final case class BalancingPool(nrOfInstances: Int, supervisorStrategy: SupervisorStrategy = Pool.defaultSupervisorStrategy, routerDispatcher: String = Dispatchers.DefaultDispatcherId) extends Pool with Product with Serializable
A router pool that will try to redistribute work from busy routees to idle routees. All routees share the same mailbox.
Although the technique used in this implementation is commonly known as "work stealing", the actual implementation is probably best described as "work donating" because the actor of which work is being stolen takes the initiative.
The configuration parameter trumps the constructor arguments. This means that
if you provide nrOfInstances during instantiation they will be ignored if
the router is defined in the configuration file for the actor being used.
Supervision Setup
Any routees that are created by a router will be created as the router's children. The router is therefore also the children's supervisor.
The supervision strategy of the router actor can be configured with #withSupervisorStrategy. If no strategy is provided, routers default to a strategy of “always escalate”. This means that errors are passed up to the router's supervisor for handling.
The router's supervisor will treat the error as an error with the router itself. Therefore a directive to stop or restart will cause the router itself to stop or restart. The router, in turn, will cause its children to stop and restart.
- nrOfInstances
initial number of routees in the pool
- supervisorStrategy
strategy for supervising the routees, see 'Supervision Setup'
- routerDispatcher
dispatcher to use for the router head actor, which handles supervision, death watch and router management messages
- Annotations
- @SerialVersionUID()
- Source
- Balancing.scala
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- By Inheritance
- BalancingPool
- Product
- Equals
- Pool
- RouterConfig
- Serializable
- AnyRef
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- by any2stringadd
- by StringFormat
- by Ensuring
- by ArrowAssoc
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- Public
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Instance Constructors
- new BalancingPool(nr: Int)
Java API
Java API
- nr
initial number of routees in the pool
- new BalancingPool(config: Config)
- new BalancingPool(nrOfInstances: Int, supervisorStrategy: SupervisorStrategy = Pool.defaultSupervisorStrategy, routerDispatcher: String = Dispatchers.DefaultDispatcherId)
- nrOfInstances
initial number of routees in the pool
- supervisorStrategy
strategy for supervising the routees, see 'Supervision Setup'
- routerDispatcher
dispatcher to use for the router head actor, which handles supervision, death watch and router management messages
Value Members
- final def !=(arg0: Any): Boolean
- Definition Classes
- AnyRef → Any
- final def ##: Int
- Definition Classes
- AnyRef → Any
- def +(other: String): String
- Implicit
- This member is added by an implicit conversion from BalancingPool toany2stringadd[BalancingPool] performed by method any2stringadd in scala.Predef.
- Definition Classes
- any2stringadd
- def ->[B](y: B): (BalancingPool, B)
- Implicit
- This member is added by an implicit conversion from BalancingPool toArrowAssoc[BalancingPool] performed by method ArrowAssoc in scala.Predef.
- Definition Classes
- ArrowAssoc
- Annotations
- @inline()
- final def ==(arg0: Any): Boolean
- Definition Classes
- AnyRef → Any
- final def asInstanceOf[T0]: T0
- Definition Classes
- Any
- def clone(): AnyRef
- Attributes
- protected[lang]
- Definition Classes
- AnyRef
- Annotations
- @throws(classOf[java.lang.CloneNotSupportedException]) @native() @HotSpotIntrinsicCandidate()
- def createRouter(system: ActorSystem): Router
Create the actual router, responsible for routing messages to routees.
Create the actual router, responsible for routing messages to routees.
- system
the ActorSystem this router belongs to
- Definition Classes
- BalancingPool → RouterConfig
- def ensuring(cond: (BalancingPool) => Boolean, msg: => Any): BalancingPool
- Implicit
- This member is added by an implicit conversion from BalancingPool toEnsuring[BalancingPool] performed by method Ensuring in scala.Predef.
- Definition Classes
- Ensuring
- def ensuring(cond: (BalancingPool) => Boolean): BalancingPool
- Implicit
- This member is added by an implicit conversion from BalancingPool toEnsuring[BalancingPool] performed by method Ensuring in scala.Predef.
- Definition Classes
- Ensuring
- def ensuring(cond: Boolean, msg: => Any): BalancingPool
- Implicit
- This member is added by an implicit conversion from BalancingPool toEnsuring[BalancingPool] performed by method Ensuring in scala.Predef.
- Definition Classes
- Ensuring
- def ensuring(cond: Boolean): BalancingPool
- Implicit
- This member is added by an implicit conversion from BalancingPool toEnsuring[BalancingPool] performed by method Ensuring in scala.Predef.
- Definition Classes
- Ensuring
- final def eq(arg0: AnyRef): Boolean
- Definition Classes
- AnyRef
- final def getClass(): Class[_ <: AnyRef]
- Definition Classes
- AnyRef → Any
- Annotations
- @native() @HotSpotIntrinsicCandidate()
- final def isInstanceOf[T0]: Boolean
- Definition Classes
- Any
- def isManagementMessage(msg: Any): Boolean
Is the message handled by the router head actor or the #routingLogicController actor.
Is the message handled by the router head actor or the #routingLogicController actor.
- Definition Classes
- RouterConfig
- final def ne(arg0: AnyRef): Boolean
- Definition Classes
- AnyRef
- final def notify(): Unit
- Definition Classes
- AnyRef
- Annotations
- @native() @HotSpotIntrinsicCandidate()
- final def notifyAll(): Unit
- Definition Classes
- AnyRef
- Annotations
- @native() @HotSpotIntrinsicCandidate()
- def nrOfInstances(sys: ActorSystem): Int
- Definition Classes
- BalancingPool → Pool
- val nrOfInstances: Int
- def productElementNames: Iterator[String]
- Definition Classes
- Product
- def props(routeeProps: Props): Props
akka.actor.Props for a pool router based on the settings defined by this instance and the supplied akka.actor.Props for the routees created by the router.
akka.actor.Props for a pool router based on the settings defined by this instance and the supplied akka.actor.Props for the routees created by the router.
- Definition Classes
- Pool
- val resizer: Option[Resizer]
Resizer cannot be used together with BalancingPool
Resizer cannot be used together with BalancingPool
- Definition Classes
- BalancingPool → Pool
- val routerDispatcher: String
Dispatcher ID to use for running the “head” actor, which handles supervision, death watch and router management messages
Dispatcher ID to use for running the “head” actor, which handles supervision, death watch and router management messages
- Definition Classes
- BalancingPool → RouterConfig
- def routingLogicController(routingLogic: RoutingLogic): Option[Props]
Possibility to define an actor for controlling the routing logic from external stimuli (e.g.
Possibility to define an actor for controlling the routing logic from external stimuli (e.g. monitoring metrics). This actor will be a child of the router "head" actor. Management messages not handled by the "head" actor are delegated to this controller actor.
- Definition Classes
- RouterConfig
- def stopRouterWhenAllRouteesRemoved: Boolean
- Definition Classes
- Pool → RouterConfig
- val supervisorStrategy: SupervisorStrategy
SupervisorStrategy for the head actor, i.e.
SupervisorStrategy for the head actor, i.e. for supervising the routees of the pool.
- Definition Classes
- BalancingPool → Pool
- final def synchronized[T0](arg0: => T0): T0
- Definition Classes
- AnyRef
- def usePoolDispatcher: Boolean
Use a dedicated dispatcher for the routees of the pool.
Use a dedicated dispatcher for the routees of the pool. The dispatcher is defined in 'pool-dispatcher' configuration property in the deployment section of the router.
- Definition Classes
- Pool
- def verifyConfig(path: ActorPath): Unit
Check that everything is there which is needed.
Check that everything is there which is needed. Called in constructor of RoutedActorRef to fail early.
- Definition Classes
- RouterConfig
- final def wait(arg0: Long, arg1: Int): Unit
- Definition Classes
- AnyRef
- Annotations
- @throws(classOf[java.lang.InterruptedException])
- final def wait(arg0: Long): Unit
- Definition Classes
- AnyRef
- Annotations
- @throws(classOf[java.lang.InterruptedException]) @native()
- final def wait(): Unit
- Definition Classes
- AnyRef
- Annotations
- @throws(classOf[java.lang.InterruptedException])
- def withDispatcher(dispatcherId: String): BalancingPool
Setting the dispatcher to be used for the router head actor, which handles supervision, death watch and router management messages.
- def withFallback(other: RouterConfig): RouterConfig
Uses the supervisor strategy of the given RouterConfig if this RouterConfig doesn't have one.
Uses the supervisor strategy of the given RouterConfig if this RouterConfig doesn't have one.
- Definition Classes
- BalancingPool → RouterConfig
- def withSupervisorStrategy(strategy: SupervisorStrategy): BalancingPool
Setting the supervisor strategy to be used for the “head” Router actor.
Deprecated Value Members
- def finalize(): Unit
- Attributes
- protected[lang]
- Definition Classes
- AnyRef
- Annotations
- @throws(classOf[java.lang.Throwable]) @Deprecated @Deprecated
- Deprecated
- def formatted(fmtstr: String): String
- Implicit
- This member is added by an implicit conversion from BalancingPool toStringFormat[BalancingPool] performed by method StringFormat in scala.Predef.
- Definition Classes
- StringFormat
- Annotations
- @deprecated @inline()
- Deprecated
(Since version 2.12.16) Use
formatString.format(value)instead ofvalue.formatted(formatString), or use thef""string interpolator. In Java 15 and later,formattedresolves to the new method in String which has reversed parameters.
- def →[B](y: B): (BalancingPool, B)
- Implicit
- This member is added by an implicit conversion from BalancingPool toArrowAssoc[BalancingPool] performed by method ArrowAssoc in scala.Predef.
- Definition Classes
- ArrowAssoc
- Annotations
- @deprecated
- Deprecated
(Since version 2.13.0) Use
->instead. If you still wish to display it as one character, consider using a font with programming ligatures such as Fira Code.