Re: 2nd gen Io

Sorry for the following dumb question :)

"Any object can become a domain ..."

In IO2, if I understand correctly, we have objects that represent execution
threads, these objects are called domains, and they "run" other objects (those
that belong to them)?








Selon Steve Dekorte <[email protected]>:

>
> I’d like to make the things that tend to be re-implemented in typical
> projects part of the language - security, persistence, concurrency,
> distribution and user interaction. All of these could be seen as mapping
> problems and their solution as adding explicit mapping boundaries.
>
> The first idea (which was probably already done in Smalltalk in 1980s) is to
> add a pointer to each object in the system to it’s “owner” and have object
> ownership domains where the domain leader is an actor/process whose execution
> thread is used for processing all messages sent to objects within it’s
> domain. Any object can become a domain of the objects below it in the
> ownership graph. Domain boundaries are used to solve the problems of security
> (tracking and verifying authority to invoke behaviors), concurrency (avoid
> unexpected state changes, closely associate execution with the state it will
> be working on), distribution and persistence (boundaries determine the state
> which needs to be persisted or moved).
>
> Part of the persistence component is to support the indexing and lazy loading
> of individual objects and standard representations that can be externally
> manipulated and returned and merged with an optimistic locking mechanism.
>
> The user interaction part involves extending slots to have metadata and a
> standard set of properties which are used for the interface mapping.
>
> This would be a big project but hopefully there will be time in the future to
> take a stab at it.
>
> Sorry for the delay in responding,
> Steve
>
> On Feb 24, 2014, at 6:06 AM, [email protected] wrote:
> > Come on Steve, there are Io fans who wanna hear about it! Let us chat.
> >
> > Selon Steve Dekorte <[email protected]>:
> >>
> >> On Feb 19, 2014, at 1:28 AM, [email protected] wrote:
> >>> Hi all,
> >>>
> >>> When there's no matching slot, the "forward" slot is activated.
> >>>
> >>> I have this idea about a "before" slot:
> >>>
> >>> If "before" doesn't exist, everything works as usual.
> >>>
> >>> If "before" exists, it is always activated (and it receives the message)
> >> before
> >>> the slot lookup. Then, it produces a message (possibly the same) which
> will
> >> be
> >>> treated as usual.
> >>>
> >>> This could be used to test whether the sender as the "right" to access a
> >>> particular slot, for example.
> >>
> >> Hi Julien,
> >>
> >> I like the idea. On my list for a 2nd gen Io is some form of support for
> >> rights on all objects.
> >>
> >>> Is there already a way to do this at user level?
> >>
> >> You can get the same effect using a proxy to forward message to the real
> >> object.
> >> Io uses proxies for futures and supports turning all references of one
> object
> >> to another.
> >>
> >>> Also, would anybody have a little constructive criticism about Io?
> >>
> >> Always welcome! :)
> >>
> >> Steve
>
>
>
>
>
> ------------------------------------
>
> Yahoo Groups Links
>
>
>
>




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