Package akka.stream.impl

Class HeadOptionStage<T>

java.lang.Object

akka.stream.stage.GraphStageWithMaterializedValue<SinkShape<T>,scala.concurrent.Future<scala.Option<T>>>

akka.stream.impl.HeadOptionStage<T>

All Implemented Interfaces:

Graph<SinkShape<T>,scala.concurrent.Future<scala.Option<T>>>

public final class HeadOptionStage<T>
extends GraphStageWithMaterializedValue<SinkShape<T>,scala.concurrent.Future<scala.Option<T>>>

INTERNAL API

Nested Class Summary

Nested classes/interfaces inherited from interface akka.stream.Graph

Graph.GraphMapMatVal<S extends Shape,M>

Constructor Summary

Constructors

Constructor	Description
HeadOptionStage()

Method Summary

Modifier and Type	Method	Description
scala.Tuple2<GraphStageLogic,scala.concurrent.Future<scala.Option<T>>>	createLogicAndMaterializedValue(Attributes inheritedAttributes)
Inlet<T>	in()
SinkShape<T>	shape()	The shape of a graph is all that is externally visible: its inlets and outlets.
java.lang.String	toString()

Methods inherited from class akka.stream.stage.GraphStageWithMaterializedValue

createLogicAndMaterializedValue, initialAttributes, traversalBuilder, withAttributes

Methods inherited from class java.lang.Object

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

Methods inherited from interface akka.stream.Graph

addAttributes, async, async, async, named

Constructor Detail

HeadOptionStage

public HeadOptionStage()

Method Detail

createLogicAndMaterializedValue

public scala.Tuple2<GraphStageLogic,scala.concurrent.Future<scala.Option<T>>> createLogicAndMaterializedValue(Attributes inheritedAttributes)

Specified by:

createLogicAndMaterializedValue in class GraphStageWithMaterializedValue<SinkShape<T>,scala.concurrent.Future<scala.Option<T>>>

in

public Inlet<T> in()

shape

public SinkShape<T> shape()

Description copied from interface: Graph

The shape of a graph is all that is externally visible: its inlets and outlets.

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object