public function load(AbstractMetaModel $environment_metamodel, array $filters = NULL) {
        LogHelper::log_notice(t('Generating Environment Meta Model for Drupal database connections ...'));

        global $databases;

        $datasourceCount = 0;
        foreach ($databases as $namespace => $connections) {
            foreach ($connections as $datasourceNameOnly => $connection) {
                $datasource = new DataSourceMetaData();
                $datasource->name = NameSpaceHelper::addNameSpace($namespace, $datasourceNameOnly);
                $datasource->markAsPrivate();
                $datasource->readonly = FALSE;
                // setting required properties
                $this->setDataSourceProperty($datasource, $connection, 'type', 'driver');
                // setting other provided properties
                $this->setDataSourceExtensionProperties($datasource, $connection);

                // registering the data source
                $environment_metamodel->registerDataSource($datasource);
                $datasourceCount++;
            }
        }

        // Default database connection is shared because we store common utilities and dimensions there
        $defaultDataSource = $environment_metamodel->getDataSource(self::$DATASOURCE_NAME__DEFAULT);
        $defaultDataSource->shared = TRUE;

        LogHelper::log_info(t('Generated @datasourceCount data sources', array('@datasourceCount' => $datasourceCount)));
    }