Server-Side Swift with Vapor

In this talk, I will briefly present the Swift language, its role in the back-end, and, more in depth, the Vapor framework.
Swift is an Open-Source language developed by Apple with speed, efficiency, friendly syntax and safety as its core values.
Vapor–pronounced /ˈveɪpə/–is an ultra modular and performatic framework for developing web apps, real-time apps, websites and APIs in Swift.

At the end I give a brief shout out to Rocket.Chat, my employer and sponsor for the event in which I gave this presentation.

Transcript

1. class Cardoso: iOSDeveloper { let name = "Matheus Cardoso" let company = "Rocket.Chat" let github = "github.com/cardoso" let email = "matheus@cardo.so" }
2. Server Side Swift
3. Who writes Swift?
4. Who writes Backend?
5. Swift 1.0 Jun 2014
6. Swift 1.0 Jun 2014 Dec 2015 Open Source
7. Swift 1.0 Jun 2014 Dec 2015 Open Source
8. Swift 1.0 Jun 2014 Dec 2015 Open Source
9. Swift 1.0 Jun 2014 Dec 2015 Open Source
10. Swift 1.0 Jun 2014 Dec 2015 Open Source Kitura Vapor Zewo Perfect
11. Swift 1.0 Jun 2014 Dec 2015 Open Source Sep 2017 Swift 4.0
12. Vapor
15. Examples
21. Why?
22. …
23. Same language = Reuse code
24. SERVER CLIENT
25. SERVER CLIENT CORE CORE
26. SERVER CLIENT CORE
27. import Foundation public final class Message: Codable { public var id: Int? public var text: String public let dateCreated: Date public init(id: Int? = nil, text: String) { self.id = id self.text = text self.dateCreated = Date() } } Core
28. Server import Vapor import FluentSQLite import SwiftChatCore extension Message: SQLiteModel { } extension Message: Migration { } extension Message: Content { } extension Message: Parameter { }
29. Client import Foundation import SwiftChatCore func sendMessage(_ message: Message) { var request = URLRequest(url: messagesUrl) request.httpMethod = "POST" request.addValue(“application/json", forHTTPHeaderField: "Content-Type") request.httpBody = try? encoder.encode(message) URLSession.shared.dataTask(with: request).resume() }
30. Same language = Reuse knowledge
31. All of this = Reduce time to market
32. github.com/cardoso/ SwiftChatCore SwiftChatServer SwiftChatClient
33. SERVER CLIENT CORE Package.swift Podfile
36. Fast
37. Native x Interpreted
38. ARC x GC
39. More Predictable
40. ASYNC x SYNC
41. ASYNC func create(_ req: Request) throws -> Future<Message> { return try req.content.decode(Message.self).flatMap { $0.save(on: req) } }
42. ASYNC func create(_ req: Request) throws -> Future<Message> { return try req.content.decode(Message.self).flatMap { $0.save(on: req) } }
43. ASYNC func create(_ req: Request) throws -> Future<Message> { return try req.content.decode(Message.self).flatMap { $0.save(on: req) } }
44. ASYNC func create(_ req: Request) throws -> Future<Message> { return try req.content.decode(Message.self).flatMap { $0.save(on: req) } }
45. Event Loops
46. 1 E.L Node
47. 1 E.L/L.U Vapor (3)
48. Conn 1 Conn 2 NIO-ELT-#0 Conn 3 Conn 4 NIO-ELT-#1 Conn 5 Conn 6 NIO-ELT-#2 Conn 7 Conn 8 NIO-ELT-#3 Conn 9 Conn 10 NIO-ELT-#4 Conn 11 Conn 12 NIO-ELT-#5
50. router.get("thread") { req in Thread.current.name ?? "" } http://localhost:8080/ thread
51. docs.vapor.codes/3.0/ async/overview/
52. Extensible
53. Droplet Config Auth Provider Router Views JSON Session VAPOR HTTP WSS SMTP ENGINE Model Driver FLUENT (ORM) Query Poly NODE Path CORE
54. Droplet Config Auth Provider Router Views JSON Session VAPOR HTTP WSS SMTP ENGINE Model Driver FLUENT (ORM) Query Poly NODE Path CORE
55. Droplet Config Auth Provider Router Views JSON Session VAPOR HTTP WSS SMTP ENGINE Model Driver FLUENT (ORM) Query Poly NODE Path CORE
56. Path Service Providers
57. Path public protocol Provider { func register(_ services: inout Services) throws func willBoot(_ container: Container) throws -> Future<Void> func didBoot(_ container: Container) throws -> Future<Void> } public protocol VaporProvider: Provider { func willRun(_ worker: Container) throws -> Future<Void> func didRun(_ worker: Container) throws -> Future<Void> }
58. Secure
59. TLS OpenSSL BCrypt
60. try db.query(Message.self) .filter(\Message.id >= date) .all()
61. Expressive
62. router.get("hello") { _ in "Hello, world!" }
63. Fun
64. Compile-time Safety = Less debugging
65. High level framework = Small learning curve
68. vapor.codes
71. 100% FOSS Chat Platform
74. Native Apps
81. github.com/RocketChat /Rocket.Chat /Rocket.Chat.iOS /Rocket.Chat.Android
83. open.rocket.chat #ios-beta
84. thedevconf.rocket.chat #trilha-ios open.rocket.chat #ios-beta
86. class Cardoso: iOSDeveloper { let name = "Matheus Cardoso" let company = "Rocket.Chat" let github = "github.com/cardoso" let email = "matheus@cardo.so" }
87. Thanks!