[Seaside] Continuations - their future?

Philippe Marschall philippe.marschall at gmail.com
Mon Dec 10 12:14:47 UTC 2007

2007/12/10, Avi Bryant <avi at dabbledb.com>:
> On 12/9/07, Aaron Rosenzweig <aaron at cocoanutstech.com> wrote:
> > For me, I'm just getting my feet wet with Seaside and a big reason
> > for my interest in the framework is because it *does* support
> > continuations. In my heart of hearts, I'm hoping those words were
> > taken a bit out of context and things are different now but please
> > let me know.
> <snip>
> > I come from a WebObjects background where continuations reign
> > supreme, they're called "component actions" in WO lingo
> Aaron,
> Let me clear up a couple of points of confusion here.  First of all,
> I've never advocated removing continuations from Seaside, simply
> making them optional.  I believe that's already true as of 2.8.

No, that is unfortunately not yet the case for 2.8. The amount of
continuations used has simply been reduced. It is not yet possible to
run continuationless with CPS (#show:during:) which is a problem for
the VAST port.


> I
> have indeed said that I find them much less important now than they
> were pre-Ajax, but they have their uses and there's no reason to get
> rid of them.
> Second, WebObjects does not (and cannot) have continuations in the
> Seaside sense.  The "component actions" in WebObjects map most closely
> to what we call "callbacks", and those are absolutely foundational in
> Seaside - it makes little sense to think about the framework without
> them, Ajax or no.  Continuations only come into play when you use
> #call: and #answer: between components, which has no equivalent in WO.
> HTH,
> Avi
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