Celluloid Thread.current

main.rb

require 'celluloid/autostart'

class ExceptionHandler

  def self.notify(e)
    puts "Something has gone wrong" unless Thread.current[:context]
  end

end

Celluloid.exception_handler { |e| ExceptionHandler.notify(e) }
Celluloid.logger = Logger.new('/dev/null')

class Worker
  include Celluloid

  def run
    Thread.current[:context] = "The Error Context"
    raise "WAT"
  end

end

Worker.new.async.run