org.apache.ignite.internal.processors.cache.mvcc

Interface MvccSnapshot

All Superinterfaces:

Comparable<MvccVersion>, Message, MvccVersion, Serializable

All Known Implementing Classes:

MvccSnapshotResponse, MvccSnapshotWithoutTxs

public interface MvccSnapshot
extends MvccVersion, Message

MVCC snapshot which holds the following information: - Current MVCC version which should be used for visibility checks - List of active transactions which should not be visible to current transaction - Cleanup version which is used to help vacuum process.

Field Summary

Fields inherited from interface org.apache.ignite.plugin.extensions.communication.Message

DIRECT_TYPE_SIZE

Method Summary

Modifier and Type	Method and Description
MvccLongList	activeTransactions()
long	cleanupVersion()
void	incrementOperationCounter() Increments operation counter.
MvccSnapshot	withoutActiveTransactions()

Methods inherited from interface org.apache.ignite.internal.processors.cache.mvcc.MvccVersion

compareTo, coordinatorVersion, counter, operationCounter

Methods inherited from interface org.apache.ignite.plugin.extensions.communication.Message

directType, fieldsCount, onAckReceived, readFrom, writeTo

Method Detail

activeTransactions

MvccLongList activeTransactions()

Returns:

Active transactions.

cleanupVersion

long cleanupVersion()

Returns:

Cleanup version (all smaller versions are safe to remove).

withoutActiveTransactions

MvccSnapshot withoutActiveTransactions()

Returns:

Version without active transactions.

incrementOperationCounter

void incrementOperationCounter()

Increments operation counter.