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org.hibernate.cache.spi.support.NaturalIdReadWriteAccess Maven / Gradle / Ivy
/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* License: GNU Lesser General Public License (LGPL), version 2.1 or later
* See the lgpl.txt file in the root directory or http://www.gnu.org/licenses/lgpl-2.1.html
*/
package org.hibernate.cache.spi.support;
import java.util.Comparator;
import org.hibernate.cache.cfg.spi.NaturalIdDataCachingConfig;
import org.hibernate.cache.spi.CacheKeysFactory;
import org.hibernate.cache.spi.DomainDataRegion;
import org.hibernate.cache.spi.access.AccessType;
import org.hibernate.cache.spi.access.NaturalIdDataAccess;
import org.hibernate.cache.spi.access.SoftLock;
import org.hibernate.engine.spi.SharedSessionContractImplementor;
import org.hibernate.persister.entity.EntityPersister;
/**
* Standard support for {@link org.hibernate.cache.spi.access.NaturalIdDataAccess}
* using the {@link org.hibernate.cache.spi.access.AccessType#READ_WRITE} access type.
*
* @author Steve Ebersole
*/
public class NaturalIdReadWriteAccess extends AbstractReadWriteAccess implements NaturalIdDataAccess {
private final CacheKeysFactory keysFactory;
public NaturalIdReadWriteAccess(
DomainDataRegion region,
CacheKeysFactory keysFactory,
DomainDataStorageAccess storageAccess,
NaturalIdDataCachingConfig naturalIdDataCachingConfig) {
super( region, storageAccess );
this.keysFactory = keysFactory;
}
@Override
protected AccessedDataClassification getAccessedDataClassification() {
return AccessedDataClassification.NATURAL_ID;
}
@Override
public AccessType getAccessType() {
return AccessType.READ_WRITE;
}
@Override
protected Comparator getVersionComparator() {
// natural-id has no comparator
return null;
}
@Override
public Object generateCacheKey(
Object[] naturalIdValues,
EntityPersister rootEntityDescriptor,
SharedSessionContractImplementor session) {
return keysFactory.createNaturalIdKey( naturalIdValues, rootEntityDescriptor, session );
}
@Override
public Object[] getNaturalIdValues(Object cacheKey) {
return keysFactory.getNaturalIdValues( cacheKey );
}
@Override
public boolean insert(SharedSessionContractImplementor session, Object key, Object value) {
return false;
}
@Override
public boolean afterInsert(SharedSessionContractImplementor session, Object key, Object value) {
try {
writeLock().lock();
Lockable item = (Lockable) getStorageAccess().getFromCache( key, session );
if ( item == null ) {
getStorageAccess().putIntoCache(
key,
new Item( value, null, getRegion().getRegionFactory().nextTimestamp() ),
session
);
return true;
}
else {
return false;
}
}
finally {
writeLock().unlock();
}
}
@Override
public boolean update(SharedSessionContractImplementor session, Object key, Object value) {
return false;
}
@Override
public boolean afterUpdate(SharedSessionContractImplementor session, Object key, Object value, SoftLock lock) {
try {
writeLock().lock();
Lockable item = (Lockable) getStorageAccess().getFromCache( key, session );
if ( item != null && item.isUnlockable( lock ) ) {
SoftLockImpl lockItem = (SoftLockImpl) item;
if ( lockItem.wasLockedConcurrently() ) {
decrementLock( session, key, lockItem );
return false;
}
else {
getStorageAccess().putIntoCache(
key,
new Item( value, null, getRegion().getRegionFactory().nextTimestamp() ),
session
);
return true;
}
}
else {
handleLockExpiry( session, key, item );
return false;
}
}
finally {
writeLock().unlock();
}
}
}