author | Sylvain Thénault <sylvain.thenault@logilab.fr> |
Fri, 30 Jan 2015 15:43:28 +0100 | |
changeset 10190 | 252e8f7ff9ea |
parent 8670 | f02139297beb |
child 10235 | 684215aca046 |
permissions | -rw-r--r-- |
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[dbapi] add possibility to connect to a remote ZMQRepository (closes #2290126)
Vincent Michel <vincent.michel@logilab.fr>
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# copyright 2003-2012 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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"""Source to query another RQL repository using pyro""" |
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__docformat__ = "restructuredtext en" |
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_ = unicode |
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|
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from functools import partial |
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import zmq |
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8670
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prefix "tcp://" zmq uris with "zmqpickle" (closes #2574114)
Aurelien Campeas <aurelien.campeas@logilab.fr>
parents:
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from cubicweb.server.cwzmq import cwproto_to_zmqaddr |
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# XXX hack to overpass old zmq limitation that force to have |
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# only one context per python process |
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try: |
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from cubicweb.server.cwzmq import ctx |
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except ImportError: |
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ctx = zmq.Context() |
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class ZMQRepositoryClient(object): |
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""" |
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prefix "tcp://" zmq uris with "zmqpickle" (closes #2574114)
Aurelien Campeas <aurelien.campeas@logilab.fr>
parents:
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This class delegates the overall repository stuff to a remote source. |
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prefix "tcp://" zmq uris with "zmqpickle" (closes #2574114)
Aurelien Campeas <aurelien.campeas@logilab.fr>
parents:
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So calling a method of this repository will result on calling the |
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corresponding method of the remote source repository. |
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Any raised exception on the remote source is propagated locally. |
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ZMQ is used as the transport layer and cPickle is used to serialize data. |
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""" |
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fix no more running zmq repository test (closes #2500153)
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def __init__(self, zmq_address): |
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"""A zmq address provided here will be like |
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Aurelien Campeas <aurelien.campeas@logilab.fr>
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`zmqpickle-tcp://127.0.0.1:42000`. W |
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Aurelien Campeas <aurelien.campeas@logilab.fr>
parents:
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|
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prefix "tcp://" zmq uris with "zmqpickle" (closes #2574114)
Aurelien Campeas <aurelien.campeas@logilab.fr>
parents:
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We chop the prefix to get a real zmq address. |
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Aurelien Campeas <aurelien.campeas@logilab.fr>
parents:
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""" |
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self.socket = ctx.socket(zmq.REQ) |
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self.socket.connect(cwproto_to_zmqaddr(zmq_address)) |
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def __zmqcall__(self, name, *args, **kwargs): |
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self.socket.send_pyobj([name, args, kwargs]) |
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result = self.socket.recv_pyobj() |
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if isinstance(result, BaseException): |
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raise result |
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return result |
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def __getattr__(self, name): |
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return partial(self.__zmqcall__, name) |