org.apache.hadoop.hbase.client

Interface CatalogReplicaLoadBalanceSelector

All Known Implementing Classes:

CatalogReplicaLoadBalanceSimpleSelector

@InterfaceAudience.Private
interface CatalogReplicaLoadBalanceSelector

A Catalog replica selector decides which catalog replica to go for read requests when it is configured as CatalogReplicaMode.LoadBalance.

Field Summary

Fields

Modifier and Type	Field and Description
static int	UNINITIALIZED_NUM_OF_REPLICAS

Method Summary

Modifier and Type	Method and Description
void	onError(HRegionLocation loc) This method is called when input location is stale, i.e, when clients run into org.apache.hadoop.hbase.NotServingRegionException.
int	select(TableName tablename, byte[] row, RegionLocateType locateType) Select a catalog replica region where client go to loop up the input row key.

Field Detail

UNINITIALIZED_NUM_OF_REPLICAS

static final int UNINITIALIZED_NUM_OF_REPLICAS

See Also:

Constant Field Values

Method Detail

onError

void onError(HRegionLocation loc)

This method is called when input location is stale, i.e, when clients run into org.apache.hadoop.hbase.NotServingRegionException.

Parameters:

loc - stale location

select

int select(TableName tablename,
           byte[] row,
           RegionLocateType locateType)

Select a catalog replica region where client go to loop up the input row key.

Parameters:

tablename - table name

row - key to look up

locateType - locate type

Returns:

replica id