[Gambas-user] HttpClient question, now massively parallel!

[Caveat]

Thanks Benoit, I knew there had to be a simpler way :-D

On Wed, 2011-03-30 at 17:08 +0200, Benoît Minisini wrote:
> > Hi Ron_2nd
> > 
> > You're welcome!  I made a couple of improvements while I thought of
> > them.  It's probably better not to add the leading zero to the name of
> > the HttpClient, so just do something simple like NEW HttpClient AS
> > "tube" & freeSlot, then your event handling routines can be simply
> > tube0_Finished(), tube1_Finished()... tube200_Finished() etc.  You'll
> > probably need to take account of other events too like Connect, Error,
> > and Read (I presume in Read you'll actually be getting your data, so
> > you'll need to handle a collection of buffers or something...).  You'll
> > most likely also need to allow for timeouts.
> > 
> > I'd also suggest to make the numbered event handlers simple one-liners
> > that call back to a real handler... so for the Finished event:
> > 
> > ' This is the real handler for Finished, it takes a param of the index
> > ' of the httpClient that raised the Finished event
> > PUBLIC SUB tube_Finished(clientIndex as Integer)
> >   ' indicate that the slot has come free
> >   slots[clientIndex] = FALSE
> >   PRINT "Slot " & clientIndex & " finished"
> >   PRINT "Processed GET: " & getters[clientIndex].URL
> >   ... do some real work!
> > END
> > 
> > ' Each of the Finished event handlers is now super-simple and
> > ' should never need to change, as the real event handler (above) does
> > ' the work
> > PUBLIC SUB tube0_Finished()
> >   tube_Finished(0)
> > END
> > 
> > PUBLIC SUB tube1_Finished()
> >   tube_Finished(1)
> > END
> > 
> > ...
> > PUBLIC SUB tube200_Finished()
> >   tube_Finished(200)
> > END
> > 
> > I'm wondering if there isn't a way to programmatically generate the
> > event handlers, and have them know which event fired... freeing you from
> > the pain of copy-pasting a bunch of one-line SUBs.
> > 
> > You may want to get real fancy and start queuing requests once all your
> > slots are used up, or maybe just deny requests (note I return -1 if
> > there's no free slot) until something comes free again...
> > 
> > Have fun, let me know if anything is not clear.
> > 
> > Regards,
> > Caveat
> > 
> > P.S.  Should I have added a disclaimer that my code is not certified for
> > use in real-time radiation monitoring systems upon which the fate of the
> > world may depend?  ;-)
> > 
> 
> You don't have to create one event handler for each HttpClient of course! Just 
> use the same event handler.
> 
> Then how to make the difference between all HttpClient object?
> 
> 1) Use the LAST keyword to find the HttpClient inside the array where it is 
> stored.
> 
> 2) Or store the index inside the HttpClient.Tag property. That way you get it 
> directly without having to do a search.
> 
> Regards,
>