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# Postgres Listener, writes out flatfiles when SQL NOTIFYs are triggered
# Copyright (C) 2008 Collabora Ltd.
#
# 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.
import os
import syslog
from pglistener import PgListener
class MailingList(PgListener):
def do_format(self, row):
return row + '\n'
def do_write(self, result, target):
if not os.path.exists(target):
os.mkdir(target)
lists = {}
for list, emailaddress in result:
if list not in lists:
lists[list] = []
lists[list].append((emailaddress))
for list, values in lists.iteritems():
PgListener.do_write(self, values,
os.path.join(target, list))
# Remove old files.
for name in os.listdir(target):
if name in ('.', '..'):
continue
if name not in lists:
path = os.path.join(target, name)
try:
os.unlink(path)
except OSError:
self.log(syslog.LOG_WARNING, "failed to unlink %s" % path)
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