On Fri, Apr 24, 2015 at 8:13 AM, George Neuner <gneun...@comcast.net> wrote: > On 4/24/2015 7:36 AM, Jay McCarthy wrote: >> >> My point is that ONLY the result of make-parameter and parameterize is >> saved from the thread. In Racket a "parameter" has nothing to do with >> a function "argument". I believe you are confused by the two when you >> say "There are 9 arguments...". If you follow that documentation link, >> you'll see that "parameter" is a very specific thing in Racket and >> very few programs use them at all. > > > I'm not using parameterize at all (at least not explicitly). I receive a > web request that has up to 9 arguments contained in its bindings.
Therefore, nothing from the creating thread will be saved with the continuation. Only the local bindings will be saved. Jay > > (define (search request) > (let* [ > (params (request-bindings request)) > (cookies (request-cookies request)) > > (pid (find-cookie "pid" cookies)) > (county (exists-binding? 'county params)) > (state (exists-binding? 'state params)) > (search-txt (exists-binding? 'query params)) > (search-and (exists-binding? 'all params)) > (search-or (exists-binding? 'any params)) > (search-not (exists-binding? 'none params)) > (page-size (exists-binding? 'page params)) > (sort (exists-binding? 'sort params)) > : > > > Using those arguments, I retrieve information from the database regarding > the client that issued the request and construct a complex database query. > When that query succeeds, I need to enter additional accounting data for > each result based on the client - but only for results that the client > actually sees (paging), not necessarily for every result. > > So I need to maintain a lot of state through a continuation: the open > database connection [to cache the query results in the database], the > current page that the client is looking at (for navigation), and ideally the > client information for accounting [though I could look that up again if > necessary]. > > George > > -- Jay McCarthy http://jeapostrophe.github.io "Wherefore, be not weary in well-doing, for ye are laying the foundation of a great work. And out of small things proceedeth that which is great." - D&C 64:33 -- You received this message because you are subscribed to the Google Groups "Racket Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to racket-users+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
