application_controller.rb

# frozen_string_literal: true

class ApplicationController < ActionController::Base

  def index
    MyService.async_call(current_user)
  end
end

datadog-tracer.rb

# config/intitalizers/datadog-tracer.rb
require "ddtrace"
require "fast_jsonapi/instrumentation/skylight"

Datadog.configure do |c|
  if Rails.env.production?
    c.analytics_enabled = true
    c.use :rails, service_name: "redact"

    c.use :active_record, describes: :primary, service_name: 'write-db'
    c.use :active_record, describes: :primary_replica, service_name: 'read-db'
    

    c.env = "prod"
    c.use :redis, analytics_enabled: true
    
    c.use :aws, analytics_enabled: true
    c.use :http, analytics_enabled: true
    c.use :action_cable, analytics_enabled: true
    
   
    c.use :redis, describes: { url: 'redis://redact/3' }, service_name: 'redact', analytics_enabled: true
    c.use :redis, describes: { url: 'redis://redact/2' }, service_name: 'redact', analytics_enabled: true
    c.use :redis, describes: { url: 'redis://redact/6' }, service_name: 'redact', analytics_enabled: true
    c.use :redis, describes: { url: 'redis://redact/0' }, service_name: 'redact', analytics_enabled: true
    c.use :redis, describes: { url: 'redis://redact' }, service_name: 'redact', analytics_enabled: true
  elsif Rails.env.staging?
   # snipped
  else
   # snipped
  end
end

gemfile.lock

ddtrace (0.38.0)
  msgpack
rails (6.0.3.2)
      actioncable (= 6.0.3.2)
      actionmailbox (= 6.0.3.2)
      actionmailer (= 6.0.3.2)
      actionpack (= 6.0.3.2)
      actiontext (= 6.0.3.2)
      actionview (= 6.0.3.2)
      activejob (= 6.0.3.2)
      activemodel (= 6.0.3.2)
      activerecord (= 6.0.3.2)
      activestorage (= 6.0.3.2)
      activesupport (= 6.0.3.2)
      bundler (>= 1.3.0)
      railties (= 6.0.3.2)

my_service.rb

# app/services/my_service.rb
class MyService < Service
  attr_reader :user
  def initialize(user)
    @user = user
  end
  
  def call
    pp user
  end
end

service.rb

# app/services/service.rb

class Service
  private_methods :new

  class << self
    def call(*args)
      new(*args).call
    end

    def async_call(*args)
      ServiceJob.perform_later(to_s, args)
    end
  end
end

service_job.rb

# app/jobs/service_job.rb
class ServiceJob < ApplicationJob
  queue_as :default

  def perform(service_name, args)
    service_name.constantize.call(*args)
  end
end

ActiveJob::SerializationError: Unsupported argument type: Datadog::Span
  from active_job/serializers.rb:28:in `serialize'
  from active_support/callbacks.rb:121:in `block in run_callbacks'
  from active_support/callbacks.rb:139:in `run_callbacks'
  from active_job/enqueuing.rb:55:in `enqueue'
  from active_job/enqueuing.rb:22:in `perform_later'
  from app/services/service.rb:12:in `async_call'