Reactive Ruby - Truffle Ruby meets Reactive Programming

More info about Reactive Ruby can be found here: https://guidosalva.github.io/ReactiveRubyTruffle/

Reactive Ruby is an experimental reactive language, which extends Truffle Ruby.

Reactive Ruby should be executed on the Graal VM instead of the normal Java VM.

Installation

Install the Graal VM

A guide on how to install the Graal VM: https://wiki.openjdk.java.net/display/Graal/Instructions

Reactive Ruby

git clone git@github.com:guidosalva/ReactiveRubyTruffle.git
cd ReactiveRubyTruffle
mvn

Usage

The jt tool can be used to execute Reactive Ruby programs. (See: https://github.com/jruby/jruby/tree/master/truffle#workflow-tool)

jt run --graal examples/time.rb executes the following example which prints the current time every second.

time = timeB(1) 
time.onChange { |x| puts x}

jt run --graal examples/sum.rb executes the next example, which demonstrates some operators.

range = rangeB(1,100)

even = range.filter(0) { | x | 
	x.to_i % 2 == 0
}

sum = even.fold( 0 ) { |acc, val| 
	acc + val
}

combine = range.map(sum) { | x, y | [x,y] }

combine.onChange {|x| puts "sum: #{x}"}

The output is:

sum: [2, 2]
sum: [3, 2]
sum: [4, 6]
sum: [5, 6]
sum: [6, 12]
sum: [7, 12]
sum: [8, 20]
sum: [9, 20]
sum: [10, 30]
...