For one, a Request object is a singleton. By definition it can only be used
once. I assume they decided to make it a singleton because the life of a
Request is not clear cut. At any point in time you are not fully sure if it
is done doing it's job so that it can be used again. It was easier to make
it a singleton to reduce the amount of housekeeping code needed to manage
when it was done and could be used again. And I'm sure the fact that it is
asynchronous has a lot to due with it being a singleton.
Once you get over the fact that is can only be used once, and code
accordingly, you will find it's not that big of a deal.
Jim
On Wed, Jun 17, 2009 at 2:29 PM, aditya siram <[email protected]>wrote:
> Hi all,
> It seems as though 'Request' objects can only be used once. Code that tries
> to reuse [1] will only send the request once. Even though I 'setData' on
> each button press subsequent sends do nothing. Additionally the "completed"
> listener also only fires the first time.
>
> This is somewhat counter-intuitive and it took me a while to figure out
> that both the request and listener have to be freshly made [2] with each
> button press. Is this the intended usage?
>
> thanks ...
> deech
>
>
>
> [1]
> var req = new qx.io.remote.Request("/library", "POST");
> button.addListener("execute", function(e) {
> req.setData("isbn=" + isbn.getValue());
> this.debug(req.getData());
> req.send();
> });
>
> req.addListener("completed", function(e) {
> resp = qx.util.Json.parseQx(e.getContent());
> this.debug("done");
> this.debug(resp);
> });
>
> [2]
> button.addListener("execute", function(e) {
> var req = new qx.io.remote.Request("/library", "POST");
> req.setData("isbn=" + isbn.getValue());
> this.debug(req.getData());
> req.send();
>
> req.addListener("completed", function(e) {
> resp = qx.util.Json.parseQx(e.getContent());
> this.debug("done");
> this.debug(resp);
> });
> });
>
>
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