PaxosData

This algebraic type holds the state of a node in the cluster.

progress: The highest promised and highest committed progress of a node in the cluster.
leaderHeartbeat: The last heartbeat value seen from a leader. Note that clocks are not synced so this value is only used as evidence that a stable leader is up whereas the paxos number and committed slot are taken as authoritative that a new leader is making progress.
timeout: The next randomised point in time that this node will timeout. Followers timeout on Commit messages and become a Recoverer. Recoverers timeout on PrepareResponses and AcceptResponses. Leaders timeout on AcceptResponses.
clusterSize: The current size of the cluster.
prepareResponses: The outstanding uncommitted proposed work of the leader take over phase during the recovery of a leader failover. Each key is an identifier of a prepare for which we are collecting a majority response to determine the highest proposed value of the previous leader if any.
epoch: The leaders paxos number when leading.
acceptResponses: Tracking of responses to accept messages when Recoverer or Leader. Each key is an identifier of the command we want to commit. Each value is a map of the ack/nacks of each cluster node with a timeout.
clientCommands: The client work outstanding with the leader. The map key is the accept identifier and the value is a tuple of the client command and the client ref.

Linear Supertypes

Serializable, Serializable, Product, Equals, AnyRef, Any

Instance Constructors

new PaxosData(progress: Progress, leaderHeartbeat: Long, timeout: Long, clusterSize: Int, prepareResponses: SortedMap[Identifier, Map[Int, PrepareResponse]] = PaxosData.emptyPrepares, epoch: Option[BallotNumber] = None, acceptResponses: SortedMap[Identifier, AcceptResponsesAndTimeout] = PaxosData.emptyAccepts, clientCommands: Map[Identifier, (CommandValue, String)] = Map.empty)

progress
The highest promised and highest committed progress of a node in the cluster.
leaderHeartbeat
The last heartbeat value seen from a leader. Note that clocks are not synced so this value is only used as evidence that a stable leader is up whereas the paxos number and committed slot are taken as authoritative that a new leader is making progress.
timeout
The next randomised point in time that this node will timeout. Followers timeout on Commit messages and become a Recoverer. Recoverers timeout on PrepareResponses and AcceptResponses. Leaders timeout on AcceptResponses.
clusterSize
The current size of the cluster.
prepareResponses
The outstanding uncommitted proposed work of the leader take over phase during the recovery of a leader failover. Each key is an identifier of a prepare for which we are collecting a majority response to determine the highest proposed value of the previous leader if any.
epoch
The leaders paxos number when leading.
acceptResponses
Tracking of responses to accept messages when Recoverer or Leader. Each key is an identifier of the command we want to commit. Each value is a map of the ack/nacks of each cluster node with a timeout.
clientCommands
The client work outstanding with the leader. The map key is the accept identifier and the value is a tuple of the client command and the client ref.

Value Members

final def !=(arg0: Any): Boolean

Definition Classes
AnyRef → Any
final def ##(): Int

Definition Classes
AnyRef → Any
final def ==(arg0: Any): Boolean

Definition Classes
AnyRef → Any
val acceptResponses: SortedMap[Identifier, AcceptResponsesAndTimeout]

Tracking of responses to accept messages when Recoverer or Leader.
Tracking of responses to accept messages when Recoverer or Leader. Each key is an identifier of the command we want to commit. Each value is a map of the ack/nacks of each cluster node with a timeout.
final def asInstanceOf[T0]: T0

Definition Classes
Any
val clientCommands: Map[Identifier, (CommandValue, String)]

The client work outstanding with the leader.
The client work outstanding with the leader. The map key is the accept identifier and the value is a tuple of the client command and the client ref.
def clone(): AnyRef

Attributes
protected[java.lang]
Definition Classes
AnyRef
Annotations
@throws( ... )
val clusterSize: Int

The current size of the cluster.
val epoch: Option[BallotNumber]

The leaders paxos number when leading.
final def eq(arg0: AnyRef): Boolean

Definition Classes
AnyRef
def finalize(): Unit

Attributes
protected[java.lang]
Definition Classes
AnyRef
Annotations
@throws( classOf[java.lang.Throwable] )
final def getClass(): Class[_]

Definition Classes
AnyRef → Any
final def isInstanceOf[T0]: Boolean

Definition Classes
Any
val leaderHeartbeat: Long

The last heartbeat value seen from a leader.
The last heartbeat value seen from a leader. Note that clocks are not synced so this value is only used as evidence that a stable leader is up whereas the paxos number and committed slot are taken as authoritative that a new leader is making progress.
final def ne(arg0: AnyRef): Boolean

Definition Classes
AnyRef
final def notify(): Unit

Definition Classes
AnyRef
final def notifyAll(): Unit

Definition Classes
AnyRef
val prepareResponses: SortedMap[Identifier, Map[Int, PrepareResponse]]

The outstanding uncommitted proposed work of the leader take over phase during the recovery of a leader failover.
The outstanding uncommitted proposed work of the leader take over phase during the recovery of a leader failover. Each key is an identifier of a prepare for which we are collecting a majority response to determine the highest proposed value of the previous leader if any.
val progress: Progress

The highest promised and highest committed progress of a node in the cluster.
final def synchronized[T0](arg0: ⇒ T0): T0

Definition Classes
AnyRef
val timeout: Long

The next randomised point in time that this node will timeout.
The next randomised point in time that this node will timeout. Followers timeout on Commit messages and become a Recoverer. Recoverers timeout on PrepareResponses and AcceptResponses. Leaders timeout on AcceptResponses.
final def wait(): Unit

Definition Classes
AnyRef
Annotations
@throws( ... )
final def wait(arg0: Long, arg1: Int): Unit

Definition Classes
AnyRef
Annotations
@throws( ... )
final def wait(arg0: Long): Unit

Definition Classes
AnyRef
Annotations
@throws( ... )

Related Docs: object PaxosData | package library

Instance Constructors

Value Members

final def !=(arg0: Any): Boolean

final def ##(): Int

final def ==(arg0: Any): Boolean

val acceptResponses: SortedMap[Identifier, AcceptResponsesAndTimeout]

final def asInstanceOf[T0]: T0

val clientCommands: Map[Identifier, (CommandValue, String)]

def clone(): AnyRef

val clusterSize: Int

val epoch: Option[BallotNumber]

final def eq(arg0: AnyRef): Boolean

def finalize(): Unit

final def getClass(): Class[_]

final def isInstanceOf[T0]: Boolean

val leaderHeartbeat: Long

final def ne(arg0: AnyRef): Boolean

final def notify(): Unit

final def notifyAll(): Unit

val prepareResponses: SortedMap[Identifier, Map[Int, PrepareResponse]]

val progress: Progress

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

val timeout: Long

final def wait(): Unit

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

final def wait(arg0: Long): Unit

Inherited from Serializable

Inherited from Serializable

Inherited from Product

Inherited from Equals

Inherited from AnyRef

Inherited from Any

Ungrouped