DDD: MailService.SendNotificationToUser() or User.Notify()?
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Published on 2012-03-21T17:26:25Z
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c#-4.0
I seem to stumble on problem after problem giving my entities behavior.
I have a system where a user gets a notification when someone comments his article. Right now it is via an e-mail.
I'm struggeling how to implement this the DDD way.
Option 1
User entity has a Notify method: User.Notify() The method uses C# built in classes to send an e-mail notification via e-mail
The problem with having this in the domain is that it is technology spesific, and how a user is notified might change in the future. I feel this belongs to infrastructure, but how then can a user have behavior?
Option 2
I create a Service: NotificationService.Notify(User) The Service uses C# built in classes to send an e-mail
The pro is that the service could be an Application Service, and as far as I know an application service can use the infrastructure and call things like the System.Net.Mail and repositories for that sake.
How would you implement this?
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