org.apache.hadoop.hbase.client

Interface ConnectionRegistry

All Superinterfaces:

AutoCloseable, Closeable

All Known Implementing Classes:

AbstractRpcBasedConnectionRegistry, MasterRegistry, RegionServerRegistry, RpcConnectionRegistry, ZKConnectionRegistry

@InterfaceAudience.Private
public interface ConnectionRegistry
extends Closeable

Registry for meta information needed for connection setup to a HBase cluster. Implementations hold cluster information such as this cluster's id, location of hbase:meta, etc.. Internal use only.

Method Summary

Modifier and Type	Method and Description
void	close() Closes this instance and releases any system resources associated with it
CompletableFuture<ServerName>	getActiveMaster() Get the address of active HMaster.
CompletableFuture<String>	getClusterId() Should only be called once.
String	getConnectionString() Return the connection string associated with this registry instance.
CompletableFuture<RegionLocations>	getMetaRegionLocations() Get the location of meta region(s).

Method Detail

getMetaRegionLocations

CompletableFuture<RegionLocations> getMetaRegionLocations()

Get the location of meta region(s).

getClusterId

CompletableFuture<String> getClusterId()

Should only be called once.

The upper layer should store this value somewhere as it will not be change any more.

getActiveMaster

CompletableFuture<ServerName> getActiveMaster()

Get the address of active HMaster.

getConnectionString

String getConnectionString()

Return the connection string associated with this registry instance. This value is informational, used for annotating traces. Values returned may not be valid for establishing a working cluster connection.

close

void close()

Closes this instance and releases any system resources associated with it

Specified by:

close in interface AutoCloseable

Specified by:

close in interface Closeable