akka.cluster

VectorClock

Related Doc: package cluster

case class VectorClock(versions: TreeMap[Node, Long] = ...) extends Product with Serializable

Representation of a Vector-based clock (counting clock), inspired by Lamport logical clocks.

Reference:
   1) Leslie Lamport (1978). "Time, clocks, and the ordering of events in a distributed system". Communications of the ACM 21 (7): 558-565.
   2) Friedemann Mattern (1988). "Virtual Time and Global States of Distributed Systems". Workshop on Parallel and Distributed Algorithms: pp. 215-226

Based on code from the 'vlock' VectorClock library by Coda Hale.

Annotations
@SerialVersionUID()
Source
VectorClock.scala
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  1. VectorClock
  2. Serializable
  3. Serializable
  4. Product
  5. Equals
  6. AnyRef
  7. Any
Implicitly
  1. by any2stringadd
  2. by StringFormat
  3. by Ensuring
  4. by ArrowAssoc
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Instance Constructors

  1. new VectorClock(versions: TreeMap[Node, Long] = ...)

Value Members

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

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

    Definition Classes
    AnyRef → Any
  3. def +(other: String): String

    Implicit information
    This member is added by an implicit conversion from VectorClock to any2stringadd[VectorClock] performed by method any2stringadd in scala.Predef.
    Definition Classes
    any2stringadd
  4. def ->[B](y: B): (VectorClock, B)

    Implicit information
    This member is added by an implicit conversion from VectorClock to ArrowAssoc[VectorClock] performed by method ArrowAssoc in scala.Predef.
    Definition Classes
    ArrowAssoc
    Annotations
    @inline()
  5. def :+(node: Node): VectorClock

    Increment the version for the node passed as argument.

    Increment the version for the node passed as argument. Returns a new VectorClock.

  6. def <(that: VectorClock): Boolean

    Returns true if this is before that else false.

    Returns true if this is before that else false.

  7. def <>(that: VectorClock): Boolean

    Returns true if this and that are concurrent else false.

    Returns true if this and that are concurrent else false.

  8. def ==(that: VectorClock): Boolean

    Returns true if this VectorClock has the same history as the 'that' VectorClock else false.

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

    Definition Classes
    AnyRef → Any
  10. def >(that: VectorClock): Boolean

    Returns true if this is after that else false.

    Returns true if this is after that else false.

  11. final def asInstanceOf[T0]: T0

    Definition Classes
    Any
  12. def clone(): AnyRef

    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  13. def compareTo(that: VectorClock): Ordering

    Compare two vector clocks.

    Compare two vector clocks. The outcome will be one of the following:

    1. Clock 1 is SAME (==)       as Clock 2 iff for all i c1(i) == c2(i)
    2. Clock 1 is BEFORE (<)      Clock 2 iff for all i c1(i) <= c2(i) and there exist a j such that c1(j) < c2(j)
    3. Clock 1 is AFTER (>)       Clock 2 iff for all i c1(i) >= c2(i) and there exist a j such that c1(j) > c2(j).
    4. Clock 1 is CONCURRENT (<>) to Clock 2 otherwise.
  14. def ensuring(cond: (VectorClock) ⇒ Boolean, msg: ⇒ Any): VectorClock

    Implicit information
    This member is added by an implicit conversion from VectorClock to Ensuring[VectorClock] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  15. def ensuring(cond: (VectorClock) ⇒ Boolean): VectorClock

    Implicit information
    This member is added by an implicit conversion from VectorClock to Ensuring[VectorClock] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  16. def ensuring(cond: Boolean, msg: ⇒ Any): VectorClock

    Implicit information
    This member is added by an implicit conversion from VectorClock to Ensuring[VectorClock] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  17. def ensuring(cond: Boolean): VectorClock

    Implicit information
    This member is added by an implicit conversion from VectorClock to Ensuring[VectorClock] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  18. final def eq(arg0: AnyRef): Boolean

    Definition Classes
    AnyRef
  19. def finalize(): Unit

    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( classOf[java.lang.Throwable] )
  20. def formatted(fmtstr: String): String

    Implicit information
    This member is added by an implicit conversion from VectorClock to StringFormat[VectorClock] performed by method StringFormat in scala.Predef.
    Definition Classes
    StringFormat
    Annotations
    @inline()
  21. final def getClass(): Class[_]

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

    Definition Classes
    Any
  23. def merge(that: VectorClock): VectorClock

    Merges this VectorClock with another VectorClock.

    Merges this VectorClock with another VectorClock. E.g. merges its versioned history.

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

    Definition Classes
    AnyRef
  25. final def notify(): Unit

    Definition Classes
    AnyRef
  26. final def notifyAll(): Unit

    Definition Classes
    AnyRef
  27. final def synchronized[T0](arg0: ⇒ T0): T0

    Definition Classes
    AnyRef
  28. def toString(): String

    Definition Classes
    VectorClock → AnyRef → Any
  29. val versions: TreeMap[Node, Long]

  30. final def wait(): Unit

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

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

    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  33. def [B](y: B): (VectorClock, B)

    Implicit information
    This member is added by an implicit conversion from VectorClock to ArrowAssoc[VectorClock] performed by method ArrowAssoc in scala.Predef.
    Definition Classes
    ArrowAssoc

Inherited from Serializable

Inherited from Serializable

Inherited from Product

Inherited from Equals

Inherited from AnyRef

Inherited from Any

Inherited by implicit conversion any2stringadd from VectorClock to any2stringadd[VectorClock]

Inherited by implicit conversion StringFormat from VectorClock to StringFormat[VectorClock]

Inherited by implicit conversion Ensuring from VectorClock to Ensuring[VectorClock]

Inherited by implicit conversion ArrowAssoc from VectorClock to ArrowAssoc[VectorClock]

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