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

Class NoOpPageEvictionTracker

java.lang.Object

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

All Implemented Interfaces:

PageEvictionTracker, LifecycleAware

public class NoOpPageEvictionTracker
extends Object
implements PageEvictionTracker

Constructor Summary

Constructors

Constructor and Description
NoOpPageEvictionTracker()

Method Summary

Modifier and Type	Method and Description
void	evictDataPage() Evicts one data page.
boolean	evictionRequired() Check if page eviction is required according to the configured policy.
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 java.lang.Object

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

Constructor Detail

NoOpPageEvictionTracker

public NoOpPageEvictionTracker()

Method Detail

start

public void start()
           throws IgniteException

Starts grid component, called on grid start.

Specified by:

start in interface LifecycleAware

Throws:

IgniteException - If failed.

stop

public void stop()
          throws IgniteException

Stops grid component, called on grid shutdown.

Specified by:

stop in interface LifecycleAware

Throws:

IgniteException - If failed.

touchPage

public void touchPage(long pageId)
               throws IgniteCheckedException

Call this method when data page is accessed.

Specified by:

touchPage in interface PageEvictionTracker

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.

Specified by:

evictDataPage in interface PageEvictionTracker

Throws:

IgniteCheckedException - In case of page memory error.

forgetPage

public void forgetPage(long pageId)
                throws IgniteCheckedException

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

Specified by:

forgetPage in interface PageEvictionTracker

Parameters:

pageId - Page id.

Throws:

IgniteCheckedException - In case of page memory error.

evictionRequired

public boolean evictionRequired()

Check if page eviction is required according to the configured policy.

Specified by:

evictionRequired in interface PageEvictionTracker

Returns:

True if eviction required.