fc.util

Class UUIDUtil

java.lang.Object

fc.util.UUIDUtil

public final class UUIDUtil
extends Object

Constructor Summary

Constructors

Constructor and Description
UUIDUtil()

Method Summary

Modifier and Type	Method and Description
static void	main(String[] args)
static String	newID() Returns a 8 character string suitable for tracking, affiliate, short codes, etc.
static String	newID(int len) Returns a N-char string suitable for tracking, affiliate, short codes, etc.
static String	newSessionID() Returns a ID suitable for a session/cookie identifier.

Methods inherited from class java.lang.Object

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

Constructor Detail

UUIDUtil

public UUIDUtil()

Method Detail

newSessionID

public static String newSessionID()

Returns a ID suitable for a session/cookie identifier.

See: cookies.lcs.mit.edu
See: www.across.si

There are 2 issues with generating sessionid's. 

1) uniqueness - 2 or more sessionid's should not end up being 
   the same.
2) hard-to-guess - For example, sequential values like 
   1, 2, 3 are unique but easy to guess and therefore easy
   to session hijack.

Our sessionid's have 2 parts:
a) a timestamp for guaranteed uniqueness  (easy to guess)
b) random data (hard to guess)

newID

public static String newID(int len)

Returns a N-char string suitable for tracking, affiliate, short codes, etc. Uses characters safe for all URL's.

Parameters:

len - the length of the returned string

newID

public static String newID()

Returns a 8 character string suitable for tracking, affiliate, short codes, etc. Uses characters safe for all URL's.

main

public static void main(String[] args)