Defines project-wide convention for routing Sea signals to nested observers.

Usage

For single observer:

defmodule MyApp.Sales.InvoiceCreatedSignal do
  use Sea.Signal

  emit_to MyApp.Inventory

  # ...
end

defmodule MyApp.Inventory do
  use Sea.SignalRouter, :single_observer

  # ...
end

defmodule MyApp.Inventory.Observer do
  use Sea.Observer

  # example of catching multiple signals to trigger the same operation
  def handle_signal(signal = %{__struct__: struct}) when struct in [
    MyApp.Sales.InvoiceCreatedSignal
  ] do
    MyApp.Inventory.UpdateStatsService.call()
  end
end