Announcing Revactor: an Actor model implementation for Ruby 1.9

On Jan 24, 2008 7:52 AM, Paul B. [email protected] wrote:

It’s interestnig that you chose the make Actor inherit from Fiber. I’m
not sure but I think one side-effect of this is that it makes it
impossible to run an actor in another process transparently (which, if
you’re using a fully functional programming style, it should be possible
to do).

After talking with MenTaLguY about this he convinced me subclassing
Actor
from Fiber was dumb, particularly in regard to thread safety. In the
trunk
I’m working on a version where Actors are independent from their
underlying
fibers. Among other things this means that an Actors can be used
anywhere
in your program, and will be lazily created if one doesn’t currently
exist.

And, as you mentioned, it will also be possible to cleanly create
subclasses
of Actor which don’t use a fiber underneath (e.g. a distributed Actor
protocol built on top of DRb)

Have you done any performance measurements to compare against a threaded
model?

Not as yet, no

Tony A. schrieb:

It certainly can’t hold a candle to Erlang’s ~300 bytes, but it’s also
nowhere close to the overhead of a thread, especially in Ruby 1.9.

If Actor would be(come) a first-class citizen of Ruby, what would you
expect the footprint for each Actor to be?

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On Fri, 25 Jan 2008 03:10:35 +0900, “Tony A.”
[email protected] wrote:

And, as you mentioned, it will also be possible to cleanly create
subclasses of Actor which don’t use a fiber underneath (e.g. a distributed Actor
protocol built on top of DRb)

It’s also worth noting that it may not be necessary to subclass Actor:
duck-typing as an Actor will often be sufficient.

-mental

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