java.lang.Object
- akka.cluster.ddata.VersionVector

All Implemented Interfaces:

RemovedNodePruning, ReplicatedData, ReplicatedDataSerialization, java.io.Serializable, scala.Serializable

Direct Known Subclasses:

ManyVersionVector, OneVersionVector
```
public abstract class VersionVector
extends java.lang.Object
implements ReplicatedData, ReplicatedDataSerialization, RemovedNodePruning
```
Increment the version for the node passed as argument. Returns a new VersionVector.

See Also:

Serialized Form

Nested Class Summary

Nested Classes
Modifier and Type	Class	Description
`static class`	`VersionVector.After$`
`static class`	`VersionVector.Before$`
`static class`	`VersionVector.Concurrent$`
`static interface`	`VersionVector.Ordering`
`static class`	`VersionVector.Same$`
`static class`	`VersionVector.Timestamp$`	INTERNAL API

Constructor Summary

Constructors
Constructor Description

VersionVector()

Method Summary

All Methods Static Methods Instance Methods Abstract Methods Concrete Methods Deprecated Methods
Modifier and Type	Method	Description
`VersionVector`	`$colon$plus(SelfUniqueAddress node)`	Increment the version for the node passed as argument.
`boolean`	`$eq$eq(VersionVector that)`	Returns true if this VersionVector has the same history as the 'that' VersionVector else false.
`boolean`	`$greater(VersionVector that)`	Returns true if `this` is after `that` else false.
`boolean`	`$less(VersionVector that)`	Returns true if `this` is before `that` else false.
`boolean`	`$less$greater(VersionVector that)`	Returns true if `this` and `that` are concurrent else false.
`VersionVector`	`$plus(Cluster node)`	Deprecated. Use `:+` that takes a `SelfUniqueAddress` parameter instead.
`VersionVector`	`$plus(UniqueAddress node)`	INTERNAL API Increment the version for the node passed as argument.
`static VersionVector.After$`	`AfterInstance()`
`static VersionVector`	`apply()`
`static VersionVector`	`apply(UniqueAddress node, long version)`
`static VersionVector`	`apply(scala.collection.immutable.List<scala.Tuple2<UniqueAddress,java.lang.Object>> versions)`	INTERNAL API
`static VersionVector`	`apply(scala.collection.immutable.TreeMap<UniqueAddress,java.lang.Object> versions)`
`static VersionVector.Before$`	`BeforeInstance()`	Java API: The `VersionVector.Before` instance
`VersionVector.Ordering`	`compareTo(VersionVector that)`	Compare two version vectors.
`static VersionVector.Concurrent$`	`ConcurrentInstance()`	Java API: The `VersionVector.Concurrent` instance
`abstract boolean`	`contains(UniqueAddress node)`	INTERNAL API
`static VersionVector`	`create()`	Java API
`static VersionVector`	`empty()`
`VersionVector`	`increment(Cluster node)`	Deprecated. Use `increment` that takes a `SelfUniqueAddress` parameter instead.
`VersionVector`	`increment(SelfUniqueAddress node)`	Increment the version for the node passed as argument.
`abstract VersionVector`	`increment(UniqueAddress node)`	INTERNAL API Increment the version for the node passed as argument.
`abstract boolean`	`isEmpty()`
`abstract VersionVector`	`merge(VersionVector that)`	Merges this VersionVector with another VersionVector.
`abstract boolean`	`needPruningFrom(UniqueAddress removedNode)`	Does it have any state changes from a specific node, which has been removed from the cluster.
`abstract VersionVector`	`prune(UniqueAddress removedNode, UniqueAddress collapseInto)`	When the `removed` node has been removed from the cluster the state changes from that node will be pruned by collapsing the data entries to another node.
`abstract VersionVector`	`pruningCleanup(UniqueAddress removedNode)`	Remove data entries from a node that has been removed from the cluster and already been pruned.
`static VersionVector.Same$`	`SameInstance()`	Java API: The `VersionVector.Same` instance
`abstract int`	`size()`	INTERNAL API
`abstract long`	`versionAt(UniqueAddress node)`	INTERNAL API
`abstract scala.collection.Iterator<scala.Tuple2<UniqueAddress,java.lang.Object>>`	`versionsIterator()`	INTERNAL API

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface akka.cluster.ddata.RemovedNodePruning
modifiedByNodes

Methods inherited from interface akka.cluster.ddata.ReplicatedData
merge

- Constructor Detail
  - VersionVector
```
public VersionVector()
```
- Method Detail
  - empty
```
public static VersionVector empty()
```
  - apply
```
public static VersionVector apply()
```
  - apply
```
public static VersionVector apply(scala.collection.immutable.TreeMap<UniqueAddress,java.lang.Object> versions)
```
  - apply
```
public static VersionVector apply(UniqueAddress node,
                                  long version)
```
  - apply
```
public static VersionVector apply(scala.collection.immutable.List<scala.Tuple2<UniqueAddress,java.lang.Object>> versions)
```
    INTERNAL API
  - create
```
public static VersionVector create()
```
    Java API
    
    Returns:
    
    (undocumented)
  - AfterInstance
```
public static VersionVector.After$ AfterInstance()
```
  - BeforeInstance
```
public static VersionVector.Before$ BeforeInstance()
```
    Java API: The VersionVector.Before instance
    
    Returns:
    
    (undocumented)
  - SameInstance
```
public static VersionVector.Same$ SameInstance()
```
    Java API: The VersionVector.Same instance
    
    Returns:
    
    (undocumented)
  - ConcurrentInstance
```
public static VersionVector.Concurrent$ ConcurrentInstance()
```
    Java API: The VersionVector.Concurrent instance
    
    Returns:
    
    (undocumented)
  - $colon$plus
```
public VersionVector $colon$plus(SelfUniqueAddress node)
```
    Increment the version for the node passed as argument. Returns a new VersionVector.
    
    Parameters:
    
    node - (undocumented)
    
    Returns:
    
    (undocumented)
  - $plus
```
public VersionVector $plus(Cluster node)
```
    Deprecated.
    Use `:+` that takes a `SelfUniqueAddress` parameter instead. Since 2.5.20.
  - $plus
```
public VersionVector $plus(UniqueAddress node)
```
    INTERNAL API Increment the version for the node passed as argument. Returns a new VersionVector.
    
    Parameters:
    
    node - (undocumented)
    
    Returns:
    
    (undocumented)
  - increment
```
public VersionVector increment(SelfUniqueAddress node)
```
    Increment the version for the node passed as argument. Returns a new VersionVector.
    
    Parameters:
    
    node - (undocumented)
    
    Returns:
    
    (undocumented)
  - increment
```
public VersionVector increment(Cluster node)
```
    Deprecated.
    Use `increment` that takes a `SelfUniqueAddress` parameter instead. Since 2.5.20.
  - isEmpty
```
public abstract boolean isEmpty()
```
  - size
```
public abstract int size()
```
    INTERNAL API
    
    Returns:
    
    (undocumented)
  - increment
```
public abstract VersionVector increment(UniqueAddress node)
```
    INTERNAL API Increment the version for the node passed as argument. Returns a new VersionVector.
    
    Parameters:
    
    node - (undocumented)
    
    Returns:
    
    (undocumented)
  - versionAt
```
public abstract long versionAt(UniqueAddress node)
```
    INTERNAL API
    
    Parameters:
    
    node - (undocumented)
    
    Returns:
    
    (undocumented)
  - contains
```
public abstract boolean contains(UniqueAddress node)
```
    INTERNAL API
    
    Parameters:
    
    node - (undocumented)
    
    Returns:
    
    (undocumented)
  - $less$greater
```
public boolean $less$greater(VersionVector that)
```
    Returns true if this and that are concurrent else false.
    
    Parameters:
    
    that - (undocumented)
    
    Returns:
    
    (undocumented)
  - $less
```
public boolean $less(VersionVector that)
```
    Returns true if this is before that else false.
    
    Parameters:
    
    that - (undocumented)
    
    Returns:
    
    (undocumented)
  - $greater
```
public boolean $greater(VersionVector that)
```
    Returns true if this is after that else false.
    
    Parameters:
    
    that - (undocumented)
    
    Returns:
    
    (undocumented)
  - $eq$eq
```
public boolean $eq$eq(VersionVector that)
```
    Returns true if this VersionVector has the same history as the 'that' VersionVector else false.
    
    Parameters:
    
    that - (undocumented)
    
    Returns:
    
    (undocumented)
  - versionsIterator
```
public abstract scala.collection.Iterator<scala.Tuple2<UniqueAddress,java.lang.Object>> versionsIterator()
```
    INTERNAL API
    
    Returns:
    
    (undocumented)
  - compareTo
```
public VersionVector.Ordering compareTo(VersionVector that)
```
    Compare two version vectors. The outcome will be one of the following:
    
    1. Version 1 is SAME (==) as Version 2 iff for all i c1(i) == c2(i) 2. Version 1 is BEFORE (<) Version 2 iff for all i c1(i) <= c2(i) and there exist a j such that c1(j) < c2(j) 3. Version 1 is AFTER (>) Version 2 iff for all i c1(i) >= c2(i) and there exist a j such that c1(j) > c2(j). 4. Version 1 is CONCURRENT (<>) to Version 2 otherwise.
    Parameters:
    
    that - (undocumented)
    
    Returns:
    
    (undocumented)
  - merge
```
public abstract VersionVector merge(VersionVector that)
```
    Merges this VersionVector with another VersionVector. E.g. merges its versioned history.
    
    Parameters:
    
    that - (undocumented)
    
    Returns:
    
    (undocumented)
  - needPruningFrom
```
public abstract boolean needPruningFrom(UniqueAddress removedNode)
```
    Description copied from interface: RemovedNodePruning
    
    Does it have any state changes from a specific node, which has been removed from the cluster.
    
    Specified by:
    
    needPruningFrom in interface RemovedNodePruning
    
    Parameters:
    
    removedNode - (undocumented)
    
    Returns:
    
    (undocumented)
  - prune
```
public abstract VersionVector prune(UniqueAddress removedNode,
                                    UniqueAddress collapseInto)
```
    Description copied from interface: RemovedNodePruning
    
    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.
    
    Specified by:
    
    prune in interface RemovedNodePruning
    
    Parameters:
    
    removedNode - (undocumented)
    
    collapseInto - (undocumented)
    
    Returns:
    
    (undocumented)
  - pruningCleanup
```
public abstract VersionVector pruningCleanup(UniqueAddress removedNode)
```
    Description copied from interface: RemovedNodePruning
    
    Remove data entries from a node that has been removed from the cluster and already been pruned.
    
    Specified by:
    
    pruningCleanup in interface RemovedNodePruning
    
    Parameters:
    
    removedNode - (undocumented)
    
    Returns:
    
    (undocumented)

Class VersionVector

Nested Class Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Methods inherited from interface akka.cluster.ddata.RemovedNodePruning

Methods inherited from interface akka.cluster.ddata.ReplicatedData

Constructor Detail

VersionVector

Method Detail

empty

apply

apply

apply

apply

create

AfterInstance

BeforeInstance

SameInstance

ConcurrentInstance

$colon$plus

$plus

$plus

increment

increment

isEmpty

size

increment

versionAt

contains

$less$greater

$less

$greater

$eq$eq

versionsIterator

compareTo

merge

needPruningFrom

prune

pruningCleanup