co.cask.cdap.data2.util.hbase

Class HTableNameConverter

java.lang.Object

co.cask.cdap.data2.util.hbase.HTableNameConverter

public abstract class HTableNameConverter
extends Object

Common utility methods for dealing with HBase table name conversions.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
protected static class	HTableNameConverter.PrefixedTableId Used internal to HTableNameConverter, so that one parsing method can extract both the prefix and TableId.

Constructor Summary

Constructors

Constructor and Description
HTableNameConverter()

Method Summary

Methods

Modifier and Type	Method and Description
abstract TableId	from(org.apache.hadoop.hbase.HTableDescriptor htd) Returns TableId for the table represented by the given HTableDescriptor.
protected HTableNameConverter.PrefixedTableId	fromHBaseTableName(String namespace, String qualifier)
protected String	getHBaseTableName(String tablePrefix, TableId tableId)
abstract String	getNamespacePrefix(org.apache.hadoop.hbase.HTableDescriptor htd) Returns the prefix prepended to the namespace.
abstract String	getSysConfigTablePrefix(org.apache.hadoop.hbase.HTableDescriptor htd) Gets the system configuration table prefix.
protected String	toHBaseNamespace(String hBaseNamespacePrefix, Id.Namespace namespace)

Methods inherited from class java.lang.Object

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

Constructor Detail

HTableNameConverter

public HTableNameConverter()

Method Detail

getHBaseTableName

protected String getHBaseTableName(String tablePrefix,
                       TableId tableId)

Returns:

Backward compatible, ASCII encoded table name

getSysConfigTablePrefix

public abstract String getSysConfigTablePrefix(org.apache.hadoop.hbase.HTableDescriptor htd)

Gets the system configuration table prefix.

Parameters:

htd - Table descriptor for any table that can be associated with the

Returns:

System configuration table prefix (full table name minus the table qualifier). Example input: "cdap_ns.table.name" --> output: "cdap_system." (hbase 94) Example input: "cdap.table.name" --> output: "cdap_system." (hbase 94. input table is in default namespace) Example input: "cdap_ns:table.name" --> output: "cdap_system:" (hbase 96, 98)

from

public abstract TableId from(org.apache.hadoop.hbase.HTableDescriptor htd)

Returns TableId for the table represented by the given HTableDescriptor.

getNamespacePrefix

public abstract String getNamespacePrefix(org.apache.hadoop.hbase.HTableDescriptor htd)

Returns the prefix prepended to the namespace.

toHBaseNamespace

protected String toHBaseNamespace(String hBaseNamespacePrefix,
                      Id.Namespace namespace)

fromHBaseTableName

protected HTableNameConverter.PrefixedTableId fromHBaseTableName(String namespace,
                                                     String qualifier)