org.apache.ignite.internal.processors.cache.persistence.pagemem

Class SegmentedLruPageReplacementPolicy

java.lang.Object

org.apache.ignite.internal.processors.cache.persistence.pagemem.PageReplacementPolicy

org.apache.ignite.internal.processors.cache.persistence.pagemem.SegmentedLruPageReplacementPolicy

public class SegmentedLruPageReplacementPolicy
extends PageReplacementPolicy

Segmented-LRU page replacement policy implementation.

See Also:

PageReplacementMode.SEGMENTED_LRU

Field Summary

Fields inherited from class org.apache.ignite.internal.processors.cache.persistence.pagemem.PageReplacementPolicy

seg

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	SegmentedLruPageReplacementPolicy(org.apache.ignite.internal.processors.cache.persistence.pagemem.PageMemoryImpl.Segment seg, long ptr, int pagesCnt)

Method Summary

Modifier and Type	Method and Description
void	onHit(long relPtr) Existing page touched.
void	onMiss(long relPtr) New page added.
void	onRemove(long relPtr) Page removed from the page memory.
long	replace() Finds page to replace.

Methods inherited from class java.lang.Object

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

Constructor Detail

SegmentedLruPageReplacementPolicy

protected SegmentedLruPageReplacementPolicy(org.apache.ignite.internal.processors.cache.persistence.pagemem.PageMemoryImpl.Segment seg,
                                            long ptr,
                                            int pagesCnt)

Parameters:

seg - Page memory segment.

Method Detail

onHit

public void onHit(long relPtr)

Existing page touched. Note: This method can be invoked under segment write lock or segment read lock.

Overrides:

onHit in class PageReplacementPolicy

onMiss

public void onMiss(long relPtr)

New page added. Note: This method always invoked under segment write lock.

Overrides:

onMiss in class PageReplacementPolicy

onRemove

public void onRemove(long relPtr)

Page removed from the page memory.

Overrides:

onRemove in class PageReplacementPolicy

replace

public long replace()
             throws IgniteCheckedException

Finds page to replace. Note: This method always invoked under segment write lock.

Specified by:

replace in class PageReplacementPolicy

Returns:

Relative pointer to page.

Throws:

IgniteCheckedException