final class GCounter extends ReplicatedData with ReplicatedDataSerialization with RemovedNodePruning with FastMerge
Implements a 'Growing Counter' CRDT, also called a 'G-Counter'.
It is described in the paper A comprehensive study of Convergent and Commutative Replicated Data Types.
A G-Counter is a increment-only counter (inspired by vector clocks) in which only increment and merge are possible. Incrementing the counter adds 1 to the count for the current node. Divergent histories are resolved by taking the maximum count for each node (like a vector clock merge). The value of the counter is the sum of all node counts.
This class is immutable, i.e. "modifying" methods return a new instance.
- Annotations
- @SerialVersionUID()
- Source
- GCounter.scala
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- GCounter
- FastMerge
- RemovedNodePruning
- ReplicatedDataSerialization
- Serializable
- Serializable
- ReplicatedData
- AnyRef
- Any
- by any2stringadd
- by StringFormat
- by Ensuring
- by ArrowAssoc
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Type Members
-
type
T = GCounter
The type of the concrete implementation, e.g.
The type of the concrete implementation, e.g.
GSet[A]
. To be specified by subclass.- Definition Classes
- GCounter → ReplicatedData
Value Members
-
final
def
!=(arg0: Any): Boolean
- Definition Classes
- AnyRef → Any
-
final
def
##(): Int
- Definition Classes
- AnyRef → Any
-
def
+(delta: Long)(implicit node: Cluster): GCounter
Increment the counter with the delta specified.
Increment the counter with the delta specified. The delta must be zero or positive.
- def ->[B](y: B): (GCounter, B)
-
final
def
==(arg0: Any): Boolean
- Definition Classes
- AnyRef → Any
-
final
def
asInstanceOf[T0]: T0
- Definition Classes
- Any
-
def
clone(): AnyRef
- Attributes
- protected[java.lang]
- Definition Classes
- AnyRef
- Annotations
- @throws( ... )
- def ensuring(cond: (GCounter) ⇒ Boolean, msg: ⇒ Any): GCounter
- def ensuring(cond: (GCounter) ⇒ Boolean): GCounter
- def ensuring(cond: Boolean, msg: ⇒ Any): GCounter
- def ensuring(cond: Boolean): GCounter
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final
def
eq(arg0: AnyRef): Boolean
- Definition Classes
- AnyRef
-
def
equals(o: Any): Boolean
- Definition Classes
- GCounter → AnyRef → Any
-
def
finalize(): Unit
- Attributes
- protected[java.lang]
- Definition Classes
- AnyRef
- Annotations
- @throws( classOf[java.lang.Throwable] )
- def formatted(fmtstr: String): String
-
final
def
getClass(): Class[_]
- Definition Classes
- AnyRef → Any
-
def
getValue: BigInteger
Java API: Current total value of the counter.
-
def
hashCode(): Int
- Definition Classes
- GCounter → AnyRef → Any
-
def
increment(node: Cluster, delta: Long = 1): GCounter
Increment the counter with the delta specified.
Increment the counter with the delta specified. The delta must be zero or positive.
-
final
def
isInstanceOf[T0]: Boolean
- Definition Classes
- Any
-
def
merge(that: GCounter): GCounter
Monotonic merge function.
Monotonic merge function.
- Definition Classes
- GCounter → ReplicatedData
-
final
def
ne(arg0: AnyRef): Boolean
- Definition Classes
- AnyRef
-
def
needPruningFrom(removedNode: UniqueAddress): Boolean
Does it have any state changes from a specific node, which has been removed from the cluster.
Does it have any state changes from a specific node, which has been removed from the cluster.
- Definition Classes
- GCounter → RemovedNodePruning
-
final
def
notify(): Unit
- Definition Classes
- AnyRef
-
final
def
notifyAll(): Unit
- Definition Classes
- AnyRef
-
def
prune(removedNode: UniqueAddress, collapseInto: UniqueAddress): GCounter
When the
removed
node has been removed from the cluster the state changes from that node will be pruned by collapsing the data entries to another node.When the
removed
node has been removed from the cluster the state changes from that node will be pruned by collapsing the data entries to another node.- Definition Classes
- GCounter → RemovedNodePruning
-
def
pruningCleanup(removedNode: UniqueAddress): GCounter
Remove data entries from a node that has been removed from the cluster and already been pruned.
Remove data entries from a node that has been removed from the cluster and already been pruned.
- Definition Classes
- GCounter → RemovedNodePruning
-
final
def
synchronized[T0](arg0: ⇒ T0): T0
- Definition Classes
- AnyRef
-
def
toString(): String
- Definition Classes
- GCounter → AnyRef → Any
-
def
value: BigInt
Scala API: Current total value of the counter.
-
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( ... )
- def →[B](y: B): (GCounter, B)
Shadowed Implicit Value Members
-
def
+(other: String): String
- Implicit
- This member is added by an implicit conversion from GCounter to any2stringadd[GCounter] performed by method any2stringadd in scala.Predef.
- Shadowing
- This implicitly inherited member is shadowed by one or more members in this class.
To access this member you can use a type ascription:(gCounter: any2stringadd[GCounter]).+(other)
- Definition Classes
- any2stringadd