Persistency question...

[Frank Fock]

Cuong Nguyen wrote:

>
> I think that makes sense.  If you would just provide the hooks we can
> provide the integration into a database with out much problems.  I've
> implemented an SNMP agent before where I wrap the SNMP stack around a set of
> C++ classes which provided persistency via the GNU DB (gdbm).  The way I did
> it was to "calculate" the key to the record using the OIDs of the rows.
> This way searching for a particular OID was easy because GDBM provides the
> necessary search for it.  The issue comes in when I have to implement
> getnext.  For that I implement a search tree optimized for lexicalgraphical
> walk and place the search tree into a seperate GDBM database.  I can now
> index anywhere into the table and find the next logical OID.
>
> I think this implementation could be general enough to make it work with
> Agent++ and everything would still be open source (actually I got a bit
> confused about the Agent++ licensing - I guess it is not GNU license so
> maybe it doesn't matter if we try to stick to GNU license only software - in
> that case there maybe other database options).
>
> Cuong.

Could you send me your source code concerning the database access?
It would interesting. I have written an oid search mechanism for AgentGen
using MySQL and Oracle. It would help me to find out the common needs of
accessing an underlying database.

TIA,
Frank