1 files changed, 27 insertions, 0 deletions

diff --git a/Mailman/queue/sbcache.py b/Mailman/queue/sbcache.py
new file mode 100644
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+++ b/Mailman/queue/sbcache.py
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+# Copyright (C) 2001-2007 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