Applications Messaging Standard

Tony Linde Tony.Linde at leicester.ac.uk
Thu Feb 22 07:56:45 PST 2007


Whether or not it argues for a file-based approach, I would also ask that
any system is able to be implemented by a user with no admin privs over
their machine.

T.

> -----Original Message-----
> From: owner-apps at eso.org [mailto:owner-apps at eso.org] On 
> Behalf Of Isa Barbarisi
> Sent: 21 February 2007 09:58
> To: Thomas Boch
> Cc: apps at ivoa.net
> Subject: Re: Applications Messaging Standard
> 
> Dear all,
> 
> from the Client point of view I completely agree with Thomas 
> about doing 
> things as simply as possible, as initially planned. This can 
> encourage 
> developers to use the Plastic technology and get on board as soon as 
> possible, giving the possibility to work on what really 
> matters: messages.
> Orphaned files can be deleted after a proper check of their 
> status. For 
> example, when VOSpec tries to connect to the hub and fails I check if 
> there is a dot file. If there is no dot file I start an 
> internal one, if 
> there is a dot file I just throw an Exception. Of course here 
> I could be 
> a little bit more intelligent and delete it..
> I also agree with John that transferring complexity to the 
> server side 
> is the best approach. We are currently few applications using Plastic 
> and we didn't find serious problems for the lack of elegance.
> 
> At the end simplicity was one of the first Plastic goals and I 
> definitely propose to stay on this line as much as possible.
> 
> Best Regards,
> Isa Barbarisi
> 
> 
> Thomas Boch wrote:
> > Hi all,
> >
> > As for the bootstrap process, I'm still not convinced that we need a
> > socket-based approach. Sure, it is more elegant than the 
> file-based one,
> > but to me, this elegance does not counterbalance the additional
> > complexity at the client side.
> >
> > Are orphaned files really a problem ? If an application reads such a
> > file, tries to connect to the hub and fails, it sounds sensible to
> > consider this hub as dead, to delete the dot file, and 
> start up a new
> > hub.
> >
> > I think that one of the reasons of the rapid take-up of 
> PLASTIC is its
> > simplicity. I have nothing against designing a complex 
> architecture, as
> > long as we gain benefits from this complexity.
> >
> > Cheers,
> >
> > Thomas
> >   
> 
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