org.apache.ignite.cache

Interface CacheEntryVersion

All Superinterfaces:

Comparable<CacheEntryVersion>, Serializable

public interface CacheEntryVersion
extends Comparable<CacheEntryVersion>, Serializable

Entry event order. Two concurrent updates of the same entry can be ordered based on CacheEntryVersion comparsion. Greater value means that event occurs later.

See Also:

CacheConflictResolutionManager, GridCacheVersionManager.dataCenterId(byte)

Method Summary

Modifier and Type	Method and Description
byte	clusterId() Cluster id is a value to distinguish updates in case user wants to aggregate and sort updates from several Ignite clusters.
int	nodeOrder()
long	order() Order of the update.
CacheEntryVersion	otherClusterVersion() If source of the update is "local" cluster then null will be returned.
int	topologyVersion()

Methods inherited from interface java.lang.Comparable

compareTo

Method Detail

order

long order()

Order of the update. Value is an incremental counter value. Scope of counter is node.

Returns:

Version order.

nodeOrder

int nodeOrder()

Returns:

Node order on which this version was assigned.

clusterId

byte clusterId()

Cluster id is a value to distinguish updates in case user wants to aggregate and sort updates from several Ignite clusters. clusterId id can be set for the node using GridCacheVersionManager.dataCenterId(byte).

Returns:

Cluster id.

topologyVersion

int topologyVersion()

Returns:

Topology version plus number of seconds from the start time of the first grid node.

otherClusterVersion

CacheEntryVersion otherClusterVersion()

If source of the update is "local" cluster then null will be returned. If updated comes from the other cluster using IgniteInternalCache.putAllConflict(Map) then entry version for other cluster.

Returns:

Replication version.

See Also:

IgniteInternalCache.putAllConflict(Map), IgniteInternalCache.removeAllConflict(Map)