Package com.db4o.internal.config

Class IdSystemConfigurationImpl

java.lang.Object

com.db4o.internal.config.IdSystemConfigurationImpl

All Implemented Interfaces:

IdSystemConfiguration

public class IdSystemConfigurationImpl
extends java.lang.Object
implements IdSystemConfiguration

Constructor Summary

Constructors

Constructor	Description
IdSystemConfigurationImpl(Config4Impl config)

Method Summary

Modifier and Type	Method	Description
void	useCustomSystem(IdSystemFactory factory)	configures db4o to use a custom ID system.
void	useInMemorySystem()	configures db4o to use an in-memory ID system.
void	usePointerBasedSystem()	configures db4o to store IDs as pointers.
void	useSingleBTreeSystem()	configures db4o to use a single BTreeIdSystem on top of an InMemoryIdSystem.
void	useStackedBTreeSystem()	configures db4o to use a stack of two BTreeIdSystems on top of an InMemoryIdSystem.

Methods inherited from class java.lang.Object

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

Constructor Detail

IdSystemConfigurationImpl

public IdSystemConfigurationImpl(Config4Impl config)

Method Detail

usePointerBasedSystem

public void usePointerBasedSystem()

Description copied from interface: IdSystemConfiguration

configures db4o to store IDs as pointers.

Specified by:

usePointerBasedSystem in interface IdSystemConfiguration

useStackedBTreeSystem

public void useStackedBTreeSystem()

Description copied from interface: IdSystemConfiguration

configures db4o to use a stack of two BTreeIdSystems on top of an InMemoryIdSystem. This setup is scalable for large numbers of IDs. It is the default configuration when new databases are created.

Specified by:

useStackedBTreeSystem in interface IdSystemConfiguration

useInMemorySystem

public void useInMemorySystem()

Description copied from interface: IdSystemConfiguration

configures db4o to use an in-memory ID system. All IDs get written to the database file on every commit.

Specified by:

useInMemorySystem in interface IdSystemConfiguration

useCustomSystem

public void useCustomSystem(IdSystemFactory factory)

Description copied from interface: IdSystemConfiguration

configures db4o to use a custom ID system. Pass an IdSystemFactory that creates the IdSystem. Note that this factory has to be configured every time you open a database that you configured to use a custom IdSystem.

Specified by:

useCustomSystem in interface IdSystemConfiguration

useSingleBTreeSystem

public void useSingleBTreeSystem()

Description copied from interface: IdSystemConfiguration

configures db4o to use a single BTreeIdSystem on top of an InMemoryIdSystem. This setup is suitable for smaller databases with a small number of IDs. For larger numbers of IDs call IdSystemConfiguration.useStackedBTreeSystem().

Specified by:

useSingleBTreeSystem in interface IdSystemConfiguration