Package com.db4o.io

Class PagingMemoryStorage

java.lang.Object

com.db4o.io.PagingMemoryStorage

All Implemented Interfaces:

Storage

public class PagingMemoryStorage
extends java.lang.Object
implements Storage

Storage implementation that produces Bin instances that operate in memory. Use this Storage to work with db4o as an in-memory database.

Constructor Summary

Constructors

Constructor	Description
PagingMemoryStorage()
PagingMemoryStorage(int pageSize)

Method Summary

Modifier and Type	Method	Description
Bin	bin(java.lang.String uri)	Returns the memory bin for the given URI for external use.
void	bin(java.lang.String uri, Bin bin)	Registers the given bin for this storage with the given URI.
void	delete(java.lang.String uri)	Deletes the bin for the given URI from the storage.
boolean	exists(java.lang.String uri)	returns true if a MemoryBin with the given URI name already exists in this Storage.
Bin	open(BinConfiguration config)	opens a MemoryBin for the given URI (name can be freely chosen).
protected Bin	produceBin(BinConfiguration config, int pageSize)
void	rename(java.lang.String oldUri, java.lang.String newUri)	Renames the bin for the given old URI to the new URI.

Methods inherited from class java.lang.Object

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

Constructor Detail

PagingMemoryStorage

public PagingMemoryStorage()

PagingMemoryStorage

public PagingMemoryStorage(int pageSize)

Method Detail

exists

public boolean exists(java.lang.String uri)

returns true if a MemoryBin with the given URI name already exists in this Storage.

Specified by:

exists in interface Storage

open

public Bin open(BinConfiguration config)
         throws Db4oIOException

opens a MemoryBin for the given URI (name can be freely chosen).

Specified by:

open in interface Storage

Throws:

Db4oIOException

bin

public Bin bin(java.lang.String uri)

Returns the memory bin for the given URI for external use.

bin

public void bin(java.lang.String uri,
                Bin bin)

Registers the given bin for this storage with the given URI.

produceBin

protected Bin produceBin(BinConfiguration config,
                         int pageSize)

delete

public void delete(java.lang.String uri)
            throws java.io.IOException

Description copied from interface: Storage

Deletes the bin for the given URI from the storage.

Specified by:

delete in interface Storage

Parameters:

uri - bin URI

Throws:

java.io.IOException - if the bin could not be deleted

rename

public void rename(java.lang.String oldUri,
                   java.lang.String newUri)
            throws java.io.IOException

Description copied from interface: Storage

Renames the bin for the given old URI to the new URI. If a bin for the new URI exists, it will be overwritten.

Specified by:

rename in interface Storage

Parameters:

oldUri - URI of the existing bin

newUri - future URI of the bin

Throws:

java.io.IOException - if the bin could not be deleted