Package org.apache.hadoop.yarn.server.timelineservice.storage.common

Interface ColumnPrefix<T extends BaseTable<T>>

All Known Implementing Classes:

ApplicationColumnPrefix, AppToFlowColumnPrefix, EntityColumnPrefix, FlowActivityColumnPrefix, FlowRunColumnPrefix, SubApplicationColumnPrefix

public interface ColumnPrefix<T extends BaseTable<T>>

Used to represent a partially qualified column, where the actual column name will be composed of a prefix and the remainder of the column qualifier. The prefix can be null, in which case the column qualifier will be completely determined when the values are stored.

Method Summary

Modifier and Type	Method	Description
byte[]	getColumnFamilyBytes()	Returns column family name(as bytes) associated with this column prefix.
byte[]	getColumnPrefixBytes(byte[] qualifierPrefix)
byte[]	getColumnPrefixBytes(java.lang.String qualifierPrefix)
byte[]	getColumnPrefixInBytes()	Get the column prefix in bytes.
Attribute[]	getCombinedAttrsWithAggr(Attribute... attributes)	Return attributed combined with aggregations, if any.
ValueConverter	getValueConverter()	Returns value converter implementation associated with this column prefix.
boolean	supplementCellTimeStamp()	Return true if the cell timestamp needs to be supplemented.

Method Detail

getColumnPrefixBytes

byte[] getColumnPrefixBytes(java.lang.String qualifierPrefix)

Parameters:

qualifierPrefix - Column qualifier or prefix of qualifier.

Returns:

a byte array encoding column prefix and qualifier/prefix passed.

getColumnPrefixBytes

byte[] getColumnPrefixBytes(byte[] qualifierPrefix)

Parameters:

qualifierPrefix - Column qualifier or prefix of qualifier.

Returns:

a byte array encoding column prefix and qualifier/prefix passed.

getColumnPrefixInBytes

byte[] getColumnPrefixInBytes()

Get the column prefix in bytes.

Returns:

column prefix in bytes

getColumnFamilyBytes

byte[] getColumnFamilyBytes()

Returns column family name(as bytes) associated with this column prefix.

Returns:

a byte array encoding column family for this prefix.

getValueConverter

ValueConverter getValueConverter()

Returns value converter implementation associated with this column prefix.

Returns:

a ValueConverter implementation.

getCombinedAttrsWithAggr

Attribute[] getCombinedAttrsWithAggr(Attribute... attributes)

Return attributed combined with aggregations, if any.

Returns:

an array of Attributes

supplementCellTimeStamp

boolean supplementCellTimeStamp()

Return true if the cell timestamp needs to be supplemented.

Returns:

true if the cell timestamp needs to be supplemented