org.datanucleus.store.neodatis.valuegenerator

Class NeoDatisIncrementGenerator

java.lang.Object

org.datanucleus.store.valuegenerator.AbstractGenerator<T>

org.datanucleus.store.valuegenerator.AbstractDatastoreGenerator<Long>

org.datanucleus.store.neodatis.valuegenerator.NeoDatisIncrementGenerator

All Implemented Interfaces:

org.datanucleus.store.valuegenerator.ValueGenerator<Long>

public class NeoDatisIncrementGenerator
extends org.datanucleus.store.valuegenerator.AbstractDatastoreGenerator<Long>

Value generator for NeoDatis that provides increment/sequence like generation. Utilises the persistence of objects of NucleusSequence. Each objects stores the sequence class/field name and the current value of that sequence.

Field Summary

Fields inherited from class org.datanucleus.store.valuegenerator.AbstractDatastoreGenerator

connectionProvider, storeMgr

Fields inherited from class org.datanucleus.store.valuegenerator.AbstractGenerator

allocationSize, block, initialValue, name, properties, repositoryExists

Constructor Summary

Constructors

Constructor and Description
NeoDatisIncrementGenerator(String name, Properties props) Constructor.

Method Summary

Modifier and Type	Method and Description
protected org.datanucleus.store.valuegenerator.ValueGenerationBlock<Long>	obtainGenerationBlock(int number) Get a new PoidBlock with the specified number of ids.
protected org.datanucleus.store.valuegenerator.ValueGenerationBlock<Long>	reserveBlock(long size) Method to reserve a block of "size" identities.

Methods inherited from class org.datanucleus.store.valuegenerator.AbstractDatastoreGenerator

setConnectionProvider, setStoreManager

Methods inherited from class org.datanucleus.store.valuegenerator.AbstractGenerator

allocate, createRepository, current, currentValue, getName, getStorageClass, next, nextValue, obtainGenerationBlock, repositoryExists, requiresRepository, reserveBlock

Methods inherited from class java.lang.Object

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

Constructor Detail

NeoDatisIncrementGenerator

public NeoDatisIncrementGenerator(String name,
                                  Properties props)

Constructor.

Parameters:

name - Symbolic name for this generator

props - Properties defining the behaviour of this generator

Method Detail

obtainGenerationBlock

protected org.datanucleus.store.valuegenerator.ValueGenerationBlock<Long> obtainGenerationBlock(int number)

Get a new PoidBlock with the specified number of ids.

Overrides:

obtainGenerationBlock in class org.datanucleus.store.valuegenerator.AbstractGenerator<Long>

Parameters:

number - The number of additional ids required

Returns:

the PoidBlock

reserveBlock

protected org.datanucleus.store.valuegenerator.ValueGenerationBlock<Long> reserveBlock(long size)

Method to reserve a block of "size" identities.

Specified by:

reserveBlock in class org.datanucleus.store.valuegenerator.AbstractGenerator<Long>

Parameters:

size - Block size

Returns:

The reserved block