ca.uhn.cache.internal.impl
Class CacheCleaner

java.lang.Object
  ca.uhn.cache.internal.impl.CacheCleaner

All Implemented Interfaces:

ICacheCleaner

public class CacheCleaner

extends java.lang.Object

implements ICacheCleaner

Default implementation of ICacheCleaner.

Version:

$Revision: 1.1 $ updated on $Date: 2005/01/24 22:54:03 $ by $Author: bryan_tripp $

Author:

Bryan Tripp

Constructor Summary

CacheCleaner(IChunkStore theChunkStore, IChunkPurger thePurger, int theTargetSize, IQueryResultStore theItemStore, float theAgeDecrement)

Method Summary

void	evictStaleChunks() Removes from the cache any chunks that are older than their maximum age.
void	evictUnusedChunks() Removes from the cache any chunks that are unlikely to be used in the near future, according to getUnusedChunkRule().
long	getTargetSize()

Methods inherited from class java.lang.Object

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

Constructor Detail

CacheCleaner

public CacheCleaner(IChunkStore theChunkStore,
                    IChunkPurger thePurger,
                    int theTargetSize,
                    IQueryResultStore theItemStore,
                    float theAgeDecrement)

Parameters:

theChunkStore - chunk store cleaned by this cleaner

thePurger - a specialized interface to the same store

theTargetSize - as in getTargetSize()

theItemStore - query result store that corresponds to the chunk store

theAgeDecrement - unused chunks are evicted in blocks according to the age of last usage, and this param is the size of each block as a proportion of greatest age in the cache (.01 = 1%, i.e. chunks divided into 100 blocks)

Method Detail

getTargetSize

public long getTargetSize()

Specified by:

getTargetSize in interface ICacheCleaner

Returns:

target size of cache: if there are more records than this in the cache, less useful records will be evicted

See Also:

ICacheCleaner.getTargetSize()

evictStaleChunks

public void evictStaleChunks()

Description copied from interface: ICacheCleaner

Removes from the cache any chunks that are older than their maximum age.

Specified by:

evictStaleChunks in interface ICacheCleaner

See Also:

ICacheCleaner.evictStaleChunks()

evictUnusedChunks

public void evictUnusedChunks()

Description copied from interface: ICacheCleaner

Removes from the cache any chunks that are unlikely to be used in the near future, according to getUnusedChunkRule().

Specified by:

evictUnusedChunks in interface ICacheCleaner

See Also:

ICacheCleaner.evictUnusedChunks()