Monthly Downloads: 3,842
Programming language: Elixir
License: MIT License
Tags: Queue    
Latest version: v1.4.5

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Honeydew ๐Ÿ’ช๐Ÿป๐Ÿˆ

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Honeydew ("Honey, do!") is a pluggable job queue and worker pool for Elixir, focused on at-least-once execution.

defmodule MyWorker do
  def do_a_thing do
    IO.puts "doing a thing!"

:ok = Honeydew.start_queue(:my_queue)
:ok = Honeydew.start_workers(:my_queue, MyWorker)

:do_a_thing |> Honeydew.async(:my_queue)

# => "doing a thing!"


  • Jobs are run in isolated one-time-use processes.
  • Optionally stores immutable state loaned to each worker (a database connection, for example).
  • Initialized Worker

Strong Job Custody

  • Jobs don't leave the queue until either they succeed, are explicitly abandoned or are moved to another queue.
  • Workers are issued only one job at a time, no batching.
  • If a worker crashes while processing a job, the job is reset and a "failure mode" (e.g. abandon, move, retry) is executed. (The default failure mode is to abandon the job.)
  • Job Lifecycle

Clusterable Components

  • Queues, workers and your enqueuing processes can exist anywhere in the BEAM cluster.
  • Global Queues


Batteries Included

Easy API

Ecto Queue

The Ecto Queue is designed to painlessly turn your Ecto schema into a queue, using your repo as the backing store.

  • You don't need to explicitly enqueue jobs, that's handled for you (for example, sending a welcome email when a new User is inserted).
  • Eliminates the possibility of your database and work queue becoming out of sync
  • As the database is the queue, you don't need to run a separate queue node.
  • You get all of the high-availability, consistency and distribution semantics of your chosen database.

Check out the included example project, and its README.

Getting Started

In your mix.exs file:

defp deps do
  [{:honeydew, "~> 1.5.0"}]


If you're using the Mnesia queue (the default), you'll need tell your release system to include the :mnesia application, and you'll have to decide how you're going to create your on-disk schema files, which needs to be done while mnesia is not running.

If you use mnesia outside of Honeydew, you'll want to use the :extra_applications configuration key in your mix.exs file, as well as manually creating your mnesia schema with :mnesia.create_schema(nodes) in an iex session in production:

def application do
    extra_applications: [:mnesia]

Otherwise, if Honeydew is the only user of mnesia, you can let Honeydew manage it by simply using the :included_applications key instead.

def application do
    included_applications: [:mnesia]


  • Check out the examples.
  • Enqueue jobs with Honeydew.async/3, delay jobs by passing delay_secs: <integer>.
  • Receive responses with Honeydew.yield/2.
  • Emit job progress with progress/1
  • Queue/Worker status with Honeydew.status/1
  • Suspend and resume with Honeydew.suspend/1 and Honeydew.resume/1
  • List jobs with Honeydew.filter/2
  • Move jobs with Honeydew.move/2
  • Cancel jobs with Honeydew.cancel/2


The rest of the README is broken out into slightly more digestible sections.

Also, check out the README files included with each of the examples.


It's worth keeping abreast with the CHANGELOG