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

Class EventColumnNameConverter

java.lang.Object

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

All Implemented Interfaces:

KeyConverter<EventColumnName>

public final class EventColumnNameConverter
extends Object
implements KeyConverter<EventColumnName>

Encodes and decodes event column names for application and entity tables. The event column name is of the form : eventId=timestamp=infokey. If info is not associated with the event, event column name is of the form : eventId=timestamp= Event timestamp is long and rest are strings. Column prefixes are not part of the eventcolumn name passed for encoding. It is added later, if required in the associated ColumnPrefix implementations.

Constructor Summary

Constructors

Constructor	Description
EventColumnNameConverter()

Method Summary

Modifier and Type	Method	Description
EventColumnName	decode(byte[] bytes)	Decodes a byte array and returns a key of type T.
byte[]	encode(EventColumnName key)	Encodes a key as a byte array.

Methods inherited from class java.lang.Object

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

Constructor Details

EventColumnNameConverter

public EventColumnNameConverter()

Method Details

encode

public byte[] encode(EventColumnName key)

Description copied from interface: KeyConverter

Encodes a key as a byte array.

Specified by:

encode in interface KeyConverter<EventColumnName>

Parameters:

key - key to be encoded.

Returns:

a byte array.

decode

public EventColumnName decode(byte[] bytes)

Description copied from interface: KeyConverter

Decodes a byte array and returns a key of type T.

Specified by:

decode in interface KeyConverter<EventColumnName>

Parameters:

bytes - byte representation

Returns:

an object(key) of type T which has been constructed after decoding the bytes.