/*
* Hibernate OGM, Domain model persistence for NoSQL datastores
*
* 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.ogm.datastore.map;
import java.util.HashMap;
import java.util.Map;
import org.hibernate.LockMode;
import org.hibernate.dialect.lock.LockingStrategy;
import org.hibernate.dialect.lock.OptimisticForceIncrementLockingStrategy;
import org.hibernate.dialect.lock.OptimisticLockingStrategy;
import org.hibernate.dialect.lock.PessimisticForceIncrementLockingStrategy;
import org.hibernate.ogm.datastore.map.impl.MapAssociationSnapshot;
import org.hibernate.ogm.datastore.map.impl.MapDatastoreProvider;
import org.hibernate.ogm.datastore.map.impl.MapHelpers;
import org.hibernate.ogm.datastore.map.impl.MapPessimisticReadLockingStrategy;
import org.hibernate.ogm.datastore.map.impl.MapPessimisticWriteLockingStrategy;
import org.hibernate.ogm.datastore.map.impl.MapTupleSnapshot;
import org.hibernate.ogm.datastore.spi.Association;
import org.hibernate.ogm.datastore.spi.AssociationContext;
import org.hibernate.ogm.datastore.spi.Tuple;
import org.hibernate.ogm.datastore.spi.TupleContext;
import org.hibernate.ogm.dialect.spi.BaseGridDialect;
import org.hibernate.ogm.grid.AssociationKey;
import org.hibernate.ogm.grid.EntityKey;
import org.hibernate.ogm.grid.EntityKeyMetadata;
import org.hibernate.ogm.grid.RowKey;
import org.hibernate.ogm.id.spi.NextValueRequest;
import org.hibernate.ogm.massindex.batchindexing.Consumer;
import org.hibernate.persister.entity.Lockable;
/**
* Grid dialect which uses a plain map for storing objects in memory. For testing purposes.
*
* @author Sanne Grinovero <sanne@hibernate.org> (C) 2011 Red Hat Inc.
*/
public class MapDialect extends BaseGridDialect {
private final MapDatastoreProvider provider;
public MapDialect(MapDatastoreProvider provider) {
this.provider = provider;
}
@Override
public LockingStrategy getLockingStrategy(Lockable lockable, LockMode lockMode) {
if ( lockMode == LockMode.PESSIMISTIC_FORCE_INCREMENT ) {
return new PessimisticForceIncrementLockingStrategy( lockable, lockMode );
}
else if ( lockMode == LockMode.PESSIMISTIC_WRITE ) {
return new MapPessimisticWriteLockingStrategy( lockable, lockMode );
}
else if ( lockMode == LockMode.PESSIMISTIC_READ ) {
return new MapPessimisticReadLockingStrategy( lockable, lockMode );
}
else if ( lockMode == LockMode.OPTIMISTIC ) {
return new OptimisticLockingStrategy( lockable, lockMode );
}
else if ( lockMode == LockMode.OPTIMISTIC_FORCE_INCREMENT ) {
return new OptimisticForceIncrementLockingStrategy( lockable, lockMode );
}
return new MapPessimisticWriteLockingStrategy( lockable, lockMode );
}
@Override
public Tuple getTuple(EntityKey key, TupleContext tupleContext) {
Map<String, Object> entityMap = provider.getEntityTuple( key );
if ( entityMap == null ) {
return null;
}
else {
return new Tuple( new MapTupleSnapshot( entityMap ) );
}
}
@Override
public Tuple createTuple(EntityKey key, TupleContext tupleContext) {
HashMap<String,Object> tuple = new HashMap<String,Object>();
provider.putEntity( key, tuple );
return new Tuple( new MapTupleSnapshot( tuple ) );
}
@Override
public void updateTuple(Tuple tuple, EntityKey key, TupleContext tupleContext) {
Map<String,Object> entityRecord = ( (MapTupleSnapshot) tuple.getSnapshot() ).getMap();
MapHelpers.applyTupleOpsOnMap( tuple, entityRecord );
}
@Override
public void removeTuple(EntityKey key, TupleContext tupleContext) {
provider.removeEntityTuple( key );
}
@Override
public Association getAssociation(AssociationKey key, AssociationContext associationContext) {
Map<RowKey, Map<String, Object>> associationMap = provider.getAssociation( key );
return associationMap == null ? null : new Association( new MapAssociationSnapshot( associationMap ) );
}
@Override
public Association createAssociation(AssociationKey key, AssociationContext associationContext) {
Map<RowKey, Map<String, Object>> associationMap = new HashMap<RowKey, Map<String,Object>>();
provider.putAssociation( key, associationMap );
return new Association( new MapAssociationSnapshot( associationMap ) );
}
@Override
public void updateAssociation(Association association, AssociationKey key, AssociationContext associationContext) {
MapHelpers.updateAssociation( association, key );
}
@Override
public void removeAssociation(AssociationKey key, AssociationContext associationContext) {
provider.removeAssociation( key );
}
@Override
public Tuple createTupleAssociation(AssociationKey associationKey, RowKey rowKey) {
return new Tuple();
}
@Override
public boolean isStoredInEntityStructure(AssociationKey associationKey, AssociationContext associationContext) {
return false;
}
@Override
public Number nextValue(NextValueRequest request) {
return provider.getSharedAtomicInteger( request.getKey(), request.getInitialValue(), request.getIncrement() );
}
@Override
public boolean supportsSequences() {
return false;
}
@Override
public void forEachTuple(Consumer consumer, EntityKeyMetadata... metadatas) {
Map<EntityKey, Map<String, Object>> entityMap = provider.getEntityMap();
for ( EntityKey key : entityMap.keySet() ) {
for ( EntityKeyMetadata metadata : metadatas ) {
if ( key.getTable().equals( metadata.getTable() ) ) {
consumer.consume( new Tuple( new MapTupleSnapshot( entityMap.get( key ) ) ) );
}
}
}
}
}