com.j_spaces.kernel.locks

Class MVCCLockManager<T extends ILockObject>

java.lang.Object

com.j_spaces.kernel.locks.MVCCLockManager<T>

All Implemented Interfaces:

IBasicLockManager<T>

public class MVCCLockManager<T extends ILockObject>
extends Object
implements IBasicLockManager<T>

Constructor Summary

Constructors

Constructor and Description
MVCCLockManager()
MVCCLockManager(SpaceConfigReader configReader)

Method Summary

Modifier and Type	Method and Description
void	freeLockObject(ILockObject lockObject) free the lock object - no more needed by this thread
ILockObject	getLockObject(String subjectUid) based only on subject's uid, return a lock object in order to lock the represented subject this method is relevant only for evictable objects
ILockObject	getLockObject(T subject) based on subject, return a lock object in order to lock the represented subject.
boolean	isEntryLocksItsSelf(T entry) true if the lock object is the subject itself (i.e.

Methods inherited from class java.lang.Object

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

Constructor Detail

MVCCLockManager

public MVCCLockManager(SpaceConfigReader configReader)

MVCCLockManager

public MVCCLockManager()

Method Detail

getLockObject

public ILockObject getLockObject(T subject)

Description copied from interface: IBasicLockManager

based on subject, return a lock object in order to lock the represented subject.

If the subject is part of evictable from space (like lru) or evicatble from cache (like in TieredStorage with cache rule) we use the subject itself, otherwise we use per-logical subject a different object.

Note - template and transient entry are not evictable.

Specified by:

getLockObject in interface IBasicLockManager<T extends ILockObject>

Returns:

the lock object

getLockObject

public ILockObject getLockObject(String subjectUid)

Description copied from interface: IBasicLockManager

based only on subject's uid, return a lock object in order to lock the represented subject this method is relevant only for evictable objects

Specified by:

getLockObject in interface IBasicLockManager<T extends ILockObject>

Returns:

the lock object

freeLockObject

public void freeLockObject(ILockObject lockObject)

Description copied from interface: IBasicLockManager

free the lock object - no more needed by this thread

Specified by:

freeLockObject in interface IBasicLockManager<T extends ILockObject>

Parameters:

lockObject - the lock object

isEntryLocksItsSelf

public boolean isEntryLocksItsSelf(T entry)

Description copied from interface: IBasicLockManager

true if the lock object is the subject itself (i.e. entry or template), false if it is representing object. Note - this method is for entries only!.

Specified by:

isEntryLocksItsSelf in interface IBasicLockManager<T extends ILockObject>

Returns:

true if is the subject itself