189 lines
7.5 KiB
Python
189 lines
7.5 KiB
Python
# -*- coding: utf-8 -*-
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"master slave support"
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# Copyright (C) 2014-2018 Team tiramisu (see AUTHORS for all contributors)
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#
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# This program is free software: you can redistribute it and/or modify it
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# under the terms of the GNU Lesser General Public License as published by the
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# Free Software Foundation, either version 3 of the License, or (at your
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# option) any later version.
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#
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# This program is distributed in the hope that it will be useful, but WITHOUT
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# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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# FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
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# details.
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#
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# You should have received a copy of the GNU Lesser General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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#
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# The original `Config` design model is unproudly borrowed from
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# the rough pypy's guys: http://codespeak.net/svn/pypy/dist/pypy/config/
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# the whole pypy projet is under MIT licence
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# ____________________________________________________________
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import weakref
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from itertools import chain
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from ..i18n import _
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from ..setting import groups, undefined
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from .optiondescription import OptionDescription
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from .option import Option
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from ..error import SlaveError, PropertiesOptionError
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from ..function import ParamOption
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class MasterSlaves(OptionDescription):
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__slots__ = ('master', 'slaves')
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def __init__(self,
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name,
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doc,
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children,
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requires=None,
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properties=None):
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super(MasterSlaves, self).__init__(name,
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doc,
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children,
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requires=requires,
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properties=properties)
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self._group_type = groups.master
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slaves = []
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if len(children) < 2:
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raise ValueError(_('a master and a slave are mandatories in masterslaves "{}"').format(name))
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master = children[0]
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for idx, child in enumerate(children):
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if child.impl_is_symlinkoption(): # pragma: optional cover
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raise ValueError(_('masterslaves "{0}" shall not have '
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"a symlinkoption").format(self.impl_get_display_name()))
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if not isinstance(child, Option): # pragma: optional cover
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raise ValueError(_('masterslaves "{0}" shall not have '
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'a subgroup').format(self.impl_get_display_name()))
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if not child.impl_is_multi(): # pragma: optional cover
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raise ValueError(_('only multi option allowed in masterslaves "{0}" but option '
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'"{1}" is not a multi').format(self.impl_get_display_name(),
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child.impl_get_display_name()))
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if idx != 0 and child.impl_getdefault() != []:
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raise ValueError(_('not allowed default value for option "{0}" '
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'in masterslaves "{1}"'
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'').format(child.impl_get_display_name(),
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self.impl_get_display_name()))
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# no empty property for save
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if idx != 0:
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properties = list(child._properties)
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properties.remove('empty')
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child._properties = frozenset(properties)
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slaves.append(child)
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child._add_dependency(self)
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child._master_slaves = weakref.ref(self)
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callback, callback_params = master.impl_get_callback()
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if callback is not None and callback_params != None:
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for callbk in chain(callback_params.args, callback_params.kwargs.values()):
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if isinstance(callbk, ParamOption):
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if callbk.option in slaves:
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raise ValueError(_("callback of master's option shall "
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"not refered a slave's ones"))
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def is_master(self, opt):
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master = self._children[0][0]
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return opt.impl_getname() == master or (opt.impl_is_dynsymlinkoption() and
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opt._opt.impl_getname() == master)
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def getmaster(self):
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return self._children[1][0]
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def getslaves(self):
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for slave in self._children[1][1:]:
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yield slave
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def in_same_group(self, opt):
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if opt.impl_is_dynsymlinkoption():
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c_opt = opt._opt
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else:
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c_opt = opt
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return c_opt in self._children[1]
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def reset(self,
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values,
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config_bag,
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_commit=True):
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for slave in self.getslaves():
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sconfig_bag = config_bag.copy('nooption')
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sconfig_bag.option = slave
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sconfig_bag.validate = False
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slave_path = slave.impl_getpath(values._getcontext())
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values.reset(slave_path,
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sconfig_bag,
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_commit=_commit)
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def pop(self,
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values,
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index,
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config_bag,
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slaves=undefined):
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context = values._getcontext()
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if slaves is undefined:
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slaves = self.getslaves()
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for slave in slaves:
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slave_path = slave.impl_getpath(context)
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slavelen = values._p_.get_max_length(slave_path)
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sconfig_bag = config_bag.copy('nooption')
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sconfig_bag.option = slave
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if not values.is_default_owner(slave_path,
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index,
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config_bag,
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validate_meta=False):
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if slavelen > index:
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values._p_.resetvalue_index(slave_path,
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index)
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if slavelen > index + 1:
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for idx in range(index + 1, slavelen):
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values._p_.reduce_index(slave_path,
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idx)
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def reset_cache(self,
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path,
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values,
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settings,
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resetted_opts):
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master = self.getmaster()
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slaves = self.getslaves()
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self._reset_cache(master,
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slaves,
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values,
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settings,
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resetted_opts)
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def _reset_cache(self,
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master,
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slaves,
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values,
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settings,
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resetted_opts):
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context = values._getcontext()
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mpath = master.impl_getpath(context)
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master.reset_cache(mpath,
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values,
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settings,
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None)
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for slave in slaves:
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spath = slave.impl_getpath(context)
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slave.reset_cache(spath,
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values,
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settings,
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None)
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resetted_opts.append(spath)
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def impl_validate_value(self,
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option,
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value,
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context):
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if option.impl_is_master_slaves('master') and isinstance(value, list):
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if len(value) < context._impl_length:
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raise SlaveError(_('cannot reduce length of the master "{}"'
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'').format(option.impl_get_display_name()))
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def impl_is_master_slaves(self, *args, **kwargs):
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return True
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