// Copyright 2008 Thiago H. de Paula Figueiredo

 //

 // 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 br.com.arsmachina.accesslogger.hibernate;

 import org.hibernate.HibernateException;

 import org.hibernate.Session;

 import org.hibernate.SessionFactory;

 import org.hibernate.Transaction;

 import org.slf4j.Logger;

 import org.slf4j.LoggerFactory;

 import br.com.arsmachina.accesslogger.Access;

 import br.com.arsmachina.accesslogger.AccessLogger;

 /**

  * {@link AccessLogger} implementation using Hibernate to persist {@link Access} instances in a

  * relationational database.

  * 

  * @author Thiago H. de Paula Figueiredo

  */

 public class HibernateAccessLogger implements AccessLogger {

         private Logger logger = LoggerFactory.getLogger(HibernateAccessLogger.class);

         private SessionFactory sessionFactory;

         /**

          * Single constructor of this class.

          * 

          * @param sessionFactory a {@link SessionFactory}. It cannot be null.

          */

         public HibernateAccessLogger(SessionFactory sessionFactory) {

                 if (sessionFactory == null) {

                         throw new IllegalArgumentException("Parameter sessionFactory cannot be null");

                 }

                 this.sessionFactory = sessionFactory;

         }

         /**

          * @see br.com.arsmachina.accesslogger.AccessLogger#log(br.com.arsmachina.accesslogger.Access)

          */

         public void log(Access access) {

                 final Session session = sessionFactory.openSession();

                 Transaction transaction = null;

                 if (access instanceof br.com.arsmachina.accesslogger.hibernate.Access == false) {

                         access = new br.com.arsmachina.accesslogger.hibernate.Access(access);

                 }

                 try {

                         transaction = session.beginTransaction();

                         session.save(access);

                         transaction.commit();

                 }

                 catch (HibernateException e) {

                         if (logger.isErrorEnabled()) {

                                 logger.error("Exception while inserting access", e);

                         }

                         if (transaction != null) {

                                 transaction.rollback();

                         }

                 }

                 finally {

                         if (session != null) {

                                 session.close();

                         }

                 }

         }

 }