[omniORB] newbie quick queries

[Eric Damphousse]

Hi Ulf,

Thanks for the reply... That helps quite a bit. There are definitely 
pros and cons to automatic server activation, one big one that comes to 
mind is security. I have dealt in the past with DCOM security and, well, 
ouch. I can definitely move ahead with servers pre activated for now.

Since I have you "on the line", I have been playing around with one 
little servant object I have written that returns the host name of the 
machine it is currently running on. My current setup is as such: 1 
Solaris for my client and 1 active servant object, 1 XP that is running 
the name service and 1 Linux that is also running an active servant 
object. Both servant objects are identical, i.e., they return the host 
name of the box. I have create a simple naming service hierarchy, being 
Hillsboro.Tests/TestObject.

When I deactivate the servant object running on my Solaris box, and run 
the client, all works beautifully, i.e. the servant object running on 
the Linux system responds correctly. If I start the servant object on my 
Solaris box then rerun the client, I get a CORBA::SystemException: 
N5CORBA12COMM_FAILUREE on the client and a core dump of my servant 
object on the Solaris box, and I am not to sure why. My guess is that my 
name service is not properly setup, i.e. is it not specific enough. I 
have a few ideas that might fix the problem, but I cant say I feel at 
ease with them. So my question is how does one deal with such a setup in 
a CORBA way of doing things?

Thanks again....
Eric


Ulf Stoermer wrote:

>Hi Eric,
>
>even though CORBA and COM are conceptually very similar
>this is an area where they differ completely.
>CORBA doesn't provide for automatic server activation on ORB level.
>In this case you need the help of an implementation repository.
>Turn to chapter 14.4 of your book Advanced CORBA Programming
>to read in more detail about it.
>OmniORB doesn't offer an implementation repository at the moment
>but it should be possible to use one from another vendor/project
>e.g. from the TAO orb.
>On the other hand, a bunch of people are currently working on an
>implementation repository for Omni, but I have no idea what the
>current status is. Maybe someone of them can speak out?
>
>Cheers
>
>Ulf
>
>
>  
>
>>-----Original Message-----
>>From: omniorb-list-bounces at omniorb-support.com
>>[mailto:omniorb-list-bounces at omniorb-support.com]On Behalf Of Eric
>>Damphousse
>>Sent: Saturday, 28 June 2003 1:11 AM
>>To: OmniORB
>>Subject: [omniORB] newbie quick queries
>>
>>
>>Hi all,
>>
>>I have a few questions concerning a few items that I don't have a clear 
>>idea of
>>
>>1. servant objects
>>    I have my client on one machine, server on another, up and running. 
>>On the server, there is an object that the client wants to use. Does the 
>>object need         to be running (instantiated) for it to be usable, or 
>>can the server start it up when the client queries for it. If so, can 
>>someone clue me in... cause I have         found nothing (which doesn't 
>>mean much) on how to do this. Under COM I would need to do a 
>>cocreateinstance of the object, and it would start up, if     not 
>>already running. Is there something similar I can do with CORBA.
>>
>>Hey, that's only one question!
>>
>>Thanks in advance...
>>Eric
>>   
>>
>>
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>>
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