org.mortbay.j2ee.session
Class GUIDGenerator

java.lang.Object
  org.mortbay.j2ee.session.GUIDGenerator

All Implemented Interfaces:

Cloneable, IdGenerator

Direct Known Subclasses:

DistributableIdGenerator

public class GUIDGenerator
extends Object
implements IdGenerator

Field Summary

protected MessageDigest	_digest
protected static org.jboss.logging.Logger	_log
protected Random	_random
protected static int	SESSION_ID_BYTES
protected static String	SESSION_ID_HASH_ALGORITHM
protected static String	SESSION_ID_RANDOM_ALGORITHM
protected static String	SESSION_ID_RANDOM_ALGORITHM_ALT

Constructor Summary

GUIDGenerator()

Method Summary

Object	clone()
protected String	encode(byte[] data) Encode the bytes into a String with a slightly modified Base64-algorithm This code was written by Kevin Kelley and adapted by Thomas Peuss
protected MessageDigest	getDigest() get a MessageDigest hash-generator
protected Random	getRandom() get a random-number generator
String	nextId(javax.servlet.http.HttpServletRequest request) Generate a session-id that is not guessable

Methods inherited from class java.lang.Object

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

Field Detail

_log

protected static final org.jboss.logging.Logger _log

SESSION_ID_BYTES

protected static final int SESSION_ID_BYTES

See Also:

Constant Field Values

SESSION_ID_HASH_ALGORITHM

protected static final String SESSION_ID_HASH_ALGORITHM

See Also:

Constant Field Values

SESSION_ID_RANDOM_ALGORITHM

protected static final String SESSION_ID_RANDOM_ALGORITHM

See Also:

Constant Field Values

SESSION_ID_RANDOM_ALGORITHM_ALT

protected static final String SESSION_ID_RANDOM_ALGORITHM_ALT

See Also:

Constant Field Values

_digest

protected MessageDigest _digest

_random

protected Random _random

Constructor Detail

GUIDGenerator

public GUIDGenerator()

Method Detail

nextId

public String nextId(javax.servlet.http.HttpServletRequest request)

Generate a session-id that is not guessable

Specified by:

nextId in interface IdGenerator

Returns:

generated session-id

encode

protected String encode(byte[] data)

Encode the bytes into a String with a slightly modified Base64-algorithm This code was written by Kevin Kelley and adapted by Thomas Peuss

Parameters:

data - The bytes you want to encode

Returns:

the encoded String

getRandom

protected Random getRandom()

get a random-number generator

Returns:

a random-number generator

getDigest

protected MessageDigest getDigest()

get a MessageDigest hash-generator

Returns:

a hash generator

clone

public Object clone()

Specified by:

clone in interface IdGenerator

Overrides:

clone in class Object