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

Interface Column<T extends BaseTable<T>>

All Known Implementing Classes:

ApplicationColumn, AppToFlowColumn, DomainColumn, EntityColumn, FlowRunColumn, SubApplicationColumn

public interface Column<T extends BaseTable<T>>

A Column represents the way to store a fully qualified column in a specific table.

Method Summary

Modifier and Type	Method	Description
byte[]	getColumnFamilyBytes()	Returns column family name(as bytes) associated with this column.
byte[]	getColumnQualifierBytes()	Get byte representation for this column qualifier.
Attribute[]	getCombinedAttrsWithAggr(Attribute... attributes)	Return attributed combined with aggregations, if any.
ValueConverter	getValueConverter()	Returns value converter implementation associated with this column.
boolean	supplementCellTimestamp()	Return true if the cell timestamp needs to be supplemented.

Method Detail

getColumnFamilyBytes

byte[] getColumnFamilyBytes()

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

Returns:

a byte array encoding column family for this column qualifier.

getColumnQualifierBytes

byte[] getColumnQualifierBytes()

Get byte representation for this column qualifier.

Returns:

a byte array representing column qualifier.

getValueConverter

ValueConverter getValueConverter()

Returns value converter implementation associated with this column.

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