Example for Blog Post "Hexagonal Architecture: Structuring a project and the influence of granularity"

driver_ports.go

# the coarse-grained version

type ForSelectingDecks interface {
  Select(command SelectDeckCommand) error
  Unselect(command UnselectDeckCommand) error
}

# the fine-grained version

type ForSelectingDecks interface {
  Select(command SelectDeckCommand) error
}

type ForUnselectingDecks interface {
  Unselect(command UnselectDeckCommand) error
}