Package org.apache.ignite.internal.processors.cache.persistence.evict

Class RandomLruPageEvictionTracker

java.lang.Object

org.apache.ignite.internal.processors.cache.persistence.evict.PageAbstractEvictionTracker

org.apache.ignite.internal.processors.cache.persistence.evict.RandomLruPageEvictionTracker

All Implemented Interfaces:

PageEvictionTracker, LifecycleAware

public class RandomLruPageEvictionTracker
extends PageAbstractEvictionTracker

Field Summary

Fields inherited from class org.apache.ignite.internal.processors.cache.persistence.evict.PageAbstractEvictionTracker

pageMem, trackingSize

Constructor Summary

Constructors

Constructor	Description
RandomLruPageEvictionTracker(PageMemory pageMem, DataRegionConfiguration plcCfg, GridCacheSharedContext<?,?> sharedCtx)

Method Summary

Modifier and Type	Method	Description
protected boolean	checkTouch(long pageId)
void	evictDataPage()	Evicts one data page.
void	forgetPage(long pageId)	Call this method when last entry is removed from data page.
void	start()	Starts grid component, called on grid start.
void	stop()	Stops grid component, called on grid shutdown.
void	touchPage(long pageId)	Call this method when data page is accessed.

Methods inherited from class org.apache.ignite.internal.processors.cache.persistence.evict.PageAbstractEvictionTracker

evictionRequired

Methods inherited from class java.lang.Object

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

Constructor Detail

RandomLruPageEvictionTracker

public RandomLruPageEvictionTracker(PageMemory pageMem,
                                    DataRegionConfiguration plcCfg,
                                    GridCacheSharedContext<?,?> sharedCtx)

Parameters:

pageMem - Page memory.

plcCfg - Policy config.

sharedCtx - Shared context.

Method Detail

start

public void start()
           throws IgniteException

Starts grid component, called on grid start.

Throws:

IgniteException - If failed.

stop

public void stop()
          throws IgniteException

Stops grid component, called on grid shutdown.

Throws:

IgniteException - If failed.

touchPage

public void touchPage(long pageId)
               throws IgniteCheckedException

Call this method when data page is accessed.

Parameters:

pageId - Page id.

Throws:

IgniteCheckedException - In case of page memory error.

evictDataPage

public void evictDataPage()
                   throws IgniteCheckedException

Evicts one data page. In most cases, all entries will be removed from the page. Method guarantees removing at least one entry from "evicted" data page. Removing all entries may be not possible, as some of them can be used by active transactions.

Throws:

IgniteCheckedException - In case of page memory error.

checkTouch

protected boolean checkTouch(long pageId)

Specified by:

checkTouch in class PageAbstractEvictionTracker

Parameters:

pageId - Page ID.

Returns:

true if page was touched at least once.

forgetPage

public void forgetPage(long pageId)

Call this method when last entry is removed from data page.

Parameters:

pageId - Page id.