io.smallrye.mutiny.helpers.queues

Class DrainUtils

java.lang.Object

io.smallrye.mutiny.helpers.queues.DrainUtils

public class DrainUtils
extends Object

Copy from Project Reactor.

Field Summary

Fields

Modifier and Type	Field and Description
protected static long	COMPLETED_MASK Indicates the source completed and the value field is ready to be emitted.
protected static long	REQUESTED_MASK

Method Summary

Modifier and Type	Method and Description
static <T> void	postComplete(org.reactivestreams.Subscriber<? super T> downstream, Queue<T> queue, AtomicLong requested, BooleanSupplier isCancelled) Tries draining the queue if the source just completed.
static <T> boolean	postCompleteRequest(long n, org.reactivestreams.Subscriber<? super T> downstream, Queue<T> queue, AtomicLong requested, BooleanSupplier isCancelled) Perform a potential post-completion request accounting.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

COMPLETED_MASK

protected static final long COMPLETED_MASK

Indicates the source completed and the value field is ready to be emitted.

The AtomicLong (this) holds the requested amount in bits 0..62 so there is room for one signal bit. This also means the standard request accounting helper method doesn't work.

See Also:

Constant Field Values

REQUESTED_MASK

protected static final long REQUESTED_MASK

See Also:

Constant Field Values

Method Detail

postCompleteRequest

public static <T> boolean postCompleteRequest(long n,
                                              org.reactivestreams.Subscriber<? super T> downstream,
                                              Queue<T> queue,
                                              AtomicLong requested,
                                              BooleanSupplier isCancelled)

Perform a potential post-completion request accounting.

Type Parameters:

T - the output value type

Parameters:

n - the requested amount

downstream - the downstream consumer

queue - the queue holding the available values

requested - the requested atomic long

isCancelled - callback to detect cancellation

Returns:

true if the state indicates a completion state.

postComplete

public static <T> void postComplete(org.reactivestreams.Subscriber<? super T> downstream,
                                    Queue<T> queue,
                                    AtomicLong requested,
                                    BooleanSupplier isCancelled)

Tries draining the queue if the source just completed.

Type Parameters:

T - the output value type

Parameters:

downstream - the downstream consumer

queue - the queue holding available values

requested - the atomic long keeping track of requests

isCancelled - callback to detect cancellation