silverdr
Spawn an asynchronous worker
https://dashbit.co/blog/you-may-not-need-redis-with-elixir contains a sentence: “even if you prefer to deliver emails outside of the request, in order to send an earlier response to users, you can spawn an asynchronous worker […]”. Now, is it about something as simple as:
Task.start(
fn ->
Email.important_stuff(user)
|> Mailer.deliver_now!
end
)
or did the author have something else / more sophisticated in mind? What is the typical way of “spawning an asynchronous worker” from within a request-serving process?
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stefanchrobot
Almost that, except you should start the task under a supervision tree:
children = [
{Task.Supervisor, name: MyApp.TaskSupervisor}
]
Task.Supervisor.start_child(MyApp.TaskSupervisor, fn ->
IO.puts "I am running in a task"
end)
From the docs:
Note that the spawned process is not linked to the caller, but only to the supervisor. This command is useful in case the task needs to perform side-effects (like I/O) and you have no interest on its results nor if it completes successfully.
But if you’re on PostreSQL, then consider Oban. It’s awesome.
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