com.headstrong.teevra.services.refdata.dao.impl.DataSourceConfigDAOImpl.java Source code

Introduction

Here is the source code for com.headstrong.teevra.services.refdata.dao.impl.DataSourceConfigDAOImpl.java

Source

/*
 * The information in this document is subject to change without notice and 
 * does not represent a commitment by Headstrong Corporation. The software 
 * and/or databases described in this document are furnished under a license 
 * agreement and may be used or copied only in accordance with the terms of 
 * the agreement. 
 * 
 * Copyright  2008 Headstrong Corporation
 * All rights reserved.
 * 
 * $Id: DatasourceConfigDAOImpl.java
 * $Revision: 
 * $Author: ViswanathP
 * $DateTime: Dec 24, 2008 
 */

package com.headstrong.teevra.services.refdata.dao.impl;

import java.util.List;

import org.hibernate.criterion.DetachedCriteria;
import org.hibernate.criterion.Restrictions;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.headstrong.teevra.common.dao.hibernate.BaseHibernateDAO;
import com.headstrong.teevra.services.refdata.dao.DataSourceConfigDAO;
import com.headstrong.teevra.services.refdata.eo.DataSourceConfigEO;
import com.headstrong.teevra.services.refdata.exception.DataSourceConfigDeleteException;
import com.headstrong.teevra.services.refdata.exception.RefDataServiceException;
import com.headstrong.teevra.services.refdata.exception.UniqueDataSourceConfigException;

/**
 * DataSourceConfigDAOImpl implements DataSourceConfigDAO and contains methods
 * to perform CRUD operations on data source configurations.
 */
public class DataSourceConfigDAOImpl extends BaseHibernateDAO<DataSourceConfigEO> implements DataSourceConfigDAO {

    /**
     * Logger for DataSourceConfigDAOImpl
     */
    private static Logger logger = LoggerFactory.getLogger(DataSourceConfigDAOImpl.class);

    /*
     * (non-Javadoc)
     * 
     * @see com.headstrong.teevra.services.refdata.dao.DataSourceConfigDAO#getDataSourceConfigs()
     */
    public List<DataSourceConfigEO> getDataSourceConfigs() throws RefDataServiceException {
        String query = "from DataSourceConfigEO dataSourceConfig";
        return super.getByQuery(query);
    }

    /*
     * (non-Javadoc)
     * 
     * @see com.headstrong.teevra.services.refdata.dao.DataSourceConfigDAO#saveDataSouceConfig(com.headstrong.teevra.services.refdata.eo.DataSourceConfigEO)
     */
    public void saveDataSourceConfig(DataSourceConfigEO dataSourceConfigToSave) throws RefDataServiceException {

        DetachedCriteria criteria = DetachedCriteria.forClass(DataSourceConfigEO.class);
        criteria.add(Restrictions.eq("dataSourceName", dataSourceConfigToSave.getDataSourceName()));
        if (dataSourceConfigToSave.getDataSourceId() != null) {
            criteria.add(Restrictions.ne("dataSourceId", dataSourceConfigToSave.getDataSourceId()));
        }
        List<DataSourceConfigEO> configList = super.getByCriteria(criteria);

        if (!configList.isEmpty()) {
            logger.error("A process with the same name already exists in the system");
            throw new UniqueDataSourceConfigException("A data source with the name " + "'"
                    + dataSourceConfigToSave.getDataSourceName() + "'" + " is already exists in the system");
        } else {
            super.saveOrUpdate(dataSourceConfigToSave);

        }

    }

    /*
     * (non-Javadoc)
     * 
     * @see com.headstrong.teevra.services.refdata.dao.DataSourceConfigDAO#deleteDataSouceConfig(java.lang.String)
     */
    public void deleteDataSourceConfig(String dataSourceName) throws RefDataServiceException {
        // get the list of datasources for the given dataSourceName(list should
        // contain only one element)
        List<DataSourceConfigEO> dataSourceConfigList = super.getByCriteria(DetachedCriteria
                .forClass(DataSourceConfigEO.class).add(Restrictions.eq("dataSourceName", dataSourceName)));

        // delete the config if the list is not empty else throw an exception
        if (!dataSourceConfigList.isEmpty()) {
            super.delete(dataSourceConfigList.get(0));
        } else {

            logger.error("Couldn't delete.. there is no such data source configuration");
            throw new DataSourceConfigDeleteException("Cannot delete the data source configuration with name: "
                    + "'" + dataSourceName + "'" + ". there is no such data source configuration");

        }

    }
}