DemoScript.txt

Domain Events Demo
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Create new Console Application
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Create new Console Solution

Add StructureMap via nuget (local)
Add JaySmith.DomainEvents.StructureMap via nuget (local)
	
Create BootStrapper class
	public static class BootStrapper
	public static void Initalize()
	{
		ObjectFactory.Initialize(x => x.Scan(scan =>
		{
			scan.TheCallingAssembly();
			scan.WithDefaultConventions();
			scan.AssembliesFromApplicationBaseDirectory();
			scan.LookForRegistries();
		}
	}
	
Create DemoApplication

	public class DemoApplication
    {
        public void Run()
        {
			//Where something interesting happens
			Console.Writeline("Domain Event Demo");
        }
    }
	
Modify Program Main
	static void Main(string[] args)
    {
		Bootstrapper.Initialize();

		var application = ObjectFactory.GetInstance<DemoApplication>();
        application.Run();

        Console.Read();
    }
	
Run Demo to make sure it is working so far	

Add Domain Folder
Add Domain Object: Person
	Constructor (string firstName, string lastName)
	
	Properties 
		FirstName 	AUTO
		LastName	AUTO
		        	
		Full Name Getter Only - return string.Format("{0} {1}", FirstName, LastName);
		
		Stub out UpdateLastName(string newLastName)
		public void UpdateLastName(string newLastName)
        {
            LastName = newLastName;
        }
		
Modify DemoApplication Run
	{
		var person = new Person("Kristina", "Parker");
		person.UpdateLastName = "Smith";
	}
	
Talk about LastName Changed as an interesting event

Create DomainEvents Folder
Add PersonLastNameChangedEvent
	public class PersonLastNameChangedEvent : IDomainEvent
	{
		public Person Person { get; set; }
		public string OldValue { get; set; }
		public string NewValue { get; set; }

		public PersonLastNameChangedEvent(Person person, string oldValue, string newValue )
		{
			this.Person = person;
			this.OldValue = oldValue;
			this.NewValue = newValue;
		}
	}

Modify the Person class to raise the event when the last name is changed
	public void UpdateLastName(string newLastName)
        {
            var oldLastName = LastName;
            LastName = newLastName;

            var lastNameChangedEvent = new PersonLastNameChangedEvent(this, oldLastName, newLastName);
            DomainEventManager.Raise(lastNameChangedEvent);
        }

The event gets raised but nothing is listening to for the event. So, lets do
something when this event happens, to do that we need an event handler.
		
Add DomainEventHandlers Folder
Add PersonLastNameCHangedEventHandler
	
	public class PersonLastNameChangedEventHandler : IDomainEventHandler<PersonLastNameChangedEvent>
	{
		public void Handle(PersonLastNameChangedEvent args)
		{
			Console.WriteLine("Lastname changed from {0} to {1}", args.OldValue, args.NewValue);
		}
	}

Modify BootStrapper
	scan.ConnectImplementationsToTypesClosing(typeof(IDomainEventHandler<>));
	
Run Program to show how the event fires.
Go over how domain events are found and executed