mirror of
https://github.com/psycopg/psycopg2.git
synced 2024-11-26 19:03:43 +03:00
c1a24f4ca2
POLL_OK has been changed from 3 to 0 to let the user specify a short loop just as "if not curs.poll()" instead of having to check for write and read separately. For an example of this, see examples/notify.py.
44 lines
1.2 KiB
Python
44 lines
1.2 KiB
Python
# notify.py - example of getting notifies
|
|
#
|
|
# Copyright (C) 2001-2010 Federico Di Gregorio <fog@debian.org>
|
|
#
|
|
# psycopg2 is free software: you can redistribute it and/or modify it
|
|
# under the terms of the GNU Lesser General Public License as published
|
|
# by the Free Software Foundation, either version 3 of the License, or
|
|
# (at your option) any later version.
|
|
#
|
|
# psycopg2 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 Lesser 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 not curs.poll():
|
|
print "Got NOTIFY: %s" % str(curs.connection.notifies.pop())
|