class ActiveJob::QueueAdapters::AsyncAdapter
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.
Public class methods
new(**executor_options)
See Concurrent::ThreadPoolExecutor for executor options.
Source code GitHub
# File activejob/lib/active_job/queue_adapters/async_adapter.rb, line 35
def initialize(**executor_options)
@scheduler = Scheduler.new(**executor_options)
end