Domain services documentation queries....

Hi,

I have read http://aspnetboilerplate.com/Pages/Documents/Domain-Services and a few things are a little unclear to me.

1. You make reference to ITaskPolicy which is never implemented. I am assuming:

    taskPolicy.CheckIfCanAssignTaskToPerson();

is the code?

Might be worth showing the implementation.

1. After “creating” the domain service “TaskManager” you then don’t actually use it in your Entity method:

public class Task : Entity<long>
{
    public virtual int? AssignedPersonId { get; protected set; }

    //...other members and codes of Task entity

    public void AssignToPerson(Person person, ITaskPolicy taskPolicy)
    {
        taskPolicy.CheckIfCanAssignTaskToPerson(this, person);

        AssignedPersonId = person.Id;
    }
}

shouldn’t this be:

public class Task : Entity<long>
{
    public virtual int? AssignedPersonId { get; protected set; }

    //...other members and codes of Task entity

    public void AssignToPerson(Person person, ITaskPolicy taskPolicy)
    {
        _TaskManager.AssignTaskToPerson(this, person, taskPolicy);
    }
}

because then you would reuse same in say a staff entity that had a reference to a person entity as:

public class Staff : Entity<long>
{
     public virtual Person { get; set; }

    public void AssignTask(Task task, ITaskPolicy taskPolicy)
    {
        _TaskManager.AssignTaskToPerson(task, this.Person, taskPolicy);
    }
}

My understanding being that the purpose of a domain service it to actually do the domain operations. Have them all centralised and not replicated in the implementation of the entities themselves.

[hikalkan]

Thank you very much for you good sayings. I’m motivated when reading such comments. I left my job to work on these projects. So, I believe that they will be much better by the time 😃

[natiki]

Hi,

Thanks for getting back to me. I am also still learning DDD so am no expert.

Just wanted to say again a big thanks for making ABP available. It is great and has made my life a heap easier. I am getting it deployed across a number of new developments and it has been invaluable in getting those going quickly and “in good practice”. This has been especially helpful for junior developers who have not got a heap of design/architecture experience. The great thing is that you have documented stuff as you go so there is good documentation to support it all as well.

I am also now looking at module zero (free version) to handle a new multi-tenant requirement and it looks like it is as good as ABP ie. Does what you need and does not try and do everything and get in the way. So thanks again.