| Re: Socket server in > IDL 6.3 [message #55004] |
Fri, 27 July 2007 03:55  |
rtowler
Messages: 28
Registered: June 2006
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Junior Member |
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On Jul 27, 12:23 am, Robbie <ret...> wrote:
> I've been mucking about with the undocumented feature of SOCKET, /
> LISTEN in IDL.
>
> Copying the synopsis from a previous post last year
<snip>
>
> I've found that FILE_POLL_INPUT is absolutely essential in setting up
> a socket server. FILE_POLL_INPUT
> has difficulties when you mix listening and connected LUNs, although
> you can check each separately by using the TIMEOUT=0 keyword.
>
> I've come across a difficult bug. I want to read at least 100K chunks
> of data over the incoming stream. READU produces a runtime error if
> the operation blocks. The server seems to work for a while, and then
> it suddenly stops and produces the "OPERATION BLOCKS" error. If I exit
> from IDL and come back in, the server seems to work ok again. When the
> error occurs the (FSTAT(lun)).TRANSFER_COUNT is set to something like
> 630k and this is the exact same number every time the error occurs
> regardless of the size of the chunks of data.
>
> Has anyone else had this experience?
>
> Robbie
>
> http://barnett.id.au/idl
Have you tried Randall Frank's TCP socket library? It's part of his
idl_tools package available from Ronn Kling's website. It implements
both client and server sockets and you can easily compile it
separately if you don't want to package the whole library with your
application. FWIW, I modified it for UDP sockets and it works great.
-Rick
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| Re: Socket server in > IDL 6.3 [message #55087 is a reply to message #55004] |
Fri, 27 July 2007 19:08  |
Robbie
Messages: 165
Registered: February 2006
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Senior Member |
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Thanks for the reply,
I've had a brief look at it a few times. I think that I'm conditioned
to the use of writeu and readu and I'm a little hesitant about sendvar
and recvvar.
I've been persisting object states as structures. I was using readu/
writeu to implement a messaging protocol for this.
I was looking at writing an initial implementation of my server in IDL
and then porting it Python once I had a stable messaging protocol.
I'm actually planning on writing a server which does object
persistence with the backing store as a mixture of the server
filesystem and a database.
Robbie
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