Package org.apache.pekko.cluster.ddata

Class GSet<A>

java.lang.Object

org.apache.pekko.cluster.ddata.GSet<A>

All Implemented Interfaces:

java.io.Serializable, DeltaReplicatedData, FastMerge, ReplicatedData, ReplicatedDataSerialization, ReplicatedDelta, scala.Equals, scala.Product

public final class GSet<A>
extends java.lang.Object
implements DeltaReplicatedData, ReplicatedDelta, ReplicatedDataSerialization, FastMerge, scala.Product, java.io.Serializable

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor	Description
GSet()

Method Summary

Modifier and Type	Method	Description
GSet<A>	$plus(A element)	Adds an element to the set
GSet<A>	add(A element)	Adds an element to the set
static GSet<java.lang.Object>	apply()
static <A> GSet<A>	apply(scala.collection.immutable.Set<A> elements, scala.Option<GSet<A>> delta)	Implements a 'Add Set' CRDT, also called a 'G-Set'.
boolean	canEqual(java.lang.Object x$1)
boolean	contains(A a)
GSet<A>	copy(scala.collection.immutable.Set<A> e)
static <A> GSet<A>	create()	Java API
scala.Option<GSet<A>>	delta()	The accumulated delta of mutator operations since previous DeltaReplicatedData.resetDelta().
scala.collection.immutable.Set<A>	elements()
static <A> GSet<A>	empty()
boolean	equals(java.lang.Object x$1)
java.util.Set<A>	getElements()	Java API
int	hashCode()
boolean	isEmpty()
GSet<A>	merge(GSet<A> that)
GSet<A>	mergeDelta(GSet<A> thatDelta)
int	productArity()
java.lang.Object	productElement(int x$1)
java.lang.String	productElementName(int x$1)
scala.collection.Iterator<java.lang.Object>	productIterator()
java.lang.String	productPrefix()
GSet<A>	resetDelta()	Reset collection of deltas from mutator operations.
int	size()
java.lang.String	toString()
static <A> scala.Option<scala.collection.immutable.Set<A>>	unapply(GSet<A> x$0)
GSet<A>	zero()	The empty full state.

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface org.apache.pekko.cluster.ddata.DeltaReplicatedData

mergeDelta

Methods inherited from interface org.apache.pekko.cluster.ddata.FastMerge

ancestor_$eq, assignAncestor, clearAncestor, isAncestorOf

Methods inherited from interface scala.Product

productElementNames

Methods inherited from interface org.apache.pekko.cluster.ddata.ReplicatedData

merge

Constructor Detail

GSet

public GSet()

Method Detail

empty

public static <A> GSet<A> empty()

apply

public static GSet<java.lang.Object> apply()

create

public static <A> GSet<A> create()

Java API

apply

public static <A> GSet<A> apply(scala.collection.immutable.Set<A> elements,
                                scala.Option<GSet<A>> delta)

Implements a 'Add Set' CRDT, also called a 'G-Set'. You can't remove elements of a G-Set.

It is described in the paper A comprehensive study of Convergent and Commutative Replicated Data Types.

A G-Set doesn't accumulate any garbage apart from the elements themselves.

This class is immutable, i.e. "modifying" methods return a new instance.

unapply

public static <A> scala.Option<scala.collection.immutable.Set<A>> unapply(GSet<A> x$0)

elements

public scala.collection.immutable.Set<A> elements()

delta

public scala.Option<GSet<A>> delta()

Description copied from interface: DeltaReplicatedData

The accumulated delta of mutator operations since previous DeltaReplicatedData.resetDelta(). When the Replicator invokes the modify function of the Update message and the user code is invoking one or more mutator operations the data is collecting the delta of the operations and makes it available for the Replicator with the DeltaReplicatedData.delta() accessor. The modify function shall still return the full state in the same way as ReplicatedData without support for deltas.

Specified by:

delta in interface DeltaReplicatedData

getElements

public java.util.Set<A> getElements()

Java API

contains

public boolean contains(A a)

isEmpty

public boolean isEmpty()

size

public int size()

$plus

public GSet<A> $plus(A element)

Adds an element to the set

add

public GSet<A> add(A element)

Adds an element to the set

merge

public GSet<A> merge(GSet<A> that)

mergeDelta

public GSet<A> mergeDelta(GSet<A> thatDelta)

zero

public GSet<A> zero()

Description copied from interface: ReplicatedDelta

The empty full state. This is used when a delta is received and no existing full state exists on the receiving side. Then the delta is merged into the zero to create the initial full state.

Specified by:

zero in interface ReplicatedDelta

resetDelta

public GSet<A> resetDelta()

Description copied from interface: DeltaReplicatedData

Reset collection of deltas from mutator operations. When the Replicator invokes the modify function of the Update message the delta is always "reset" and when the user code is invoking one or more mutator operations the data is collecting the delta of the operations and makes it available for the Replicator with the DeltaReplicatedData.delta() accessor. When the Replicator has grabbed the delta it will invoke this method to get a clean data instance without the delta.

Specified by:

resetDelta in interface DeltaReplicatedData

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

copy

public GSet<A> copy(scala.collection.immutable.Set<A> e)

productPrefix

public java.lang.String productPrefix()

Specified by:

productPrefix in interface scala.Product

productArity

public int productArity()

Specified by:

productArity in interface scala.Product

productElement

public java.lang.Object productElement(int x$1)

Specified by:

productElement in interface scala.Product

productIterator

public scala.collection.Iterator<java.lang.Object> productIterator()

Specified by:

productIterator in interface scala.Product

canEqual

public boolean canEqual(java.lang.Object x$1)

Specified by:

canEqual in interface scala.Equals

productElementName

public java.lang.String productElementName(int x$1)

Specified by:

productElementName in interface scala.Product

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object

equals

public boolean equals(java.lang.Object x$1)

Specified by:

equals in interface scala.Equals

Overrides:

equals in class java.lang.Object