Jonas Johansson wrote:
Hi list,

Maybe someone here has some knowledge on SOAP. I have been looking into
the OGC move towards W3C Web Services standards for geospatial services
and I have a question regarding performance when using SOAP.

It is mentioned by many that large data sets is a performance issue when
using SOAP messaging because the entire message need to be buffered at
the server before sending a response to a client. Is this true? In that
case, why?
You know, I read something similar as well about SOAP, and I had the same reaction. I couldn't think of any fundamental reason that such a thing would be true (though there very well could be), I took it to mean more that it's just how most people implemented SOAP stuff.


Can't a SOAP enabled WFS server simply start sending a SOAP response
message in a streamed fashion when responding to a WFS GetFeature
request to include GML that is dynamically generated from a database,
potentially delivering thousands of gigabytes of data encoded in the
SOAP message body?
That's definitely what we're going to do with GeoServer. We'll have to do it for WFS 1.1, and all you do is wrap SOAP headers around your response. I see no reason you can't just stream out as normally - but perhaps OGC is doing something different than how SOAP is supposed to work? I don't really know, so don't go by my word, and let me know if you figure out that there is some limit. But I'm with you, I see no reason you can't just stream it in the same way.

best regards,

Chris


Thank you for any help!

Jonas J



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