Re: SOAP-over-UDP

Mark/Francesco
I would caution on use of UDP as the SOAP Portocols (e.g. HTTP) is/are 
decidely not UDP but instead a connection-oriented TCP
To date I have not seen UDP Ports used for SOAP transmission although since 
there is no requirement for verifiable connection and or handshakes
I would venture to guess UDP is available as the transmission medium but I 
have not seen any UDP Ports used for SOAP thus far
Anyone else ???
Ciao-
Martin-

----- Original Message ----- 
From: "mdonaghue" <[email protected]>
To: <[email protected]>; "'Francesco Munari'" <[email protected]>
Sent: Saturday, May 28, 2005 3:14 PM
Subject: RE: SOAP-over-UDP


> Hi Franceso,
>
> I've worked briefly with the apache soap api, not that familiar with it.
> Typically a soap message is sent to a single soap server address, which is
> specified by a url or an ip address, as well as a port. So your server
> address on the LAN might be something like 192.168.100.2:8080. (I'm not 
> sure
> what the port is for UDDI, so just using standard TomCat Web Server port).
>
> IIRC, you there's a point at which you specify that address in the setup 
> for
> your soap call. One thing you could try is to change the address to the
> subnet's broadcast address, 255.255.255.0:8080, assuming a class c network
> where the first 3 quads specify the network portion of the submask.
>
> However, this may not a scalable solution, since the broadcast wouldn't
> carry beyond the physical subnet on which you are located. Using UDDI to
> discover services is one thing, but dynamically discovering UDDI servers 
> is
> obviously a different problem. It also doesn't address the issue of more
> than one UDDI server running on the same subnet.
>
> A more generalized solution might involve a distributed ip lookup service,
> namely DNS. For example when DNS looks up the ip address of Yahoo.com, at
> some point the actual ip address that serves the request is dynamically
> assigned to one of dozens (or hundreds) of servers based on a scheduling
> scheme.  You could locally enable DNS lookup, and create an entry based on
> some url like "myuddpsever.com", and give it your local UDDI server's ip
> address, and the rest would be handled within the network. The advantage 
> to
> this is your UDDP server could be anywhere and your message would still
> reach it.
>
> hth,
> Mark
>
>
>
>
>
> -----Original Message-----
> From: Francesco Munari [mailto:[email protected]]
> Sent: Saturday, May 28, 2005 4:58 AM
> To: [email protected]
> Subject: SOAP-over-UDP
>
> Hi, I'm desperate!
> I'm trying to find out how to send a broadcast SOAP request to a UDDI
> registry in a LAN, but I'm not able to do this. I've looked for some
> example but I've not found anithing.
>
> Please...could anybody help me?
> I'm making a thesis for the University of Florence (Italy) and I have
> to discovery dinamically web service published in some UDDI registry
> somewhere in a LAN. I have to send a broadcast SOAP request to these
> UDDI registry (as I wrote few lines above).
> Of course I'm using Java language.
>
> Thank you very much for your help...I'm in a great hurry...thanks very
> very much to everyone could help me!
>
> Best reguards,
>
> Francesco
>
>