protected override void OnCommand(object message)
{
switch (message)
{
case RegisterUserCommand {
UserName: var userName
} :
Event e;
if (this.userNames.Contains(userName))
{
e = new UserAlreadyExists(userName);
}
else
{
e = new UserRegistered(userName);
}
Persist(e, Apply);
Context.System.EventStream.Publish(e);
break;
}
public static BadRequest OnUserAlreadyExists(UserAlreadyExists userAlreadyExists) => new BadRequest($@"User ""#{userAlreadyExists.User.Id} {userAlreadyExists.User.Name}"" already exists.");
public DuplicateUserException(string login, UserAlreadyExists innerException)
: base("This username is already taken.", innerException)
{
}