wałdis iljuczonok (aka technical fellow)

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Silvester McCormick
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2 wałdis iljuczonok (aka technical fellow) tech guy at getadigital.com (Microsoft.Net + Episerver)

3 Dependency Injection in Episerver

6 Why?

8 Definition

9 What is

10 public class Class1 { public Class1() { } public Answer Method1(string directory) { //... } } return...;

11 «DI is a set of principles and patterns that enable loose coupling *» * -

14 Patterns

15 public class Class1 { private readonly ISomeService _service; public Class1(ISomeService service) { _service = service; } Constructor Injection Property Injection Method Injection } public IAnotherService AnotherService { private get; set; } public Answer Method1(IThirdService thridservice) { return thridservice.couldbe()? Answer.Yes() : Answer.No(); }

16 public class Class1 { private readonly ISomeService _service; public Class1(ISomeService service) { _service = service; } } public IAnotherService AnotherService { private get; set; } public Answer Method1(IThirdService thridservice) { return thridservice.couldbe()? Answer.Yes() : Answer.No(); } Ambient Context

18 Composition

19 Layered

20 Onion

21 hexagonal

22 pizza

23 Main(string[] args) Global.asax & IControllerFactory Startup.cs & RouterMiddleware Application.OnStartup..rely on

24 RRR

25 Anti-Patterns

26 Control

27 public class Class1 { private readonly ISomeService _service; public Class1(ISomeService service) { _service = service; } } public IAnotherService AnotherService { private get; set; } public Answer Method1(IThirdService thridservice) { return thridservice.couldbe()? Answer.Yes() : Answer.No(); }

28 public class Class1 { private readonly ISomeService _service; public Class1() { _service = new SomeService(); } } public IAnotherService AnotherService { private get; set; } public Answer Method1() { var thridservice = new ThirdService(); return thridservice.couldbe()? Answer.Yes() : Answer.No(); }

29 Control Freak Bastard

30 public class Class1 { private readonly ISomeService _service; public Class1() { _service = new SomeService(); } } public IAnotherService AnotherService { private get; set; } public Answer Method1() { var thridservice = new ThirdService(); return thridservice.couldbe()? Answer.Yes() : Answer.No(); }

31 public class Class1 { private readonly ISomeService _service; public Class1(ISomeService service) { _service = service; } public Class1() : this(new SomeService()) { _service = new SomeService(); } } public IAnotherService AnotherService { private get; set; } public Answer Method1() { var thridservice = new ThirdService(); return thridservice.couldbe()? Answer.Yes() : Answer.No(); }

32 Control Freak Bastard Injections Constrained

34 Control Freak Bastard Injections Constrained Construction Service

38 Don t ask, we will call you! Hollywood Principle

39 @tech_fellow

40 DI (IoC)

41 Autofac Caliburn.Micro Catel DryIoc DryIocZero Dynamo ffastinjector Funq Grace Griffin HaveBox IfInjector LightCore LightInject LinFu Maestro Mef Mef2 MicroSliver Microsoft.Extensions.DependencyInjection Mugen Munq Ninject Petite SimpleInjector Spring.NET Stashbox StructureMap StyleMVVM TinyIoC Unity

42 Personal Experience with DI (Episerver)

43 Scheduled

44 Initialization

45 Episerver Forms

46 Razor

47 Extension

48 Episerver DI

49 Episerver Developer Tools

50 DI Friendly Libraries

51 Conforming

53 *.Ninject *.StructureMap *.Unity *.<your-container>

54 *.Ninject *.StructureMap *.Unity *.<your-container>

55 Constructor

56 DI Friendly Frameworks

57 [ServiceConfiguration(

61 Extra Bonus with DI

63 russian doll model

64 Validation Pre/post processing Authorization Logging Auditing Event dispatching Notifications Unit of

65 Decorators vs

66 Create loose-coupling code Demand dependencies from consumer Leverage DI container features Look for

67 Be a BOY

DI Why? Getting a Grip on Dependency Injection. Jeremy Clark

DI Why? Getting a Grip on Dependency Injection Jeremy Clark www.jeremybytes.com @jeremybytes What Is Dependency Injection? Dependency Injection is a software design pattern that allows a choice of component