On Sun, 3 Jun 2007, Johann Glaser wrote:
> Hi! > > > > Usually the frontend does a remote procedure call to the backend. There > > > is one important problem I'm facing now. I want the backend (service > > > provider) to notify the frontend (service consumer) as soon as a new > > > measurement value has arrived. So this is the reverse direction of > > > communication. > > > > > > Is this possible? Can you please point me to information how to > > > accomplish this? > > > > This is not possible in SOAP, unless you do continuous polling. > > Is it possible to delay a SOAP call a few seconds at the service > provider (until new data is available)? Hmm, this reveals the question > what are the timeouts for TCP/IP connection and for the web services? I think a few seconds are possible, a timeout is usually longer than that. The webservices do not specify any values for timeouts. I'm not sure whether the HTTP protocol has such definitions, but I would be surprised if it had. Michael. _______________________________________________ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-pascal