[Twisted-Python] Must avatarId always be a string?

[Glyph]

On Jan 14, 2013, at 11:39 PM, Hynek Schlawack <hs at ox.cx> wrote:

> 
> Am 14.01.2013 um 23:58 schrieb Glyph <glyph at twistedmatrix.com>:
> 
>>>> It seems like the "shared caching reference" would solve this problem
>>>> as well?
>>> 
>>> Yes, I think that's the right answer. It's certainly the right design
>>> in my case, and perhaps in the general case too.
>> 
>> I think that this is the right design for now, given the constraints of the current cred API; however, it's certainly possible we could think up an extension to the cred API that would make this case easier to deal with.  It also leaves open some not-quite-trivial questions like "how do you know when to expire the cache, which are usually easy to work out for a particular application but do not generalize easily.
> 
> I was under the impression that the IRealm.requestAvatar() is *always* called *once* after ICredentialsChecker.requestAvatarId() so I simply delete the data from the cache once my avatar is created (and it works fine).
> 
> Am I presuming something I shouldn’t?

No, you're correct.  But, if you're using directory information for other purposes, perhaps you would want to expire it later.  Hence, hard to generalize.

-glyph

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