org.cast.cwm.service.CwmService.java Source code

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Here is the source code for org.cast.cwm.service.CwmService.java

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/*
 * Copyright 2011-2016 CAST, Inc.
 *
 * This file is part of the CAST Wicket Modules:
 * see <http://code.google.com/p/cast-wicket-modules>.
 *
 * The CAST Wicket Modules are free software: you can redistribute and/or
 * modify them under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * The CAST Wicket Modules are distributed in the hope that they will be
 * useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this software.  If not, see <http://www.gnu.org/licenses/>.
 */
package org.cast.cwm.service;

import net.databinder.hib.Databinder;
import net.databinder.models.hib.HibernateObjectModel;
import org.apache.wicket.model.IChainingModel;
import org.apache.wicket.model.IModel;
import org.cast.cwm.data.Initialization;
import org.cast.cwm.data.PersistedObject;
import org.cast.cwm.data.init.IDatabaseInitializer;
import org.hibernate.Criteria;
import org.hibernate.HibernateException;
import org.hibernate.Session;
import org.hibernate.criterion.Projections;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.util.Date;
import java.util.List;

public class CwmService implements ICwmService {

    private static final Logger log = LoggerFactory.getLogger(CwmService.class);

    /* (non-Javadoc)
     * @see org.cast.cwm.service.ICwmService#confirmDatastoreModel(org.apache.wicket.model.IModel)
     */
    @Override
    public void confirmDatastoreModel(IModel<? extends PersistedObject> objectModel) {
        if ((objectModel instanceof IChainingModel && !(((IChainingModel<? extends PersistedObject>) objectModel)
                .getChainedModel() instanceof HibernateObjectModel))
                && !(objectModel instanceof HibernateObjectModel))
            throw new IllegalStateException("This Service class expects HibernateObjectModels.");
    }

    /* (non-Javadoc)
     * @see org.cast.cwm.service.ICwmService#getById(java.lang.Class, long)
     */
    @Override
    public <T extends PersistedObject> IModel<T> getById(Class<T> clazz, long id) {
        return new HibernateObjectModel<T>(clazz, id);
    }

    /* (non-Javadoc)
     * @see org.cast.cwm.service.ICwmService#save(org.cast.cwm.data.PersistedObject)
     */
    @Override
    public void save(PersistedObject object) {
        Databinder.getHibernateSession().save(object);
    }

    /* (non-Javadoc)
     * @see org.cast.cwm.service.ICwmService#delete(org.apache.wicket.model.IModel)
     */
    @Override
    public void delete(IModel<? extends PersistedObject> objectModel) {
        confirmDatastoreModel(objectModel);
        Databinder.getHibernateSession().delete(objectModel.getObject());
        flushChanges();
    }

    /* (non-Javadoc)
     * @see org.cast.cwm.service.ICwmService#delete(org.cast.cwm.data.PersistedObject)
     */
    @Override
    public void delete(PersistedObject object) {
        Databinder.getHibernateSession().delete(object);
        flushChanges();
    }

    /* (non-Javadoc)
     * @see org.cast.cwm.service.ICwmService#flushChanges()
     */
    @Override
    public void flushChanges() {
        flushChanges(false);
    }

    /* (non-Javadoc)
     * @see org.cast.cwm.service.ICwmService#flushChanges(boolean)
     */
    @Override
    public void flushChanges(boolean catchErrors) {

        Session session = Databinder.getHibernateSession();
        try {
            session.flush(); // Modified from example in DataForm
            session.getTransaction().commit();

        } catch (HibernateException ex) {
            session.getTransaction().rollback();
            if (catchErrors) {
                // Note: Hibernate Logging will often print the stack trace anyways
                log.info("Ignored exception during commit: {}", ex.getMessage());
            } else {
                throw ex;
            }
        } catch (Exception ex) {
            session.getTransaction().rollback();
            log.error("Can't ignore exception: {}", ex);
            ex.printStackTrace(System.err);
        } finally {
            session.beginTransaction();
        }
    }

    /* (non-Javadoc)
     * @see org.cast.cwm.service.ICwmService#getInitializationNames()
     */
    @Override
    @SuppressWarnings("unchecked")
    public List<String> getInitializationNames() {
        Criteria criteria = Databinder.getHibernateSession().createCriteria(Initialization.class);
        criteria.setProjection(Projections.distinct(Projections.property("name")));
        return criteria.list();
    }

    /* (non-Javadoc)
     * @see org.cast.cwm.service.ICwmService#saveInitialization(org.cast.cwm.data.init.IDatabaseInitializer)
     */
    @Override
    public void saveInitialization(IDatabaseInitializer izer) {
        Initialization init = new Initialization();
        init.setName(izer.getName());
        init.setRunDate(new Date());
        Databinder.getHibernateSession().save(init);
        flushChanges();
    }

}