workers.md

Workers

Workers can be completely stateless, or initialized with state by implementing the init/1 callback.

Worker state is immutable, the only way to change it is to cause the worker to crash and let Honeydew restart it.

Your worker module's init/1 function must return {:ok, state}. If anything else is returned or your callback raises an error, the worker will execute your failed_init/0 callback, if you've implemented it. If not, the worker will attempt to re-initialize in five seconds.

Check out the initialized worker example.

If you'd like to re-initialize the worker from within your failed_init/0 callback, you can do it like so:

defmodule FailedInitWorker do
  def init(_) do
    raise "init failed"
  end

  def failed_init do
    Honeydew.reinitialize_worker()
  end
end