[server] Make connection pooler configurable and set better default values
Drop the configuration connections-pool-size and add new configurations options:
* connections-pool-min-size. Set to 0 by default so we open connections only
when needed. This avoid opening min-size*processes connections at startup,
which is, it think, a good default.
* connections-pool-max-size. Set to 0 (unlimited) by default, so we move the
bottleneck to postgresql.
* connections-idle-timeout. Set to 10 minutes. I don't have arguments about
this except that this is the default in pgbouncer.
# copyright 2010-2016 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"""
from cubicweb import _
from cubicweb import validation_error
from cubicweb.predicates import is_instance
from cubicweb.server import SOURCE_TYPES, hook
class SourceHook(hook.Hook):
__abstract__ = True
category = 'cw.sources'
def get_source(self, source_entity):
if source_entity.name == 'system':
return self._cw.repo.system_source
return self._cw.repo.get_source(source_entity.type, source_entity.name,
{}, source_entity.eid)
class SourceAddedHook(SourceHook):
__regid__ = 'cw.sources.added'
__select__ = SourceHook.__select__ & is_instance('CWSource')
events = ('after_add_entity',)
def __call__(self):
if self.entity.type not in SOURCE_TYPES:
msg = _('Unknown source type')
raise validation_error(self.entity, {('type', 'subject'): msg})
source = self.get_source(self.entity)
source.check_urls(self.entity)
source.check_config(self.entity)
class SourceRemovedHook(SourceHook):
__regid__ = 'cw.sources.removed'
__select__ = SourceHook.__select__ & is_instance('CWSource')
events = ('before_delete_entity',)
def __call__(self):
if self.entity.name == 'system':
msg = _("You cannot remove the system source")
raise validation_error(self.entity, {None: msg})
class SourceUpdatedHook(SourceHook):
__regid__ = 'cw.sources.configupdate'
__select__ = SourceHook.__select__ & is_instance('CWSource')
events = ('before_update_entity',)
def __call__(self):
if 'name' in self.entity.cw_edited:
oldname, newname = self.entity.cw_edited.oldnewvalue('name')
if oldname == 'system':
msg = _("You cannot rename the system source")
raise validation_error(self.entity, {('name', 'subject'): msg})
source = self.get_source(self.entity)
if 'url' in self.entity.cw_edited:
source.check_urls(self.entity)
if 'config' in self.entity.cw_edited:
source.check_config(self.entity)