psycopg2/examples/notify.py

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2005-10-18 18:07:17 +04:00
# notify.py - example of getting notifies
#
# Copyright (C) 2001-2005 Federico Di Gregorio <fog@debian.org>
#
# 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, 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 MERCHANTIBILITY
# or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
# for more details.
## put in DSN your DSN string
DSN = 'dbname=test'
## don't modify anything below tis line (except for experimenting)
import sys
import psycopg2
import select
if len(sys.argv) > 1:
DSN = sys.argv[1]
print "Opening connection using dns:", DSN
conn = psycopg2.connect(DSN)
print "Encoding for this connection is", conn.encoding
conn.set_isolation_level(0)
curs = conn.cursor()
curs.execute("listen test")
print "Waiting for 'NOTIFY test'"
while 1:
if select.select([curs],[],[],5)==([],[],[]):
print "Timeout"
else:
if curs.isready():
print "Got NOTIFY: %s" % str(curs.connection.notifies.pop())