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40 lines
1.7 KiB
Python
40 lines
1.7 KiB
Python
# -*- coding: iso-8859-1 -*-
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# Copyright (C) 2012 Bastian Kleineidam
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License along
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# with this program; if not, write to the Free Software Foundation, Inc.,
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# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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"""
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Mixin class for URLs that pool connections.
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"""
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class PooledConnection (object):
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"""Support for connection pooling."""
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def get_pooled_connection(self, scheme, host, port, create_connection):
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"""Get a connection from the connection pool."""
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get_connection = self.aggregate.connections.get
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while True:
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connection = get_connection(scheme, host, port, create_connection)
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if hasattr(connection, 'acquire'):
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# It's a connection lock object.
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# This little trick avoids polling: wait for another
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# connection to be released by acquiring the lock.
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connection.acquire()
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# The lock is immediately released since the calling
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# connections.get() acquires it again.
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connection.release()
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else:
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self.url_connection = connection
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break
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