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  1. 1
      .gitignore
  2. 3
      .rspec
  3. 3
      Gemfile
  4. 44
      Gemfile.lock
  5. 661
      LICENSE
  6. 47
      README.md
  7. 77
      lib/sidekiq/workflow.rb
  8. 149
      lib/sidekiq/workflow/client.rb
  9. 71
      lib/sidekiq/workflow/job.rb
  10. 69
      lib/sidekiq/workflow/worker.rb
  11. 19
      sidekiq-workflow.gemspec
  12. 64
      spec/job_spec.rb
  13. 109
      spec/spec_helper.rb
  14. 109
      spec/workflow_spec.rb

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.gitignore vendored
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/tmp/

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.rspec
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--require spec_helper
--format progress
--format html --out tmp/rspec.html

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Gemfile
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source 'https://rubygems.org'
gemspec

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PATH
remote: .
specs:
sidekiq-workflow (0.0.0)
redis (~> 4.3, >= 4.3.1)
redlock (~> 1.2, >= 1.2.1)
sidekiq (~> 6.2, >= 6.2.1)
GEM
remote: https://rubygems.org/
specs:
connection_pool (2.2.5)
diff-lcs (1.4.4)
rack (2.2.3)
redis (4.3.1)
redlock (1.2.1)
redis (>= 3.0.0, < 5.0)
rspec (3.10.0)
rspec-core (~> 3.10.0)
rspec-expectations (~> 3.10.0)
rspec-mocks (~> 3.10.0)
rspec-core (3.10.1)
rspec-support (~> 3.10.0)
rspec-expectations (3.10.1)
diff-lcs (>= 1.2.0, < 2.0)
rspec-support (~> 3.10.0)
rspec-mocks (3.10.2)
diff-lcs (>= 1.2.0, < 2.0)
rspec-support (~> 3.10.0)
rspec-support (3.10.2)
sidekiq (6.2.1)
connection_pool (>= 2.2.2)
rack (~> 2.0)
redis (>= 4.2.0)
PLATFORMS
x86_64-linux
DEPENDENCIES
rspec (~> 3.10, >= 3.10.0)
sidekiq-workflow!
BUNDLED WITH
2.2.16

661
LICENSE
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GNU AFFERO GENERAL PUBLIC LICENSE
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PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
SUCH DAMAGES.
17. Interpretation of Sections 15 and 16.
If the disclaimer of warranty and limitation of liability provided
above cannot be given local legal effect according to their terms,
reviewing courts shall apply local law that most closely approximates
an absolute waiver of all civil liability in connection with the
Program, unless a warranty or assumption of liability accompanies a
copy of the Program in return for a fee.
END OF TERMS AND CONDITIONS
How to Apply These Terms to Your New Programs
If you develop a new program, and you want it to be of the greatest
possible use to the public, the best way to achieve this is to make it
free software which everyone can redistribute and change under these terms.
To do so, attach the following notices to the program. It is safest
to attach them to the start of each source file to most effectively
state the exclusion of warranty; and each file should have at least
the "copyright" line and a pointer to where the full notice is found.
<one line to give the program's name and a brief idea of what it does.>
Copyright (C) <year> <name of author>
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
Also add information on how to contact you by electronic and paper mail.
If your software can interact with users remotely through a computer
network, you should also make sure that it provides a way for users to
get its source. For example, if your program is a web application, its
interface could display a "Source" link that leads users to an archive
of the code. There are many ways you could offer source, and different
solutions will be better for different programs; see section 13 for the
specific requirements.
You should also get your employer (if you work as a programmer) or school,
if any, to sign a "copyright disclaimer" for the program, if necessary.
For more information on this, and how to apply and follow the GNU AGPL, see
<https://www.gnu.org/licenses/>.

47
README.md
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# Sidekiq::Workflow
## Why yet another Sidekiq workflow library?
[`easymarketing/sidekiq_workflows`](https://github.com/easymarketing/sidekiq_workflows])
is only usable with [Sidekiq Pro](https://sidekiq.org/products/pro.html)
[`chaps-io/gush`](https://github.com/chaps-io/gush) move from Sidekiq to
ActiveJob on their [1.0](https://github.com/chaps-io/gush/releases/tag/v1.0.0)
and [don't support](https://github.com/chaps-io/gush/issues/18)
all advanced Sidekiq configuration like `sidekiq_options` or `sidekiq_retry_in`
because all jobs are encapsulated on a single (and shared) Sidekiq class worker.
This library try to keep all Sidekiq features available at job level,
using [`Module#prepend`](https://ruby-doc.org/core-2.7.3/Module.html#method-i-prepend)
to encapsulate own workflow behaviour around classic Sidekiq worker behaviour.
## How to use it
```ruby
require 'sidekiq/workflow'
Sidekiq::Workflow.configure url: 'redis://localhost/0'
class FetchJob
include Sidekiq::Workflow::Worker
sidekiq_options queue: :default, retry: 3
sidekiq_retry_in { 10 }
def perform(...) end
end
class SampleWorkflow < Sidekiq::Workflow
def configure(url_to_fetch_from)
fetch1 = job FetchJob, { url: url_to_fetch_from }
fetch2 = job FetchJob, { some_flag: true, url: 'http://example.com' }
persist1 = job PersistJob, after: fetch1
persist2 = job PersistJob, after: fetch2
index = job Index
job Normalize, after: [persist1, persist2], before: index
end
end
SampleWorkflow.start! 'http://example.net'
```

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lib/sidekiq/workflow.rb
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require 'sidekiq'
class Sidekiq::Workflow
attr_reader :id
attr_reader :jobs, :depends
def self.configure(config)
Client.instance.configure config
end
def initialize(id, jobs = {})
@id = id
@jobs = jobs
@depends = []
end
def start!
initial_jobs = self.initial_jobs
initial_jobs.each { |_, j| j.perform }
end
def persist!
Client.instance.persist_workflow self
end
def self.start!(...)
workflow = self.create
workflow.configure(...)
depends = workflow.depends
jobs = workflow.jobs
jobs.each do |id, job|
job.before = depends.select { |b, _| b == id }.collect &:last
job.after = depends.select { |_, a| a == id }.collect &:first
end
workflow.persist!
workflow.start!
workflow
end
def self.find(id)
Client.instance.load_workflow id
end
def status
return :failed if @jobs.any? { |_, j| j.failed? }
return :error if @jobs.any? { |_, j| j.error? }
return :finished if @jobs.all? { |_, j| j.finished? }
return :pending
end
private
def self.create
self.new SecureRandom.uuid
end
def job(*args, before: nil, after: nil)
job = Job.create self, *args, {}
id = job.id
@jobs[id] = job
Array(before).each { |b| @depends << [id, b] } if before
Array(after).each { |b| @depends << [b, id] } if after
id
end
def initial_jobs
@jobs.select { |_, j| j.initial_job? }.to_h
end
end
require 'sidekiq/workflow/client'
require 'sidekiq/workflow/worker'
require 'sidekiq/workflow/job'

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lib/sidekiq/workflow/client.rb
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require 'singleton'
require 'redlock'
require 'json'
class Sidekiq::Workflow::Client
include Singleton
def configure(config)
@ttl = config.delete(:ttl) { 60 * 60 * 24 * 30 }
Sidekiq.configure_server { |c| c.redis = config }
Sidekiq.configure_client { |c| c.redis = config }
@redlock = Redlock::Client.new [Redis.new(config)]
end
def persist_workflow(workflow)
self.redis do |redis|
jobs = workflow.jobs
self.persist_jobs redis, jobs
key = "workflow::#{workflow.id}"
redis.hset key, {
class: workflow.class,
jobs: jobs.values.collect(&:id).join("\n")
}
redis.expire key, @ttl
end
end
def load_workflow(id)
self.redis do |redis|
key = "workflow::#{id}"
raise "Workflow #{id} not found" unless redis.exists? key
workflow = redis.hgetall key
jobs = workflow['jobs'].split "\n"
jobs = self.load_jobs redis, jobs
Sidekiq::Workflow.new id, jobs
end
end
def persist_job(job)
self.redis { |r| self._persist_job r, job }
end
def load_job(id)
self.redis { |r| self._load_job r, id }
end
def lock(key, ttl, &block)
@redlock.lock key, ttl, &block
end
def set_payload(id, name, value)
value = case value
when Hash, Array
JSON.dump value
else
value
end
self.redis do |redis|
redis.hset "workflow::payload::#{id}", name, value
end
end
def get_payload(id, name, type = :string)
self.redis do |redis|
value = redis.hget "workflow::payload::#{id}", name
return case type
when :string
value
when :boolean
value == 'true'
when :integer
value.to_i
when :float
value.to_f
else
JSON.parse value
end
end
end
private
def redis(&block)
# @pool.with { |r| r.multi &block }
#@pool.with { |r| block.call r }
Sidekiq.redis &block
end
def persist_jobs(redis, jobs)
jobs.each { |_, j| self._persist_job redis, j }
end
def _time(time)
return unless time
Time.at time.to_f
end
def _persist_job(redis, job)
key = "job::#{job.id}"
before = job.before
after = job.after
errors = job.errors
args = job.args
redis.hset key, {
workflow: job.workflow,
class: job.klass,
args: args.empty? ? nil : JSON.dump(args),
before: before.empty? ? nil : before.join(','),
after: after.empty? ? nil : after.join(','),
enqueued_at: job.enqueued_at&.to_f,
started_at: job.started_at&.to_f,
finished_at: job.finished_at&.to_f,
error_at: job.error_at&.to_f,
failed_at: job.failed_at&.to_f,
errors: errors.empty? ? nil : errors.join("\n")
}.compact
redis.expire key, @ttl
end
def _load_job(redis, id)
key = "job::#{id}"
raise "Job #{id} not found" unless redis.exists? key
job = redis.hgetall key
workflow = job.fetch 'workflow'
klass = Object.const_get job.fetch 'class'
args = job['args']
args = args ? JSON.load(args) : []
before = job.fetch('before', '').split(',')
after = job.fetch('after', '').split(',')
errors = job.fetch('errors', '').split "\n"
enqueued_at = _time job['enqueued_at']
started_at = _time job['started_at']
finished_at = _time job['finished_at']
error_at = _time job['error_at']
failed_at = _time job['failed_at']
Sidekiq::Workflow::Job.new workflow, id, klass, *args,
before: before, after: after,
enqueued_at: enqueued_at, started_at: started_at,
finished_at: finished_at, error_at: error_at,
failed_at: failed_at, errors: errors
end
def load_jobs(redis, ids)
ids.collect do |id|
job = self._load_job redis, id
[job.id, job]
end.to_h
end
end

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class Sidekiq::Workflow::Job
attr_reader :workflow, :id, :klass, :args, :errors
attr_accessor :before, :after,
:enqueued_at, :started_at, :finished_at, :error_at, :failed_at
def initialize(workflow, id, klass, *args, before: [], after: [],
enqueued_at: nil, started_at: nil,
finished_at: nil, error_at: nil, failed_at: nil,
errors: [])
@workflow = workflow
@id = id
@klass = klass
@before = before
@after = after
@args = args
@enqueued_at = enqueued_at
@started_at = started_at
@finished_at = finished_at
@error_at = error_at
@failed_at = failed_at
@errors = errors
end
%i[enqueued started finished error failed].each do |state|
define_method("#{state}?") { !self.send("#{state}_at").nil? }
end
def pending?
self.enqueued? && !(self.finished? || self.failed?)
end
def enqueueable?
self.enqueued_at.nil? && self.after.all? { |j| Sidekiq::Workflow::Client.instance.load_job(j).finished? }
end
TERMINAL_STATES = %i[finished failed].freeze
def status
return :failed if self.failed?
return :error if self.error?
return :finished if self.finished?
return :started if self.started?
return :enqueued if self.enqueued?
:pending
end
%i[before after].each do |dep|
define_method("have_#{dep}?") { !self.instance_variable_get(:"@#{dep}").empty? }
define_method("include_#{dep}?") { |id| self.instance_variable_get(:"@#{dep}").include? id }
end
def initial_job?
!self.have_after?
end
def self.create(workflow, *args)
self.new workflow.id, SecureRandom.uuid, *args
end
def persist!
Sidekiq::Workflow::Client.instance.persist_job self
end
def self.find(id)
Sidekiq::Workflow::Client.instance.load_job id
end
def perform
@klass.perform_async self.id, *@args
end
end

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lib/sidekiq/workflow/worker.rb
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module Sidekiq::Workflow::Worker
module InstanceMethods
def perform(id, *args, **kwargs)
@job = Sidekiq::Workflow::Job.find id
@workflow = @job.workflow
@job.started_at ||= Time.now
result, exception = nil, nil
begin
result = super *args, **kwargs
@job.error_at = nil
@job.finished_at = Time.now
rescue => e
exception = e
now = Time.now
@job.errors << { date: now, error: e.to_s }
@job.error_at = now
end
@job.persist!
self.perform_ready_jobs! unless exception
raise exception if exception
result
end
private
def perform_ready_jobs!
key = "workflow::lock::#{@workflow}"
Sidekiq::Workflow::Client.instance.lock key, 2000 do
@job.before.each do |job|
job = Sidekiq::Workflow::Client.instance.load_job job
job.perform if job.enqueueable?
end
end
end
def set_payload(value, name = nil)
name ||= @job.klass
Sidekiq::Workflow::Client.instance.set_payload @workflow, name, value
end
def get_payload(name = nil, type = :string)
name ||= @job.klass
Sidekiq::Workflow::Client.instance.get_payload @workflow, name, type
end
end
module ClassMethods
def perform_async(id, *args, **kwargs)
@job = Sidekiq::Workflow::Job.find id
@job.enqueued_at = Time.now
@job.persist!
super id, *args, **kwargs
end
end
def self.included(base)
base.include Sidekiq::Worker
base.prepend InstanceMethods
base.singleton_class.prepend ClassMethods
base.sidekiq_retries_exhausted do |msg, _|
id = msg['args'].first
@job = Sidekiq::Workflow::Job.find id
@job.failed_at = Time.now
@job.persist!
end
end
end

19
sidekiq-workflow.gemspec
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Gem::Specification.new do |spec|
spec.name = 'sidekiq-workflow'
spec.version = '0.0.0'
spec.summary = 'Parallel workflow engine based on Sidekiq & Redis'
spec.description = 'Parallel workflow engine based on Sidekiq & Redis'
spec.authors = ['aeris']
spec.email = ['aeris@cozycloud.cc']
spec.files = %w(README.md LICENSE) + Dir.glob('lib/**/*', base: __dir__)
spec.executables = Dir.glob('bin/**/*', base: File.join(__dir__, spec.bindir))
spec.test_files = Dir.glob('spec/**/*', base: __dir__)
spec.homepage = 'https://rubygems.org/gems/sidekiq-workflow'
spec.license = 'AGPL-3.0+'
spec.add_dependency 'sidekiq', '~> 6.2', '>= 6.2.1'
spec.add_dependency 'redis', '~> 4.3', '>= 4.3.1'
spec.add_dependency 'redlock', '~> 1.2', '>= 1.2.1'
spec.add_development_dependency 'rspec', '~> 3.10', '>= 3.10.0'
end

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spec/job_spec.rb
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RSpec.describe Sidekiq::Workflow::Job do
before(:each) do
Sidekiq::Worker.clear_all
end
it 'must allow sidekiq configuration per job' do
class TestJob1
include Sidekiq::Workflow::Worker
sidekiq_options queue: :test_1, retry: 1
sidekiq_retry_in { 10 }
def perform(...) end
end
class TestJob2
include Sidekiq::Workflow::Worker
sidekiq_options queue: :test_2, retry: 2
sidekiq_retry_in { 20 }
def perform(...) end
end
class TestWorkflow < Sidekiq::Workflow
def configure
job TestJob1
job TestJob2
end
end
TestWorkflow.start!
expect(TestJob1.jobs.size).to eq 1
job1 = TestJob1.jobs.first
expect(job1).to include 'retry' => 1, 'queue' => 'test_1'
queue1 = Sidekiq::Queues['test_1']
expect(queue1.size).to eq 1
job1 = queue1.first
expect(job1).to include 'class' => 'TestJob1'
expect(TestJob2.jobs.size).to eq 1
job2 = TestJob2.jobs.first
expect(job2).to include 'retry' => 2, 'queue' => 'test_2'
queue2 = Sidekiq::Queues['test_2']
expect(queue2.size).to eq 1
job2 = queue2.first
expect(job2).to include 'class' => 'TestJob2'
end
describe '#status' do
it 'must have the correct state given timestamp' do
job = described_class.create OpenStruct.new(id: ''), Class
expect(job.status).to eq :pending
job.enqueued_at = Time.now
expect(job.status).to eq :enqueued
job.started_at = Time.now
expect(job.status).to eq :started
job.finished_at = Time.now
expect(job.status).to eq :finished
job.error_at = Time.now
expect(job.status).to eq :error
job.failed_at = Time.now
expect(job.status).to eq :failed
end
end
end

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spec/spec_helper.rb
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require 'sidekiq/workflow'
require 'pry-byebug'
redis_url = ENV.fetch 'REDIS_URL', 'redis://localhost/'
Sidekiq::Workflow.configure url: redis_url
require 'sidekiq/testing'
Sidekiq::Testing.fake!
# This file was generated by the `rspec --init` command. Conventionally, all
# specs live under a `spec` directory, which RSpec adds to the `$LOAD_PATH`.
# The generated `.rspec` file contains `--require spec_helper` which will cause
# this file to always be loaded, without a need to explicitly require it in any
# files.
#
# Given that it is always loaded, you are encouraged to keep this file as
# light-weight as possible. Requiring heavyweight dependencies from this file
# will add to the boot time of your test suite on EVERY test run, even for an
# individual file that may not need all of that loaded. Instead, consider making
# a separate helper file that requires the additional dependencies and performs
# the additional setup, and require it from the spec files that actually need
# it.
#
# See http://rubydoc.info/gems/rspec-core/RSpec/Core/Configuration
RSpec.configure do |config|
# rspec-expectations config goes here. You can use an alternate
# assertion/expectation library such as wrong or the stdlib/minitest
# assertions if you prefer.
config.expect_with :rspec do |expectations|
# This option will default to `true` in RSpec 4. It makes the `description`
# and `failure_message` of custom matchers include text for helper methods
# defined using `chain`, e.g.:
# be_bigger_than(2).and_smaller_than(4).description
# # => "be bigger than 2 and smaller than 4"
# ...rather than:
# # => "be bigger than 2"
expectations.include_chain_clauses_in_custom_matcher_descriptions = true
end
# rspec-mocks config goes here. You can use an alternate test double
# library (such as bogus or mocha) by changing the `mock_with` option here.
config.mock_with :rspec do |mocks|
# Prevents you from mocking or stubbing a method that does not exist on
# a real object. This is generally recommended, and will default to
# `true` in RSpec 4.
mocks.verify_partial_doubles = true
end
# This option will default to `:apply_to_host_groups` in RSpec 4 (and will
# have no way to turn it off -- the option exists only for backwards
# compatibility in RSpec 3). It causes shared context metadata to be
# inherited by the metadata hash of host groups and examples, rather than
# triggering implicit auto-inclusion in groups with matching metadata.
config.shared_context_metadata_behavior = :apply_to_host_groups
# The settings below are suggested to provide a good initial experience
# with RSpec, but feel free to customize to your heart's content.
=begin
# This allows you to limit a spec run to individual examples or groups
# you care about by tagging them with `:focus` metadata. When nothing
# is tagged with `:focus`, all examples get run. RSpec also provides
# aliases for `it`, `describe`, and `context` that include `:focus`
# metadata: `fit`, `fdescribe` and `fcontext`, respectively.
config.filter_run_when_matching :focus
# Allows RSpec to persist some state between runs in order to support
# the `--only-failures` and `--next-failure` CLI options. We recommend
# you configure your source control system to ignore this file.
config.example_status_persistence_file_path = "spec/examples.txt"
# Limits the available syntax to the non-monkey patched syntax that is
# recommended. For more details, see:
# - http://rspec.info/blog/2012/06/rspecs-new-expectation-syntax/
# - http://www.teaisaweso.me/blog/2013/05/27/rspecs-new-message-expectation-syntax/
# - http://rspec.info/blog/2014/05/notable-changes-in-rspec-3/#zero-monkey-patching-mode
config.disable_monkey_patching!
# This setting enables warnings. It's recommended, but in some cases may
# be too noisy due to issues in dependencies.
config.warnings = true
# Many RSpec users commonly either run the entire suite or an individual
# file, and it's useful to allow more verbose output when running an
# individual spec file.
if config.files_to_run.one?
# Use the documentation formatter for detailed output,
# unless a formatter has already been configured
# (e.g. via a command-line flag).
config.default_formatter = "doc"
end
# Print the 10 slowest examples and example groups at the
# end of the spec run, to help surface which specs are running
# particularly slow.
config.profile_examples = 10
# Run specs in random order to surface order dependencies. If you find an
# order dependency and want to debug it, you can fix the order by providing
# the seed, which is printed after each run.
# --seed 1234
config.order = :random
# Seed global randomization in this process using the `--seed` CLI option.
# Setting this allows you to use `--seed` to deterministically reproduce
# test failures related to randomization by passing the same `--seed` value
# as the one that triggered the failure.
Kernel.srand config.seed
=end
end

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spec/workflow_spec.rb
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RSpec.describe Sidekiq::Workflow do
class TestJob
include Sidekiq::Workflow::Worker
def perform(...) end
end
class TestJob1 < TestJob; end
class TestJob2 < TestJob; end
class TestJob3 < TestJob; end
before(:each) do
Sidekiq::Worker.clear_all
end
it 'must handle after job' do
class TestWorkflow < Sidekiq::Workflow
def configure
job1 = job TestJob1
job TestJob2, after: job1
end
end
TestWorkflow.start!
expect(TestJob1.jobs.size).to eq 1
expect(TestJob2.jobs).to be_empty
TestJob1.perform_one
expect(TestJob1.jobs).to be_empty
expect(TestJob2.jobs.size).to eq 1
end
it 'must handle before job' do
class TestWorkflow < Sidekiq::Workflow
def configure
job2 = job TestJob2
job TestJob1, before: job2
end
end
TestWorkflow.start!
expect(TestJob1.jobs.size).to eq 1
expect(TestJob2.jobs).to be_empty
TestJob1.perform_one
expect(TestJob1.jobs).to be_empty
expect(TestJob2.jobs.size).to eq 1
end
it 'must starts all initial jobs if any' do
class TestWorkflow < Sidekiq::Workflow
def configure
job TestJob1
job TestJob2
end
end
TestWorkflow.start!
expect(TestJob1.jobs.size).to eq 1
expect(TestJob2.jobs.size).to eq 1
end
it 'must starts all subsequent jobs if any' do
class TestWorkflow < Sidekiq::Workflow
def configure
job1 = job TestJob1
job TestJob2, after: job1
job TestJob3, after: job1
end
end
TestWorkflow.start!
expect(TestJob1.jobs.size).to eq 1
expect(TestJob2.jobs).to be_empty
expect(TestJob3.jobs).to be_empty
TestJob1.perform_one
expect(TestJob1.jobs).to be_empty
expect(TestJob2.jobs.size).to eq 1
expect(TestJob3.jobs.size).to eq 1
end
it 'must not start subsequent jobs if all not done' do
class TestWorkflow < Sidekiq::Workflow
def configure
job1 = job TestJob1
job2 = job TestJob2
job TestJob3, after: [job1, job2]
end
end
TestWorkflow.start!
expect(TestJob1.jobs.size).to eq 1
expect(TestJob2.jobs.size).to eq 1
expect(TestJob3.jobs).to be_empty
TestJob1.perform_one
expect(TestJob1.jobs).to be_empty
expect(TestJob2.jobs.size).to eq 1
expect(TestJob3.jobs).to be_empty
TestJob2.perform_one
expect(TestJob1.jobs).to be_empty
expect(TestJob2.jobs).to be_empty
expect(TestJob3.jobs.size).to eq 1
end
end
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