[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.
# pylint: disable=W0401,W0614
# copyright 2003-2010 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/>.
"""exceptions used in the core of the CubicWeb web application"""
import http.client as http_client
from cubicweb._exceptions import *
from cubicweb.utils import json_dumps
class DirectResponse(Exception):
"""Used to supply a twitted HTTP Response directly"""
def __init__(self, response):
self.response = response
class InvalidSession(CubicWebException):
"""raised when a session id is found but associated session is not found or
invalid"""
# Publish related exception
class PublishException(CubicWebException):
"""base class for publishing related exception"""
def __init__(self, *args, **kwargs):
self.status = kwargs.pop('status', http_client.OK)
super(PublishException, self).__init__(*args, **kwargs)
class LogOut(PublishException):
"""raised to ask for deauthentication of a logged in user"""
def __init__(self, url=None):
super(LogOut, self).__init__()
self.url = url
class Redirect(PublishException):
"""raised to redirect the http request"""
def __init__(self, location, status=http_client.SEE_OTHER):
super(Redirect, self).__init__(status=status)
self.location = location
class StatusResponse(PublishException):
def __init__(self, status, content=''):
super(StatusResponse, self).__init__(status=status)
self.content = content
def __repr__(self):
return '%s(%r, %r)' % (self.__class__.__name__, self.status, self.content)
# Publish related error
class RequestError(PublishException):
"""raised when a request can't be served because of a bad input"""
def __init__(self, *args, **kwargs):
kwargs.setdefault('status', http_client.BAD_REQUEST)
super(RequestError, self).__init__(*args, **kwargs)
class NothingToEdit(RequestError):
"""raised when an edit request doesn't specify any eid to edit"""
def __init__(self, *args, **kwargs):
kwargs.setdefault('status', http_client.BAD_REQUEST)
super(NothingToEdit, self).__init__(*args, **kwargs)
class ProcessFormError(RequestError):
"""raised when posted data can't be processed by the corresponding field
"""
def __init__(self, *args, **kwargs):
kwargs.setdefault('status', http_client.BAD_REQUEST)
super(ProcessFormError, self).__init__(*args, **kwargs)
class NotFound(RequestError):
"""raised when something was not found. In most case,
a 404 error should be returned"""
def __init__(self, *args, **kwargs):
kwargs.setdefault('status', http_client.NOT_FOUND)
super(NotFound, self).__init__(*args, **kwargs)
class RemoteCallFailed(RequestError):
"""raised when a json remote call fails
"""
def __init__(self, reason='', status=http_client.INTERNAL_SERVER_ERROR):
super(RemoteCallFailed, self).__init__(reason, status=status)
self.reason = reason
def dumps(self):
return json_dumps({'reason': self.reason})