From: Dmitry Vasiliev <lists@...>
Date: 2013-06-12T05:42:50+09:00
Subject: [ANN] ErlPort (library to connect Erlang to Ruby) 1.0.0alpha released

Hi all,

I've just released ErlPort version 1.0.0alpha. ErlPort is a library for
Erlang which helps connect Erlang to a number of other programming
languages (currently supported Python and Ruby). Apart from using
ErlPort as a tool to call Python/Ruby functions from Erlang it also can
be used as a middleware for Python/Ruby instances.

Check http://erlport.org for more details.

The new version of ErlPort is basically a complete redesign and rewrite
of the project. The main changes in this version are:

- Redesigned as Erlang application
- Added support for all recent (2.5 and higher) versions of Python
- Added support for all recent (1.8.6 and higher) versions of Ruby
- Added support for custom data types

Why ErlPort can be interesting for Ruby developers?
---------------------------------------------------

Apart from calling Ruby functions from Erlang or Erlang function from
Ruby, ErlPort also allows to use Erlang as a middleware for Ruby.
The following is a small inter-process recursion example (place it in
roll.rb file). Actually this example will be even simpler with ErlPort
1.0.0.

include ErlPort
include ErlPort::Erlang

def roll n, procs=nil
    procs = [] if procs == nil
    procs.push Erlang.self
    puts "Hello from #{Process::pid}"
    if n > 1
        status, pid = call :ruby, :start, []
        if status == :ok
            procs = call :ruby, :call,
                         [pid, :roll, :roll, [n - 1, procs]]
        end
    end
    procs
end

And it can be used with Erlang shell and ErlPort like this:

1> {ok, R} = ruby:start().
{ok,<0.34.0>}
2> ruby:call(R, roll, roll, [5]).
Hello from 5892
Hello from 5894
Hello from 5896
Hello from 5898
Hello from 5900
[<0.34.0>,<0.37.0>,<0.40.0>,<0.43.0>,<0.46.0>]

--
Dmitry Vasiliev <dima at hlabs.org>
http://hlabs.org
http://twitter.com/hdima

-- 
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