[py-dev] py.log and multiple keywords

[Grig Gheorghiu]

Holger and others interested in this topic,

I was thinking that in many situations it would be helpful to be able
to specify multiple keywords that would each point to a different
consumer and that would be all 'kick in' on a call to the producer.
Basically, I'd want this test to pass:

    def test_multiple_keywords(self):
        log = py.log.Producer('console logfile db')
        py.log.setconsumer('console', py.log.STDOUT)
        logfile = tempdir.join('mylogfile.out')
        py.log.setconsumer('logfile', open(str(logfile), 'w',
buffering=1))
        dbfile = tempdir.join('mydbfile.out')
        py.log.setconsumer('db', open(str(dbfile), 'w', buffering=1))
        
        res, out, err = callcapture(log, "hello")
        assert out.strip() == "[console:logfile:db] hello" 

        assert logfile.readlines() == ['[console:logfile:db] hello\n']
        assert dbfile.readlines() == ['[console:logfile:db] hello\n']

Right now the last 2 assert statements fail, because _getconsumer
returns as soon as it finds a match for the first keyword, so only the
'console' consumer gets a chance to consume the message.

I'm thinking that the _getconsumer function could be a generator that
yields a message-processing function for each keyword it finds in its
registry. What do you think?

Grig