filesystem <-> pubsub server

Today someone asked offline if there was a sample piece of code
that will listen to a topic and publish to a file/directory
in a filesystem -- and, conversely, can poll a filesystem and
publish to a topic.

The answer is that the mod_pubsub Perl server works quite well
for this, out of the box.  Every routed event will show up as a
separate file in the Perl server's 'kn_events' directory on the
filesystem of the machine on which the Perl server is running.

With the KnowNow commercial server, you could create an off-host
route from a topic on the KnowNow server to a topic on the Perl
server to achieve this effect.

With the mod_pubsub Python server, we haven't yet implemented the
off-host route feature.  So if you want to have routes from the
Python pubsub server to the Perl pubsub server, off-host route
support is a feature that needs to be added.

fwiw,
   Adam


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