Defines a Commanded application.

The application expects at least an :otp_app option to be specified. It should point to an OTP application that has the application configuration.

For example, the application:

defmodule MyApp.Application do
  use Commanded.Application, otp_app: :my_app

  router(MyApp.Router)
end

Could be configured with:

# config/config.exs
config :my_app, MyApp.Application
  event_store: [
    adapter: Commanded.EventStore.Adapters.EventStore,
    event_store: MyApp.EventStore
  ],
  pubsub: :local,
  registry: :local

Alternatively, you can include the event store, pubsub, and registry config when defining the application:

defmodule MyApp.Application do
  use Commanded.Application,
    otp_app: :my_app,
    event_store: [
      adapter: Commanded.EventStore.Adapters.EventStore,
      event_store: MyApp.EventStore
    ],
    pubsub: :local,
    registry: :local

  router(MyApp.Router)
end