Experimental Physics and
Industrial Control System

"Denison, PN \(Peter\)" <[email protected]> · Thu, 27 Sep 2007 18:13:12 +0100

> From: [email protected] 
> [mailto:[email protected]] On Behalf Of Tim Mooney
> Sent: 25 September 2007 05:56
> 
> I guess I should split some modules up, so there aren't so 
> many dependencies among them, but then we'd have a lot more 
> modules to contend with.  Maybe that wouldn't actually be 
> better.  Comments, advice, anyone?
> 
> -- 
> Tim Mooney ([email protected]) (630)252-5417

I think the lack of spurious dependencies outweighs the number of
modules, but then that's just a personal opinion. At Diamond, we have
many, many support modules (156 at last count), but the number of times
you need to do something to *all* modules is small. That said, the
majority of those are individual device support, rather than support
modules like calc or sscan, so they tend to have fewer individual
dependencies. It's the IOCs that end up with lots of dependencies, but
the dependencies are fairly isolated.

Of course, there is more work when a common dependency changes (like
asyn!) but I think that is outweighed by the general principle of "each
function (module) should do one thing and do it well".

-- 
Peter Denison, Senior Software Engineer, Diamond Light Source Ltd.
Tel: +44 1235 778511
(apologies in advance for the lines below. Some bits are a legal
requirement and I have no control over them)

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Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System