+
−# copyright 2010-2012 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
+
−# contact http://www.logilab.fr/ -- mailto:contact@logilab.fr
+
−#
+
−# This file is part of CubicWeb.
+
−#
+
−# CubicWeb is free software: you can redistribute it and/or modify it under the
+
−# terms of the GNU Lesser General Public License as published by the Free
+
−# Software Foundation, either version 2.1 of the License, or (at your option)
+
−# any later version.
+
−#
+
−# CubicWeb is distributed in the hope that it will be useful, but WITHOUT
+
−# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+
−# FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License for more
+
−# details.
+
−#
+
−# You should have received a copy of the GNU Lesser General Public License along
+
−# with CubicWeb.  If not, see <http://www.gnu.org/licenses/>.
+
−"""hooks for repository sources synchronization"""
+
−
+
−_ = unicode
+
−
+
−from socket import gethostname
+
−
+
−from logilab.common.decorators import clear_cache
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−
+
−from cubicweb import validation_error
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−from cubicweb.predicates import is_instance
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−from cubicweb.server import SOURCE_TYPES, hook
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−
+
−class SourceHook(hook.Hook):
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−    __abstract__ = True
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−    category = 'cw.sources'
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−
+
−
+
−# repo sources synchronization #################################################
+
−
+
−class SourceAddedOp(hook.Operation):
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−    entity = None # make pylint happy
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−    def postcommit_event(self):
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−        self.cnx.repo.add_source(self.entity)
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−
+
−class SourceAddedHook(SourceHook):
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−    __regid__ = 'cw.sources.added'
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−    __select__ = SourceHook.__select__ & is_instance('CWSource')
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−    events = ('after_add_entity',)
+
−    def __call__(self):
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−        try:
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−            sourcecls = SOURCE_TYPES[self.entity.type]
+
−        except KeyError:
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−            msg = _('Unknown source type')
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−            raise validation_error(self.entity, {('type', 'subject'): msg})
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−        # ignore creation of the system source done during database
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−        # initialisation, as config for this source is in a file and handling
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−        # is done separatly (no need for the operation either)
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−        if self.entity.name != 'system':
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−            sourcecls.check_conf_dict(self.entity.eid, self.entity.host_config,
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−                                      fail_if_unknown=not self._cw.vreg.config.repairing)
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−            SourceAddedOp(self._cw, entity=self.entity)
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−
+
−
+
−class SourceRemovedOp(hook.Operation):
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−    uri = None # make pylint happy
+
−    def postcommit_event(self):
+
−        self.cnx.repo.remove_source(self.uri)
+
−
+
−class SourceRemovedHook(SourceHook):
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−    __regid__ = 'cw.sources.removed'
+
−    __select__ = SourceHook.__select__ & is_instance('CWSource')
+
−    events = ('before_delete_entity',)
+
−    def __call__(self):
+
−        if self.entity.name == 'system':
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−            msg = _("You cannot remove the system source")
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−            raise validation_error(self.entity, {None: msg})
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−        SourceRemovedOp(self._cw, uri=self.entity.name)
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−
+
−
+
−class SourceConfigUpdatedOp(hook.DataOperationMixIn, hook.Operation):
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−
+
−    def precommit_event(self):
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−        self.__processed = []
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−        for source in self.get_data():
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−            if not self.cnx.deleted_in_transaction(source.eid):
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−                conf = source.repo_source.check_config(source)
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−                self.__processed.append( (source, conf) )
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−
+
−    def postcommit_event(self):
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−        for source, conf in self.__processed:
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−            source.repo_source.update_config(source, conf)
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−
+
−
+
−class SourceRenamedOp(hook.LateOperation):
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−    oldname = newname = None # make pylint happy
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−
+
−    def precommit_event(self):
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−        source = self.cnx.repo.sources_by_uri[self.oldname]
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−        sql = 'UPDATE entities SET asource=%(newname)s WHERE asource=%(oldname)s'
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−        self.cnx.system_sql(sql, {'oldname': self.oldname,
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−                                      'newname': self.newname})
+
−
+
−    def postcommit_event(self):
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−        repo = self.cnx.repo
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−        # XXX race condition
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−        source = repo.sources_by_uri.pop(self.oldname)
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−        source.uri = self.newname
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−        source.public_config['uri'] = self.newname
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−        repo.sources_by_uri[self.newname] = source
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−        repo._type_source_cache.clear()
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−        clear_cache(repo, 'source_defs')
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−
+
−
+
−class SourceUpdatedHook(SourceHook):
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−    __regid__ = 'cw.sources.configupdate'
+
−    __select__ = SourceHook.__select__ & is_instance('CWSource')
+
−    events = ('before_update_entity',)
+
−    def __call__(self):
+
−        if 'name' in self.entity.cw_edited:
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−            oldname, newname = self.entity.cw_edited.oldnewvalue('name')
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−            if oldname == 'system':
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−                msg = _("You cannot rename the system source")
+
−                raise validation_error(self.entity, {('name', 'subject'): msg})
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−            SourceRenamedOp(self._cw, oldname=oldname, newname=newname)
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−        if 'config' in self.entity.cw_edited:
+
−            if self.entity.name == 'system' and self.entity.config:
+
−                msg = _("Configuration of the system source goes to "
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−                        "the 'sources' file, not in the database")
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−                raise validation_error(self.entity, {('config', 'subject'): msg})
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−            SourceConfigUpdatedOp.get_instance(self._cw).add_data(self.entity)
+
−
+
−
+
−class SourceHostConfigUpdatedHook(SourceHook):
+
−    __regid__ = 'cw.sources.hostconfigupdate'
+
−    __select__ = SourceHook.__select__ & is_instance('CWSourceHostConfig')
+
−    events = ('after_add_entity', 'after_update_entity', 'before_delete_entity',)
+
−    def __call__(self):
+
−        if self.entity.match(gethostname()):
+
−            if self.event == 'after_update_entity' and \
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−                   not 'config' in self.entity.cw_edited:
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−                return
+
−            try:
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−                SourceConfigUpdatedOp.get_instance(self._cw).add_data(self.entity.cwsource)
+
−            except IndexError:
+
−                # XXX no source linked to the host config yet
+
−                pass
+
−
+
−
+
−# source mapping synchronization ###############################################
+
−#
+
−# Expect cw_for_source/cw_schema are immutable relations (i.e. can't change from
+
−# a source or schema to another).
+
−
+
−class SourceMappingImmutableHook(SourceHook):
+
−    """check cw_for_source and cw_schema are immutable relations
+
−
+
−    XXX empty delete perms would be enough?
+
−    """
+
−    __regid__ = 'cw.sources.mapping.immutable'
+
−    __select__ = SourceHook.__select__ & hook.match_rtype('cw_for_source', 'cw_schema')
+
−    events = ('before_add_relation',)
+
−    def __call__(self):
+
−        if not self._cw.added_in_transaction(self.eidfrom):
+
−            msg = _("You can't change this relation")
+
−            raise validation_error(self.eidfrom, {self.rtype: msg})
+
−
+
−
+
−class SourceMappingChangedOp(hook.DataOperationMixIn, hook.Operation):
+
−    def check_or_update(self, checkonly):
+
−        cnx = self.cnx
+
−        # take care, can't call get_data() twice
+
−        try:
+
−            data = self.__data
+
−        except AttributeError:
+
−            data = self.__data = self.get_data()
+
−        for schemacfg, source in data:
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−            if source is None:
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−                source = schemacfg.cwsource.repo_source
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−            if cnx.added_in_transaction(schemacfg.eid):
+
−                if not cnx.deleted_in_transaction(schemacfg.eid):
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−                    source.add_schema_config(schemacfg, checkonly=checkonly)
+
−            elif cnx.deleted_in_transaction(schemacfg.eid):
+
−                source.del_schema_config(schemacfg, checkonly=checkonly)
+
−            else:
+
−                source.update_schema_config(schemacfg, checkonly=checkonly)
+
−
+
−    def precommit_event(self):
+
−        self.check_or_update(True)
+
−
+
−    def postcommit_event(self):
+
−        self.check_or_update(False)
+
−
+
−
+
−class SourceMappingChangedHook(SourceHook):
+
−    __regid__ = 'cw.sources.schemaconfig'
+
−    __select__ = SourceHook.__select__ & is_instance('CWSourceSchemaConfig')
+
−    events = ('after_add_entity', 'after_update_entity')
+
−    def __call__(self):
+
−        if self.event == 'after_add_entity' or (
+
−            self.event == 'after_update_entity' and 'options' in self.entity.cw_edited):
+
−            SourceMappingChangedOp.get_instance(self._cw).add_data(
+
−                (self.entity, None) )
+
−
+
−class SourceMappingDeleteHook(SourceHook):
+
−    __regid__ = 'cw.sources.delschemaconfig'
+
−    __select__ = SourceHook.__select__ & hook.match_rtype('cw_for_source')
+
−    events = ('before_delete_relation',)
+
−    def __call__(self):
+
−        SourceMappingChangedOp.get_instance(self._cw).add_data(
+
−            (self._cw.entity_from_eid(self.eidfrom),
+
−             self._cw.entity_from_eid(self.eidto).repo_source) )