akka.stream.Supervision.scala Maven / Gradle / Ivy
/**
* Copyright (C) 2015-2017 Lightbend Inc.
*/
package akka.stream
import akka.japi.{ function ⇒ japi }
object Supervision {
sealed trait Directive
/**
* Scala API: The stream will be completed with failure if application code for processing an element
* throws an exception.
*/
case object Stop extends Directive
/**
* Java API: The stream will be completed with failure if application code for processing an element
* throws an exception.
*/
def stop = Stop
/**
* Scala API: The element is dropped and the stream continues if application code for processing
* an element throws an exception.
*/
case object Resume extends Directive
/**
* Java API: The element is dropped and the stream continues if application code for processing
* an element throws an exception.
*/
def resume = Resume
/**
* Scala API: The element is dropped and the stream continues after restarting the stage
* if application code for processing an element throws an exception.
* Restarting a stage means that any accumulated state is cleared. This is typically
* performed by creating a new instance of the stage.
*/
case object Restart extends Directive
/**
* Java API: The element is dropped and the stream continues after restarting the stage
* if application code for processing an element throws an exception.
* Restarting a stage means that any accumulated state is cleared. This is typically
* performed by creating a new instance of the stage.
*/
def restart = Restart
type Decider = Function[Throwable, Directive]
/**
* Scala API: [[Decider]] that returns [[Stop]] for all exceptions.
*/
val stoppingDecider: Decider with japi.Function[Throwable, Directive] =
new Decider with japi.Function[Throwable, Directive] {
override def apply(e: Throwable) = Stop
}
/**
* Java API: Decider function that returns [[#stop]] for all exceptions.
*/
val getStoppingDecider: japi.Function[Throwable, Directive] = stoppingDecider
/**
* Scala API: [[Decider]] that returns [[Resume]] for all exceptions.
*/
val resumingDecider: Decider with japi.Function[Throwable, Directive] =
new Decider with japi.Function[Throwable, Directive] {
override def apply(e: Throwable) = Resume
}
/**
* Java API: Decider function that returns [[#resume]] for all exceptions.
*/
val getResumingDecider: japi.Function[Throwable, Directive] = resumingDecider
/**
* Scala API: [[Decider]] that returns [[Restart]] for all exceptions.
*/
val restartingDecider: Decider with japi.Function[Throwable, Directive] =
new Decider with japi.Function[Throwable, Directive] {
override def apply(e: Throwable) = Restart
}
/**
* Java API: Decider function that returns [[#restart]] for all exceptions.
*/
val getRestartingDecider: japi.Function[Throwable, Directive] = restartingDecider
}