com.objectwave.persist.broker
Class GlobalSequence

java.lang.Object
  |
  +--com.objectwave.persist.broker.GlobalSequence

All Implemented Interfaces:

PrimaryKeyStrategy

public class GlobalSequence

extends java.lang.Object

implements PrimaryKeyStrategy

Use a sequence called GLOBAL_UID_SEQ to generate primary key values.

Version:

$Id: GlobalSequence.java,v 2.1 2002/03/09 15:23:03 dave_hoag Exp $

Author:

dhoag

Field Summary

protected int	currentPkey
protected int	pkeyPool

Constructor Summary

GlobalSequence()
Constructor for the GlobalSequence object

Method Summary

java.lang.String	getSequenceColumnName()
java.lang.String	getSequenceTableName() When using Oracle, the default of DUAL works just fine - this may be true with other databases, but I have no idea.
java.lang.Object	nextPrimaryKey(RDBBroker broker, RDBPersistence pObj) Calls to this method should never return the same value.
void	setSequenceColumnName(java.lang.String aValue) When using oracle, the default sequence will be just fine, but you may have reasons of your own to change it.
void	setSequenceTableName(java.lang.String aValue) When using Oracle, the default of DUAL works just fine - this may be true with other databases, but I have no idea.

Methods inherited from class java.lang.Object

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

Field Detail

pkeyPool

protected int pkeyPool

currentPkey

protected int currentPkey

Constructor Detail

GlobalSequence

public GlobalSequence()

Constructor for the GlobalSequence object

Method Detail

setSequenceTableName

public void setSequenceTableName(java.lang.String aValue)

When using Oracle, the default of DUAL works just fine - this may be true with other databases, but I have no idea.

Parameters:

aValue - The new SequenceTableName value

setSequenceColumnName

public void setSequenceColumnName(java.lang.String aValue)

When using oracle, the default sequence will be just fine, but you may have reasons of your own to change it.

Parameters:

aValue - The new SequenceColumnName value

getSequenceTableName

public java.lang.String getSequenceTableName()

When using Oracle, the default of DUAL works just fine - this may be true with other databases, but I have no idea.

Returns:

The SequenceTableName value

getSequenceColumnName

public java.lang.String getSequenceColumnName()

Returns:

The SequenceColumnName value

nextPrimaryKey

public java.lang.Object nextPrimaryKey(RDBBroker broker,
                                       RDBPersistence pObj)
                                throws java.sql.SQLException,
                                       QueryException

Description copied from interface: PrimaryKeyStrategy

Calls to this method should never return the same value. When this method is called, the broker assumes the value returned will create a unique primary key value that can identify a unique row in the database.

Specified by:

nextPrimaryKey in interface PrimaryKeyStrategy

Parameters:

broker -

pObj -

Returns:

Throws:

java.sql.SQLException

QueryException