org.datanucleus.store.rdbms.valuegenerator

Class AbstractRDBMSGenerator<T>

java.lang.Object

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

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

org.datanucleus.store.rdbms.valuegenerator.AbstractRDBMSGenerator<T>

All Implemented Interfaces:

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

Direct Known Subclasses:

DatastoreUUIDHexGenerator, MaxGenerator, SequenceGenerator, TableGenerator

public abstract class AbstractRDBMSGenerator<T>
extends org.datanucleus.store.valuegenerator.AbstractDatastoreGenerator<T>

Abstract representation of a ValueGenerator for RDBMS datastores. Builds on the base AbstractValueGenerator, and providing datastore connection and StoreManager information.

Nested Class Summary

Nested classes/interfaces inherited from class org.datanucleus.store.valuegenerator.AbstractDatastoreGenerator

org.datanucleus.store.valuegenerator.AbstractDatastoreGenerator.ConnectionPreference

Field Summary

Fields

Modifier and Type	Field and Description
protected org.datanucleus.store.connection.ManagedConnection	connection Connection to the datastore.

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
AbstractRDBMSGenerator(String name, Properties props) Constructor.

Method Summary

Modifier and Type	Method and Description
protected org.datanucleus.store.valuegenerator.ValueGenerationBlock<T>	obtainGenerationBlock(int number) Get a new PoidBlock with the specified number of ids.
boolean	requiresConnection() Method to reply if the generator requires a connection.

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

getConnectionPreference, setConnectionProvider, setStoreManager

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

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

Methods inherited from class java.lang.Object

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

Field Detail

connection

protected org.datanucleus.store.connection.ManagedConnection connection

Connection to the datastore.

Constructor Detail

AbstractRDBMSGenerator

public AbstractRDBMSGenerator(String name,
                              Properties props)

Constructor.

Parameters:

name - Symbolic name for the generator

props - Properties controlling the behaviour of the generator

Method Detail

requiresConnection

public boolean requiresConnection()

Method to reply if the generator requires a connection.

Returns:

Whether a connection is required.

obtainGenerationBlock

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

Get a new PoidBlock with the specified number of ids.

Overrides:

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

Parameters:

number - The number of additional ids required

Returns:

the PoidBlock