[Twisted-web] Defers, the reactor, and idiomatic/proper usage
-- new user needs some advice?
dgray at omniti.com
Wed Jun 29 14:55:43 MDT 2005
> which stops the reactor. The trick here is that if you stuff that
> deferred into a DeferredList before you add the callback that stops the
> reactor then if your first operation itself returns a deferred, the
> DeferredList won't call its callbacks until the other Deferred operation
> completes. So you'll be stacking up a whole bunch of Deferreds inside
> the first one, and the callback on the DeferredList that does the
> reactor.stop won't fire until you don't return a Deferred.
> There might be an easier way to do this, but this the way I know
> (example attached). Someone please let me know if there's an easier way.
> def render_GET (self, request):
> self.rq = request
> target = escape(request.args['target'])
> d = getPage(target).addCallback(self.print_page)
> return server.NOT_DONE_YET
I'm gonna go ahead and answer my own question here - this isn't
restricted to DeferredLists, it applies to regular Deferred's too
More information about the Twisted-web