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org.activemq.util
Class IdGenerator  

java.lang.Object
  org.activemq.util.IdGenerator

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public class IdGenerator

extends java.lang.Object

Generator for globally unique Strings

Version:

$Revision: 1.1.1.1 $

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Field Summary
private static java.lang.String	hostName
private static int	instanceCount
private static org.apache.commons.logging.Log	log
private  java.lang.String	seed
private  long	sequence
private  short	shortSequence
private static java.lang.String	UNIQUE_STUB

 

Constructor Summary

IdGenerator()           Construct an IdGenerator

IdGenerator(java.lang.String seed)           Construct an IdGenerator using the seed provided

 

Method Summary
static int	compare(java.lang.String id1, java.lang.String id2)           Does a proper compare on the ids
java.lang.String	generateId()           Generate a unqiue id
static long	getCountFromId(java.lang.String id)           From a generated id - return the generator count
static java.lang.String	getHostName()           As we have to find the hostname as a side-affect of generating a unique stub, we allow it's easy retrevial here
long	getNextSequence()
short	getNextShortSequence()
java.lang.String	getSeed()
static java.lang.String	getSeedFromId(java.lang.String id)           From a generated id - return the seed (i.e.

 

Methods inherited from class java.lang.Object

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

 

Field Detail

log

private static final org.apache.commons.logging.Log log

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UNIQUE_STUB

private static final java.lang.String UNIQUE_STUB

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instanceCount

private static int instanceCount

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hostName

private static java.lang.String hostName

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seed

private java.lang.String seed

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sequence

private long sequence

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shortSequence

private short shortSequence

Constructor Detail

IdGenerator

public IdGenerator()

Construct an IdGenerator

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IdGenerator

public IdGenerator(java.lang.String seed)

Construct an IdGenerator using the seed provided

Method Detail

getHostName

public static java.lang.String getHostName()

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

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generateId

public java.lang.String generateId()

Generate a unqiue id

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getSeed

public java.lang.String getSeed()

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getNextSequence

public long getNextSequence()

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getNextShortSequence

public short getNextShortSequence()

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getSeedFromId

public static java.lang.String getSeedFromId(java.lang.String id)

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

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getCountFromId

public static long getCountFromId(java.lang.String id)

From a generated id - return the generator count

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compare

public static int compare(java.lang.String id1,
                          java.lang.String id2)

Does a proper compare on the ids

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