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
private ConcurrentMap<String,NamespaceDescriptor>	cache
(package private) static int	DEFAULT_NS_INIT_TIMEOUT
static String	KEY_MAX_REGIONS
static String	KEY_MAX_TABLES
private MasterServices	masterServices
(package private) static String	NS_INIT_TIMEOUT

Constructor Summary

Constructors

Constructor and Description
TableNamespaceManager(MasterServices masterServices)

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()
private void	loadNamespaceIntoCache()
private void	migrateNamespaceTable()
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

NS_INIT_TIMEOUT

static final String NS_INIT_TIMEOUT

See Also:

Constant Field Values

DEFAULT_NS_INIT_TIMEOUT

static final int DEFAULT_NS_INIT_TIMEOUT

See Also:

Constant Field Values

cache

private final ConcurrentMap<String,NamespaceDescriptor> cache

masterServices

private final MasterServices masterServices

Constructor Detail

TableNamespaceManager

TableNamespaceManager(MasterServices masterServices)

Method Detail

migrateNamespaceTable

private void migrateNamespaceTable()
                            throws IOException

Throws:

IOException

loadNamespaceIntoCache

private void loadNamespaceIntoCache()
                             throws IOException

Throws:

IOException

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