -

v -