Flink : Scala 1.20-SNAPSHOT API < Back

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package root

Definition Classes
root
package org

Definition Classes
root
package apache

Definition Classes
org
package flink

Definition Classes
apache
package api

Definition Classes
flink
package scala
The Flink Scala API.
The Flink Scala API. org.apache.flink.api.scala.ExecutionEnvironment is the starting-point of any Flink program. It can be used to read from local files, HDFS, or other sources. org.apache.flink.api.scala.DataSet is the main abstraction of data in Flink. It provides operations that create new DataSets via transformations. org.apache.flink.api.scala.GroupedDataSet provides operations on grouped data that results from org.apache.flink.api.scala.DataSet.groupBy().
Use org.apache.flink.api.scala.ExecutionEnvironment.getExecutionEnvironment to obtain an execution environment. This will either create a local environment or a remote environment, depending on the context where your program is executing.

Definition Classes
api
Deprecated
All Flink Scala APIs are deprecated and will be removed in a future Flink version. You can still build your application in Scala, but you should move to the Java version of either the DataStream and/or Table API.
See also
FLIP-265 Deprecate and remove Scala API support
package extensions
acceptPartialFunctions extends the original DataSet with methods with unique names that delegate to core higher-order functions (e.g.
acceptPartialFunctions extends the original DataSet with methods with unique names that delegate to core higher-order functions (e.g. map) so that we can work around the fact that overloaded methods taking functions as parameters can't accept partial functions as well. This enables the possibility to directly apply pattern matching to decompose inputs such as tuples, case classes and collections.
The following is a small example that showcases how this extensions would work on a Flink data set:
```
object Main {
  import org.apache.flink.api.scala.extensions._
  case class Point(x: Double, y: Double)
  def main(args: Array[String]): Unit = {
    val env = ExecutionEnvironment.getExecutionEnvironment
    val ds = env.fromElements(Point(1, 2), Point(3, 4), Point(5, 6))
    ds.filterWith {
      case Point(x, _) => x > 1
    }.reduceWith {
      case (Point(x1, y1), (Point(x2, y2))) => Point(x1 + y1, x2 + y2)
    }.mapWith {
      case Point(x, y) => (x, y)
    }.flatMapWith {
      case (x, y) => Seq('x' -> x, 'y' -> y)
    }.groupingBy {
      case (id, value) => id
    }
  }
}
```
The extension consists of several implicit conversions over all the data set representations that could gain from this feature. To use this set of extensions methods the user has to explicitly opt-in by importing org.apache.flink.api.scala.extensions.acceptPartialFunctions.
For more information and usage examples please consult the Apache Flink official documentation.
Definition Classes
scala
Deprecated
All Flink Scala APIs are deprecated and will be removed in a future Flink major version. You can still build your application in Scala, but you should move to the Java version of either the DataStream and/or Table API.
See also
FLIP-265 Deprecate and remove Scala API support
package metrics

Definition Classes
scala
package operators

Definition Classes
scala
package typeutils

Definition Classes
scala
package utils

Definition Classes
scala
AggregateDataSet
ClosureCleaner
CoGroupDataSet
CrossDataSet
DataSet
ExecutionEnvironment
GroupedDataSet
JoinDataSet
JoinFunctionAssigner
PartitionSortedDataSet
SelectByMaxFunction
SelectByMinFunction
Tuple2CaseClassSerializer
UnfinishedCoGroupOperation
UnfinishedJoinOperation
UnfinishedOuterJoinOperation

org.apache.flink.api.scala

Tuple2CaseClassSerializer

class Tuple2CaseClassSerializer[T1, T2] extends ScalaCaseClassSerializer[(T1, T2)]

Linear Supertypes

ScalaCaseClassSerializer[(T1, T2)], CaseClassSerializer[(T1, T2)], Cloneable, Cloneable, TupleSerializerBase[(T1, T2)], TypeSerializer[(T1, T2)], Serializable, AnyRef, Any

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Inherited

Tuple2CaseClassSerializer
ScalaCaseClassSerializer
CaseClassSerializer
Cloneable
Cloneable
TupleSerializerBase
TypeSerializer
Serializable
AnyRef
Any

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Visibility

Public
All

Instance Constructors

new Tuple2CaseClassSerializer(clazz: Class[(T1, T2)], fieldSerializers: Array[TypeSerializer[_]])

Value Members

final def !=(arg0: Any): Boolean

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

Definition Classes
AnyRef → Any
final def ==(arg0: Any): Boolean

Definition Classes
AnyRef → Any
final def asInstanceOf[T0]: T0

Definition Classes
Any
val clazz: Class[(T1, T2)]
def clone(): AnyRef

Attributes
protected
Definition Classes
CaseClassSerializer → AnyRef
Annotations
@throws( ... )
def copy(from: (T1, T2)): (T1, T2)

Definition Classes
CaseClassSerializer → TypeSerializer
def copy(from: (T1, T2), reuse: (T1, T2)): (T1, T2)

Definition Classes
CaseClassSerializer → TypeSerializer
def copy(arg0: DataInputView, arg1: DataOutputView): Unit

Definition Classes
TupleSerializerBase → TypeSerializer
Annotations
@throws( classOf[java.io.IOException] )
def createInstance(fields: Array[AnyRef]): (T1, T2)

Definition Classes
Tuple2CaseClassSerializer → ScalaCaseClassSerializer → TupleSerializerBase
def createInstance(): (T1, T2)

Definition Classes
CaseClassSerializer → TypeSerializer
def createOrReuseInstance(fields: Array[AnyRef], reuse: (T1, T2)): (T1, T2)

Definition Classes
CaseClassSerializer → TupleSerializerBase
def deserialize(source: DataInputView): (T1, T2)

Definition Classes
CaseClassSerializer → TypeSerializer
def deserialize(reuse: (T1, T2), source: DataInputView): (T1, T2)

Definition Classes
CaseClassSerializer → TypeSerializer
def duplicate(): CaseClassSerializer[(T1, T2)]

Definition Classes
CaseClassSerializer → TypeSerializer
final def eq(arg0: AnyRef): Boolean

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

Definition Classes
TupleSerializerBase → TypeSerializer → AnyRef → Any
var fields: Array[AnyRef]

Definition Classes
CaseClassSerializer
def finalize(): Unit

Attributes
protected[java.lang]
Definition Classes
AnyRef
Annotations
@throws( classOf[java.lang.Throwable] )
def getArity(): Int

Definition Classes
TupleSerializerBase
final def getClass(): Class[_]

Definition Classes
AnyRef → Any
Annotations
@native()
def getFieldSerializers(): Array[TypeSerializer[AnyRef]]

Definition Classes
TupleSerializerBase
def getLength(): Int

Definition Classes
TupleSerializerBase → TypeSerializer
def getTupleClass(): Class[(T1, T2)]

Definition Classes
TupleSerializerBase
def hashCode(): Int

Definition Classes
TupleSerializerBase → TypeSerializer → AnyRef → Any
def initArray(): Unit

Definition Classes
CaseClassSerializer
var instanceCreationFailed: Boolean

Definition Classes
CaseClassSerializer
def isImmutableType(): Boolean

Definition Classes
TupleSerializerBase → TypeSerializer
final def isInstanceOf[T0]: Boolean

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

Definition Classes
AnyRef
final def notify(): Unit

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

Definition Classes
AnyRef
Annotations
@native()
def serialize(value: (T1, T2), target: DataOutputView): Unit

Definition Classes
CaseClassSerializer → TypeSerializer
def snapshotConfiguration(): TypeSerializerSnapshot[(T1, T2)]

Definition Classes
Tuple2CaseClassSerializer → ScalaCaseClassSerializer → TypeSerializer
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
@native() @throws( ... )

Packages

Tuple2CaseClassSerializer

class Tuple2CaseClassSerializer[T1, T2] extends ScalaCaseClassSerializer[(T1, T2)]

Instance Constructors

Value Members

Inherited from ScalaCaseClassSerializer[(T1, T2)]

Inherited from CaseClassSerializer[(T1, T2)]

Inherited from Cloneable

Inherited from Cloneable

Inherited from TupleSerializerBase[(T1, T2)]

Inherited from TypeSerializer[(T1, T2)]

Inherited from Serializable

Inherited from AnyRef

Inherited from Any

Ungrouped

Packages

Tuple2CaseClassSerializer 

class Tuple2CaseClassSerializer[T1, T2] extends ScalaCaseClassSerializer[(T1, T2)]

Instance Constructors

Value Members

Inherited from ScalaCaseClassSerializer[(T1, T2)]

Inherited from CaseClassSerializer[(T1, T2)]

Inherited from Cloneable

Inherited from Cloneable

Inherited from TupleSerializerBase[(T1, T2)]

Inherited from TypeSerializer[(T1, T2)]

Inherited from Serializable

Inherited from AnyRef

Inherited from Any

Ungrouped

Tuple2CaseClassSerializer