comment tiramisu/setting.py
This commit is contained in:
Emmanuel Garette
parent
77c1ccf40b
commit
371f094dcb
1 changed files with 142 additions and 47 deletions
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@ -28,19 +28,88 @@ from tiramisu.error import (RequirementError, PropertiesOptionError,
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from tiramisu.i18n import _
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"Default encoding for display a Config if raise UnicodeEncodeError"
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default_encoding = 'utf-8'
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"""If cache and expire is enable, time before cache is expired.
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This delay start first time value/setting is set in cache, even if
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user access several time to value/setting
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"""
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expires_time = 5
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ro_remove = set(['permissive', 'hidden'])
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ro_append = set(['frozen', 'disabled', 'validator', 'everything_frozen',
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'mandatory'])
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rw_remove = set(['permissive', 'everything_frozen', 'mandatory'])
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rw_append = set(['frozen', 'disabled', 'validator', 'hidden'])
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"""List of default properties (you can add new one if needed).
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For common properties and personalise properties, if a propery is set for
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an Option and for the Config together, Setting raise a PropertiesOptionError
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* Common properties:
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hidden
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option with this property can only get value in read only mode. This
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option is not available in read write mode.
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disabled
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option with this property cannot be set/get
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frozen
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cannot set value for option with this properties if 'frozen' is set in
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config
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mandatory
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should set value for option with this properties if 'mandatory' is set in
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config
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* Special property:
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permissive
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option with 'permissive' cannot raise PropertiesOptionError for properties
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set in permissive
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config with 'permissive', whole option in this config cannot raise
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PropertiesOptionError for properties set in permissive
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* Special Config properties:
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cache
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if set, enable cache settings and values
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expire
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if set, settings and values in cache expire after ``expires_time``
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everything_frozen
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whole option in config are frozen (even if option have not frozen
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property)
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validator
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launch validator set by user in option (this property has no effect
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for internal validator)
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"""
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default_properties = ('cache', 'expire', 'validator')
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"""Config can be in two defaut mode:
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read_only
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you can get all variables not disabled but you cannot set any variables
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if a value has a callback without any value, callback is launch and value
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of this variable can change
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you cannot access to mandatory variable without values
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read_write
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you can get all variables not disabled and not hidden
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you can set all variables not frozen
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"""
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ro_append = set(['frozen', 'disabled', 'validator', 'everything_frozen',
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'mandatory'])
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ro_remove = set(['permissive', 'hidden'])
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rw_append = set(['frozen', 'disabled', 'validator', 'hidden'])
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rw_remove = set(['permissive', 'everything_frozen', 'mandatory'])
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# ____________________________________________________________
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class _NameSpace:
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"""convenient class that emulates a module
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and builds constants (that is, unique names)"""
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and builds constants (that is, unique names)
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when attribute is added, we cannot delete it
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"""
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def __setattr__(self, name, value):
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if name in self.__dict__:
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@ -53,7 +122,6 @@ class _NameSpace:
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raise ValueError(name)
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# ____________________________________________________________
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class GroupModule(_NameSpace):
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"emulates a module to manage unique group (OptionDescription) names"
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class GroupType(str):
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@ -71,21 +139,8 @@ class GroupModule(_NameSpace):
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*master* means : groups that have the 'master' attribute set
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"""
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pass
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# setting.groups (emulates a module)
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groups = GroupModule()
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def populate_groups():
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"populates the available groups in the appropriate namespaces"
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groups.master = groups.MasterGroupType('master')
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groups.default = groups.DefaultGroupType('default')
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groups.family = groups.GroupType('family')
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# names are in the module now
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populate_groups()
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# ____________________________________________________________
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class OwnerModule(_NameSpace):
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"""emulates a module to manage unique owner names.
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@ -99,28 +154,6 @@ class OwnerModule(_NameSpace):
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class DefaultOwner(Owner):
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"""groups that are default (typically 'default')"""
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pass
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# setting.owners (emulates a module)
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owners = OwnerModule()
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def populate_owners():
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"""populates the available owners in the appropriate namespaces
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- 'user' is the generic is the generic owner.
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- 'default' is the config owner after init time
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"""
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setattr(owners, 'default', owners.DefaultOwner('default'))
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setattr(owners, 'user', owners.Owner('user'))
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def addowner(name):
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"""
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:param name: the name of the new owner
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"""
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setattr(owners, name, owners.Owner(name))
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setattr(owners, 'addowner', addowner)
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# names are in the module now
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populate_owners()
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class MultiTypeModule(_NameSpace):
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@ -137,18 +170,79 @@ class MultiTypeModule(_NameSpace):
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class SlaveMultiType(MultiType):
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pass
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multitypes = MultiTypeModule()
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# ____________________________________________________________
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def populate_groups():
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"""populates the available groups in the appropriate namespaces
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groups.default
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default group set when creating a new optiondescription
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groups.master
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master group is a special optiondescription, all suboptions should be
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multi option and all values should have same length, to find master's
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option, the optiondescription's name should be same than de master's
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option
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groups.family
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example of group, no special behavior with this group's type
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"""
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groups.default = groups.DefaultGroupType('default')
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groups.master = groups.MasterGroupType('master')
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groups.family = groups.GroupType('family')
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def populate_owners():
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"""populates the available owners in the appropriate namespaces
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default
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is the config owner after init time
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user
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is the generic is the generic owner
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"""
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setattr(owners, 'default', owners.DefaultOwner('default'))
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setattr(owners, 'user', owners.Owner('user'))
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def addowner(name):
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"""
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:param name: the name of the new owner
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"""
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setattr(owners, name, owners.Owner(name))
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setattr(owners, 'addowner', addowner)
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def populate_multitypes():
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"populates the master/slave namespace"
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"""all multi option should have a type, this type is automaticly set do
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not touch this
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default
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default's multi option set if not master or slave
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master
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master's option in a group with master's type, name of this option
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should be the same name of the optiondescription
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slave
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slave's option in a group with master's type
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"""
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setattr(multitypes, 'default', multitypes.DefaultMultiType('default'))
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setattr(multitypes, 'master', multitypes.MasterMultiType('master'))
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setattr(multitypes, 'slave', multitypes.SlaveMultiType('slave'))
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# ____________________________________________________________
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# populate groups, owners and multitypes with default attributes
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groups = GroupModule()
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populate_groups()
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owners = OwnerModule()
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populate_owners()
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multitypes = MultiTypeModule()
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populate_multitypes()
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# ____________________________________________________________
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class Property(object):
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"a property is responsible of the option's value access rules"
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__slots__ = ('_setting', '_properties', '_opt', '_path')
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@ -171,7 +265,8 @@ class Property(object):
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def remove(self, propname):
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if propname in self._properties:
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self._properties.remove(propname)
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self._setting._setproperties(self._properties, self._opt, self._path)
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self._setting._setproperties(self._properties, self._opt,
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self._path)
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def reset(self):
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self._setting.reset(_path=self._path)
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@ -381,11 +476,11 @@ class Settings(object):
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self.append(prop)
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def read_only(self):
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"convenience method to freeze, hidde and disable"
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"convenience method to freeze, hide and disable"
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self._read(ro_remove, ro_append)
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def read_write(self):
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"convenience method to freeze, hidde and disable"
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"convenience method to freeze, hide and disable"
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self._read(rw_remove, rw_append)
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def reset_cache(self, only_expired):
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