Shutdown idle aggregate processes.

[astery]

I propose implementing the following behavior to manage aggregate lifetime. The main intention was that aggregate life controller should be separated entity from domain logic.

defmodule ShopLifespan do
  @behaviour Commanded.Aggregates.AggregateLifespan

  # It specifies how long aggregate should live after processing command
  # @callback after_command(command) :: integer() | :infinity | :hibernate
  def after_command(%StartShopWork{}), do: 3600 * 1000 * 8
  def after_command(%StopShopWork{}), do: :hibernate
  def after_command(%CloseShop{}), do: 0
end

It should be specified in router:

defmodule CommandRouter do
  use Commanded.Commands.Router

  dispatch [
     StartShopWork,
     StopShopWork,
     CloseShop,
  ], to: MyAggregate, lifespan: MyAggregateLifespan, identity: :aggregate_id
end

[slashdotdash]

@astery This looks like a great change, thanks for taking the time to implement #43.

[astery]

I'm glad to hear that, thanks.