Worcr is a GPL-licensed background job processor. It is extremely fast (up to 100k no-op jobs per second on a single process) and doesn't have any back-end dependencies (it uses embedded SQLite database). Worcr is built on Crystal, which syntax is pretty much similar to Ruby's:
require "worcr/worker"
require "worcr/job"
struct Jobs::Email::Greet
include Worcr::Job
def initialize(@email : String)
end
def perform(client)
client.send(@email, "Welcome!")
end
end
class Workers::Emailer < Worcr::Worker(Jobs::Email::Greet)
def initialize
@client = EmailClient.new(ENV["API_TOKEN"])
end
def perform(job)
job.perform(client)
end
end
worker = Workers::Emailer.new
worker.work