Package com.db4o.io

Class MemoryStorage

java.lang.Object

com.db4o.io.MemoryStorage

All Implemented Interfaces:

Storage

public class MemoryStorage
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
MemoryStorage()
MemoryStorage(GrowthStrategy growthStrategy)

Method Summary

Modifier and Type	Method	Description
MemoryBin	bin(java.lang.String uri)	Returns the memory bin for the given URI for external use.
void	bin(java.lang.String uri, MemoryBin 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).
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

MemoryStorage

public MemoryStorage()

MemoryStorage

public MemoryStorage(GrowthStrategy growthStrategy)

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 MemoryBin bin(java.lang.String uri)

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

bin

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

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

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