final class MergeSequence[T] extends GraphStage[UniformFanInShape[T, T]]
Takes multiple streams whose elements in aggregate have a defined linear sequence with difference 1, starting at 0, and outputs a single stream containing these elements, in order. That is, given a set of input streams with combined elements *ek*:
*e0*, *e1*, *e2*, ..., *en*
This will output a stream ordered by *k*.
The elements in the input streams must already be sorted according to the sequence. The input streams do not need to be linear, but the aggregate stream must be linear, no element *k* may be skipped or duplicated, either of these conditions will cause the stream to fail.
The typical use case for this is to merge a partitioned stream back
together while maintaining order. This can be achieved by first using
zipWithIndex on the input stream, then partitioning using a
Partition fanout, and then maintaining the index through the processing
of each partition before bringing together with this stage.
Emits when one of the upstreams has the next expected element in the sequence available.
Backpressures when downstream backpressures
Completes when all upstreams complete
Cancels when downstream cancels
- Source
- Graph.scala
- Alphabetic
- By Inheritance
- MergeSequence
- GraphStage
- GraphStageWithMaterializedValue
- Graph
- AnyRef
- Any
- by GraphMapMatVal
- by any2stringadd
- by StringFormat
- by Ensuring
- by ArrowAssoc
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- Public
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Type Members
-
type
Shape = UniformFanInShape[T, 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
- This member is added by an implicit conversion from MergeSequence[T] to any2stringadd[MergeSequence[T]] performed by method any2stringadd in scala.Predef.
- Definition Classes
- any2stringadd
-
def
->[B](y: B): (MergeSequence[T], B)
- Implicit
- This member is added by an implicit conversion from MergeSequence[T] to ArrowAssoc[MergeSequence[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[UniformFanInShape[T, T], NotUsed]
Add the given attributes to this Graph.
Add the given attributes to this Graph. If the specific attribute was already present on this graph this means the added attribute will be more specific than the existing one. If this Source is a composite of multiple graphs, new attributes on the composite will be less specific than attributes set directly on the individual graphs of the composite.
- Definition Classes
- Graph
-
final
def
asInstanceOf[T0]: T0
- Definition Classes
- Any
-
def
async(dispatcher: String, inputBufferSize: Int): Graph[UniformFanInShape[T, T], NotUsed]
Put an asynchronous boundary around this
GraphPut an asynchronous boundary around this
Graph- dispatcher
Run the graph on this dispatcher
- inputBufferSize
Set the input buffer to this size for the graph
- Definition Classes
- Graph
-
def
async(dispatcher: String): Graph[UniformFanInShape[T, T], NotUsed]
Put an asynchronous boundary around this
GraphPut an asynchronous boundary around this
Graph- dispatcher
Run the graph on this dispatcher
- Definition Classes
- Graph
-
def
async: Graph[UniformFanInShape[T, T], NotUsed]
Put an asynchronous boundary around this
GraphPut an asynchronous boundary around this
Graph- Definition Classes
- Graph
-
def
clone(): AnyRef
- Attributes
- protected[lang]
- Definition Classes
- AnyRef
- Annotations
- @throws( ... ) @native() @HotSpotIntrinsicCandidate()
-
def
createLogic(inheritedAttributes: Attributes): GraphStageLogic
- Definition Classes
- MergeSequence → GraphStage
-
final
def
createLogicAndMaterializedValue(inheritedAttributes: Attributes): (GraphStageLogic, NotUsed)
- Definition Classes
- GraphStage → GraphStageWithMaterializedValue
-
def
ensuring(cond: (MergeSequence[T]) ⇒ Boolean, msg: ⇒ Any): MergeSequence[T]
- Implicit
- This member is added by an implicit conversion from MergeSequence[T] to Ensuring[MergeSequence[T]] performed by method Ensuring in scala.Predef.
- Definition Classes
- Ensuring
-
def
ensuring(cond: (MergeSequence[T]) ⇒ Boolean): MergeSequence[T]
- Implicit
- This member is added by an implicit conversion from MergeSequence[T] to Ensuring[MergeSequence[T]] performed by method Ensuring in scala.Predef.
- Definition Classes
- Ensuring
-
def
ensuring(cond: Boolean, msg: ⇒ Any): MergeSequence[T]
- Implicit
- This member is added by an implicit conversion from MergeSequence[T] to Ensuring[MergeSequence[T]] performed by method Ensuring in scala.Predef.
- Definition Classes
- Ensuring
-
def
ensuring(cond: Boolean): MergeSequence[T]
- Implicit
- This member is added by an implicit conversion from MergeSequence[T] to Ensuring[MergeSequence[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
getAttributes: Attributes
- Definition Classes
- Graph
-
final
def
getClass(): Class[_]
- Definition Classes
- AnyRef → Any
- Annotations
- @native() @HotSpotIntrinsicCandidate()
-
def
hashCode(): Int
- Definition Classes
- AnyRef → Any
- Annotations
- @native() @HotSpotIntrinsicCandidate()
-
def
initialAttributes: Attributes
- Attributes
- protected
- Definition Classes
- GraphStageWithMaterializedValue
- val inputPorts: Int
-
final
def
isInstanceOf[T0]: Boolean
- Definition Classes
- Any
-
def
mapMaterializedValue[M2](f: (NotUsed) ⇒ M2): Graph[UniformFanInShape[T, T], M2]
Transform the materialized value of this Graph, leaving all other properties as they were.
Transform the materialized value of this Graph, leaving all other properties as they were.
- f
function to map the graph's materialized value
- Implicit
- This member is added by an implicit conversion from MergeSequence[T] to GraphMapMatVal[UniformFanInShape[T, T], NotUsed] performed by method GraphMapMatVal in org.apache.pekko.stream.Graph.
- Definition Classes
- GraphMapMatVal
-
def
named(name: String): Graph[UniformFanInShape[T, T], NotUsed]
Specifies the name of the Graph.
Specifies the name of the Graph. If the name is null or empty the name is ignored, i.e. Attributes.none is returned.
- Definition Classes
- Graph
-
final
def
ne(arg0: AnyRef): Boolean
- Definition Classes
- AnyRef
-
final
def
notify(): Unit
- Definition Classes
- AnyRef
- Annotations
- @native() @HotSpotIntrinsicCandidate()
-
final
def
notifyAll(): Unit
- Definition Classes
- AnyRef
- Annotations
- @native() @HotSpotIntrinsicCandidate()
-
val
shape: UniformFanInShape[T, 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
- MergeSequence → Graph
-
final
def
synchronized[T0](arg0: ⇒ T0): T0
- Definition Classes
- AnyRef
-
def
toString(): String
- Definition Classes
- MergeSequence → AnyRef → Any
-
final
def
wait(arg0: Long, arg1: Int): Unit
- Definition Classes
- AnyRef
- Annotations
- @throws( ... )
-
final
def
wait(arg0: Long): Unit
- Definition Classes
- AnyRef
- Annotations
- @throws( ... ) @native()
-
final
def
wait(): Unit
- Definition Classes
- AnyRef
- Annotations
- @throws( ... )
-
final
def
withAttributes(attr: Attributes): Graph[UniformFanInShape[T, T], NotUsed]
Replace the attributes of this Flow with the given ones.
Replace the attributes of this Flow with the given ones. If this Flow is a composite of multiple graphs, new attributes on the composite will be less specific than attributes set directly on the individual graphs of the composite.
- Definition Classes
- GraphStageWithMaterializedValue → Graph
-
def
→[B](y: B): (MergeSequence[T], B)
- Implicit
- This member is added by an implicit conversion from MergeSequence[T] to ArrowAssoc[MergeSequence[T]] performed by method ArrowAssoc in scala.Predef.
- Definition Classes
- ArrowAssoc
Deprecated Value Members
-
def
finalize(): Unit
- Attributes
- protected[lang]
- Definition Classes
- AnyRef
- Annotations
- @throws( classOf[java.lang.Throwable] ) @Deprecated
- Deprecated
-
def
formatted(fmtstr: String): String
- Implicit
- This member is added by an implicit conversion from MergeSequence[T] to StringFormat[MergeSequence[T]] performed by method StringFormat in scala.Predef.
- Definition Classes
- StringFormat
- Annotations
- @deprecated @inline()
- Deprecated
(Since version 2.12.16) Use
formatString.format(value)instead ofvalue.formatted(formatString), or use thef""string interpolator. In Java 15 and later,formattedresolves to the new method in String which has reversed parameters.