Package com.illumon.iris.db.v2.locations.local

Class TableLocationMetadataIndex

java.lang.Object

com.illumon.iris.db.v2.locations.local.TableLocationMetadataIndex

public class TableLocationMetadataIndex
extends Object

Table location metadata index support, in order to avoid depending on filesystem metadata caching for performance where possible.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static interface	TableLocationMetadataIndex.LocationSnapshot	Independent of the key, we should know our format, size, last modified time, and column version.
static final class	TableLocationMetadataIndex.TableLocationSnapshot	Immutable snapshot of a table location, providing access to all key and state fields, constructed using a consistent copy of the state fields.

Field Summary

Fields

Modifier and Type	Field	Description
static final int	CURRENT_VERSION
static final int	FIRST_SUPPORTED_VERSION

Constructor Summary

Constructors

Constructor	Description
TableLocationMetadataIndex(TableLocationMetadataIndex.TableLocationSnapshot[] tableLocationSnapshots)	Internal-only constructor from an array of snapshots.

Method Summary

Modifier and Type	Method	Description
TableLocationMetadataIndex.TableLocationSnapshot	getTableLocationSnapshot(TableLocationKey tableLocationKey)	Get the TableLocationMetadataIndex.TableLocationSnapshot for the specified TableLocationKey if it exists.
Collection<TableLocationMetadataIndex.TableLocationSnapshot>	getTableLocationSnapshots()	Get all TableLocationMetadataIndex.TableLocationSnapshots for this index.

Methods inherited from class java.lang.Object

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

Field Details

FIRST_SUPPORTED_VERSION

public static final int FIRST_SUPPORTED_VERSION

See Also:

• Constant Field Values

CURRENT_VERSION

public static final int CURRENT_VERSION

See Also:

• Constant Field Values

Constructor Details

TableLocationMetadataIndex

@VisibleForTesting
public TableLocationMetadataIndex(@NotNull
 TableLocationMetadataIndex.TableLocationSnapshot[] tableLocationSnapshots)

Internal-only constructor from an array of snapshots.

Parameters:

tableLocationSnapshots - The array of snapshots

Method Details

getTableLocationSnapshots

public Collection<TableLocationMetadataIndex.TableLocationSnapshot> getTableLocationSnapshots()

Get all TableLocationMetadataIndex.TableLocationSnapshots for this index.

Returns:

The snapshots

getTableLocationSnapshot

public TableLocationMetadataIndex.TableLocationSnapshot getTableLocationSnapshot(@NotNull
 TableLocationKey tableLocationKey)

Get the TableLocationMetadataIndex.TableLocationSnapshot for the specified TableLocationKey if it exists.

Parameters:

tableLocationKey - The location key

Returns:

The snapshot if it exists, else null