On 1 October 2012 16:52, Itamar Turner-Trauring <ita...@futurefoundries.com>wrote:
> > > On Mon, Oct 1, 2012 at 5:38 AM, Paul Wiseman <poal...@gmail.com> wrote: > >> >> I made an api for the web requests- the call isn't so straightforward, >> all the information is sent in POST formatted a certain way and there's >> also a credentials part with a token and other bits with secrets used to >> auth the request. So for instance I call the list dir method in the api and >> get back a Response type object based on the web response. Is there still >> way I can defer the returning of that web call, or would I need to tear the >> api apart to use twisted deferred objects internally? or is this something >> Agent could deal with? >> > > Agent could certainly deal with this; alternatively, if you're using a > blocking API you could use deferToThread (make sure the function you call > that way doesn't touch any global state or call any Twisted APIs.) > > -- > Itamar Turner-Trauring, Future Foundries LLC > http://futurefoundries.com/ — Twisted consulting, training and support. > > > _______________________________________________ > Twisted-Python mailing list > Twisted-Python@twistedmatrix.com > http://twistedmatrix.com/cgi-bin/mailman/listinfo/twisted-python > > This is twisting my brain slightly. what if I have more than 1 blocking call to make in the list dir call? One area that is especially confusing for me is where I have those blocking webcalls in a recursive method. Because the api needs a folder's unique id to return a folder list, if for instance someone requests a file/folder 10 levels deep, the list dir will need to walk up the path until it finds a cached node that it has an id for, and then walk back down the path listing the folders using the api. I read about chained deferreds and I think that might be the way to go but I'm not sure how I'd chain them together as 1 webcall needs the id from its parent folder they all need to be executed in a chain, but return down the recursive method stack Are there any examples of how I could make a recursive function with deferreds?
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