Package com.db4o.io

Class CachingStorage

java.lang.Object

com.db4o.io.StorageDecorator

com.db4o.io.CachingStorage

All Implemented Interfaces:

Storage

public class CachingStorage
extends StorageDecorator

Caching storage adapter to cache db4o database data in memory until the underlying Bin is instructed to flush its data when Bin.sync() is called.

You can override the newCache() method if you want to work with a different caching strategy.

Field Summary

Fields inherited from class com.db4o.io.StorageDecorator

_storage

Constructor Summary

Constructors

Constructor	Description
CachingStorage(Storage storage)	default constructor to create a Caching storage with the default page count of 64 and the default page size of 1024.
CachingStorage(Storage storage, int pageCount, int pageSize)	constructor to set up a CachingStorage with a configured page count and page size

Method Summary

Modifier and Type	Method	Description
protected Cache4<java.lang.Long,java.lang.Object>	newCache()	override this method if you want to work with a different caching strategy than the default LRU2Q cache.
Bin	open(BinConfiguration config)	opens a Bin for the given URI.

Methods inherited from class com.db4o.io.StorageDecorator

decorate, delete, exists, rename

Methods inherited from class java.lang.Object

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

Constructor Detail

CachingStorage

public CachingStorage(Storage storage)

default constructor to create a Caching storage with the default page count of 64 and the default page size of 1024.

Parameters:

storage - the Storage to be cached.

CachingStorage

public CachingStorage(Storage storage,
                      int pageCount,
                      int pageSize)

constructor to set up a CachingStorage with a configured page count and page size

Parameters:

storage - the Storage to be cached.

pageCount - the number of pages the cache should use.

pageSize - the size of the pages the cache should use.

Method Detail

open

public Bin open(BinConfiguration config)
         throws Db4oIOException

opens a Bin for the given URI.

Specified by:

open in interface Storage

Overrides:

open in class StorageDecorator

Throws:

Db4oIOException

newCache

protected Cache4<java.lang.Long,java.lang.Object> newCache()

override this method if you want to work with a different caching strategy than the default LRU2Q cache.