
package org.redisson.hibernate.strategy;

import org.hibernate.cache.CacheException;
import org.hibernate.cache.internal.DefaultCacheKeysFactory;
import org.hibernate.cache.spi.EntityRegion;
import org.hibernate.cache.spi.GeneralDataRegion;
import org.hibernate.cache.spi.access.EntityRegionAccessStrategy;
import org.hibernate.cache.spi.access.SoftLock;
import org.hibernate.cfg.Settings;
import org.hibernate.engine.spi.SessionFactoryImplementor;
import org.hibernate.engine.spi.SessionImplementor;
import org.hibernate.persister.entity.EntityPersister;
import org.redisson.hibernate.region.RedissonEntityRegion;

/**
 * 
 * @author Nikita Koksharov
 *
 */
public class NonStrictReadWriteEntityRegionAccessStrategy extends BaseRegionAccessStrategy implements EntityRegionAccessStrategy {

    public NonStrictReadWriteEntityRegionAccessStrategy(Settings settings, GeneralDataRegion region) {
        super(settings, region);
    }

    @Override
    public Object get(SessionImplementor session, Object key, long txTimestamp) throws CacheException {
        return region.get(session, key);
    }

    @Override
    public boolean putFromLoad(SessionImplementor session, Object key, Object value, long txTimestamp, Object version, boolean minimalPutOverride)
            throws CacheException {
        if (minimalPutOverride && region.contains(key)) {
            return false;
        }

        region.put(session, key, value);
        return true;
    }

    @Override
    public SoftLock lockItem(SessionImplementor session, Object key, Object version) throws CacheException {
        return null;
    }

    @Override
    public void unlockItem(SessionImplementor session, Object key, SoftLock lock) throws CacheException {
        evict(key);
    }

    @Override
    public EntityRegion getRegion() {
        return (EntityRegion) region;
    }

    @Override
    public boolean insert(SessionImplementor session, Object key, Object value, Object version) throws CacheException {
        return false;
    }

    @Override
    public boolean afterInsert(SessionImplementor session, Object key, Object value, Object version) throws CacheException {
        return false;
    }

    @Override
    public boolean update(SessionImplementor session, Object key, Object value, Object currentVersion, Object previousVersion)
            throws CacheException {
        remove(session, key);
        return false;
    }

    @Override
    public boolean afterUpdate(SessionImplementor session, Object key, Object value, Object currentVersion, Object previousVersion, SoftLock lock)
            throws CacheException {
        unlockItem(session, key, lock);
        return false;
    }
    
    @Override
    public void remove(SessionImplementor session, Object key) throws CacheException {
        evict(key);
    }

    @Override
    public Object generateCacheKey(Object id, EntityPersister persister, SessionFactoryImplementor factory, String tenantIdentifier) {
        return ((RedissonEntityRegion)region).getCacheKeysFactory().createEntityKey( id, persister, factory, tenantIdentifier );
    }

    @Override
    public Object getCacheKeyId(Object cacheKey) {
        return ((RedissonEntityRegion)region).getCacheKeysFactory().getEntityId( cacheKey );
    }

}
