MergePreferred

Merge several streams, taking elements as they arrive from input streams (picking from preferred when several have elements ready).

A MergePreferred has one out port, one preferred input port and 1 or more secondary in ports.

Emits when one of the inputs has an element available, preferring a specified input if multiple have elements available

Backpressures when downstream backpressures

Completes when all upstreams complete (eagerComplete=false) or one upstream completes (eagerComplete=true), default value is false

Cancels when downstream cancels

Source: Graph.scala

Linear Supertypes

GraphStage[MergePreferredShape[T]], GraphStageWithMaterializedValue[MergePreferredShape[T], NotUsed], Graph[MergePreferredShape[T], NotUsed], AnyRef, Any

Type Hierarchy

Instance Constructors

new MergePreferred(secondaryPorts: Int, eagerComplete: Boolean)

Type Members

type Shape = MergePreferredShape[T]

Type-level accessor for the shape parameter of this graph.
Type-level accessor for the shape parameter of this graph.

Definition Classes
Graph

Value Members

final def !=(arg0: Any): Boolean

Definition Classes
AnyRef → Any
final def ##(): Int

Definition Classes
AnyRef → Any
def +(other: String): String

Implicit information
This member is added by an implicit conversion from MergePreferred[T] to any2stringadd[MergePreferred[T]] performed by method any2stringadd in scala.Predef.
Definition Classes
any2stringadd
def ->[B](y: B): (MergePreferred[T], B)

Implicit information
This member is added by an implicit conversion from MergePreferred[T] to ArrowAssoc[MergePreferred[T]] performed by method ArrowAssoc in scala.Predef.
Definition Classes
ArrowAssoc
Annotations
@inline()
final def ==(arg0: Any): Boolean

Definition Classes
AnyRef → Any
def addAttributes(attr: Attributes): Graph[MergePreferredShape[T], NotUsed]

Definition Classes
Graph
final def asInstanceOf[T0]: T0

Definition Classes
Any
def async: Graph[MergePreferredShape[T], NotUsed]

Put an asynchronous boundary around this Graph
Put an asynchronous boundary around this Graph

Definition Classes
Graph
def clone(): AnyRef

Attributes
protected[java.lang]
Definition Classes
AnyRef
Annotations
@HotSpotIntrinsicCandidate() @throws( ... )
def createLogic(inheritedAttributes: Attributes): GraphStageLogic

Definition Classes
MergePreferred → GraphStage
final def createLogicAndMaterializedValue(inheritedAttributes: Attributes): (GraphStageLogic, NotUsed)

Definition Classes
GraphStage → GraphStageWithMaterializedValue
val eagerComplete: Boolean
def ensuring(cond: (MergePreferred[T]) ⇒ Boolean, msg: ⇒ Any): MergePreferred[T]

Implicit information
This member is added by an implicit conversion from MergePreferred[T] to Ensuring[MergePreferred[T]] performed by method Ensuring in scala.Predef.
Definition Classes
Ensuring
def ensuring(cond: (MergePreferred[T]) ⇒ Boolean): MergePreferred[T]

Implicit information
This member is added by an implicit conversion from MergePreferred[T] to Ensuring[MergePreferred[T]] performed by method Ensuring in scala.Predef.
Definition Classes
Ensuring
def ensuring(cond: Boolean, msg: ⇒ Any): MergePreferred[T]

Implicit information
This member is added by an implicit conversion from MergePreferred[T] to Ensuring[MergePreferred[T]] performed by method Ensuring in scala.Predef.
Definition Classes
Ensuring
def ensuring(cond: Boolean): MergePreferred[T]

Implicit information
This member is added by an implicit conversion from MergePreferred[T] to Ensuring[MergePreferred[T]] performed by method Ensuring in scala.Predef.
Definition Classes
Ensuring
final def eq(arg0: AnyRef): Boolean

Definition Classes
AnyRef
def equals(arg0: Any): Boolean

Definition Classes
AnyRef → Any
def formatted(fmtstr: String): String

Implicit information
This member is added by an implicit conversion from MergePreferred[T] to StringFormat[MergePreferred[T]] performed by method StringFormat in scala.Predef.
Definition Classes
StringFormat
Annotations
@inline()
final def getClass(): Class[_]

Definition Classes
AnyRef → Any
Annotations
@HotSpotIntrinsicCandidate()
def hashCode(): Int

Definition Classes
AnyRef → Any
Annotations
@HotSpotIntrinsicCandidate()
def in(id: Int): Inlet[T]
def initialAttributes: Attributes

Definition Classes
MergePreferred → GraphStageWithMaterializedValue
final def isInstanceOf[T0]: Boolean

Definition Classes
Any
def named(name: String): Graph[MergePreferredShape[T], NotUsed]

Definition Classes
Graph
final def ne(arg0: AnyRef): Boolean

Definition Classes
AnyRef
final def notify(): Unit

Definition Classes
AnyRef
Annotations
@HotSpotIntrinsicCandidate()
final def notifyAll(): Unit

Definition Classes
AnyRef
Annotations
@HotSpotIntrinsicCandidate()
def out: Outlet[T]
def preferred: Inlet[T]
val secondaryPorts: Int
val shape: MergePreferredShape[T]

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

Definition Classes
MergePreferred → Graph
final def synchronized[T0](arg0: ⇒ T0): T0

Definition Classes
AnyRef
def toString(): String

Definition Classes
AnyRef → Any
final def wait(): Unit

Definition Classes
AnyRef
Annotations
@throws( ... )
final def wait(arg0: Long, arg1: Int): Unit

Definition Classes
AnyRef
Annotations
@throws( ... )
final def wait(arg0: Long): Unit

Definition Classes
AnyRef
Annotations
@throws( ... )
final def withAttributes(attr: Attributes): Graph[MergePreferredShape[T], NotUsed]

Definition Classes
GraphStageWithMaterializedValue → Graph
def →[B](y: B): (MergePreferred[T], B)

Implicit information
This member is added by an implicit conversion from MergePreferred[T] to ArrowAssoc[MergePreferred[T]] performed by method ArrowAssoc in scala.Predef.
Definition Classes
ArrowAssoc

Deprecated Value Members

def finalize(): Unit

Attributes
protected[java.lang]
Definition Classes
AnyRef
Annotations
@Deprecated @deprecated @throws( classOf[java.lang.Throwable] )
Deprecated
(Since version ) see corresponding Javadoc for more information.

Related Docs: object MergePreferred | package scaladsl

final class MergePreferred[T] extends GraphStage[MergePreferredShape[T]]

Instance Constructors

new MergePreferred(secondaryPorts: Int, eagerComplete: Boolean)

Type Members

type Shape = MergePreferredShape[T]

Value Members

final def !=(arg0: Any): Boolean

final def ##(): Int

def +(other: String): String

def ->[B](y: B): (MergePreferred[T], B)

final def ==(arg0: Any): Boolean

def addAttributes(attr: Attributes): Graph[MergePreferredShape[T], NotUsed]

final def asInstanceOf[T0]: T0

def async: Graph[MergePreferredShape[T], NotUsed]

def clone(): AnyRef

def createLogic(inheritedAttributes: Attributes): GraphStageLogic

final def createLogicAndMaterializedValue(inheritedAttributes: Attributes): (GraphStageLogic, NotUsed)

val eagerComplete: Boolean

def ensuring(cond: (MergePreferred[T]) ⇒ Boolean, msg: ⇒ Any): MergePreferred[T]

def ensuring(cond: (MergePreferred[T]) ⇒ Boolean): MergePreferred[T]

def ensuring(cond: Boolean, msg: ⇒ Any): MergePreferred[T]

def ensuring(cond: Boolean): MergePreferred[T]

final def eq(arg0: AnyRef): Boolean

def equals(arg0: Any): Boolean

def formatted(fmtstr: String): String

final def getClass(): Class[_]

def hashCode(): Int

def in(id: Int): Inlet[T]

def initialAttributes: Attributes

final def isInstanceOf[T0]: Boolean

def named(name: String): Graph[MergePreferredShape[T], NotUsed]

final def ne(arg0: AnyRef): Boolean

final def notify(): Unit

final def notifyAll(): Unit

def out: Outlet[T]

def preferred: Inlet[T]

val secondaryPorts: Int

val shape: MergePreferredShape[T]

final def synchronized[T0](arg0: ⇒ T0): T0

def toString(): String

final def wait(): Unit

final def wait(arg0: Long, arg1: Int): Unit

final def wait(arg0: Long): Unit

final def withAttributes(attr: Attributes): Graph[MergePreferredShape[T], NotUsed]

def →[B](y: B): (MergePreferred[T], B)

Deprecated Value Members

def finalize(): Unit

Inherited from GraphStage[MergePreferredShape[T]]

Inherited from GraphStageWithMaterializedValue[MergePreferredShape[T], NotUsed]

Inherited from Graph[MergePreferredShape[T], NotUsed]

Inherited from AnyRef

Inherited from Any

Inherited by implicit conversion any2stringadd from MergePreferred[T] to any2stringadd[MergePreferred[T]]

Inherited by implicit conversion StringFormat from MergePreferred[T] to StringFormat[MergePreferred[T]]

Inherited by implicit conversion Ensuring from MergePreferred[T] to Ensuring[MergePreferred[T]]

Inherited by implicit conversion ArrowAssoc from MergePreferred[T] to ArrowAssoc[MergePreferred[T]]

Ungrouped