com.utest.dao.UtestFlushEntityEventListener.java Source code

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Here is the source code for com.utest.dao.UtestFlushEntityEventListener.java

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/**
 *
 * 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.
 *
 * 
 * @author Vadim Kisen
 *
 * copyright 2010 by uTest 
 */
package com.utest.dao;

import org.hibernate.HibernateException;
import org.hibernate.StaleObjectStateException;
import org.hibernate.engine.EntityEntry;
import org.hibernate.engine.SessionImplementor;
import org.hibernate.event.FlushEntityEvent;
import org.hibernate.event.def.DefaultFlushEntityEventListener;
import org.hibernate.persister.entity.EntityPersister;

import com.utest.domain.TimelineEntity;

/**
 * Enforces optimistic locking for attached entities.
 */
public class UtestFlushEntityEventListener extends DefaultFlushEntityEventListener {

    /**
     * 
     */
    private static final long serialVersionUID = -8516535801412513783L;

    @Override
    public void onFlushEntity(final FlushEntityEvent event) throws HibernateException {

        final Object object = event.getEntity();
        final EntityEntry entry = event.getEntityEntry();
        final EntityPersister persister = entry.getPersister();
        // final Status status = entry.getStatus();
        final SessionImplementor session = event.getSession();
        if (persister.isVersioned()) {
            final Object version = persister.getVersion(object, session.getEntityMode());
            // Make sure version has not changed on updated entities
            if ((object instanceof TimelineEntity) && !((TimelineEntity) object).isNew()) {
                if (!persister.getVersionType().isEqual(version, entry.getVersion())) {
                    throw new StaleObjectStateException(persister.getEntityName(), entry.getId());
                }
            }
        }
        super.onFlushEntity(event);
    }
}