Experimental Physics and
Industrial Control System

Ben Franksen <[email protected]> · Tue, 12 Oct 2010 19:51:57 +0200

On Dienstag, 12. Oktober 2010, Andrew Johnson wrote:
> On Friday 08 October 2010 21:10:26 [email protected] wrote:
> > I was wondering where the writes to the put log are done in the
> > gateway source code? I would like to try to modify the source to
> > allow multiple gateways to write this information to a central
> > database, but I'm having a bit of a hard time finding the calls in
> > the code.
>
> I believe this is done through an Access Security hook, so the
> gateway calls an asLib routine to check rights and that calls back
> into the hook routine. If you look at the documentation for asLib in
> the Application Developers' Guide you should find something about
> that, but if not ask again and I'll go hunting.

Right, at least that is how it is done on the IOC. You can even 
configure put logging in the access security configuration file; IIRC 
the gateway has such a file, too.

Note that --again, this is how it works on the IOC-- neither access 
security, nor any other part of the IOC knows anything about caPutLog. 
Instead, the initialization routine of the caPutLog facility registers 
a callback with access security (calling asTrapWriteRegisterListener), 
which in turn does the actual logging via calls to logClientSend (see 
src/libCom/logClient in base).

Cheers
Ben

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System