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Apr 21st, 2017
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  1. case class User()
  2. case class Book()
  3.  
  4. trait UserRepository {
  5. def getResource(): User
  6. }
  7.  
  8. trait UserRepositoryComponent {
  9. def userRepository: UserRepository
  10. }
  11.  
  12. trait BookRepository {
  13. def getResource(): Book
  14. }
  15.  
  16. trait BookRepositoryComponent {
  17. def bookRepository: BookRepository
  18. }
  19.  
  20. trait DbUserRepositoryComponent extends UserRepositoryComponent {
  21. val db: DB
  22. override def userRepository = new UserRepository {
  23. overrride def getResource(): User = {
  24. db.run()
  25. User()
  26. }
  27. }
  28. }
  29.  
  30. trait DbBookRepositoryComponent extends BookRepositoryComponent {
  31. val db: DB
  32. override val bookRepository = new BookRepository {
  33. overrride def getResource(): Book = {
  34. db.run()
  35. Book()
  36. }
  37. }
  38. }
  39.  
  40. // trait Service extends UserRepository with BookRepository { => Service IS A UserRepository
  41. trait Service {
  42. self: UserRepositoryComponent with BookRepositoryComponent => // UserService REQUIRES some Impl of UserRepository
  43.  
  44. def foo(): Unit = {
  45. userRepository.getResource()
  46. bookRepository.getResource()
  47. }
  48. }
  49.  
  50.  
  51. class ServiceImplA extends DbUserRepository with DbBookRepository
  52. class ServiceImplB extends MockUserRepository with MockBookRepository
  53. class ServiceImplC extends FileUserRepository with FileBookRepository
  54. class ServiceImplD extends DbUserRepository with FileBookRepository
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