Concurrent Data Processing in Elixir

Introducing DynamicSupervisor

DynamicSupervisor is another ready-to-use supervisor available to you. It can start any GenServer process on demand. Let’s add it to the supervision tree:

jobber/lib/jobber/application.ex

def start(_type, _args) do
  children = [
    {DynamicSupervisor, strategy: :one_for_one, name: Jobber.JobRunner},
  ]

  opts = [strategy: :one_for_one, name: Jobber.Supervisor]
  Supervisor.start_link(children, opts)
end

The strategy setting is required, and the only strategy that is currently accepted is :one_for_one. We will talk about supervisor strategies later in this chapter, so don’t worry about this for now.

Module-Based DynamicSupervisor
	You can also define a DynamicSupervisor module, like we do later ...