org.datamanager.kernel
Class KernelMemory

java.lang.Object
  |
  +--org.datamanager.kernel.KernelMemory

public class KernelMemory

extends Object

This class will cooperate with SuaveEntityManger to manager the object in the memory of the knernel. It can provide the lookup capability for Entity, Proxy, Identifier. It also can find the oldest object reside in the memory

Author:

xi rao & bob

Field Summary

protected Map	entityToIdentifier A mapping from VerySimpleEntities to Identifiers.
static int	HASHTABLE_LENGTH The maximum number of Entities cached in memory at a given time.
protected Map	identifierToEntity A mapping from Identifiers to VerySimpleEntities.
protected Map	identifierToProxy A mapping from Identifiers to EntityProxies.
protected Map	IdentifierToTimeStamp
protected TreeMap	timeStampToIdentifier

Constructor Summary

KernelMemory()

Method Summary

int	currentSize()
protected Entity	findEntity(org.datamanager.kernel.Identifier identifier)
org.datamanager.kernel.Identifier	findIdentifier(Entity entity)
org.datamanager.kernel.Identifier	findOldestIdentifier()
protected org.datamanager.kernel.EntityProxy	findProxy(org.datamanager.kernel.Identifier identifier)
boolean	isFull()
void	loadIntoMemory(org.datamanager.kernel.Identifier identifier, Entity entity, org.datamanager.kernel.EntityProxy entityProxy)
int	maxSize()
Entity	removeFromMemory(org.datamanager.kernel.Identifier identifier)

Methods inherited from class java.lang.Object

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

Field Detail

HASHTABLE_LENGTH

public static final int HASHTABLE_LENGTH

The maximum number of Entities cached in memory at a given time.

See Also:

Constant Field Values

entityToIdentifier

protected Map entityToIdentifier

A mapping from VerySimpleEntities to Identifiers.

identifierToEntity

protected Map identifierToEntity

A mapping from Identifiers to VerySimpleEntities.

identifierToProxy

protected Map identifierToProxy

A mapping from Identifiers to EntityProxies.

timeStampToIdentifier

protected TreeMap timeStampToIdentifier

IdentifierToTimeStamp

protected Map IdentifierToTimeStamp

Constructor Detail

KernelMemory

public KernelMemory()

Method Detail

isFull

public boolean isFull()

loadIntoMemory

public void loadIntoMemory(org.datamanager.kernel.Identifier identifier,
                           Entity entity,
                           org.datamanager.kernel.EntityProxy entityProxy)
                    throws Exception

Exception

findOldestIdentifier

public org.datamanager.kernel.Identifier findOldestIdentifier()

removeFromMemory

public Entity removeFromMemory(org.datamanager.kernel.Identifier identifier)

currentSize

public int currentSize()

maxSize

public int maxSize()

findIdentifier

public org.datamanager.kernel.Identifier findIdentifier(Entity entity)

findProxy

protected org.datamanager.kernel.EntityProxy findProxy(org.datamanager.kernel.Identifier identifier)

findEntity

protected Entity findEntity(org.datamanager.kernel.Identifier identifier)