[dancer-users] session() auto-flush

David Golden xdg at xdg.me
Fri Feb 14 19:26:17 GMT 2014

On Fri, Feb 14, 2014 at 1:41 PM, Warren Young <warren at etr-usa.com> wrote:
>     session()->{b} = 2;

I agree in principle with most everything you say, except for this
above.  You're violating encapsulation by modifying the internals of
the object.  As soon as you do that, you break the API contract and
so, yes, mayhem results.

The fact that the object doesn't give you a useful API for direct
modification is a flaw in the API, but going around it and expecting
it to just "magically work" isn't really right.

I would have no objection to having get/set methods added to
Dancer::Session::Abstract to allow you to modify keys.  At the moment,
modification would need to also trigger a flush.  Or, the API needs to
document that you need to flush as soon as you're done modifying.

I'd also be happy to see work done to defer flushing until after the
request is handled (as D2 does).  But someone has to do that work.

And that might have unintentional side effects, I'd say that the eager
flushing when setting variables might have been an intentional
compensation for the race condition inherent in session


David Golden <xdg at xdg.me>
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