org.apache.hadoop.hbase

Class AsyncMetaTableAccessor

java.lang.Object

org.apache.hadoop.hbase.AsyncMetaTableAccessor

@InterfaceAudience.Private
public class AsyncMetaTableAccessor
extends Object

The asynchronous meta table accessor. Used to read/write region and assignment information store in hbase:meta.

Constructor Summary

Constructors

Constructor and Description
AsyncMetaTableAccessor()

Method Summary

Modifier and Type	Method and Description
static CompletableFuture<Optional<HRegionLocation>>	getRegionLocation(RawAsyncTable metaTable, byte[] regionName) Returns the HRegionLocation from meta for the given region
static CompletableFuture<Optional<HRegionLocation>>	getRegionLocationWithEncodedName(RawAsyncTable metaTable, byte[] encodedRegionName) Returns the HRegionLocation from meta for the given encoded region name
static CompletableFuture<List<HRegionLocation>>	getTableHRegionLocations(RawAsyncTable metaTable, Optional<TableName> tableName) Used to get all region locations for the specific table.
static CompletableFuture<Optional<TableState>>	getTableState(RawAsyncTable metaTable, TableName tableName)
static CompletableFuture<Boolean>	tableExists(RawAsyncTable metaTable, TableName tableName)

Methods inherited from class java.lang.Object

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

Constructor Detail

AsyncMetaTableAccessor

public AsyncMetaTableAccessor()

Method Detail

tableExists

public static CompletableFuture<Boolean> tableExists(RawAsyncTable metaTable,
                                                     TableName tableName)

getTableState

public static CompletableFuture<Optional<TableState>> getTableState(RawAsyncTable metaTable,
                                                                    TableName tableName)

getRegionLocation

public static CompletableFuture<Optional<HRegionLocation>> getRegionLocation(RawAsyncTable metaTable,
                                                                             byte[] regionName)

Returns the HRegionLocation from meta for the given region

Parameters:

metaTable -

regionName - region we're looking for

Returns:

HRegionLocation for the given region

getRegionLocationWithEncodedName

public static CompletableFuture<Optional<HRegionLocation>> getRegionLocationWithEncodedName(RawAsyncTable metaTable,
                                                                                            byte[] encodedRegionName)

Returns the HRegionLocation from meta for the given encoded region name

Parameters:

metaTable -

encodedRegionName - region we're looking for

Returns:

HRegionLocation for the given region

getTableHRegionLocations

public static CompletableFuture<List<HRegionLocation>> getTableHRegionLocations(RawAsyncTable metaTable,
                                                                                Optional<TableName> tableName)

Used to get all region locations for the specific table.

Parameters:

metaTable -

tableName - table we're looking for, can be null for getting all regions

Returns:

the list of region locations. The return value will be wrapped by a CompletableFuture.