org.apache.hadoop.hbase

Interface TableDescriptors

All Known Implementing Classes:

FSTableDescriptors

@InterfaceAudience.Private
public interface TableDescriptors

Get, remove and modify table descriptors. Used by servers to host descriptors.

Method Summary

Methods

Modifier and Type	Method and Description
void	add(HTableDescriptor htd) Add or update descriptor
HTableDescriptor	get(TableName tableName)
Map<String,HTableDescriptor>	getAll() Get Map of all HTableDescriptors.
Map<String,HTableDescriptor>	getByNamespace(String name) Get Map of all NamespaceDescriptors for a given namespace.
HTableDescriptor	remove(TableName tablename)
void	setCacheOff() Disables the tabledescriptor cache
void	setCacheOn() Enables the tabledescriptor cache

Method Detail

get

HTableDescriptor get(TableName tableName)
                     throws IOException

Parameters:

tableName -

Returns:

HTableDescriptor for tablename

Throws:

IOException

getByNamespace

Map<String,HTableDescriptor> getByNamespace(String name)
                                            throws IOException

Get Map of all NamespaceDescriptors for a given namespace.

Returns:

Map of all descriptors.

Throws:

IOException

getAll

Map<String,HTableDescriptor> getAll()
                                    throws IOException

Get Map of all HTableDescriptors. Populates the descriptor cache as a side effect.

Returns:

Map of all descriptors.

Throws:

IOException

add

void add(HTableDescriptor htd)
         throws IOException

Add or update descriptor

Parameters:

htd - Descriptor to set into TableDescriptors

Throws:

IOException

remove

HTableDescriptor remove(TableName tablename)
                        throws IOException

Parameters:

tablename -

Returns:

Instance of table descriptor or null if none found.

Throws:

IOException

setCacheOn

void setCacheOn()
                throws IOException

Enables the tabledescriptor cache

Throws:

IOException

setCacheOff

void setCacheOff()
                 throws IOException

Disables the tabledescriptor cache

Throws:

IOException