pt.unl.fct.di.novasys.babel.crdts.delta.generic

Class DeltaBasedCRDT

java.lang.Object

pt.unl.fct.di.novasys.babel.crdts.generic.CRDT

pt.unl.fct.di.novasys.babel.crdts.delta.generic.DeltaBasedCRDT

All Implemented Interfaces:

DeltaCRDT, GenericCRDT

Direct Known Subclasses:

DeltaCausalBasedCRDT, DeltaCRDTLWWMap, DeltaLWWCRDTMap, DeltaLWWMap, DeltaLWWRegister, DeltaLWWSet, DeltaMVMap, DeltaPNCounter, DeltaRGA

public abstract class DeltaBasedCRDT
extends CRDT
implements DeltaCRDT

Field Summary

Fields

Modifier and Type	Field and Description
protected VVState	state

Fields inherited from class pt.unl.fct.di.novasys.babel.crdts.generic.CRDT

type

Constructor Summary

Constructors

Constructor and Description
DeltaBasedCRDT(CRDTsTypes type, ReplicaID replicaID)
DeltaBasedCRDT(CRDTsTypes type, VVState state)

Method Summary

Modifier and Type	Method and Description
abstract DeltaBasedCRDT	generateDelta(VersionVector vv) Calculates a delta from a given version for the current state
ReplicaID	getReplicaID() Gets the replica identifier
VVState	getReplicaState() Gets the replica state.
abstract DeltaBasedCRDT	mergeDelta(DeltaBasedCRDT delta) Applies a delta to the current state.

Methods inherited from class pt.unl.fct.di.novasys.babel.crdts.generic.CRDT

getType

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface pt.unl.fct.di.novasys.babel.crdts.generic.GenericCRDT

copy, deserializeDataType, getType, serialize

Field Detail

state

protected VVState state

Constructor Detail

DeltaBasedCRDT

public DeltaBasedCRDT(CRDTsTypes type,
                      VVState state)

DeltaBasedCRDT

public DeltaBasedCRDT(CRDTsTypes type,
                      ReplicaID replicaID)

Method Detail

getReplicaID

public ReplicaID getReplicaID()

Description copied from interface: DeltaCRDT

Gets the replica identifier

Specified by:

getReplicaID in interface DeltaCRDT

Returns:

the replica identifier.

getReplicaState

public VVState getReplicaState()

Description copied from interface: DeltaCRDT

Gets the replica state. At the moment this state stores the replica identifier and a version vector to handle causal context.

Specified by:

getReplicaState in interface DeltaCRDT

Returns:

the replica state

generateDelta

public abstract DeltaBasedCRDT generateDelta(VersionVector vv)

Description copied from interface: DeltaCRDT

Calculates a delta from a given version for the current state

Specified by:

generateDelta in interface DeltaCRDT

Parameters:

vv - a version version to calculate the delta from

Returns:

a delta for the current state

mergeDelta

public abstract DeltaBasedCRDT mergeDelta(DeltaBasedCRDT delta)

Description copied from interface: DeltaCRDT

Applies a delta to the current state. This method is analogous to a merge of states

Specified by:

mergeDelta in interface DeltaCRDT

Parameters:

delta - a crdt representing the delta

Returns:

the current state