[omniORB] Implementation Repository

[James Waller]

Hello,

First I'd like to apologise for waiting until now
before posting anything on this subject. I was unable
to discover the recent interest on this topic until
now because I've been without an internet connection
for the first half of this month!

I'm very interested in joining this discussion as I
have been working on an Implementation Repository for
omniORB for almost 3 months now. It is nearly at the
point where it is usable; a working ImR daemon and
server interface library are just around the corner
(about two or three weeks before I have some code to
demonstrate). I intend to add an administration tool
as well. It only compiles on Linux at present and its
makefiles are independent of the autoconf system.

This ImR works in a very similar way to the one
described in the Henning paper and the "Advanced CORBA
Programming with C++" book. Server programs are
registered with the ImR by name, then one or more POAs
are registered with the ImR for each server. Any
object references created in those POAs at the server
are translated to references to the ImR. Each server
has configurable parameters such as command-line
arguments, activation mode, user, group and so on;
calls are present in the ImR interface for accessing
this information.

When a server starts up, it makes a call to the ImR to
notify the ImR of its availability. A "manager" object
is created in the ImR for each server with a
corresponding proxy object in the server itself,
provided by the server interface library. The manager
object is responsible for sending "ping" requests to
the server (to check if it is still alive at certain
points) and sending instructions telling servers to
terminate themselves in an orderly fashion. The
corresponding proxy object receives these requests and
deals with them in the appropriate way.

I will send some IDL in my next posting; is it okay to
attach files to mailing list posts?

Cheers,
James Waller

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