Package org.apache.activemq.util

Class IdGenerator

java.lang.Object

org.apache.activemq.util.IdGenerator

public class IdGenerator
extends Object

Generator for Globally unique Strings.

Field Summary

Fields

Modifier and Type	Field	Description
static String	PROPERTY_IDGENERATOR_HOSTNAME
static String	PROPERTY_IDGENERATOR_LOCALPORT
static String	PROPERTY_IDGENERATOR_PORT

Constructor Summary

Constructors

Constructor	Description
IdGenerator()
IdGenerator(String prefix)	Construct an IdGenerator

Method Summary

Modifier and Type	Method	Description
static int	compare(String id1, String id2)	Does a proper compare on the ids
String	generateId()	Generate a unique id
String	generateSanitizedId()	Generate a unique ID - that is friendly for a URL or file system
static String	getHostName()	As we have to find the hostname as a side-affect of generating a unique stub, we allow it's easy retrieval here
static String	getSeedFromId(String id)	From a generated id - return the seed (i.e. minus the count)
static long	getSequenceFromId(String id)	From a generated id - return the generator count
static String	sanitizeHostName(String hostName)

Methods inherited from class java.lang.Object

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

Field Detail

PROPERTY_IDGENERATOR_HOSTNAME

public static final String PROPERTY_IDGENERATOR_HOSTNAME

See Also:

Constant Field Values

PROPERTY_IDGENERATOR_LOCALPORT

public static final String PROPERTY_IDGENERATOR_LOCALPORT

See Also:

Constant Field Values

PROPERTY_IDGENERATOR_PORT

public static final String PROPERTY_IDGENERATOR_PORT

See Also:

Constant Field Values

Constructor Detail

IdGenerator

public IdGenerator(String prefix)

Construct an IdGenerator

IdGenerator

public IdGenerator()

Method Detail

getHostName

public static String getHostName()

As we have to find the hostname as a side-affect of generating a unique stub, we allow it's easy retrieval here

Returns:

the local host name

generateId

public String generateId()

Generate a unique id

Returns:

a unique id

sanitizeHostName

public static String sanitizeHostName(String hostName)

generateSanitizedId

public String generateSanitizedId()

Generate a unique ID - that is friendly for a URL or file system

Returns:

a unique id

getSeedFromId

public static String getSeedFromId(String id)

From a generated id - return the seed (i.e. minus the count)

Parameters:

id - the generated identifier

Returns:

the seed

getSequenceFromId

public static long getSequenceFromId(String id)

From a generated id - return the generator count

Parameters:

id -

Returns:

the count

compare

public static int compare(String id1,
                          String id2)

Does a proper compare on the ids

Parameters:

id1 -

id2 -

Returns:

0 if equal else a positive if id1 is > id2 ...