org.lsst.ccs.utilities.tracers

Class Names

java.lang.Object

org.lsst.ccs.utilities.tracers.Names

public class Names
extends Object

Author:

bamade

Field Summary

Fields

Modifier and Type	Field and Description
static long	LSST_EPOCH

Constructor Summary

Constructors

Constructor and Description
Names()

Method Summary

Modifier and Type	Method and Description
static String	almostUniqueAgentName() same as uniqueAgentName(null)
static String	almostUniqueAgentName(String seed) generates a (nearly) unique name for a given machine.
static String	almostUniqueLocalName(String seed) can used to generate simple names based on a seed and a timestamp.
static long	simpleTimestamp() returns a short timestamp starting from LSST_EPOCH
static String	toBase64String(long val) transforms a long value in an (unconventional) base64 String (it is not the standard base64 encoding but contains character '=' instead of '/')

Methods inherited from class java.lang.Object

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

Field Detail

LSST_EPOCH

public static final long LSST_EPOCH

Constructor Detail

Names

public Names()

Method Detail

almostUniqueAgentName

public static String almostUniqueAgentName(String seed)

generates a (nearly) unique name for a given machine. This can be used if one wants something more "readable" than a UUID But since it uses a timestamp then calling this method in rapid succession will generate the same name based on the same timestamp. this duplication could also happen if this method is called by two different process on the same machine. So it is ok only to generate a name called once on a machine

Parameters:

seed - any string including null

Returns:

a concatenation of the seed, the machine name and a base 36 representation of the time

almostUniqueAgentName

public static String almostUniqueAgentName()

same as uniqueAgentName(null)

Returns:

almostUniqueLocalName

public static String almostUniqueLocalName(String seed)

can used to generate simple names based on a seed and a timestamp. The string is not guaranteed unique if generated in rapid succession or in concurrent processes

Parameters:

seed - any String (including null)

Returns:

simpleTimestamp

public static long simpleTimestamp()

returns a short timestamp starting from LSST_EPOCH

Returns:

toBase64String

public static String toBase64String(long val)

transforms a long value in an (unconventional) base64 String (it is not the standard base64 encoding but contains character '=' instead of '/')

Parameters:

val -

Returns: