org.apache.hadoop.hbase.client

Interface AsyncRegistry

All Superinterfaces:

AutoCloseable, Closeable

All Known Implementing Classes:

ZKAsyncRegistry

@InterfaceAudience.Private
interface AsyncRegistry
extends Closeable

Implementations hold cluster information such as this cluster's id, location of hbase:meta, etc.. All stuffs that may be related to zookeeper at client side are placed here.

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<String>	getClusterId() Should only be called once.
CompletableFuture<Integer>	getCurrentNrHRS() Get the number of 'running' regionservers.
CompletableFuture<ServerName>	getMasterAddress() Get the address of HMaster.
CompletableFuture<Integer>	getMasterInfoPort() Get the info port of HMaster.
CompletableFuture<RegionLocations>	getMetaRegionLocation() Get the location of meta region.

Method Detail

getMetaRegionLocation

CompletableFuture<RegionLocations> getMetaRegionLocation()

Get the location of meta region.

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.

getCurrentNrHRS

CompletableFuture<Integer> getCurrentNrHRS()

Get the number of 'running' regionservers.

getMasterAddress

CompletableFuture<ServerName> getMasterAddress()

Get the address of HMaster.

getMasterInfoPort

CompletableFuture<Integer> getMasterInfoPort()

Get the info port of HMaster.

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