[omniORB] Help Orbix and OmniOrb Spawning

[Richard Hardgrave]

Andrew,

We do just such a thing in our project, but it's not the
exact architecture you'll see in Henning & Vinoski,
"Advanced CORBA Programming with C++". Also, take a look
at the $TOP/src/examples/poa/servant_manager directory.

Our implementation is rather simple. We have a special
servant assigned to "manage" a cluster of other servants.
This is because they all share a non-re-entrant library.
The clients get references only through the manager.
The manager keeps track of the servants with its own
local data structures and handles "introducing" them to
the clients by passing their IORs to them.  The clients
tell the manager when they are through with the servant,
and the manager re-cycles it.
The servants and servant manager are, initially, spawned
independently, and the manager gets their IORs through
the Naming Service (after they register, of course).
Obviously, for a different application, one doesn't
necessarily have to be limited to getting references
only through the manager.

Regards,

Richard

> From owner-omniorb-list@uk.research.att.com Wed Feb  6 20:32 CST 2002
> X-Sender: makwha@confucius.stee.com.sg
> Date: Thu, 07 Feb 2002 10:21:03 +0800
> To: omniorb-list@uk.research.att.com
> From: Andrew Mak <makwha@stee.com.sg>
> Subject: [omniORB] Help Orbix and OmniOrb Spawning
> Mime-Version: 1.0
> X-Loop: omniorb-list@uk.research.att.com
> 
> Hi,
> 
> I am writing regarding the below mail Sai-Lai Lo wrote back in July 1997. I 
> was wondering  if anyone could you tell me more information regarding 
> creating a daemon (like Orbix) in OmniOrb. Basically what we require is to 
> spawn the server on demand, just like orbix. Currently we are using orbix 
> 2.3c and wish to port to OmniOrb.
> 
> Sai-Lai Lo are you still around? I know that Olivetti & Oracle Research Lab 
> was bought over by ATT in 1999.
> 
> Any advice from anyone would be much appreciated! Can reply direct as well!
> 
> Regards and TIA!
> 
>    /\       |\  /|
>   /--\ndrew | \/ |ak
> /    \     |    |
> 
> Singapore Technologies Electronics Ltd
> Product Development & Management Division (PDMD)
> Large-Scale Systems Group
> (65) 413 1613 (Direct)
> (65) 484 8841 (Fax)
> mailto:makwha@stee.com.sg
> www.stee.com.sg
> 
> >Re: Auto startup of servers
> >
> >Sai-Lai Lo (S.Lo@orl.co.uk)
> >Tue, 8 Jul 1997 17:08:24 +0100
> >·       Messages sorted by: ·   [ date ] ·      [ thread ] ·    [ subject 
> >] ·   [ author ]
> >·       Next message: · Sai-Lai Lo: "Re: OmniORB2 for Windows NT/Alpha"
> >·       Previous message: ·     Sai-Lai Lo: "Re: omniorb2 on NT"
> >
> > >>>>> Anant Rao writes:
> > > Visibroker has a facility called, 'oad', that starts a server, if
> > > not running, when a client makes a call to the server. This is
> > > like a server-on-demand.
> > > Is there such a facility in omniOrb also or any way we can
> > > emulate it?
> >This dynamic server activition policy is one of the four activition
> >policies described in the Basic Object Adaptor specification.
> >omniORB only supports the persistent server policy and not 'server-on-demand'.
> >Having said that, all the APIs are there in omniORB to implement a daemon
> >application to do what is provided by Visibroker's oad or Orbix's orbixd.
> >If anyone is interested in implementing this daemon, please contact us for
> >more information.
> >Regards,
> >Sai-Lai Lo
> >--
> >E-mail:         S.Lo@orl.co.uk          |       Olivetti & Oracle Research Lab
> >                                         |       24a Trumpington Street
> >Tel:            +44 223 343000          |       Cambridge CB2 1QA
> >Fax:            +44 223 313542          |       ENGLAND
> 
>