Class: ActiveJob::QueueAdapters::AsyncAdapter

Relationships & Source Files
Super Chains via Extension / Inclusion / Inheritance
Class Chain: self, `AbstractAdapter`
Instance Chain: self, `AbstractAdapter`
Inherits:	ActiveJob::QueueAdapters::AbstractAdapter `::Object` ActiveJob::QueueAdapters::AbstractAdapter ActiveJob::QueueAdapters::AsyncAdapter
Defined in:	activejob/lib/active_job/queue_adapters/async_adapter.rb

Overview

Active Job Async adapter

The Async adapter runs jobs with an in-process thread pool.

This is the default queue adapter. It’s well-suited for dev/test since it doesn’t need an external infrastructure, but it’s a poor fit for production since it drops pending jobs on restart.

To use this adapter, set queue adapter to :async:

config.active_job.queue_adapter = :async

To configure the adapter’s thread pool, instantiate the adapter and pass your own config:

config.active_job.queue_adapter = ActiveJob::QueueAdapters::AsyncAdapter.new \
  min_threads: 1,
  max_threads: 2 * Concurrent.processor_count,
  idletime: 600.seconds

The adapter uses a Concurrent Ruby thread pool to schedule and execute jobs. Since jobs share a single thread pool, long-running jobs will block short-lived jobs. Fine for dev/test; bad for production.

Class Method Summary

.new(**executor_options) ⇒ AsyncAdapter constructor

See Concurrent::ThreadPoolExecutor for executor options.

Instance Method Summary

`AbstractAdapter` - Inherited

#enqueue, #enqueue_at

Constructor Details

.new(**executor_options) ⇒ `AsyncAdapter`

See Concurrent::ThreadPoolExecutor for executor options.

[ GitHub ]

# File 'activejob/lib/active_job/queue_adapters/async_adapter.rb', line 35


def initialize(**executor_options)
  @scheduler = Scheduler.new(**executor_options)
end