[Oz] NewStat

[Mikael Kindborg]

Many thanks for your reply. I guess things will sort out as I
continue to experiment. I have used pickled tickets for a port
and a stream to write chat application (my first coherent Oz
program!), and it was wonderfully simple once you got the
hang of it. The book you mention sounds very interesting.
Do you have an esitmated publishing date? Is there a draft
available?
Best, Micke

At 13:15 2001-01-30 +0100, Peter Van Roy wrote:

> > Hi all.
> >
> > I am exploring the distributed programming tutorial, and I am
> > puzzled by NewStat. Are you supposed to define NewStat
> > yourself? This seems like an important construct, is there
> > a built in version? Knowing what is built in and what you
> > have to define yourself is not always easy to tell from the tutorial.
> > Anyone have pointers to other places in the documentation?
> >
> > Best, Micke
>
>The built-in support for distribution is very simple:
>
>   Connection module: offering and taking tickets.  Because
>   of transparent distribution, this covers (almost) all
>   data types in the language.
>
>   Fault module: reflective fault handling.  All you need
>   to build fault tolerance abstractions in the language.
>
>The Remote and Pickle modules are also useful for distribution.
>The tutorial gives examples of how to write distributed
>programs; you can cut and paste from it, but its definitions
>(including NewStat) are not part of the system.
>
>The Connection and Fault modules have been designed so that
>users can define their own abstractions within the language.
>We are working on redoing the distribution layer to give the
>choice of mobile/stationary behavior for all stateful language
>entities.  We are also working on fault tolerance abstractions
>(a few exist already, cf. MOGUL).
>
>But you are right, it would be nice to have a collection of
>often-used definitions always available in the system right
>now.  NewStat is one of the most useful, and right now the
>only way to have it is to insert the definition in your
>program.  I and others plan to make a collection eventually,
>a superset of what exists in the tutorial (as part of a book
>on programming techniques based on Mozart that is in the works),
>but if you can't wait, you will have to collect the definitions
>yourself (unless some noble soul has already done it).
>
>Peter


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