org.ws4d.java.util

Class IDGenerator

java.lang.Object

org.ws4d.java.util.IDGenerator

public final class IDGenerator
extends java.lang.Object

This class can be used to create RFC-4122 time based Universally Unique Identifiers with random host node part. Portions adopted from the JUG UUID generator. Also offers methods for generating random numbers.

See Also:

http://jug.safehaus.org/, http://www.faqs.org/rfcs/rfc4122.html

Field Summary

Fields

Modifier and Type	Field and Description
static java.lang.String	URI_UUID_PREFIX the prefix to be used.
static java.lang.String	UUID_PREFIX

Method Summary

Modifier and Type	Method and Description
static long	getSequenceNumber() Returns a sequence number that is unique within a single VM until this VM is restarted.
static int	getStaticMsgId() Increment static message id.
static java.lang.String	getUUID() Returns a RFC-4122 conformant UUID, normal form.
static URI	getUUIDasURI() Returns the UUID as URI.

Methods inherited from class java.lang.Object

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

Field Detail

UUID_PREFIX

public static final java.lang.String UUID_PREFIX

See Also:

Constant Field Values

URI_UUID_PREFIX

public static final java.lang.String URI_UUID_PREFIX

the prefix to be used.

See Also:

Constant Field Values

Method Detail

getUUID

public static java.lang.String getUUID()

Returns a RFC-4122 conformant UUID, normal form.

Returns:

a RFC-4122 conformant UUID, normal form.

getUUIDasURI

public static URI getUUIDasURI()

Returns the UUID as URI. e.g. "urn:uuid:550e8400-e29b-11d4-a716-446655440000". URI schemas: http://www.iana.org/assignments/uri-schemes.html URN namespaces: http://www.iana.org/assignments/urn-namespaces/

Returns:

the UUID URI.

getSequenceNumber

public static long getSequenceNumber()

Returns a sequence number that is unique within a single VM until this VM is restarted.

Returns:

the sequence number

getStaticMsgId

public static int getStaticMsgId()

Increment static message id.

Returns:

internal message id