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* to "reset" a value, now you just have to delete it

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config.unwrap_from_path("string").reset(config) => del(config.string)
* add cache for value/setting to 5 secds
to "reset" cache just do: config.cfgimpl_clean_cache()
* can desactivate cache by removing "expire" property
This commit is contained in:
Emmanuel Garette
2013-04-18 20:26:40 +02:00
parent d5e1cb6576
commit 324c3d2cf6
7 changed files with 194 additions and 105 deletions
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84
tiramisu/setting.py
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@ -20,11 +20,14 @@
# the rough pypy's guys: http://codespeak.net/svn/pypy/dist/pypy/config/
# the whole pypy projet is under MIT licence
# ____________________________________________________________
from time import time
from tiramisu.error import RequirementRecursionError, PropertiesOptionError
from tiramisu.i18n import _
expires_time = 5
class _const:
"""convenient class that emulates a module
and builds constants (that is, unique names)"""
@ -139,17 +142,18 @@ populate_multitypes()
#____________________________________________________________
class Setting(object):
"``Config()``'s configuration options"
__slots__ = ('properties', 'permissives', 'owner', 'context')
__slots__ = ('properties', 'permissives', 'owner', 'context', '_cache')
def __init__(self, context):
# properties attribute: the name of a property enables this property
# key is None for global properties
self.properties = {None: []} # ['hidden', 'disabled', 'mandatory', 'frozen', 'validator']}
self.properties = {None: ['expire']}
# permissive properties
self.permissives = {}
# generic owner
self.owner = owners.user
self.context = context
self._cache = {}
#____________________________________________________________
# properties methods
@ -177,6 +181,7 @@ class Setting(object):
if propname not in props:
props.append(propname)
self.set_properties(props)
self.context.cfgimpl_clean_cache()
def disable_property(self, propname):
"deletes property propname in the Config's properties attribute"
@ -184,6 +189,7 @@ class Setting(object):
if propname in props:
props.remove(propname)
self.set_properties(props)
self.context.cfgimpl_clean_cache()
def set_properties(self, properties, opt=None):
"""save properties for specified opt
@ -203,44 +209,55 @@ class Setting(object):
if not propname in properties:
properties.append(propname)
self.set_properties(properties, opt)
self.context.cfgimpl_clean_cache()
def del_property(self, propname, opt, is_apply_req=True):
properties = self.get_properties(opt, is_apply_req)
if propname in properties:
properties.remove(propname)
self.set_properties(properties, opt)
self.context.cfgimpl_clean_cache()
#____________________________________________________________
def validate_properties(self, opt_or_descr, is_descr, is_write,
value=None, force_permissive=False,
force_properties=None):
properties = set(self.get_properties(opt_or_descr))
#remove this properties, those properties are validate in after
properties = properties - set(['mandatory', 'frozen'])
set_properties = self.get_properties()
if force_properties is not None:
set_properties.extend(force_properties)
set_properties = set(set_properties)
properties = properties & set_properties
if force_permissive is True or self.has_property('permissive', is_apply_req=False):
properties = properties - set(self.get_permissive())
properties = properties - set(self.get_permissive(opt_or_descr))
properties = list(properties)
raise_text = _("trying to access"
" to an option named: {0} with properties"
" {1}")
if not is_descr:
if self.context.cfgimpl_get_values().is_mandatory_err(opt_or_descr,
value,
force_properties=force_properties):
properties.append('mandatory')
if is_write and (self.has_property('everything_frozen') or (
self.has_property('frozen') and
self.has_property('frozen', opt_or_descr,
is_apply_req=False))):
properties.append('frozen')
raise_text = _('cannot change the value to {0} for '
'option {1} this option is frozen')
is_cached = False
if opt_or_descr in self._cache:
t = time()
props, raise_text, created = self._cache[opt_or_descr]
if t - created < expires_time:
properties = props
is_cached = True
if not is_cached:
properties = set(self.get_properties(opt_or_descr))
#remove this properties, those properties are validate in after
properties = properties - set(['mandatory', 'frozen'])
set_properties = self.get_properties()
if force_properties is not None:
set_properties.extend(force_properties)
set_properties = set(set_properties)
properties = properties & set_properties
if force_permissive is True or self.has_property('permissive', is_apply_req=False):
properties = properties - set(self.get_permissive())
properties = properties - set(self.get_permissive(opt_or_descr))
properties = list(properties)
raise_text = _("trying to access"
" to an option named: {0} with properties"
" {1}")
if not is_descr:
if self.context.cfgimpl_get_values().is_mandatory_err(opt_or_descr,
value,
force_properties=force_properties):
properties.append('mandatory')
if is_write and (self.has_property('everything_frozen') or (
self.has_property('frozen') and
self.has_property('frozen', opt_or_descr,
is_apply_req=False))):
properties.append('frozen')
raise_text = _('cannot change the value to {0} for '
'option {1} this option is frozen')
self._set_cache(opt_or_descr, properties, raise_text)
if properties != []:
raise PropertiesOptionError(raise_text.format(opt_or_descr._name,
str(properties)),
@ -285,6 +302,13 @@ class Setting(object):
self.enable_property('validator')
self.disable_property('permissive')
def _set_cache(self, opt, props, raise_text):
if self.has_property('expire'):
self._cache[opt] = (props, raise_text, time())
def reset_cache(self):
self._cache = {}
def apply_requires(opt, config):
"carries out the jit (just in time requirements between options"