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import tuned.logs from tuned.utils.config_parser import ConfigParser, Error from tuned.exceptions import TunedException import tuned.consts as consts from tuned.utils.commands import commands __all__ = ["GlobalConfig"] log = tuned.logs.get() class GlobalConfig(): def __init__(self,config_file = consts.GLOBAL_CONFIG_FILE): self._cfg = {} self.load_config(file_name=config_file) self._cmd = commands() @staticmethod def get_global_config_spec(): """ Easy validation mimicking configobj Returns two dicts, first with default values (default None) global_default[consts.CFG_SOMETHING] = consts.CFG_DEF_SOMETHING or None second with configobj function for value type (default "get" for string, others eg getboolean, getint) global_function[consts.CFG_SOMETHING] = consts.CFG_FUNC_SOMETHING or get } """ options = [opt for opt in dir(consts) if opt.startswith("CFG_") and not opt.startswith("CFG_FUNC_") and not opt.startswith("CFG_DEF_")] global_default = dict((getattr(consts, opt), getattr(consts, "CFG_DEF_" + opt[4:], None)) for opt in options) global_function = dict((getattr(consts, opt), getattr(consts, "CFG_FUNC_" + opt[4:], "get")) for opt in options) return global_default, global_function def load_config(self, file_name = consts.GLOBAL_CONFIG_FILE): """ Loads global configuration file. """ log.debug("reading and parsing global configuration file '%s'" % file_name) try: config_parser = ConfigParser(delimiters=('='), inline_comment_prefixes=('#'), strict=False) config_parser.optionxform = str with open(file_name) as f: config_parser.read_string("[" + consts.MAGIC_HEADER_NAME + "]\n" + f.read(), file_name) self._cfg, _global_config_func = self.get_global_config_spec() for option in config_parser.options(consts.MAGIC_HEADER_NAME): if option in self._cfg: try: func = getattr(config_parser, _global_config_func[option]) self._cfg[option] = func(consts.MAGIC_HEADER_NAME, option) except Error: raise TunedException("Global TuneD configuration file '%s' is not valid." % file_name) else: log.info("Unknown option '%s' in global config file '%s'." % (option, file_name)) self._cfg[option] = config_parser.get(consts.MAGIC_HEADER_NAME, option, raw=True) except IOError as e: raise TunedException("Global TuneD configuration file '%s' not found." % file_name) except Error as e: raise TunedException("Error parsing global TuneD configuration file '%s'." % file_name) def get(self, key, default = None): return self._cfg.get(key, default) def get_bool(self, key, default = None): if self._cmd.get_bool(self.get(key, default)) == "1": return True return False def get_int(self, key, default = 0): i = self._cfg.get(key, default) if i: if isinstance(i, int): return i else: return int(i, 0) return default def set(self, key, value): self._cfg[key] = value def get_size(self, key, default = None): val = self.get(key) if val is None: return default ret = self._cmd.get_size(val) if ret is None: log.error("Error parsing value '%s', using '%s'." %(val, default)) return default else: return ret
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