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* as indicated by the @author tags. See the copyright.txt file in the
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*
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
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package org.jboss.cache.interceptors;
import org.jboss.cache.Fqn;
import org.jboss.cache.Region;
import org.jboss.cache.buddyreplication.BuddyFqnTransformer;
import org.jboss.cache.factories.annotations.Inject;
/**
* A subclass of EvictionInterceptor that is aware of and able to deal with buddy regions.
*
* @author Manik Surtani (<a href="mailto:manik AT jboss DOT org">manik AT jboss DOT org</a>)
* @since 2.2.0
*/
public class BuddyRegionAwareEvictionInterceptor extends EvictionInterceptor
{
private BuddyFqnTransformer buddyFqnTransformer;
@Inject
public void initialize(BuddyFqnTransformer transformer)
{
this.buddyFqnTransformer = transformer;
}
@Override
protected Region getRegion(Fqn fqn)
{
Region r = super.getRegion(fqn);
if (r != null)
return r;
else if (buddyFqnTransformer.isBackupFqn(fqn))
{
// try and grab a backup region, creating one if need be.
Fqn actualFqn = buddyFqnTransformer.getActualFqn(fqn);
Fqn backupRoot = buddyFqnTransformer.getBackupRootFromFqn(fqn);
// the actual region could be a few levels higher than actualFqn
Region actualRegion = regionManager.getRegion(actualFqn, Region.Type.EVICTION, false);
if (actualRegion == null) return null;
//create a new region for this backup
Region newRegion = regionManager.getRegion(Fqn.fromRelativeFqn(backupRoot, actualRegion.getFqn()), Region.Type.EVICTION, true);
newRegion.setEvictionRegionConfig(actualRegion.getEvictionRegionConfig());
return newRegion;
}
else return null;
}
}