org.hibernate.cache
Class UpdateTimestampsCache

java.lang.Object
  org.hibernate.cache.UpdateTimestampsCache

public class UpdateTimestampsCache
extends Object

Tracks the timestamps of the most recent updates to particular tables. It is important that the cache timeout of the underlying cache implementation be set to a higher value than the timeouts of any of the query caches. In fact, we recommend that the the underlying cache not be configured for expiry at all. Note, in particular, that an LRU cache expiry policy is never appropriate.

Author:

Gavin King, Mikheil Kapanadze

Field Summary

static String

REGION_NAME

Constructor Summary

UpdateTimestampsCache(Settings settings, Properties props)

Method Summary

void	clear()
void	destroy()
TimestampsRegion	getRegion()
void	invalidate(Serializable[] spaces)
boolean	isUpToDate(Set spaces, Long timestamp)
void	preinvalidate(Serializable[] spaces)
String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

REGION_NAME

public static final String REGION_NAME

Constructor Detail

UpdateTimestampsCache

public UpdateTimestampsCache(Settings settings,
                             Properties props)
                      throws HibernateException

Throws:

HibernateException

Method Detail

preinvalidate

public void preinvalidate(Serializable[] spaces)
                   throws CacheException

Throws:

CacheException

invalidate

public void invalidate(Serializable[] spaces)
                throws CacheException

Throws:

CacheException

isUpToDate

public boolean isUpToDate(Set spaces,
                          Long timestamp)
                   throws HibernateException

Throws:

HibernateException

clear

public void clear()
           throws CacheException

Throws:

CacheException

destroy

public void destroy()

getRegion

public TimestampsRegion getRegion()

toString

public String toString()

Overrides:

toString in class Object