add getDataSourceMap

     * @throws SQLException SQL exception

     */

    public Connection getConnection(final String dataSourceName) throws SQLException {

        return dataSourceMap.get(dataSourceName).getConnection();

        return getDataSourceMap().get(dataSourceName).getConnection();

    }

    /**

     * Get available data source map.

     *

     * @return available data source map

     */

    public Map<String, DataSource> getDataSourceMap() {

        if (!RuleRegistry.getInstance().getDisabledDataSourceNames().isEmpty()) {

            return getAvailableDataSourceMap();

        }

        return dataSourceMap;

    }

    private Map<String, DataSource> getAvailableDataSourceMap() {

        Map<String, DataSource> result = new LinkedHashMap<>(dataSourceMap);

        for (String each : RuleRegistry.getInstance().getDisabledDataSourceNames()) {

            result.remove(each);

        }

        return result;

    }

}