Package org.gridgain.internal.snapshots

Class SnapshotUtils

java.lang.Object

org.gridgain.internal.snapshots.SnapshotUtils

public class SnapshotUtils
extends Object

Utils to work with GridGain snapshots.

Constructor Summary

Constructors

Constructor	Description
SnapshotUtils()

Method Summary

Modifier and Type	Method	Description
static CompletableFuture<Void>	awaitPrimaryReplicas(SnapshotManagerContext context, Collection<org.apache.ignite.internal.catalog.descriptors.CatalogTableDescriptor> tableDescriptors, org.apache.ignite.internal.catalog.Catalog catalog)	Returns a future that gets completed when primary replicas for all partitions of all zones, participating in the snapshot operation, are available.
static boolean	isMissing(org.apache.ignite.internal.metastorage.Entry entry)	Checks if the entry is missing.
static void	retainTablesAndStructures(SnapshotMeta snapshotMeta, Set<org.apache.ignite.table.QualifiedName> tableNames, Set<org.apache.ignite.table.QualifiedName> structures)	Retains in snapshot meta only information about specified tables and structures.
static Set<org.apache.ignite.table.QualifiedName>	sequencesUsedByTables(Collection<TableSnapshotMeta> tables)	Returns sequences used by the given tables.
static List<org.apache.ignite.internal.catalog.descriptors.CatalogTableDescriptor>	tempTableDescriptors(SnapshotMeta snapshotMeta, UUID operationId, org.apache.ignite.internal.catalog.Catalog catalog)	Returns descriptors of the tables created during given snapshot RESTORE operation from the catalog.

Methods inherited from class java.lang.Object

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

Constructor Details

SnapshotUtils

public SnapshotUtils()

Method Details

retainTablesAndStructures

public static void retainTablesAndStructures(SnapshotMeta snapshotMeta,
 Set<org.apache.ignite.table.QualifiedName> tableNames,
 Set<org.apache.ignite.table.QualifiedName> structures)

Retains in snapshot meta only information about specified tables and structures.

Parameters:

snapshotMeta - Meta to modify.

tableNames - Names of the tables to retain in the meta.

structures - Names of the structures (maps, sequences) to retain in the meta.

sequencesUsedByTables

public static Set<org.apache.ignite.table.QualifiedName> sequencesUsedByTables(Collection<TableSnapshotMeta> tables)

Returns sequences used by the given tables.

isMissing

public static boolean isMissing(org.apache.ignite.internal.metastorage.Entry entry)

Checks if the entry is missing.

Parameters:

entry - Entry to check.

Returns:

true if the entry is absent or has no value, false otherwise.

tempTableDescriptors

public static List<org.apache.ignite.internal.catalog.descriptors.CatalogTableDescriptor> tempTableDescriptors(SnapshotMeta snapshotMeta,
 UUID operationId,
 org.apache.ignite.internal.catalog.Catalog catalog)

Returns descriptors of the tables created during given snapshot RESTORE operation from the catalog. Until the restoration is completed, they have SnapshotManager.tmpTableNamePrefix(UUID).

awaitPrimaryReplicas

public static CompletableFuture<Void> awaitPrimaryReplicas(SnapshotManagerContext context,
 Collection<org.apache.ignite.internal.catalog.descriptors.CatalogTableDescriptor> tableDescriptors,
 org.apache.ignite.internal.catalog.Catalog catalog)

Returns a future that gets completed when primary replicas for all partitions of all zones, participating in the snapshot operation, are available.

This is needed to make sure that the initial target zones' rebalance has been completed and therefore their stable assignments exist which we can then use to compute partitions that are hosted on this node.

See Also:

• PartitionsCalculator