StandardInterfaces V0.1

[Guy Rixon]

On Thu, 22 Jan 2004, Tony Linde wrote:

> > I know that you're not much in favour of registries polling
> > services but there may be edge cases where it's desirable.
> > E.g. a private registry monitoring a few, selected services.
>
> It wasn't that. More that if you're going to call the service anyway, why
> not just do a 'since' harvest - if you get data returned you know things
> have changed, if nothing returned then nothing's changed. Don't really need
> a separate method do you?

For harvesting changes, no.  For finding out when a change happened, given
that regular harvesting has gone wrong for some reason, yes.  When debugging,
I'd want to find out when the service switched to new metadata and doing this
by asking for changes after some cut-off date is clunky.