Ultra simple event broker made using Ruby

simple_event_broker.rb

class Action
  attr_reader :name, :payload, :callback

  def initialize(**args, &block)
    @name = args[:name]
    @payload = args[:payload] || {}
    @callback = block || proc {}
  end

  def process(payload)
    @callback.call(@payload.merge!(payload))
  end
end

class EventBroker
  def initialize
    @events = {}
  end

  def subscribe(actions = [])
    actions.each do |action|
      @events[action.name.to_sym] = action
    end
  end

  def raise(name, **args)
    payload = args[:payload]

    @events[name.to_sym].process(payload)
  end
end

event_broker = EventBroker.new

actions = []
actions << Action.new(name: "ActionOne", payload: { arg: 1 }) do |payload|
  p payload
end

event_broker.subscribe(actions)
event_broker.raise("ActionOne", payload: { timeout: 100, retry: false })