hooks/zmq.py
author Aurelien Campeas <aurelien.campeas@logilab.fr>
Wed, 03 Jul 2013 14:33:27 +0200
branchstable
changeset 9130 0f1504a9fb51
parent 8990 cb67b81545c2
child 9890 57e2cffa6329
permissions -rw-r--r--
[constraint] more robust unicity constraint failures reporting for end-users Postgres or Sqlserver have limits on the index names (around resp. 64 and 128 characters). Because `logilab.database` encodes the `unique together` constraint rtypes in the index names, we sometimes get truncated index names, from which it is impossible to retrieve all rtypes. In the long run, the way such index are named should be changed. In the short term, we try to reduce the end-user confusion resulting from this design flaw: * in source/native, the regex filtering ``IntegrityError`` message does not impose an `_idx` suffix, which indeed may be absent (the result being an UI message that resembles a catastrophic failure), * also we avoid including a trailing " (double quote) from the error message * in entities/adapters, the well-named ``IUserFriendly`` adapter is made a bit smarter about how to handle missing rtypes. * the adapter also always produces a global message explaining the issue (and the fact that sometimes, the user is not shown all the relevant info) * i18n is updated Closes #2793789

# -*- coding: utf-8 -*-
# copyright 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/>.

from cubicweb.server import hook

class ZMQStopHook(hook.Hook):
    __regid__ = 'zmqstop'
    events = ('server_shutdown',)

    def __call__(self):
        self.repo.app_instances_bus.stop()

class ZMQStartHook(hook.Hook):
    __regid__ = 'zmqstart'
    events = ('server_startup',)
    order = -1

    def __call__(self):
        config = self.repo.config
        address_pub = config.get('zmq-address-pub')
        address_sub = config.get('zmq-address-sub')
        if not address_pub and not address_sub:
            return
        from cubicweb.server import cwzmq
        self.repo.app_instances_bus = cwzmq.ZMQComm()
        if address_pub:
            self.repo.app_instances_bus.add_publisher(address_pub)
        def clear_cache_callback(msg):
            self.debug('clear_caches: %s', ' '.join(msg))
            self.repo.clear_caches(msg[1:])
        self.repo.app_instances_bus.add_subscription('delete', clear_cache_callback)
        for address in address_sub:
            self.repo.app_instances_bus.add_subscriber(address)
        self.repo.app_instances_bus.start()


class ZMQRepositoryServerStopHook(hook.Hook):
    __regid__ = 'zmqrepositoryserverstop'
    events = ('server_shutdown',)

    def __call__(self):
        server = getattr(self.repo, 'zmq_repo_server', None)
        if server:
            self.repo.zmq_repo_server.quit()

class ZMQRepositoryServerStartHook(hook.Hook):
    __regid__ = 'zmqrepositoryserverstart'
    events = ('server_startup',)

    def __call__(self):
        config = self.repo.config
        if config.name == 'repository':
            # start-repository command already starts a zmq repo
            return
        address = config.get('zmq-repository-address')
        if not address:
            return
        from cubicweb.server import cwzmq
        self.repo.zmq_repo_server = server = cwzmq.ZMQRepositoryServer(self.repo)
        server.connect(address)
        self.repo.threaded_task(server.run)