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mperham--sidekiq/lib/sidekiq/rails.rb
Samuel Cochran 659dea9601 Resolve Rails Reloader and ActiveRecord middleware incompatibility (#3166)
* Prevent AR middleware and reloader clash

The ActiveRecord middleware releases any current ActiveRecord
connections before the reloader has a chance to clear their query
caches.

We can just remove this middleware because the reloader takes care of
clearing active connections, too.

* Make sure folks haven't added the middleware manually

* Fix the conditional

* Mention that the reloader also clears connections

* Move it all back into a single method

* Typos

* Pull all rails setup into railtie

* Set the middleware even earlier

Also clarify exactly when these hooks are run.

* Only check ActiveRecord reloader/middleware sanity at boot
2016-09-30 15:27:54 -07:00

89 lines
3 KiB
Ruby

# frozen_string_literal: true
module Sidekiq
def self.hook_rails!
return if defined?(@delay_removed)
ActiveSupport.on_load(:active_record) do
include Sidekiq::Extensions::ActiveRecord
end
ActiveSupport.on_load(:action_mailer) do
extend Sidekiq::Extensions::ActionMailer
end
Module.__send__(:include, Sidekiq::Extensions::Klass)
end
# Removes the generic aliases which MAY clash with names of already
# created methods by other applications. The methods `sidekiq_delay`,
# `sidekiq_delay_for` and `sidekiq_delay_until` can be used instead.
def self.remove_delay!
@delay_removed = true
[Extensions::ActiveRecord,
Extensions::ActionMailer,
Extensions::Klass].each do |mod|
mod.module_eval do
remove_method :delay if respond_to?(:delay)
remove_method :delay_for if respond_to?(:delay_for)
remove_method :delay_until if respond_to?(:delay_until)
end
end
end
class Rails < ::Rails::Engine
# We need to setup this up before any application configuration which might
# change Sidekiq middleware.
#
# This hook happens after `Rails::Application` is inherited within
# config/application.rb and before config is touched, usually within the
# class block. Definitely before config/environments/*.rb and
# config/initializers/*.rb.
config.before_configuration do
if ::Rails::VERSION::MAJOR < 5 && defined?(::ActiveRecord)
Sidekiq.server_middleware do |chain|
require 'sidekiq/middleware/server/active_record'
chain.add Sidekiq::Middleware::Server::ActiveRecord
end
end
end
initializer 'sidekiq' do
Sidekiq.hook_rails!
end
# We have to add the reloader after initialize to see if cache_classes has
# been turned on.
#
# This hook happens after all initialziers are run, just before returning
# from config/environment.rb back to sidekiq/cli.rb.
config.after_initialize do
if ::Rails::VERSION::MAJOR >= 5
# The reloader also takes care of ActiveRecord but is incompatible with
# the ActiveRecord middleware so make sure it's not in the chain already.
if defined?(Sidekiq::Middleware::Server::ActiveRecord) && Sidekiq.server_middleware.exists?(Sidekiq::Middleware::Server::ActiveRecord)
raise ArgumentError, "You are using the Sidekiq ActiveRecord middleware and the new Rails 5 reloader which are incompatible. Please remove the ActiveRecord middleware from your Sidekiq middleware configuration."
else
Sidekiq.options[:reloader] = Sidekiq::Rails::Reloader.new
end
end
end
class Reloader
def initialize(app = ::Rails.application)
Sidekiq.logger.debug "Enabling Rails 5+ live code reloading, so hot!" unless app.config.cache_classes
@app = app
end
def call
@app.reloader.wrap do
yield
end
end
def inspect
"#<Sidekiq::Rails::Reloader @app=#{@app.class.name}>"
end
end
end if defined?(::Rails)
end