/*
* Copyright (c) 2010 Lockheed Martin Corporation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.eurekastreams.server.persistence.mappers;
import java.util.List;
import org.eurekastreams.commons.model.DomainEntity;
import org.eurekastreams.server.persistence.mappers.requests.PersistenceListRequest;
import org.hibernate.Session;
/**
* Inserts a bunch of things using the preferred hibernate way of bulk updating.
*
* @param <TDomainEntityType> the domain entity.
*/
@SuppressWarnings("unchecked")
public class InsertBulkMapper<TDomainEntityType extends DomainEntity> extends
BaseArgDomainMapper<PersistenceListRequest, Boolean>
{
/**
* The number of items to do per flush and clear.
*/
private static final int BULKNUM = 20;
// TODO: verify that these things get indexed.
/**
* Inserts the DomainEntity.
*
* @param inRequest
* The MapperRequest.
* @return true if inserted.
*/
public Boolean execute(final PersistenceListRequest inRequest)
{
List entities = inRequest.getDomainEnities();
Session session = getHibernateSession();
for (int i = 0; i < entities.size(); i++)
{
session.save(entities.get(i));
if (i % BULKNUM == 0)
{
session.flush();
session.clear();
}
}
getEntityManager().getTransaction().commit();
session.close();
return true;
}
}