entities/sources.py
author Sylvain Thénault <sylvain.thenault@logilab.fr>
Mon, 19 Sep 2011 14:22:28 +0200
changeset 7808 d90338624ea0
parent 6957 ffda12be2e9f
child 7827 9bbf83f68bcc
permissions -rw-r--r--
[security view] slight changes to make things clearer
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# copyright 2003-2011 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
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# contact http://www.logilab.fr/ -- mailto:contact@logilab.fr
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#
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# This file is part of CubicWeb.
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#
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# CubicWeb is free software: you can redistribute it and/or modify it under the
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# terms of the GNU Lesser General Public License as published by the Free
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# Software Foundation, either version 2.1 of the License, or (at your option)
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# any later version.
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#
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# CubicWeb 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 along
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# with CubicWeb.  If not, see <http://www.gnu.org/licenses/>.
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"""data source related entities"""
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__docformat__ = "restructuredtext en"
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import re
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from socket import gethostname
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from logilab.common.textutils import text_to_dict
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from logilab.common.configuration import OptionError
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from cubicweb import ValidationError
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from cubicweb.entities import AnyEntity, fetch_config
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class _CWSourceCfgMixIn(object):
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    @property
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    def dictconfig(self):
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        return self.config and text_to_dict(self.config) or {}
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    def update_config(self, skip_unknown=False, **config):
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        from cubicweb.server import SOURCE_TYPES
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        from cubicweb.server.serverconfig import (SourceConfiguration,
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                                                  generate_source_config)
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        cfg = self.dictconfig
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        cfg.update(config)
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        options = SOURCE_TYPES[self.type].options
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        sconfig = SourceConfiguration(self._cw.vreg.config, options=options)
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        for opt, val in cfg.iteritems():
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            try:
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                sconfig.set_option(opt, val)
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            except OptionError:
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                if skip_unknown:
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                    continue
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                raise
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        cfgstr = unicode(generate_source_config(sconfig), self._cw.encoding)
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        self.set_attributes(config=cfgstr)
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class CWSource(_CWSourceCfgMixIn, AnyEntity):
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    __regid__ = 'CWSource'
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    fetch_attrs, fetch_order = fetch_config(['name', 'type'])
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    @property
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    def host_config(self):
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        dictconfig = self.dictconfig
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        host = gethostname()
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        for hostcfg in self.host_configs:
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            if hostcfg.match(host):
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                self.info('matching host config %s for source %s',
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                          hostcfg.match_host, self.name)
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                dictconfig.update(hostcfg.dictconfig)
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        return dictconfig
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    @property
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    def host_configs(self):
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        return self.reverse_cw_host_config_of
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    def init_mapping(self, mapping):
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        for key, options in mapping:
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            if isinstance(key, tuple): # relation definition
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                assert len(key) == 3
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                restrictions = ['X relation_type RT, RT name %(rt)s']
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                kwargs = {'rt': key[1]}
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                if key[0] != '*':
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                    restrictions.append('X from_entity FT, FT name %(ft)s')
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                    kwargs['ft'] = key[0]
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                if key[2] != '*':
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                    restrictions.append('X to_entity TT, TT name %(tt)s')
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                    kwargs['tt'] = key[2]
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                rql = 'Any X WHERE %s' % ','.join(restrictions)
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                schemarset = self._cw.execute(rql, kwargs)
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            elif key[0].isupper(): # entity type
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                schemarset = self._cw.execute('CWEType X WHERE X name %(et)s',
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                                              {'et': key})
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            else: # relation type
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                schemarset = self._cw.execute('CWRType X WHERE X name %(rt)s',
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                                              {'rt': key})
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            for schemaentity in schemarset.entities():
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                self._cw.create_entity('CWSourceSchemaConfig',
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                                       cw_for_source=self,
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                                       cw_schema=schemaentity,
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                                       options=options)
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    @property
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    def repo_source(self):
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        """repository only property, not available from the web side (eg
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        self._cw is expected to be a server session)
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        """
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        return self._cw.repo.sources_by_eid[self.eid]
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class CWSourceHostConfig(_CWSourceCfgMixIn, AnyEntity):
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    __regid__ = 'CWSourceHostConfig'
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    fetch_attrs, fetch_order = fetch_config(['match_host', 'config'])
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    @property
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    def cwsource(self):
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        return self.cw_host_config_of[0]
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    def match(self, hostname):
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        return re.match(self.match_host, hostname)
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class CWSourceSchemaConfig(AnyEntity):
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    __regid__ = 'CWSourceSchemaConfig'
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    fetch_attrs, fetch_order = fetch_config(['cw_for_source', 'cw_schema', 'options'])
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    def dc_title(self):
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        return self._cw._(self.__regid__) + ' #%s' % self.eid
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    @property
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    def schema(self):
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        return self.cw_schema[0]
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    @property
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    def cwsource(self):
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        return self.cw_for_source[0]