final class HeadOptionStage[T] extends GraphStageWithMaterializedValue[SinkShape[T], Future[Option[T]]]
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- new HeadOptionStage()
Type Members
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final
def
!=(arg0: Any): Boolean
- Definition Classes
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final
def
##(): Int
- Definition Classes
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def
+(other: String): String
- Implicit
- This member is added by an implicit conversion from HeadOptionStage[T] to any2stringadd[HeadOptionStage[T]] performed by method any2stringadd in scala.Predef.
- Definition Classes
- any2stringadd
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def
->[B](y: B): (HeadOptionStage[T], B)
- Implicit
- This member is added by an implicit conversion from HeadOptionStage[T] to ArrowAssoc[HeadOptionStage[T]] performed by method ArrowAssoc in scala.Predef.
- Definition Classes
- ArrowAssoc
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- @inline()
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final
def
==(arg0: Any): Boolean
- Definition Classes
- AnyRef → Any
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def
addAttributes(attr: Attributes): Graph[SinkShape[T], Future[Option[T]]]
- Definition Classes
- Graph
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final
def
asInstanceOf[T0]: T0
- Definition Classes
- Any
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def
async: Graph[SinkShape[T], Future[Option[T]]]
Put an asynchronous boundary around this
Graph
Put an asynchronous boundary around this
Graph
- Definition Classes
- Graph
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def
clone(): AnyRef
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- protected[java.lang]
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- @throws( ... )
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def
createLogicAndMaterializedValue(inheritedAttributes: Attributes): (GraphStageLogic with InHandler, Future[Option[T]])
- Definition Classes
- HeadOptionStage → GraphStageWithMaterializedValue
-
def
ensuring(cond: (HeadOptionStage[T]) ⇒ Boolean, msg: ⇒ Any): HeadOptionStage[T]
- Implicit
- This member is added by an implicit conversion from HeadOptionStage[T] to Ensuring[HeadOptionStage[T]] performed by method Ensuring in scala.Predef.
- Definition Classes
- Ensuring
-
def
ensuring(cond: (HeadOptionStage[T]) ⇒ Boolean): HeadOptionStage[T]
- Implicit
- This member is added by an implicit conversion from HeadOptionStage[T] to Ensuring[HeadOptionStage[T]] performed by method Ensuring in scala.Predef.
- Definition Classes
- Ensuring
-
def
ensuring(cond: Boolean, msg: ⇒ Any): HeadOptionStage[T]
- Implicit
- This member is added by an implicit conversion from HeadOptionStage[T] to Ensuring[HeadOptionStage[T]] performed by method Ensuring in scala.Predef.
- Definition Classes
- Ensuring
-
def
ensuring(cond: Boolean): HeadOptionStage[T]
- Implicit
- This member is added by an implicit conversion from HeadOptionStage[T] to Ensuring[HeadOptionStage[T]] performed by method Ensuring in scala.Predef.
- Definition Classes
- Ensuring
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final
def
eq(arg0: AnyRef): Boolean
- Definition Classes
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def
equals(arg0: Any): Boolean
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def
finalize(): Unit
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- @throws( classOf[java.lang.Throwable] )
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def
formatted(fmtstr: String): String
- Implicit
- This member is added by an implicit conversion from HeadOptionStage[T] to StringFormat[HeadOptionStage[T]] performed by method StringFormat in scala.Predef.
- Definition Classes
- StringFormat
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- @inline()
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final
def
getClass(): Class[_]
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def
hashCode(): Int
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- val in: Inlet[T]
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def
initialAttributes: Attributes
- Attributes
- protected
- Definition Classes
- GraphStageWithMaterializedValue
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final
def
isInstanceOf[T0]: Boolean
- Definition Classes
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final
lazy val
module: Module
INTERNAL API.
INTERNAL API.
Every materializable element must be backed by a stream layout module
- Definition Classes
- GraphStageWithMaterializedValue → Graph
-
def
named(name: String): Graph[SinkShape[T], Future[Option[T]]]
- Definition Classes
- Graph
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final
def
ne(arg0: AnyRef): Boolean
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final
def
notify(): Unit
- Definition Classes
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final
def
notifyAll(): Unit
- Definition Classes
- AnyRef
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val
shape: SinkShape[T]
- Definition Classes
- HeadOptionStage → Graph
-
final
def
synchronized[T0](arg0: ⇒ T0): T0
- Definition Classes
- AnyRef
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def
toString(): String
- Definition Classes
- HeadOptionStage → AnyRef → Any
-
final
def
wait(): Unit
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- @throws( ... )
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final
def
wait(arg0: Long, arg1: Int): Unit
- Definition Classes
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- Annotations
- @throws( ... )
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final
def
wait(arg0: Long): Unit
- Definition Classes
- AnyRef
- Annotations
- @throws( ... )
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final
def
withAttributes(attr: Attributes): Graph[SinkShape[T], Future[Option[T]]]
- Definition Classes
- GraphStageWithMaterializedValue → Graph
-
def
→[B](y: B): (HeadOptionStage[T], B)
- Implicit
- This member is added by an implicit conversion from HeadOptionStage[T] to ArrowAssoc[HeadOptionStage[T]] performed by method ArrowAssoc in scala.Predef.
- Definition Classes
- ArrowAssoc