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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
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#
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# Copyright (C) 2001-2010 Federico Di Gregorio <fog@debian.org>
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#
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# psycopg2 is free software: you can redistribute it and/or modify it
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# under the terms of the GNU Lesser General Public License as published
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# by the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# psycopg2 is distributed in the hope that it will be useful, but WITHOUT
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# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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# FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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# License for more details.
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## put in DSN your DSN string
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DSN = 'dbname=test'
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## don't modify anything below tis line (except for experimenting)
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import sys
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import psycopg2
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import select
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if len(sys.argv) > 1:
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DSN = sys.argv[1]
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print "Opening connection using dns:", DSN
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conn = psycopg2.connect(DSN)
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print "Encoding for this connection is", conn.encoding
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conn.set_isolation_level(0)
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curs = conn.cursor()
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curs.execute("listen test")
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print "Waiting for 'NOTIFY test'"
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while 1:
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if select.select([curs],[],[],5)==([],[],[]):
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print "Timeout"
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else:
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if not curs.poll():
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print "Got NOTIFY: %s" % str(curs.connection.notifies.pop())
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