co.nubetech.crux.dao.ConnectionDAO.java Source code

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Here is the source code for co.nubetech.crux.dao.ConnectionDAO.java

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/**
 * Copyright 2011 Nube Technologies
 *
 * 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 co.nubetech.crux.dao;

import java.util.List;

import org.apache.log4j.Logger;
import org.hibernate.JDBCException;
import org.hibernate.Session;
import org.hibernate.Transaction;

import co.nubetech.crux.model.Connection;
import co.nubetech.crux.util.CruxException;

import com.googlecode.s2hibernate.struts2.plugin.annotations.SessionTarget;
import com.googlecode.s2hibernate.struts2.plugin.annotations.TransactionTarget;

public class ConnectionDAO {

    final static Logger logger = Logger.getLogger(co.nubetech.crux.dao.ConnectionDAO.class);

    @SessionTarget
    public Session session;
    @TransactionTarget
    public Transaction transaction;

    public Connection findById(Long id) throws CruxException {
        Connection connection;
        try {
            logger.debug("Id to find connection is: " + id);
            connection = (Connection) session.get(Connection.class, id);
            connection.getId();
        } catch (NullPointerException e) {
            logger.debug(id + " not exists.");
            throw new CruxException("Selected connection does not exists in the database.", e);
        }
        return connection;
    }

    public long save(Connection connection) throws CruxException {
        try {
            transaction.begin();
            session.saveOrUpdate(connection);
            transaction.commit();
        } catch (JDBCException e) {
            transaction.rollback();
            throw new CruxException(e.getSQLException().getMessage(), e);
        }

        return connection.getId();
    }

    public List<Connection> findAll() {
        System.out.println("session is " + session);
        List<Connection> result = session.createQuery("from Connection order by id").list();
        return result;
    }

    public long delete(Connection connection) throws CruxException {
        long id = connection.getId();
        try {
            transaction.begin();
            session.delete(connection);
            transaction.commit();
        } catch (JDBCException e) {
            transaction.rollback();
            throw new CruxException("This connection is associated with mappings. Please delete them first.", e);
        }
        return id;
    }
}