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table channels : { Client : client, Channel : channel (string * int * float) }
PRIMARY KEY Client
fun writeBack v =
me <- self;
r <- oneRow (SELECT channels.Channel FROM channels WHERE channels.Client = {[me]});
send r.Channels.Channel v
fun action () =
me <- self;
ch <- channel;
dml (INSERT INTO channels (Client, Channel) VALUES ({[me]}, {[ch]}));
buf <- Buffer.create;
let
fun receiver () =
v <- recv ch;
Buffer.write buf ("(" ^ v.1 ^ ", " ^ show v.2 ^ ", " ^ show v.3 ^ ")");
receiver ()
fun sender s n f =
sleep 2000;
writeBack (s, n, f);
sender (s ^ "!") (n + 1) (f + 1.23)
in
return <xml><body onload={spawn (receiver ()); sender "" 0 0.0}>
<dyn signal={Buffer.render buf}/>
</body></xml>
end
fun main () = return <xml><body>
<form><submit value="Begin demo" action={action}/></form>
</body></xml>
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