Pure Ruby client that can send RPC calls to an Erlang node. It's very much a work in progress.
License: MIT License
-
Clone the project and enter the project directory and compile the project
git clone https://github.com/jacktang/rinterface.git` cd rinterface; rake;
-
In one terminal run the command:
rake daemon:start
This will start the erlang node named 'math'. -
Open another terminal, and run the rpc-call from client:
ruby examples/client.rb
TODO
In your Ruby code, make a call to the Erlang node like this:
r = Erlang::Node.rpc("math","math_server","add",[10,20])
if r[0] == :badrpc
puts "Got and Error. Reason #{r[1]}"
else
puts "Success: #{r[1]}"
end
Where:
- math is the node name (the -sname of the Erlang node)
- math_server is the name of the module
- add is the funtion to call
- [10,20] is an array of arguments to pass to the function
The result will always be an Array of the form:
[:ok, Response]
Where Response is the result from the Erlang, or:
[:badrpc, Reason]
Where Reason is the 'why' it failed.
The code above can be written like this now:
Erl::MathServer.add(10, 20)
(Ain`t Ruby a beauty? ;)
Here's a quick and simple example. Make sure you put the rinterface lib into RAILS_ROOT/lib and start the math_server in 'test' In the controller(controllers/math_controller.rb):
require "rinterface"
class MathController < ApplicationController
def index
a = params[:a]
b = params[:b]
r = Erlang::Node.rpc("math","math_server","add",[a.to_i,b.to_i])
if r[0] == :badrpc
@result = "Error"
else
@result = r[1]
end
end
end
Finally, add a template for the view, and try 'http://localhost:3000/math?a=2&b=3'. This is not ideal yet and not something I'd use yet in production, but it's a starting point for experimenting.
- Adopt BERT as decoder/encoder
- Fork the project
- Improve the code or add your idea
- Run specs before/after patching. Use either "rake spec" or "spec spec", it`ll start the erlang daemon automatically.
- Send me the pull request on Github
- Sync code from this fork if you want, act as below:
git remote add jackfork git://github.com/jacktang/rinterface.git git pull jackfork master git push origin