it.doqui.index.ecmengine.business.personalization.hibernate.RoutingLocalDataSourceConnectionProvider.java Source code

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Here is the source code for it.doqui.index.ecmengine.business.personalization.hibernate.RoutingLocalDataSourceConnectionProvider.java

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/* Index ECM Engine - A system for managing the capture (when created 
 * or received), classification (cataloguing), storage, retrieval, 
 * revision, sharing, reuse and disposition of documents.
 *
 * Copyright (C) 2008 Regione Piemonte
 * Copyright (C) 2008 Provincia di Torino
 * Copyright (C) 2008 Comune di Torino
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2,
 * or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 *
 */

package it.doqui.index.ecmengine.business.personalization.hibernate;

import it.doqui.index.ecmengine.business.personalization.hibernate.util.EcmEngineHibernateConstants;

import java.sql.Connection;
import java.sql.SQLException;
import java.util.Properties;

import javax.sql.DataSource;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.hibernate.HibernateException;
import org.hibernate.connection.ConnectionProvider;
import org.hibernate.util.JDBCExceptionReporter;

/**
 * Classe che implementa un connection provider per DataSource locali con supporto
 * al multirepository.
 * 
 * @author DoQui
 *
 * @see org.springframework.orm.hibernate3.LocalDataSourceConnectionProvider
 */
public class RoutingLocalDataSourceConnectionProvider implements ConnectionProvider {

    private DataSource dataSource;
    private Log logger = LogFactory.getLog(EcmEngineHibernateConstants.HIBERNATE_LOG_CATEGORY);

    /**
     * Configura il provider.
     * 
     * <strong>NB:</strong> le propriet&agrave; specificate in input vengono ignorate da questa implementazione.
     * 
     * @param props Un oggetto {@code Properties} contenente i parametri di configurazione (ignorate).
     * 
     * @throws HibernateException Se si verifica un errore durante la configurazione di hibernate.
     */
    public void configure(Properties props) throws HibernateException {
        logger.debug("[RoutingLocalDataSourceConnectionProvider::configure] BEGIN");

        try {
            this.dataSource = RoutingLocalSessionFactoryBean.getConfigTimeDataSource();
            if (this.dataSource == null) {
                throw new HibernateException("No local DataSource found for configuration - "
                        + "dataSource property must be set on RoutingLocalSessionFactoryBean");
            }
        } finally {
            logger.debug("[RoutingLocalDataSourceConnectionProvider::configure] END");
        }
    }

    /**
     * Restituisce il {@code DataSource} corrispondente al repository fisico corrente.
     * 
     * @return Il {@code DataSource} corrispondente al repository fisico corrente.
     */
    public DataSource getDataSource() {
        logger.debug("[RoutingLocalDataSourceConnectionProvider::getDataSource] BEGIN");

        try {
            return RoutingLocalSessionFactoryBean.getCurrentDataSource();
        } finally {
            logger.debug("[RoutingLocalDataSourceConnectionProvider::getDataSource] END");
        }
    }

    /**
     * Restituisce una connessione al repository fisico corrente.
     * 
     * @see javax.sql.DataSource#getConnection()
     * 
     * @return Una {@code Connection}.
     * 
     * @throws SQLException In caso di errori sul DB.
     */
    public Connection getConnection() throws SQLException {
        logger.debug("[RoutingLocalDataSourceConnectionProvider::getConnection] BEGIN");
        try {
            if (logger.isDebugEnabled()) {
                logger.debug("[RoutingLocalDataSourceConnectionProvider::getConnection] Getting connection: "
                        + RoutingLocalSessionFactoryBean.getCurrentDataSource());
            }

            return RoutingLocalSessionFactoryBean.getCurrentDataSource().getConnection();
        } catch (SQLException ex) {
            JDBCExceptionReporter.logExceptions(ex);
            throw ex;
        } finally {
            logger.debug("[RoutingLocalDataSourceConnectionProvider::getConnection] END");
        }
    }

    /**
     * Chiude la connessione specificata.
     * 
     * @param con La connessione da chiudere.
     * 
     * @see java.sql.Connection#close()
     * 
     * @throws SQLException In caso di errori sul DB.
     */
    public void closeConnection(Connection con) throws SQLException {
        logger.debug("[RoutingLocalDataSourceConnectionProvider::closeConnection] BEGIN");

        try {
            con.close();
        } catch (SQLException ex) {
            JDBCExceptionReporter.logExceptions(ex);
            throw ex;
        } finally {
            logger.debug("[RoutingLocalDataSourceConnectionProvider::closeConnection] END");
        }
    }

    /**
     * Implementazione vuota: il {@code DataSource} &egrave; gestito esternamente.
     */
    public void close() {
    }

    /**
     * Restituisce {@code false}: non possiamo garantire di ottenere sempre la stessa
     * connessione durante una transazione.
     * 
     * @return {@code false}.
     */
    public boolean supportsAggressiveRelease() {
        return false;
    }
}