Applications Messaging Standard

[John Taylor]

On 16 Feb 2007, at 11:24, Mark Taylor wrote:

> On Fri, 16 Feb 2007, John Taylor wrote:
>
>> On 16 Feb 2007, at 09:25, Tony Linde wrote:
>>> Can I ask if we all are talking about the same thing here? What  
>>> are we
>>> trying to discover at runtime with this file-based mechanism?
>>> Where the hub is and how to invoke it?
>>> How to communicate with the hub?
>>> What other plastic apps are running and what they can do?
>>
>> Hi Tony,
>> I believe we are just trying to discover where the hub is and how  
>> to invoke it.
>
> Not sure if I'm being pedantic here, but I'd say we're talking here
> about only how to communicate with an existing (running) hub, not  
> how to invoke it - invoke to me means start up a process which runs  
> a hub, and that's not what the ~/.ivoamsg file would do.
> Invoking a hub is, to me, an implementation thing.

Agreed.  That's what I meant to say.

>
>>     For instance, if a hub supported xmlrpc as a wire protocol  
>> then it would need to get the URL of its xmlrpc server to the  
>> clients, perhaps by writing this URL into a file in a well-known  
>> location.  Thereafter, all the discovery of other applications and  
>> their capabilities takes place by talking to the hub on this URL.
>
> .. but I agree with this explanation.
>
> Mark
>
> -- 
> Mark Taylor   Astronomical Programmer   Physics, Bristol  
> University, UK
> m.b.taylor at bris.ac.uk +44-117-928-8776 http://www.star.bris.ac.uk/ 
> ~mbt/
>