Introducing Wire: Dependency Injection by Code Generator

Transcript

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4. %*
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6. package json func NewDecoder(r io.Reader) *Decoder { return &Decoder{r: r} }
7. io.Reader json.Decoder
8. Bookshelf Service BookRepository BookOwnership Repository Notification Repository Inbox Service UserRepository API Server Job A Job B Datastore Client
9. func main() { ctx := context.Background() client, err := datastore.NewClient(ctx, "my-project") if err != nil { log.Fatal(err) } defer client.Close() bookRepository := NewBookRepository(client) bookOwnershipRepository := NewBookOwnershipRepository(client) userRepository := NewUserRepository(client) notificationRepository := NewNotificationRepository(client) bookshelfService := NewBookshelfService(bookRepository, bookOwnershipRepository, inboxService := NewInboxService(userRepository, notificationRepository) server := NewAPIServer(bookshelfService, inboxService) server.Listen() }
10. Shopping Service BookRepository BookOwnership Repository Notification Repository Inbox Service UserRepository Admin Server Job A Job B PubSub Client Bookshelf Service BookRepository BookOwnership Repository Notification Repository Inbox Service UserRepository API Server Job A Job B Datastore Client Bookshelf Service BookRepository BookOwnership Repository Notification Repository Inbox Service UserRepository API Server Job A Job B Datastore Client Bookshelf Service BookRepository BookOwnership Repository Notification Repository Inbox Service UserRepository API Server Job A Job B Datastore Client Bookshelf Service BookRepository BookOwnership Repository Notification Repository Inbox Service UserRepository API Server Job A Job B Datastore Client Bookshelf Service BookRepository BookOwnership Repository Notification Repository Inbox Service UserRepository API Server Job A Job B Datastore Client Bookshelf Service BookRepository BookOwnership Repository Notification Repository Inbox Service UserRepository API Server Job A Job B Datastore Client Recommend Service BookRepository BookOwnership Repository Notification Repository Inbox Service UserRepository Job C Job D Functions Client Bookshelf Service BookRepository BookOwnership Repository Notification Repository Inbox Service UserRepository API Server Job A Job B Datastore Client Bookshelf Service BookRepository BookOwnership Repository Notification Repository Inbox Service UserRepository API Server Job A Job B Datastore Client Bookshelf Service BookRepository BookOwnership Repository ReadHistory Repository History Service UserRepository API Server Job A Job B Datastore Client
11. notificationRepository := NewNotificationRepository() bookshelfService := NewBookshelfService( bookRepository, bookOwnershipRepository, userRepository) inboxService := NewInboxService( userRepository, notificationRepository) bookRepository := NewBookRepository() bookOwnershipRepository := NewBookOwnershipRepository() userRepository := NewUserRepository() notificationRepository := NewNotificationRepository() bookshelfService := NewBookshelfService( bookRepository, bookOwnershipRepository, userRepository) inboxService := NewInboxService( userRepository, notificationRepository) bookRepository := NewBookRepository() bookOwnershipRepository := NewBookOwnershipRepository() userRepository := NewUserRepository() notificationRepository := NewNotificationRepository() bookshelfService := NewBookshelfService( bookRepository, bookOwnershipRepository, userRepository) inboxService := NewInboxService( userRepository, notificationRepository) bookRepository := NewBookRepository() bookOwnershipRepository := NewBookOwnershipRepository() userRepository := NewUserRepository() notificationRepository := NewNotificationRepository() bookshelfService := NewBookshelfService( bookRepository, bookOwnershipRepository, userRepository) inboxService := NewInboxService( userRepository, notificationRepository) bookRepository := NewBookRepository() bookOwnershipRepository := NewBookOwnershipRepository() userRepository := NewUserRepository() notificationRepository := NewNotificationRepository() bookshelfService := NewBookshelfService( bookRepository, bookOwnershipRepository, userRepository) inboxService := NewInboxService( userRepository, notificationRepository) bookRepository := NewBookRepository() bookOwnershipRepository := NewBookOwnershipRepository() userRepository := NewUserRepository() notificationRepository := NewNotificationRepository() bookshelfService := NewBookshelfService( bookRepository, bookOwnershipRepository, userRepository) inboxService := NewInboxService( userRepository, notificationRepository) bookRepository := NewBookRepository() bookOwnershipRepository := NewBookOwnershipRepository() userRepository := NewUserRepository() notificationRepository := NewNotificationRepository() bookshelfService := NewBookshelfService( bookRepository, bookOwnershipRepository, userRepository) inboxService := NewInboxService(
13. 8JSF
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16. %*ʹඞཁͳίʔυ ຊ࣭ ࣗ໌
17. %*ʹඞཁͳίʔυ ͜͜Λࣗಈੜ੒ ຊ࣭ ࣗ໌
18. ຊ࣭ͱ͸
19. w ͲͷΑ͏ͳґଘ͕͋Δͷ͔
    w Ͳ͏΍ͬͯґଘΛऔಘ͢Δͷ͔
20. w 1SPWJEFS
    w *OKFDUPS
21. 1SPWJEFS
22. func NewBookRepository(client *datastore.Client) BookRepository { ... }
23. Bookshelf Service BookRepository BookOwnership Repository Notification Repository Inbox Service UserRepository API Server Job A Job B Datastore Client 1SPWJEFS
24. Bookshelf Service BookRepository BookOwnership Repository Notification Repository Inbox Service UserRepository API Server Job A Job B Datastore Client 1SPWJEFS
25. Bookshelf Service BookRepository BookOwnership Repository Notification Repository Inbox Service UserRepository API Server Job A Job B Datastore Client 1SPWJEFS
26. Bookshelf Service BookRepository BookOwnership Repository Notification Repository Inbox Service UserRepository API Server Job A Job B Datastore Client 1SPWJEFS
27. *OKFDUPS
28. // +build wireinject ... func InitializeServer( ctx context.Context, projectID ProjectID) (server *Server, cleanup func(), err error) { wire.Build( ProvideDatastoreClient, NewBookRepository, NewBookOwnershipRepository, NewUserRepository, NewNotificationRepository, NewBookshelfService, NewInboxService, NewAPIServer) return }
29. $ wire ./...
30. //+build !wireinject ... func InitializeServer( ctx context.Context, projectID ProjectID) (*Server, func(), error) { client, cleanup, err := ProvideDatastoreClient(ctx, projectID) if err != nil { return nil, nil, err } bookRepository := NewBookRepository(client) bookOwnershipRepository := NewBookOwnershipRepository(client) userRepository := NewUserRepository(client) notificationRepository := NewNotificationRepository(client) bookshelfService := NewBookshelfService(bookRepository, bookOwnershipRepository, inboxService := NewInboxService(userRepository, notificationRepository) server := NewAPIServer(bookshelfService, inboxService) return server, func() { cleanup() }, nil }
31. //+build !wireinject ... func InitializeServer( ctx context.Context, projectID ProjectID) (*Server, func(), error) { client, cleanup, err := ProvideDatastoreClient(ctx, projectID) if err != nil { return nil, nil, err } bookRepository := NewBookRepository(client) bookOwnershipRepository := NewBookOwnershipRepository(client) userRepository := NewUserRepository(client) notificationRepository := NewNotificationRepository(client) bookshelfService := NewBookshelfService(bookRepository, bookOwnershipRepository, inboxService := NewInboxService(userRepository, notificationRepository) server := NewAPIServer(bookshelfService, inboxService) return server, func() { cleanup() }, nil } ैདྷखॻ͖͍ͯͨ͠
    ίʔυ͕ࣗಈੜ੒͞Εͨ
33. ࣮͸͜ΕΒ΋ࣗಈੜ੒Ͱ͖Δ w ύϥϝʔλʔͷड͚౉͠
    w Τϥʔॲཧ
    w ΫϦʔϯΞοϓॲཧ
34. ָͳ͚ͩͰ͸ͳ͍
35. ίʔυੜ੒ʹΑΔґଘؔ܎ͷղܾͳͷͰ
    άϥϑͷܽଛΛίϯύΠϧ࣌ʹൃݟͰ͖Δ
36. ·ͱΊ
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    w ґଘؔ܎͸ίϯύΠϧ࣌ʹղܾ͞ΕΔͷͰ҆શ
38. IUUQTHJUIVCDPNHPPHMFXJSF