A Commanded event handler to produce `:telemetry` events for each recorded event.

event_telemetry.ex

defmodule Commanded.EventTelemetry do
  @moduledoc """
  A Commanded event handler to produce `:telemetry` events for each recorded
  event.

  It produces the following event:

    - `[:commanded, :event, :published]`
    
  """

  use Commanded.Event.Handler, name: __MODULE__, start_from: :current

  def handle(event, metadata) do
    :telemetry.execute(
      [:commanded, :event, :published],
      %{timestamp: Map.get(metadata, :created_at)},
      %{event: event, metadata: metadata}
    )
  end
end