def handle(self):
		run_root = self.__backend_mgr.get_run_root(self.__task.data['backend'], self.__task.data['id'])

		main_root = os.path.join(run_root, 'main')

		safe_rmdir(main_root)
		safe_mkdir(main_root)

		self.__create_input(main_root)
		self.__create_context(main_root)
		self.__create_action(main_root)
		self.__create_navigator(main_root)
		self.__create_bootstrap(main_root)

		launcher_param = self.__create_launcher(run_root)

		self.__submit(launcher_param)
def _db_schema_sanity_check(engine):
    """Ensure all database tables were created with required parameters.

    :param engine:  SQLAlchemy engine instance for a given database

    """

    if engine.name == 'mysql':
        onlyutf8_sql = ('SELECT TABLE_NAME,TABLE_COLLATION '
                        'from information_schema.TABLES '
                        'where TABLE_SCHEMA=%s and '
                        'TABLE_COLLATION NOT LIKE "%%utf8%%"')

        table_names = [res[0] for res in engine.execute(onlyutf8_sql,
                                                        engine.url.database)]
        if len(table_names) > 0:
            raise ValueError(_('Tables "%s" have non utf8 collation, '
                               'please make sure all tables are CHARSET=utf8'
                               ) % ','.join(table_names))