+
−# copyright 2003-2012 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
+
−# contact http://www.logilab.fr/ -- mailto:contact@logilab.fr
+
−#
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−# 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
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−# 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/>.
+
−"""Source to query another RQL repository using pyro"""
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−
+
−__docformat__ = "restructuredtext en"
+
−_ = unicode
+
−
+
−import threading
+
−from Pyro.errors import PyroError, ConnectionClosedError
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−
+
−from cubicweb import ConnectionError
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−from cubicweb.server.sources import ConnectionWrapper
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−
+
−from cubicweb.server.sources.remoterql import RemoteSource
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−
+
−class PyroRQLSource(RemoteSource):
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−    """External repository source, using Pyro connection"""
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−
+
−    def get_connection(self):
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−        try:
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−            return self._get_connection()
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−        except (ConnectionError, PyroError) as ex:
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−            self.critical("can't get connection to source %s: %s", self.uri, ex)
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−            return ConnectionWrapper()
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−
+
−    def check_connection(self, cnx):
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−        """check connection validity, return None if the connection is still valid
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−        else a new connection
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−        """
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−        # we have to transfer manually thread ownership. This can be done safely
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−        # since the connections set holding the connection is affected to one
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−        # session/thread and can't be called simultaneously
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−        try:
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−            cnx._repo._transferThread(threading.currentThread())
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−        except AttributeError:
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−            # inmemory connection
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−            pass
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−        try:
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−            return super(PyroRQLSource, self).check_connection(cnx)
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−        except ConnectionClosedError:
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−            # try to reconnect
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−            return self.get_connection()
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−