[py-dev] py.log and multiple keywords

[holger krekel]

Hi Grig, 

On Fri, Jun 17, 2005 at 09:15 -0700, Grig Gheorghiu wrote:
> 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.

Yes, however with the current svn version you can simply do: 

     def test_multiple_keywords(self):
         log = py.log.Producer('console logfile db')

         logfile = open(tempdir.join('mylogfile.out'), 'a', 1)
         dbfile = open(tempdir.join('mydbfile.out'), 'a', 1) 

         def multilogger(msg): 
            if 'logfile' in msg.keywords: 
                print >>logfile, str(msg) 
            if 'db' in msg.keywords: 
                print >>dbfile, str(msg) 
                
         py.log.setconsumer('console', multilogger) 
         
         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']

So it seems that with the simple ability to associate functions
to keywords you can basically do a lot of stuff without knowing 
any big API or intricate details. 

cheers, 
    
    holger