pt.unl.fct.di.novasys.babel.crdts.state.utils

Class VVContext

java.lang.Object

pt.unl.fct.di.novasys.babel.crdts.state.utils.VVContext

All Implemented Interfaces:

VVState, GenericReplicaState

Direct Known Subclasses:

CausalContext

public class VVContext
extends Object
implements VVState

Field Summary

Fields

Modifier and Type	Field and Description
protected ReplicaID	replicaID
protected VersionVector	vv

Constructor Summary

Constructors

Constructor and Description
VVContext(ReplicaID replicaID) Creates a simple replica state.

Method Summary

Modifier and Type	Method and Description
ReplicaID	getReplicaID()
VersionVector	getVV() Gets the version vector stored in the state.
VersionVector	getVVCopy() Gets a copy of the version vector stored in the state.
Integer	getVVEntry(ReplicaID otherReplicaID)
Timestamp	incClock() Increments the "clock" of the replica (i.e., increments the specific entry of the replica in question) by generating a new timestamp
void	mergeTs(Timestamp ts) Method called when merging the state with other replica.
void	updateTs(Timestamp ts) Updates the replica's version vector with a given timestamp.
void	updateVV(VersionVector vv) Updates the replica's version vector with a given version vector.

Methods inherited from class java.lang.Object

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

Field Detail

replicaID

protected ReplicaID replicaID

vv

protected VersionVector vv

Constructor Detail

VVContext

public VVContext(ReplicaID replicaID)

Creates a simple replica state. Creates a new version vector accordingly.

Parameters:

replicaID - the replica identifier

Method Detail

getReplicaID

public ReplicaID getReplicaID()

Specified by:

getReplicaID in interface GenericReplicaState

getVVEntry

public Integer getVVEntry(ReplicaID otherReplicaID)

Specified by:

getVVEntry in interface VVState

getVV

public VersionVector getVV()

Description copied from interface: VVState

Gets the version vector stored in the state.

Specified by:

getVV in interface VVState

Returns:

the version vector

getVVCopy

public VersionVector getVVCopy()

Description copied from interface: VVState

Gets a copy of the version vector stored in the state.

Specified by:

getVVCopy in interface VVState

Returns:

the version vector

incClock

public Timestamp incClock()

Description copied from interface: VVState

Increments the "clock" of the replica (i.e., increments the specific entry of the replica in question) by generating a new timestamp

Specified by:

incClock in interface VVState

Returns:

the newly created timestamp

updateTs

public void updateTs(Timestamp ts)

Description copied from interface: VVState

Updates the replica's version vector with a given timestamp. The update only occurs if the timestamp is superior to the entry of the replica.

Specified by:

updateTs in interface VVState

Parameters:

ts - the timestamp to integrate into the version vector.

updateVV

public void updateVV(VersionVector vv)

Description copied from interface: VVState

Updates the replica's version vector with a given version vector. The update only occurs if the any of the entries are superior to replica own entries.

Specified by:

updateVV in interface VVState

Parameters:

vv - the version vector received.

mergeTs

public void mergeTs(Timestamp ts)

Description copied from interface: VVState

Method called when merging the state with other replica. It acts as a wrapper to updateTs when the argument passed is not a null.

Specified by:

mergeTs in interface VVState

Parameters:

ts - the timestamp to update.