Package org.apache.hadoop.hbase.master

Class TableNamespaceManager

java.lang.Object

org.apache.hadoop.hbase.master.TableNamespaceManager

@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	Description
private final ConcurrentMap<String,NamespaceDescriptor>	cache
(package private) static final int	DEFAULT_NS_INIT_TIMEOUT
static final String	KEY_MAX_REGIONS
static final String	KEY_MAX_TABLES
private final MasterServices	masterServices
private boolean	migrationDone
(package private) static final String	NS_INIT_TIMEOUT

Constructor Summary

Constructors

Constructor	Description
TableNamespaceManager(MasterServices masterServices)

Method Summary

Modifier and Type	Method	Description
void	addOrUpdateNamespace(NamespaceDescriptor ns)
private void	addToCache(Result result, byte[] family, byte[] qualifier)
private void	checkMigrationDone()
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	loadFromMeta()
private void	loadFromNamespace()
private void	loadNamespaceIntoCache()
void	setMigrationDone()
private boolean	shouldLoadFromMeta()
void	start()
private void	tryMigrateNamespaceTable()
void	validateTableAndRegionCount(NamespaceDescriptor desc)

Methods inherited from class java.lang.Object

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

Field Details

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

migrationDone

private volatile boolean migrationDone

Constructor Details

TableNamespaceManager

TableNamespaceManager(MasterServices masterServices)

Method Details

tryMigrateNamespaceTable

private void tryMigrateNamespaceTable()
                               throws IOException,
InterruptedException

Throws:

IOException

InterruptedException

addToCache

private void addToCache(Result result,
 byte[] family,
 byte[] qualifier)
                 throws IOException

Throws:

IOException

loadFromMeta

private void loadFromMeta()
                   throws IOException

Throws:

IOException

loadFromNamespace

private void loadFromNamespace()
                        throws IOException

Throws:

IOException

shouldLoadFromMeta

private boolean shouldLoadFromMeta()
                            throws IOException

Throws:

IOException

loadNamespaceIntoCache

private void loadNamespaceIntoCache()
                             throws IOException

Throws:

IOException

start

public void start()
           throws IOException,
InterruptedException

Throws:

IOException

InterruptedException

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

checkMigrationDone

private void checkMigrationDone()
                         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

setMigrationDone

public void setMigrationDone()

getMaxTables

public static long getMaxTables(NamespaceDescriptor ns)
                         throws IOException

Throws:

IOException

getMaxRegions

public static long getMaxRegions(NamespaceDescriptor ns)
                          throws IOException

Throws:

IOException