Project

bg

0.01
Bugfix fork ofattribute_normalizer
No commit activity in last 3 years
No release in over 3 years
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 Popularity
Downloads
17,334
Stars
48
Forks
1
Watchers
3
 Releases
Current version
0.0.5
Total releases
5
First release
2014-09-11
Latest release
2016-10-03
 Pull Requests
Open Pull Requests
1
Closed Pull Requests
0
Merged Pull Requests
3
Pull Request Acceptance Rate
75%
 Development
Primary Language
Ruby
Licenses
MIT
Average date of last 50 commits
2016-08-14
Reverse Dependencies
0

 Dependencies

Development

coveralls
>= 0
pry
>= 0
pry-nav
>= 0
pry-stack_explorer
>= 0
purdytest
>= 0
rake
>= 0

Runtime

activejob
>= 5.0
activerecord
>= 5.0
concurrent-ruby
>= 1.0
globalid
>= 0.3
 Project Readme

Lines of Code Maintainability Build Status Coverage Status Downloads

Bg

Non-blocking ActiveRecord method invocation

This library allows you to invoke ActiveRecord instance methods in the background.

  • Bg::Asyncable uses concurrent-ruby to execute methods in a different thread
  • Bg::Deferrable uses ActiveJob to execute methods in a background process

Quickstart

Setup

class User < ApplicationRecord
  include Bg::Asyncable::Behavior  # uses concurrent-ruby
  include Bg::Deferrable::Behavior # uses ActiveJob
end

Usage

user = User.find(params[:id])

# blocking in-process
user.do_hard_work

# non-blocking in-process separate thread
user.async.do_hard_work

# non-blocking out-of-process background job
user.defer.do_hard_work
user.defer(queue: :low, wait: 5.minutes).do_hard_work

Deferrable

Bg::Deferrable leverages GlobalID::Identification to marshal ActiveRecord instances across process boundaries. This means that state is not shared between the main process & the process actually executing the method.

  • Do not depend on lexically scoped bindings when invoking methods.
  • Do not pass unmarshallable types as arguments. Bg::Deferrable will prepare arguments for enqueuing, but best practice is to follow Sidekiq's simple parameters rule.

Examples

Good

user = User.find(params[:id])
user.defer.do_hard_work 1, true, "foo"

Bad

user = User.find(params[:id])
# in memory changes will not be available in Bg::Deferrable invoked methods
user.name = "new value"

# args may not marshal properly
user.defer.do_hard_work :foo, Time.now, instance_of_complex_type

user.defer.do_hard_work do
  # blocks are not supported
end

Asyncable

Bg::Asyncable disallows invoking methods that take blocks as an argument.

  • Important: It's your responsibility to protect shared data between threads

Examples

Good

user = User.find(params[:id])
user.name = "new value"
user.async.do_hard_work 1, true, "foo"
user.async.do_hard_work :foo, Time.now, instance_of_complex_type

Bad

user = User.find(params[:id])

user.async.do_hard_work do
  # blocks are not supported
end