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

Class AppIdKeyConverter

java.lang.Object

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

All Implemented Interfaces:

KeyConverter<java.lang.String>

public final class AppIdKeyConverter
extends java.lang.Object
implements KeyConverter<java.lang.String>

Encodes and decodes ApplicationId for row keys. App ID is stored in row key as 12 bytes, cluster timestamp section of app id (long - 8 bytes) followed by sequence id section of app id (int - 4 bytes).

Constructor Summary

Constructors

Constructor	Description
AppIdKeyConverter()

Method Summary

Modifier and Type	Method	Description
java.lang.String	decode(byte[] appIdBytes)	Decodes a byte array and returns a key of type T.
byte[]	encode(java.lang.String appIdStr)	Encodes a key as a byte array.
static int	getKeySize()	Returns the size of app id after encoding.

Methods inherited from class java.lang.Object

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

Constructor Detail

AppIdKeyConverter

public AppIdKeyConverter()

Method Detail

encode

public byte[] encode(java.lang.String appIdStr)

Description copied from interface: KeyConverter

Encodes a key as a byte array.

Specified by:

encode in interface KeyConverter<java.lang.String>

Parameters:

appIdStr - key to be encoded.

Returns:

a byte array.

decode

public java.lang.String decode(byte[] appIdBytes)

Description copied from interface: KeyConverter

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

Specified by:

decode in interface KeyConverter<java.lang.String>

Parameters:

appIdBytes - byte representation

Returns:

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

getKeySize

public static int getKeySize()

Returns the size of app id after encoding.

Returns:

size of app id after encoding.