akka.NotUsed.scala Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of akkajsactor_sjs0.6_2.12 Show documentation

akkaJsActor

There is a newer version: 2.2.6.3

Show newest version

/*
 * Copyright (C) 2016-2019 Lightbend Inc. 
 */

package akka

/**
 * This type is used in generic type signatures wherever the actual value is of no importance.
 * It is a combination of Scala’s `Unit` and Java’s `Void`, which both have different issues when
 * used from the other language. An example use-case is the materialized value of an Akka Stream for cases
 * where no result shall be returned from materialization.
 */
sealed abstract class NotUsed

case object NotUsed extends NotUsed {

  /**
   * Java API: the singleton instance
   */
  def getInstance(): NotUsed = this

  /**
   * Java API: the singleton instance
   *
   * This is equivalent to [[NotUsed#getInstance()]], but can be used with static import.
   */
  def notUsed(): NotUsed = this
}