akka.dispatch.PinnedDispatcher.scala Maven / Gradle / Ivy
/**
* Copyright (C) 2009-2014 Typesafe Inc.
*/
package akka.dispatch
import akka.actor.ActorCell
import scala.concurrent.duration.Duration
import scala.concurrent.duration.FiniteDuration
/**
* Dedicates a unique thread for each actor passed in as reference. Served through its messageQueue.
*
* The preferred way of creating dispatchers is to define configuration of it and use the
* the `lookup` method in [[akka.dispatch.Dispatchers]].
*/
class PinnedDispatcher(
_configurator: MessageDispatcherConfigurator,
_actor: ActorCell,
_id: String,
_shutdownTimeout: FiniteDuration,
_threadPoolConfig: ThreadPoolConfig)
extends Dispatcher(_configurator,
_id,
Int.MaxValue,
Duration.Zero,
_threadPoolConfig.copy(corePoolSize = 1, maxPoolSize = 1),
_shutdownTimeout) {
@volatile
private var owner: ActorCell = _actor
//Relies on an external lock provided by MessageDispatcher.attach
protected[akka] override def register(actorCell: ActorCell) = {
val actor = owner
if ((actor ne null) && actorCell != actor) throw new IllegalArgumentException("Cannot register to anyone but " + actor)
owner = actorCell
super.register(actorCell)
}
//Relies on an external lock provided by MessageDispatcher.detach
protected[akka] override def unregister(actor: ActorCell) = {
super.unregister(actor)
owner = null
}
}