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# Copyright (C) 2001,2002 by the Free Software Foundation, Inc.
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.

"""A factory of Switchboards with caching."""

from Mailman.Queue.Switchboard import Switchboard

# a mapping from queue directory to Switchboard instance
_sbcache = {}

def get_switchboard(qdir):
    switchboard = _sbcache.setdefault(qdir, Switchboard(qdir))
    return switchboard