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 internally to manage the namespace metadata that is stored in the ns family in meta table.

Field Summary

Fields

Modifier and Type	Field and Description
static String	KEY_MAX_REGIONS
static String	KEY_MAX_TABLES

Method Summary

Modifier and Type	Method and Description
void	addOrUpdateNamespace(NamespaceDescriptor ns)
void	deleteNamespace(String namespaceName)
boolean	doesNamespaceExist(String namespaceName) check whether a namespace has already existed.
NamespaceDescriptor	get(String name)
static long	getMaxRegions(NamespaceDescriptor ns)
static long	getMaxTables(NamespaceDescriptor ns)
static void	insertNamespaceToMeta(Connection conn, NamespaceDescriptor ns)
List<NamespaceDescriptor>	list()
void	start()
void	validateTableAndRegionCount(NamespaceDescriptor desc)

Methods inherited from class java.lang.Object

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

Field Detail

KEY_MAX_REGIONS

public static final String KEY_MAX_REGIONS

See Also:

Constant Field Values

KEY_MAX_TABLES

public static final String KEY_MAX_TABLES

See Also:

Constant Field Values

Method Detail

start

public void start()
           throws IOException

Throws:

IOException

doesNamespaceExist

public boolean doesNamespaceExist(String namespaceName)
                           throws IOException

check whether a namespace has already existed.

Throws:

IOException

get

public NamespaceDescriptor get(String name)
                        throws IOException

Throws:

IOException

addOrUpdateNamespace

public void addOrUpdateNamespace(NamespaceDescriptor ns)
                          throws IOException

Throws:

IOException

insertNamespaceToMeta

public static void insertNamespaceToMeta(Connection conn,
                                         NamespaceDescriptor ns)
                                  throws IOException

Throws:

IOException

deleteNamespace

public void deleteNamespace(String namespaceName)
                     throws IOException

Throws:

IOException

list

public List<NamespaceDescriptor> list()
                               throws IOException

Throws:

IOException

validateTableAndRegionCount

public void validateTableAndRegionCount(NamespaceDescriptor desc)
                                 throws IOException

Throws:

IOException

getMaxTables

public static long getMaxTables(NamespaceDescriptor ns)
                         throws IOException

Throws:

IOException

getMaxRegions

public static long getMaxRegions(NamespaceDescriptor ns)
                          throws IOException

Throws:

IOException