Class/Object

com.comcast.xfinity.sirius.api.impl.bridge

PaxosStateBridge

Related Docs: object PaxosStateBridge | package bridge

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class PaxosStateBridge extends Actor with MonitoringHooks

Actor responsible for bridging the gap between the Paxos layer and the persistence layer.

This Actor contains the necessary logic for assuring that events are only applied to the persistence layer in order. As designed currently (on purpose) the Paxos system will blindly deliver decisions, even if they have already been decided. This allows nodes that are behind to catch up. Also, there is no guarantee that events will arrive in order, so a later event may arrive before a current event.

To accomplish this we buffer events that come before their time, only keeping the first copy of each.

XXX: in its current form it does not wait for confirmation that an event has been committed to disk by the persistence layer, we should really add that, but for now this should be good enough.

Linear Supertypes
MonitoringHooks, Actor, AnyRef, Any
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Inherited
  1. PaxosStateBridge
  2. MonitoringHooks
  3. Actor
  4. AnyRef
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Visibility
  1. Public
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Instance Constructors

  1. new PaxosStateBridge(startingSeq: Long, stateSupervisor: ActorRef, siriusSupervisor: ActorRef, childProvider: ChildProvider, catchupFreq: FiniteDuration, config: SiriusConfiguration)

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    startingSeq

    the sequence number to start with

    stateSupervisor

    reference to the subsystem encapsulating system state. In the future as the code settles down we may want to have this directly point to the persistence layer, but for now we funnel everything through the state subsystem supervisor for abstraction, such that we can easily refactor and not worry about messing stuff up.

    siriusSupervisor

    reference to the Sirius Supervisor Actor for routing DecisionHints to the Paxos Subsystem

Type Members

  1. class PaxosStateBridgeInfo extends PaxosStateBridgeInfoMBean

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  2. trait PaxosStateBridgeInfoMBean extends AnyRef

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    Monitoring hooks

  3. type Receive = PartialFunction[Any, Unit]

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    Definition Classes
    Actor

Value Members

  1. final def !=(arg0: Any): Boolean

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    Definition Classes
    AnyRef → Any

  2. final def ##(): Int

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    Definition Classes
    AnyRef → Any

  3. final def ==(arg0: Any): Boolean

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    Definition Classes
    AnyRef → Any

  4. def aroundPostRestart(reason: Throwable): Unit

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    Attributes
    protected[akka]
    Definition Classes
    Actor

  5. def aroundPostStop(): Unit

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    Attributes
    protected[akka]
    Definition Classes
    Actor

  6. def aroundPreRestart(reason: Throwable, message: Option[Any]): Unit

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    Attributes
    protected[akka]
    Definition Classes
    Actor

  7. def aroundPreStart(): Unit

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    Attributes
    protected[akka]
    Definition Classes
    Actor

  8. def aroundReceive(receive: akka.actor.Actor.Receive, msg: Any): Unit

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    Attributes
    protected[akka]
    Definition Classes
    Actor

  9. final def asInstanceOf[T0]: T0

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    Definition Classes
    Any

  10. val catchupSchedule: Cancellable

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  11. val catchupSupervisor: ActorRef

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  12. def clone(): AnyRef

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    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )

  13. implicit val context: ActorContext

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    Definition Classes
    Actor

  14. final def eq(arg0: AnyRef): Boolean

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    Definition Classes
    AnyRef

  15. def equals(arg0: Any): Boolean

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    Definition Classes
    AnyRef → Any

  16. var eventBuffer: RichJTreeMap[Long, OrderedEvent]

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  17. implicit val executionContext: ExecutionContextExecutor

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  18. def finalize(): Unit

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    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( classOf[java.lang.Throwable] )

  19. final def getClass(): Class[_]

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    Definition Classes
    AnyRef → Any

  20. def hashCode(): Int

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    Definition Classes
    AnyRef → Any

  21. final def isInstanceOf[T0]: Boolean

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    Definition Classes
    Any

  22. final def ne(arg0: AnyRef): Boolean

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    Definition Classes
    AnyRef

  23. var nextSeq: Long

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  24. final def notify(): Unit

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    Definition Classes
    AnyRef

  25. final def notifyAll(): Unit

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    Definition Classes
    AnyRef

  26. def postRestart(reason: Throwable): Unit

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    Definition Classes
    Actor
    Annotations
    @throws( classOf[java.lang.Exception] )

  27. def postStop(): Unit

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    Definition Classes
    PaxosStateBridge → Actor

  28. def preRestart(reason: Throwable, message: Option[Any]): Unit

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    Definition Classes
    Actor
    Annotations
    @throws( classOf[java.lang.Exception] )

  29. def preStart(): Unit

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    Definition Classes
    PaxosStateBridge → Actor

  30. def receive: PartialFunction[Any, Unit]

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    Definition Classes
    PaxosStateBridge → Actor

  31. def registerMonitor(mbean: ⇒ Any, siriusConfig: SiriusConfiguration)(implicit context: ActorContext): Unit

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    If sirius is configured to do such, register mbean as an MBean

    If sirius is configured to do such, register mbean as an MBean

    The object name derived for this object is kept locally on this instance, and will be unregistered when unregisterMonitors is called.

    mbean

    A call-by-name parameter to get the mbean to register, if sirisConfiguration is not configured with an MBeanFactory, then this is not used, and thus not called

    siriusConfig

    Sirius's configuration, from which it is decided if mbean should be registered as an MBean

    context

    the ActorContext this is run from, note it is necessary that this is run within an Actor for this to be available

    Definition Classes
    MonitoringHooks

  32. implicit final val self: ActorRef

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    Definition Classes
    Actor

  33. final def sender(): ActorRef

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    Definition Classes
    Actor

  34. var startupCatchupDuration: Option[Long]

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  35. val startupTimestamp: Long

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  36. def supervisorStrategy: SupervisorStrategy

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    Definition Classes
    Actor

  37. final def synchronized[T0](arg0: ⇒ T0): T0

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    Definition Classes
    AnyRef

  38. def toString(): String

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    Definition Classes
    AnyRef → Any

  39. def unhandled(message: Any): Unit

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    Definition Classes
    Actor

  40. def unregisterMonitors(siriusConfig: SiriusConfiguration): Unit

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    Unregister all MBeans registered by this instance

    Unregister all MBeans registered by this instance

    siriusConfig

    Sirius's configuration, from which it is decided if mbean should be registered as an MBean

    Definition Classes
    MonitoringHooks

  41. final def wait(): Unit

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    Definition Classes
    AnyRef
    Annotations
    @throws( ... )

  42. final def wait(arg0: Long, arg1: Int): Unit

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    Definition Classes
    AnyRef
    Annotations
    @throws( ... )

  43. final def wait(arg0: Long): Unit

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    Definition Classes
    AnyRef
    Annotations
    @throws( ... )

Inherited from MonitoringHooks

Inherited from Actor

Inherited from AnyRef

Inherited from Any

Ungrouped