DataSink

interface to implement custom data sink where result of a DAG is typically written

a DataSink could be a data store like HBase or simply a console

an example would be like

class ConsoleSink extends DataSink[String] {

  def open(context: TaskContext): Unit = {}

  def write(s: String): Unit = {
    Console.println(s)
  }

  def close(): Unit = {}
}

subclass is required to be serializable

Linear Supertypes

Serializable, AnyRef, Any

Known Subclasses

TypedDataSink

Abstract Value Members

abstract def close(): Unit

close connection to data sink invoked at onClose() method of Task
abstract def open(context: TaskContext): Unit

open connection to data sink invoked at onStart() method of Task
open connection to data sink invoked at onStart() method of Task
context
is the task context at runtime
abstract def write(message: Message): Unit

write message into data sink invoked at onNext() method of Task
write message into data sink invoked at onNext() method of Task
message
wraps data to be written out

Concrete 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
def clone(): AnyRef

Attributes
protected[java.lang]
Definition Classes
AnyRef
Annotations
@throws( ... )
final def eq(arg0: AnyRef): Boolean

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

Definition Classes
AnyRef → Any
def finalize(): Unit

Attributes
protected[java.lang]
Definition Classes
AnyRef
Annotations
@throws( classOf[java.lang.Throwable] )
final def getClass(): Class[_]

Definition Classes
AnyRef → Any
def hashCode(): Int

Definition Classes
AnyRef → Any
final def isInstanceOf[T0]: Boolean

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

Definition Classes
AnyRef
final def notify(): Unit

Definition Classes
AnyRef
final def notifyAll(): Unit

Definition Classes
AnyRef
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( ... )

Related Doc: package sink

trait DataSink extends Serializable

Abstract Value Members

abstract def close(): Unit

abstract def open(context: TaskContext): Unit

abstract def write(message: Message): Unit

Concrete Value Members

final def !=(arg0: Any): Boolean

final def ##(): Int

final def ==(arg0: Any): Boolean

final def asInstanceOf[T0]: T0

def clone(): AnyRef

final def eq(arg0: AnyRef): Boolean

def equals(arg0: Any): Boolean

def finalize(): Unit

final def getClass(): Class[_]

def hashCode(): Int

final def isInstanceOf[T0]: Boolean

final def ne(arg0: AnyRef): Boolean

final def notify(): Unit

final def notifyAll(): Unit

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

Inherited from Serializable

Inherited from AnyRef

Inherited from Any

Ungrouped