Using Emit in Other Languages

You can use Emit in other languages through the multilang API.

Defining Tasks

We’re going to define a node that takes a number and emits each integer in that range. Let’s do it with Ruby! (why not?)

require "json"
message = JSON.parse(

message["count"].times do |i|
  puts i.to_json

(the equivalent in Python is in examples/multilang/

The messages passed in and out are expected to be in JSON format. Output from the functions should be json strings separated by newlines.

Creating a Node

We’ll be subclassing emit.multilang.ShellNode to tell emit how to execute our task:

class RubyShellNode(ShellNode):
    command = 'bundle exec ruby test.rb'

After that, you can call your node and subscribe as normal.

Project Versions

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