/*
* 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.dialect;
import org.hibernate.LockMode;
import org.hibernate.dialect.lock.LockingStrategy;
import org.hibernate.engine.spi.QueryParameters;
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.batch.OperationsQueue;
import org.hibernate.ogm.dialect.batch.RemoveAssociationOperation;
import org.hibernate.ogm.dialect.batch.RemoveTupleOperation;
import org.hibernate.ogm.dialect.batch.UpdateAssociationOperation;
import org.hibernate.ogm.dialect.batch.UpdateTupleOperation;
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.loader.nativeloader.BackendCustomQuery;
import org.hibernate.ogm.massindex.batchindexing.Consumer;
import org.hibernate.ogm.query.spi.ParameterMetadataBuilder;
import org.hibernate.ogm.type.GridType;
import org.hibernate.ogm.util.ClosableIterator;
import org.hibernate.persister.entity.Lockable;
import org.hibernate.type.Type;
/**
* Wraps a {@link BatchableGridDialect} intercepting the operation and populating the queue that the delegate
* will use to execute operations in batch.
* <p>
* The {@link TupleContext} and {@link AssociationContext} are also populated with the {@link OperationsQueue}
* before looking for element in the db. This way the underlying datastore can make assumptions about elements
* that are in the queue but not in the db.
*
* @author Davide D'Alto <davide@hibernate.org>
*/
public class BatchOperationsDelegator implements BatchableGridDialect {
private final ThreadLocal<OperationsQueue> operationQueueLocal = new ThreadLocal<OperationsQueue>();
private final BatchableGridDialect dialect;
public BatchOperationsDelegator(BatchableGridDialect dialect) {
this.dialect = dialect;
}
public void prepareBatch() {
operationQueueLocal.set( new OperationsQueue() );
}
private boolean isBatchDisabled() {
return getOperationQueue().isClosed();
}
public void clearBatch() {
operationQueueLocal.remove();
}
private OperationsQueue getOperationQueue() {
OperationsQueue operationsQueue = operationQueueLocal.get();
if ( operationsQueue == null ) {
return OperationsQueue.CLOSED_QUEUE;
}
else {
return operationsQueue;
}
}
public void executeBatch() {
executeBatch( getOperationQueue() );
}
@Override
public void executeBatch(OperationsQueue queue) {
dialect.executeBatch( getOperationQueue() );
}
@Override
public LockingStrategy getLockingStrategy(Lockable lockable, LockMode lockMode) {
return dialect.getLockingStrategy( lockable, lockMode );
}
@Override
public Tuple getTuple(EntityKey key, TupleContext tupleContext) {
TupleContext contextWithQueue = new TupleContext(
tupleContext.getSelectableColumns(),
tupleContext.getOptionsContext(),
getOperationQueue()
);
return dialect.getTuple( key, contextWithQueue );
}
@Override
public Tuple createTuple(EntityKey key, TupleContext tupleContext) {
return dialect.createTuple( key, tupleContext );
}
@Override
public void updateTuple(Tuple tuple, EntityKey key, TupleContext tupleContext) {
if ( isBatchDisabled() ) {
dialect.updateTuple( tuple, key, tupleContext );
}
else {
getOperationQueue().add( new UpdateTupleOperation( tuple, key, tupleContext ) );
}
}
@Override
public void removeTuple(EntityKey key, TupleContext tupleContext) {
if ( isBatchDisabled() ) {
dialect.removeTuple( key, tupleContext );
}
else {
getOperationQueue().add( new RemoveTupleOperation( key, tupleContext ) );
}
}
@Override
public Association getAssociation(AssociationKey key, AssociationContext associationContext) {
associationContext.setOperationsQueue( getOperationQueue() );
return dialect.getAssociation( key, associationContext );
}
@Override
public Association createAssociation(AssociationKey key, AssociationContext associationContext) {
return dialect.createAssociation( key, associationContext );
}
@Override
public void updateAssociation(Association association, AssociationKey key, AssociationContext associationContext) {
if ( isBatchDisabled() ) {
dialect.updateAssociation( association, key, associationContext );
}
else {
getOperationQueue().add( new UpdateAssociationOperation( association, key, associationContext ) );
}
}
@Override
public void removeAssociation(AssociationKey key, AssociationContext associationContext) {
if ( isBatchDisabled() ) {
dialect.removeAssociation( key, associationContext );
}
else {
getOperationQueue().add( new RemoveAssociationOperation( key, associationContext ) );
}
}
@Override
public Tuple createTupleAssociation(AssociationKey associationKey, RowKey rowKey) {
return dialect.createTupleAssociation( associationKey, rowKey );
}
@Override
public Number nextValue(NextValueRequest request) {
return dialect.nextValue( request );
}
@Override
public boolean supportsSequences() {
return false;
}
@Override
public GridType overrideType(Type type) {
return dialect.overrideType( type );
}
@Override
public void forEachTuple(Consumer consumer, EntityKeyMetadata... entityKeyMetadatas) {
dialect.forEachTuple( consumer, entityKeyMetadatas );
}
@Override
public ClosableIterator<Tuple> executeBackendQuery(BackendCustomQuery customQuery, QueryParameters queryParameters) {
return dialect.executeBackendQuery( customQuery, queryParameters );
}
@Override
public boolean isStoredInEntityStructure(AssociationKey associationKey, AssociationContext associationContext) {
return dialect.isStoredInEntityStructure( associationKey, associationContext );
}
@Override
public ParameterMetadataBuilder getParameterMetadataBuilder() {
return dialect.getParameterMetadataBuilder();
}
}