FutureTransformer

An alternative interface for performing Future transformations; that is, converting a Future[A] to a Future[B]. This interface is designed to be friendly to Java users since it does not require creating many small Function objects. It is used in conjunction with transformedBy.

You must override one of {map, flatMap}. If you override both map and flatMap, flatMap takes precedence. If you fail to override one of {map, flatMap}, an AbstractMethodError will be thrown at Runtime.

Note: to end a result with a failure, we encourage you to use either flatMap or rescue and return a failed Future, instead of throwing an exception. A failed future can be used by returning Future.exception(throwable) instead of throwing an exception.

See also: FutureEventListener for a Java API for side-effects.
Future.transformedBy for using it with a Future.
Future.transform which is the equivalent Scala API for further details.

Linear Supertypes

AnyRef, Any

Instance Constructors

new FutureTransformer()

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] )
def flatMap(value: A): Future[B]

Invoked if the computation completes successfully.
Invoked if the computation completes successfully. Returns the new transformed value in a Future.
final def getClass(): Class[_]

Definition Classes
AnyRef → Any
def handle(throwable: Throwable): B

Invoked if the computation fails.
Invoked if the computation fails. Returns the new transformed value.
def hashCode(): Int

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

Definition Classes
Any
def map(value: A): B

Invoked if the computation completes successfully.
Invoked if the computation completes successfully. Returns the new transformed value.
Note: this method will throw an AbstractMethodError if it is not overridden.
final def ne(arg0: AnyRef): Boolean

Definition Classes
AnyRef
final def notify(): Unit

Definition Classes
AnyRef
final def notifyAll(): Unit

Definition Classes
AnyRef
def rescue(throwable: Throwable): Future[B]

Invoked if the computation completes unsuccessfully.
Invoked if the computation completes unsuccessfully. Returns the new Future value.
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 util

abstract class FutureTransformer[-A, +B] extends AnyRef

Instance Constructors

new FutureTransformer()

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

def flatMap(value: A): Future[B]

final def getClass(): Class[_]

def handle(throwable: Throwable): B

def hashCode(): Int

final def isInstanceOf[T0]: Boolean

def map(value: A): B

final def ne(arg0: AnyRef): Boolean

final def notify(): Unit

final def notifyAll(): Unit

def rescue(throwable: Throwable): Future[B]

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 AnyRef

Inherited from Any

Ungrouped