On Tue, Aug 19, 2014 at 4:00 PM, Aaron Bentley <aaron.bent...@canonical.com> wrote:
> -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > > On 14-08-19 09:42 AM, Gustavo Niemeyer wrote: > > I have never seen myself a single charm that completely ignores > > all the action cues to simply re-read the whole state from the > > ground up, > > The cs:~juju-qa/precise/juju-reports charm follows this general > pattern, but there are some specialized hooks: install, start, stop > and upgrade-charm. > ...and in case it's not clear: defined hooks would still continue to run at the appropriate times, so exceptions can be accommodated. But I think it becomes valuable as soon as there's any subset of hooks (most likely, indeed, the relation ones) where the charm's put in a position of rescanning the world one change at a time -- in which case all such situations can be handled in batches at a more measured cadence. config-changed, database-relation-broken, database-relation-changed, > database-relation-departed, and website-relation-changed are all the > same code and read the state afresh every time without reference to > the script name. > > The charmworld charm is similar. > And I'd be most interested to hear from anyone else who is also finding this mode of interaction with juju to be convenient... Cheers William
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