org.apache.hadoop.hbase.client

Class MasterRegistry

java.lang.Object

org.apache.hadoop.hbase.client.MasterRegistry

@InterfaceAudience.Private
public class MasterRegistry
extends Object

Master based registry implementation. Makes RPCs to the configured master addresses from config "hbase.masters". All the registry methods are blocking unlike implementations in other branches.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
protected static interface	MasterRegistry.Callable<T extends com.google.protobuf.Message>

Field Summary

Fields

Modifier and Type	Field and Description
protected MasterAddressRefresher	masterAddressRefresher

Constructor Summary

Constructors

Constructor and Description
MasterRegistry()

Method Summary

Methods

Modifier and Type	Method and Description
void	close() Cleanup state, if any.
protected <T extends com.google.protobuf.Message> T	doCall(MasterRegistry.Callable<T> callable)
ServerName	getActiveMaster()
String	getClusterId()
int	getCurrentNrHRS()
static String	getMasterAddr(org.apache.hadoop.conf.Configuration conf) Builds the default master address end point if it is not specified in the configuration.
RegionLocations	getMetaRegionLocations()
void	init(Connection connection)
static Set<ServerName>	parseMasterAddrs(org.apache.hadoop.conf.Configuration conf) Parses the list of master addresses from the provided configuration.

Methods inherited from class java.lang.Object

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

Field Detail

masterAddressRefresher

protected MasterAddressRefresher masterAddressRefresher

Constructor Detail

MasterRegistry

public MasterRegistry()

Method Detail

init

public void init(Connection connection)
          throws IOException

Throws:

IOException

doCall

protected <T extends com.google.protobuf.Message> T doCall(MasterRegistry.Callable<T> callable)
                                                throws MasterRegistryFetchException

Throws:

MasterRegistryFetchException

getActiveMaster

public ServerName getActiveMaster()
                           throws IOException

Returns:

the currently active master, null if none exists.

Throws:

IOException

getMetaRegionLocations

public RegionLocations getMetaRegionLocations()
                                       throws IOException

Returns:

Meta region location

Throws:

IOException

getClusterId

public String getClusterId()
                    throws IOException

Returns:

Cluster id.

Throws:

IOException

getCurrentNrHRS

public int getCurrentNrHRS()
                    throws IOException

Returns:

Count of 'running' regionservers

Throws:

IOException

close

public void close()

Cleanup state, if any.

parseMasterAddrs

@InterfaceAudience.Private
public static Set<ServerName> parseMasterAddrs(org.apache.hadoop.conf.Configuration conf)
                                        throws UnknownHostException

Parses the list of master addresses from the provided configuration. Supported format is comma separated host[:port] values. If no port number if specified, default master port is assumed.

Parameters:

conf - Configuration to parse from.

Throws:

UnknownHostException

getMasterAddr

@InterfaceAudience.Private
public static String getMasterAddr(org.apache.hadoop.conf.Configuration conf)
                            throws UnknownHostException

Builds the default master address end point if it is not specified in the configuration.

Will be called in HBaseTestingUtility.

Throws:

UnknownHostException