com.j_spaces.kernel.locks

Class OffHeapLockManager<T extends ISelfLockingSubject>

java.lang.Object

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

All Implemented Interfaces:

IBasicLockManager<T>

public class OffHeapLockManager<T extends ISelfLockingSubject>
extends Object
implements IBasicLockManager<T>

locks The resident part of entry that resides in-heap

Since:

9.8

Author:

yechiel

Constructor Summary

Constructors

Constructor and Description
OffHeapLockManager()

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
ILockObject	getLockObject(T subject, boolean isEvictable) based on subject, return a lock object in order to lock the subject
boolean	isPerLogicalSubjectLockObject(boolean isEvictable) do we use per-logical subject a different object for locking ?

Methods inherited from class java.lang.Object

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

Constructor Detail

OffHeapLockManager

public OffHeapLockManager()

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

Specified by:

getLockObject in interface IBasicLockManager<T extends ISelfLockingSubject>

Returns:

the lock object

getLockObject

public ILockObject getLockObject(T subject,
                                 boolean isEvictable)

Description copied from interface: IBasicLockManager

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

Specified by:

getLockObject in interface IBasicLockManager<T extends ISelfLockingSubject>

isEvictable - = true if the subject is part of evictable cache (like lru)

Returns:

the lock object

getLockObject

public 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

Specified by:

getLockObject in interface IBasicLockManager<T extends ISelfLockingSubject>

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 ISelfLockingSubject>

Parameters:

lockObject - the lock object

isPerLogicalSubjectLockObject

public boolean isPerLogicalSubjectLockObject(boolean isEvictable)

Description copied from interface: IBasicLockManager

do we use per-logical subject a different object for locking ?

Specified by:

isPerLogicalSubjectLockObject in interface IBasicLockManager<T extends ISelfLockingSubject>

Parameters:

isEvictable - - is subject evictable

Returns:

true if we use subject