Ur/Web: demo/roundTrip.ur annotate

Initialize contexts a little more vigorously

author	Adam Chlipala <adamc@hcoop.net>
date	Sun, 05 Apr 2009 12:05:19 -0400
parents	9b29ce0babb8
children	1a317a707d71

rev	line source
adamc@698	1 table channels : { Client : client, Channel : channel (string * int * float) }
adamc@698	2
adamc@698	3 fun writeBack v =
adamc@698	4 me <- self;
adamc@698	5 r <- oneRow (SELECT channels.Channel FROM channels WHERE channels.Client = {[me]});
adamc@698	6 send r.Channels.Channel v
adamc@698	7
adamc@698	8 fun main () =
adamc@698	9 me <- self;
adamc@698	10 ch <- channel;
adamc@698	11 dml (INSERT INTO channels (Client, Channel) VALUES ({[me]}, {[ch]}));
adamc@698	12
adamc@698	13 buf <- Buffer.create;
adamc@698	14
adamc@698	15 let
adamc@698	16 fun receiver () =
adamc@698	17 v <- recv ch;
adamc@698	18 Buffer.write buf ("(" ^ v.1 ^ ", " ^ show v.2 ^ ", " ^ show v.3 ^ ")");
adamc@698	19 receiver ()
adamc@698	20
adamc@698	21 fun sender s n f =
adamc@698	22 sleep 2000;
adamc@698	23 writeBack (s, n, f);
adamc@698	24 sender (s ^ "!") (n + 1) (f + 1.23)
adamc@698	25 in
adamc@698	26 return <xml><body onload={spawn (receiver ()); sender "" 0 0.0}>
adamc@698	27 <dyn signal={Buffer.render buf}/>
adamc@698	28 </body></xml>
adamc@698	29 end

Mercurial > urweb