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# frozen_string_literal: true
module ActiveJob
# == Active Job adapters
#
# Active Job has adapters for the following queueing backends:
#
# * {Backburner}[https://github.com/nesquena/backburner]
# * {Delayed Job}[https://github.com/collectiveidea/delayed_job]
# * {Que}[https://github.com/chanks/que]
# * {queue_classic}[https://github.com/QueueClassic/queue_classic]
# * {Resque}[https://github.com/resque/resque]
# * {Sidekiq}[http://sidekiq.org]
# * {Sneakers}[https://github.com/jondot/sneakers]
# * {Sucker Punch}[https://github.com/brandonhilkert/sucker_punch]
# * {Active Job Async Job}[http://api.rubyonrails.org/classes/ActiveJob/QueueAdapters/AsyncAdapter.html]
# * {Active Job Inline}[http://api.rubyonrails.org/classes/ActiveJob/QueueAdapters/InlineAdapter.html]
# * Please Note: We are not accepting pull requests for new adapters. See the {README}[link:files/activejob/README_md.html] for more details.
#
# === Backends Features
#
# | | Async | Queues | Delayed | Priorities | Timeout | Retries |
# |-------------------|-------|--------|------------|------------|---------|---------|
# | Backburner | Yes | Yes | Yes | Yes | Job | Global |
# | Delayed Job | Yes | Yes | Yes | Job | Global | Global |
# | Que | Yes | Yes | Yes | Job | No | Job |
# | queue_classic | Yes | Yes | Yes* | No | No | No |
# | Resque | Yes | Yes | Yes (Gem) | Queue | Global | Yes |
# | Sidekiq | Yes | Yes | Yes | Queue | No | Job |
# | Sneakers | Yes | Yes | No | Queue | Queue | No |
# | Sucker Punch | Yes | Yes | Yes | No | No | No |
# | Active Job Async | Yes | Yes | Yes | No | No | No |
# | Active Job Inline | No | Yes | N/A | N/A | N/A | N/A |
#
# ==== Async
#
# Yes: The Queue Adapter has the ability to run the job in a non-blocking manner.
# It either runs on a separate or forked process, or on a different thread.
#
# No: The job is run in the same process.
#
# ==== Queues
#
# Yes: Jobs may set which queue they are run in with queue_as or by using the set
# method.
#
# ==== Delayed
#
# Yes: The adapter will run the job in the future through perform_later.
#
# (Gem): An additional gem is required to use perform_later with this adapter.
#
# No: The adapter will run jobs at the next opportunity and cannot use perform_later.
#
# N/A: The adapter does not support queueing.
#
# NOTE:
# queue_classic supports job scheduling since version 3.1.
# For older versions you can use the queue_classic-later gem.
#
# ==== Priorities
#
# The order in which jobs are processed can be configured differently depending
# on the adapter.
#
# Job: Any class inheriting from the adapter may set the priority on the job
# object relative to other jobs.
#
# Queue: The adapter can set the priority for job queues, when setting a queue
# with Active Job this will be respected.
#
# Yes: Allows the priority to be set on the job object, at the queue level or
# as default configuration option.
#
# No: Does not allow the priority of jobs to be configured.
#
# N/A: The adapter does not support queueing, and therefore sorting them.
#
# ==== Timeout
#
# When a job will stop after the allotted time.
#
# Job: The timeout can be set for each instance of the job class.
#
# Queue: The timeout is set for all jobs on the queue.
#
# Global: The adapter is configured that all jobs have a maximum run time.
#
# N/A: This adapter does not run in a separate process, and therefore timeout
# is unsupported.
#
# ==== Retries
#
# Job: The number of retries can be set per instance of the job class.
#
# Yes: The Number of retries can be configured globally, for each instance or
# on the queue. This adapter may also present failed instances of the job class
# that can be restarted.
#
# Global: The adapter has a global number of retries.
#
# N/A: The adapter does not run in a separate process, and therefore doesn't
# support retries.
#
# === Async and Inline Queue Adapters
#
# Active Job has two built-in queue adapters intended for development and
# testing: +:async+ and +:inline+.
module QueueAdapters
extend ActiveSupport::Autoload
autoload :AsyncAdapter
autoload :InlineAdapter
autoload :BackburnerAdapter
autoload :DelayedJobAdapter
autoload :QueAdapter
autoload :QueueClassicAdapter
autoload :ResqueAdapter
autoload :SidekiqAdapter
autoload :SneakersAdapter
autoload :SuckerPunchAdapter
autoload :TestAdapter
ADAPTER = "Adapter".freeze
private_constant :ADAPTER
class << self
# Returns adapter for specified name.
#
# ActiveJob::QueueAdapters.lookup(:sidekiq)
# # => ActiveJob::QueueAdapters::SidekiqAdapter
def lookup(name)
const_get(name.to_s.camelize << ADAPTER)
end
end
end
end