jdellitt

jdellitt

Is it possible to pause a Workflow then continue it at a later time? For example, we’d like to start a Workflow with several Jobs, but want to put it into a suspended/paused state until some external event occurs (like a webhook), which would satisfy the dependency and resume the rest of the workflow. Been looking through the docs, and haven’t seen anything, so just wanting to rule out whether or not it’s possible. Thanks!

Showing Posts 1 to 6

cevado

cevado

Doesn’t appeding jobs to a workflow solve your issue?

You can create a workflow with all the jobs that doesn’t rely on the webhook.
When the webhook happens, you can append the jobs that depend on the webhook and include their dependency on other jobs.
This way you never need to worry about the “state” of the jobs in that workflow, Oban takes care of the dependencies after you append the new jobs.

jdellitt

jdellitt OP

Thanks @cevado, I do think that could work, but I was hoping to be able to define the whole Workflow up front (in a single place) as opposed to having that logic in two different places.

It seems like we may need to have a job in the middle that essentially checks for a condition and snoozes itself itself if that condition hasn’t been fulfilled.

cevado

cevado

you can make the code that append the jobs as a public function in the workflow module. this way you keep all the data about the workflow in the workflow module without needing to create a job that starves the queue/workers without a good reason.
you could even use the meta option of a job to add some internal identifiers that makes it easier to find the workflow when the webhook happens.

bkilshaw

bkilshaw

@jdellitt Did you ever figure this out by any chance?

jdellitt

jdellitt OP

No, unfortunately. I think we ended up going in a different direction altogether.

sorentwo

sorentwo

Oban Core Team

As alluded earlier in this thread, the way we usually suggest doing this is to have the job you’d like to pause snooze itself in a loop, with a limit to prevent unbounded retries. Here’s an example:

defmodule MyApp.PausedWorker do
  use Oban.Pro.Worker

  @impl Oban.Pro.Worker
  def process(job) do
    if some_external_event(job.args) do
      # do something here
    else
      {:snooze, 60}
    end
  end
end

You can optionally use unique and replace to upsert the snoozing job to run immediately, but it requires carefully setting the workflow_id:

  use Oban.Pro.Worker,
    unique: [meta: [:workflow_id, :name]],
    replace: [scheduled: [:scheduled_at]]

This question comes up rather frequently though, and a proper Oban.Pro.Workflow.pause/1 and Oban.Pro.Workflow.resume/1 seem warranted :thinking:

— All posts loaded —

Where Next? Top

Trending in Questions Top

stjefim
Hello! Suppose you are building workflow (order / task / payment) processing system with the following requirements: Each workflow con...
New
itzmidinesh
Hi all, I’m working on a Phoenix project where I need to make external HTTP requests and I’m trying to choose between Req and HTTPoison....
New
pragdave
How do I tell Hologram not to escape HTML when substituting into templates? {Textile.render(@product.long_description)} escapes the HTM...
New
leoschweizer
Hi, we run different LLM models across a cluster, with each node loading a configurable subset. Model-specific queues let nodes consume ...
New
rlipscombe
I’d like to create a file with 600 permissions (rw-------), but there’s a race condition if I create it and then change the permissions. ...
New
saleyn
Is there a way to import record definitions in the iex shell for pretty printing (similar to the rr command in the erl shell)? This woul...
New
rlipscombe
When I use Mix.install with a git dependency, using git@github.com:... how do I change the SSH identity used? I’ve got two Github accoun...
New

Other Trending Topics Top

dominicletz
Hey there, I haven’t seen a list of useful Elixir specific skills for the popular AI tools yet so I’m starting one here with my first. ...
New
raa-ziq
Hi everyone :waving_hand: I wanted to share something I’ve been building — NowBlind, a random chat app designed to help people discover ...
New
mudasobwa
I fully migrated to my own harness from Anthropic/Gemini and I think it’s time to share it. Welcome DSH, the DeepSeek Harness, fully writ...
New
KristerV
Hey. Is there anyone here who creates agents in their apps? Not talking about using agents, but creating them. I’m finding it pretty diff...
New
OndrejValenta
(I just needed to vent somewhere and LinkedIn is full of hope, or hype, I’m not sure which exactly) AI dream has many faces, but general...
New
kip
Localize is the next generation localisation library for Elixir. Think of it as ex_cldr version 3.0. The first version will be released ...
New

We're in Beta

About us Mission Statement

Options

Thread Display Mode




Thread Preview

Skip Thread Previews