Viewing file:  global_config.py (3.15 KB) -rw-r--r--
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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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