[omniORB] oneway messaging question

[Duncan Grisby]

On Wednesday 15 December, "David Woodbury" wrote:

> Does OmniOrb's oneway messaging support distribution/broadcast to
> multiple concurrent subscribers? I'd try this out myself but am in a
> holding pattern while my test system is upgraded with latest compiler.

No, and that's not what oneways are for. oneway just does a possibly
non-blocking, unreliable, call to a single server. In omniORB, oneways
are non-blocking unless you send so many that the TCP buffer fills up,
and almost always arrive. The only situation in which oneways are lost
is when the server-side closes the TCP connection while a oneway call
is in flight. Since there is no reply to a oneway, the ORB can't
detect this situation.

You can use oneway to make multiple concurrent calls to different
servers by just doing them one after the other, but that's nothing
like a broadcast / multicast. I guess what you want is an event
service which uses multicast to contact all subscribers. omniORB
doesn't have one of them.

HTH,

Duncan.

-- 
 -- Duncan Grisby  \  Research Engineer  --
  -- AT&T Laboratories Cambridge          --
   -- http://www.uk.research.att.com/~dpg1 --