Initial gem structure

.rspec

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+--format documentation
+--color
+--require spec_helper

.travis.yml

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+sudo: false
+language: ruby
+rvm:
+  - 2.4.2
+before_install: gem install bundler -v 1.16.0

CODE_OF_CONDUCT.md

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+# Contributor Covenant Code of Conduct
+
+## Our Pledge
+
+In the interest of fostering an open and welcoming environment, we as
+contributors and maintainers pledge to making participation in our project and
+our community a harassment-free experience for everyone, regardless of age, body
+size, disability, ethnicity, gender identity and expression, level of experience,
+nationality, personal appearance, race, religion, or sexual identity and
+orientation.
+
+## Our Standards
+
+Examples of behavior that contributes to creating a positive environment
+include:
+
+* Using welcoming and inclusive language
+* Being respectful of differing viewpoints and experiences
+* Gracefully accepting constructive criticism
+* Focusing on what is best for the community
+* Showing empathy towards other community members
+
+Examples of unacceptable behavior by participants include:
+
+* The use of sexualized language or imagery and unwelcome sexual attention or
+advances
+* Trolling, insulting/derogatory comments, and personal or political attacks
+* Public or private harassment
+* Publishing others' private information, such as a physical or electronic
+  address, without explicit permission
+* Other conduct which could reasonably be considered inappropriate in a
+  professional setting
+
+## Our Responsibilities
+
+Project maintainers are responsible for clarifying the standards of acceptable
+behavior and are expected to take appropriate and fair corrective action in
+response to any instances of unacceptable behavior.
+
+Project maintainers have the right and responsibility to remove, edit, or
+reject comments, commits, code, wiki edits, issues, and other contributions
+that are not aligned to this Code of Conduct, or to ban temporarily or
+permanently any contributor for other behaviors that they deem inappropriate,
+threatening, offensive, or harmful.
+
+## Scope
+
+This Code of Conduct applies both within project spaces and in public spaces
+when an individual is representing the project or its community. Examples of
+representing a project or community include using an official project e-mail
+address, posting via an official social media account, or acting as an appointed
+representative at an online or offline event. Representation of a project may be
+further defined and clarified by project maintainers.
+
+## Enforcement
+
+Instances of abusive, harassing, or otherwise unacceptable behavior may be
+reported by contacting the project team at [email protected]. All
+complaints will be reviewed and investigated and will result in a response that
+is deemed necessary and appropriate to the circumstances. The project team is
+obligated to maintain confidentiality with regard to the reporter of an incident.
+Further details of specific enforcement policies may be posted separately.
+
+Project maintainers who do not follow or enforce the Code of Conduct in good
+faith may face temporary or permanent repercussions as determined by other
+members of the project's leadership.
+
+## Attribution
+
+This Code of Conduct is adapted from the [Contributor Covenant][homepage], version 1.4,
+available at [http://contributor-covenant.org/version/1/4][version]
+
+[homepage]: http://contributor-covenant.org
+[version]: http://contributor-covenant.org/version/1/4/

Gemfile

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+source "https://rubygems.org"
+
+git_source(:github) {|repo_name| "https://github.com/#{repo_name}" }
+
+# Specify your gem's dependencies in qyu-store-redis.gemspec
+gemspec

README.md

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+# Qyu::Store::Redis
+
+Welcome to your new gem! In this directory, you'll find the files you need to be able to package up your Ruby library into a gem. Put your Ruby code in the file `lib/qyu/store/redis`. To experiment with that code, run `bin/console` for an interactive prompt.
+
+TODO: Delete this and the text above, and describe your gem
+
+## Installation
+
+Add this line to your application's Gemfile:
+
+```ruby
+gem 'qyu-store-redis'
+```
+
+And then execute:
+
+    $ bundle
+
+Or install it yourself as:
+
+    $ gem install qyu-store-redis
+
+## Usage
+
+TODO: Write usage instructions here
+
+## Development
+
+After checking out the repo, run `bin/setup` to install dependencies. Then, run `rake spec` to run the tests. You can also run `bin/console` for an interactive prompt that will allow you to experiment.
+
+To install this gem onto your local machine, run `bundle exec rake install`. To release a new version, update the version number in `version.rb`, and then run `bundle exec rake release`, which will create a git tag for the version, push git commits and tags, and push the `.gem` file to [rubygems.org](https://rubygems.org).
+
+## Contributing
+
+Bug reports and pull requests are welcome on GitHub at https://github.com/FindHotel/qyu-store-redis. This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to adhere to the [Contributor Covenant](http://contributor-covenant.org) code of conduct.
+
+## License
+
+The gem is available as open source under the terms of the [MIT License](https://opensource.org/licenses/MIT).
+
+## Code of Conduct
+
+Everyone interacting in the Qyu::Store::Redis project’s codebases, issue trackers, chat rooms and mailing lists is expected to follow the [code of conduct](https://github.com/FindHotel/qyu-store-redis/blob/master/CODE_OF_CONDUCT.md).

Rakefile

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+require 'bundler/gem_tasks'
+require 'rspec/core/rake_task'
+
+RSpec::Core::RakeTask.new(:spec)
+
+task :default => :spec

bin/console

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+#!/usr/bin/env ruby
+
+require "bundler/setup"
+require "qyu"
+require "qyu/store/redis"
+
+# You can add fixtures and/or initialization code here to make experimenting
+# with your gem easier. You can also use a different console, if you like.
+
+# (If you use this, don't forget to add pry to your Gemfile!)
+# require "pry"
+# Pry.start
+
+require "pry"
+Pry.start

bin/setup

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+#!/usr/bin/env bash
+set -euo pipefail
+IFS=$'\n\t'
+set -vx
+
+bundle install
+
+# Do any other automated setup that you need to do here

lib/qyu.rb

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+module Qyu
+  class << self
+    unless defined?(logger)
+      def logger=(logger)
+        @@__logger = logger
+      end
+
+      def logger
+        @@__logger ||= Qyu::Store::Redis::Logger.new(STDOUT)
+      end
+    end
+  end
+end

lib/qyu/store/redis.rb

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+require_relative "./redis/version"
+require 'json'
+require 'redis'
+
+module Qyu
+  module Store
+    module Redis
+      autoload :Adapter,                'qyu/store/redis/adapter'
+      autoload :Logger,                 'qyu/store/redis/logger'
+
+      class << self
+        def interface
+          defined?(Qyu::Store::Base) ? Qyu::Store::Base : Object
+        end
+      end
+    end
+  end
+end

lib/qyu/store/redis/adapter.rb

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+require 'securerandom'
+
+module Qyu
+  module Store
+    module Redis
+      class Adapter < Qyu::Store::Redis.interface
+        TYPE = :redis
+
+        class << self
+          def valid_config?(config)
+            true
+          end
+        end
+
+        def initialize(config)
+          init_client(config)
+        end
+
+        def find_or_persist_task(name, queue_name, payload, job_id, parent_task_id)
+          # TODO
+        end
+
+        def persist_workflow(name, descriptor)
+          key = "workflow:#{SecureRandom.uuid}"
+          @client.hmset(key, :name, name, :descriptor, serialize { descriptor })
+          { name: name, descriptor: descriptor }
+        end
+
+        def persist_job(workflow, payload)
+          key = "job:#{SecureRandom.uuid}"
+          @client.hmset(key, :workflow, serialize { workflow }, :payload, serialize { payload })
+        end
+
+        def find_workflow(id)
+          workflow = @client.hgetall("workflow:#{id}")
+          return if workflow.eql?({})
+          workflow[:descriptor] = parse { workflow[:descriptor] }
+          workflow
+        end
+
+        def find_workflow_by_name(name)
+          # TODO should store workflow by name and scan by ID as name will be mostly used
+        end
+
+        def find_task(id)
+          task = @client.hgetall("task:#{id}")
+          return if task.eql?({})
+          task[:payload] = parse { task[:payload] }
+          task
+        end
+
+        def find_task_ids_by_job_id_and_name(job_id, name)
+          # TODO use sets
+        end
+
+        def find_task_ids_by_job_id_name_and_parent_task_ids(job_id, name, parent_task_ids)
+          # TODO use sets
+        end
+
+        def find_job(id)
+          job = @client.hgetall("job:#{id}")
+          return if job.eql?({})
+          job[:payload] = parse { job[:payload] }
+          job[:workflow] = parse { job[:workflow] }
+          job
+        end
+
+        def select_jobs(limit, offset, order = :asc)
+          # TODO jobs embedded in them their workflows
+        end
+
+        def select_tasks_by_job_id(job_id)
+          # TODO get tasks that belong to job
+        end
+
+        def count_jobs
+          @client.keys["job:*"].count
+        end
+
+        def lock_task!(id, lease_time)
+          Qyu.logger.debug '[LOCK] lock_task!'
+
+          uuid = SecureRandom.uuid
+          Qyu.logger.debug "[LOCK] uuid = #{uuid}"
+
+          locked_until = seconds_after_time(lease_time)
+          Qyu.logger.debug "[LOCK] locked_until = #{locked_until}"
+
+          key = "task:#{id}"
+          task = find_task(id)
+          # TODO raise task not found
+          response = nil
+          if task['locked_until'].eql?('') || DateTime.parse(task['locked_until']) < DateTime.now
+            response = redis.hmset(key, 'locked_by', uuid, 'locked_until', locked_until).eql?('OK')
+          end
+
+          response.eql?('OK') ? [uuid, locked_until] : [nil, nil]
+        end
+
+        def unlock_task!(id, lease_token)
+          key = "task:#{id}"
+          task = find_task(id)
+          # TODO raise task not found
+          if task['locked_by'].eql?(lease_token)
+            redis.hmset(key, 'locked_by', nil, 'locked_until', nil).eql?('OK')
+          else
+            false
+          end
+        end
+
+        def renew_lock_lease(id, lease_time, lease_token)
+          Qyu.logger.debug "renew_lock_lease id = #{id}, lease_time = #{lease_time}, lease_token = #{lease_token}"
+
+          key = "task:#{id}"
+          task = find_task(id)
+          # TODO raise task not found
+          return nil if task['locked_until'].eql?('')
+          if task['locked_by'].eql?(lease_token) && DateTime.parse(task['locked_until']) > DateTime.now
+            redis.hmset(key, 'locked_until', seconds_after_time(lease_time))
+            locked_until
+          else
+            return nil
+          end
+        end
+
+        def update_status(id, status)
+          key = "task:#{id}"
+          redis.hmset(key, 'status', status).eql?('OK')
+        end
+
+        def serialize
+          yield.to_json
+        end
+
+        def parse
+          JSON.parse(yield)
+        end
+
+        def transaction
+          # TODO
+          yield
+        end
+
+        private
+
+        def compare_payloads(payload1, payload2)
+          sort(payload1) == sort(payload2)
+        end
+
+        def sort(payload)
+          payload
+        end
+
+        def init_client(config)
+          load_config(config)
+          @client = ::Redis.new(@@redis_configuration)
+        end
+
+        def load_config(config)
+          if config[:url]
+            @@redis_configuration = { url: config[:url] }
+          else
+            @@redis_configuration = {
+              host: config[:host],
+              port: config[:port],
+              password: config[:password],
+              db: config[:db]
+            }.compact
+          end
+
+          @@redis_configuration[:ssl_params] = config[:ssl_params] if config[:ssl_params]
+          @@redis_configuration[:timeout] = config[:timeout] if config[:timeout]
+          @@redis_configuration[:connect_timeout] = config[:connect_timeout] if config[:connect_timeout]
+          @@redis_configuration[:read_timeout] = config[:read_timeout] if config[:read_timeout]
+          @@redis_configuration[:write_timeout] = config[:write_timeout] if config[:write_timeout]
+          true
+        end
+
+        def seconds_after_time(seconds, start_time = Time.now.utc)
+          start_time + seconds
+        end
+      end
+    end
+  end
+end
+
+Qyu::Config::StoreConfig.register(Qyu::Store::Redis::Adapter) if defined?(Qyu::Config::StoreConfig)
+Qyu::Factory::StoreFactory.register(Qyu::Store::Redis::Adapter) if defined?(Qyu::Factory::StoreFactory)