LocalDynamicMetadataProvider and caching settings

[Cantor, Scott]

> So if one uses the LocalDynamicMetadataProvider, and updates one of the
> files in the directory that you've defined for it, do the min and
> maxCacheDuration settings impact how quickly that change will "become
> noticed and the effective metadata for that entityID updated"?

Yes, far as I can tell. I already filed an issue to improve that, in particular because if you tune it very frequently, every "reload" is blind, it does a full parse and replace no matter whether anything changed, and inline to a request. So there's a clear tension between performance and refreshes, and that's not a necessary tradeoff when "stat" exists.

> I assume that as soon as one adds a new file to that directory, and then the
> IdP gets an AuthnRequest for that entityID, the new file will be noticed and
> be used "as soon as needed". Is that a correct assumption?

Yes, that part works fine.

-- Scott