org.apache.hadoop.hbase.master

Class TableNamespaceManager

java.lang.Object

org.apache.hadoop.hbase.master.TableNamespaceManager

@InterfaceAudience.Private
public class TableNamespaceManager
extends Object

This is a helper class used to manage the namespace metadata that is stored in TableName.NAMESPACE_TABLE_NAME It also mirrors updates to the ZK store by forwarding updates to ZKNamespaceManager

Constructor Summary

Constructors

Constructor and Description
TableNamespaceManager(MasterServices masterServices)

Method Summary

Methods

Modifier and Type	Method and Description
void	create(NamespaceDescriptor ns)
NamespaceDescriptor	get(String name)
boolean	isTableAvailableAndInitialized() This method checks if the namespace table is assigned and then tries to create its HTable.
NavigableSet<NamespaceDescriptor>	list()
void	remove(String name)
void	start()
void	update(NamespaceDescriptor ns)

Methods inherited from class java.lang.Object

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

Constructor Detail

TableNamespaceManager

public TableNamespaceManager(MasterServices masterServices)

Method Detail

start

public void start()
           throws IOException

Throws:

IOException

get

public NamespaceDescriptor get(String name)
                        throws IOException

Throws:

IOException

create

public void create(NamespaceDescriptor ns)
            throws IOException

Throws:

IOException

update

public void update(NamespaceDescriptor ns)
            throws IOException

Throws:

IOException

remove

public void remove(String name)
            throws IOException

Throws:

IOException

list

public NavigableSet<NamespaceDescriptor> list()
                                       throws IOException

Throws:

IOException

isTableAvailableAndInitialized

public boolean isTableAvailableAndInitialized()
                                       throws IOException

This method checks if the namespace table is assigned and then tries to create its HTable. If it was already created before, it also makes sure that the connection isn't closed.

Returns:

true if the namespace table manager is ready to serve, false otherwise

Throws:

IOException