Question

I have an interface defined as IStore, with two methods:

public interface IStore<TEntity>
{
    TEntity Get(object identifier);
    void Put(TEntity entity);
}

I want an event to be raised on the success of Put
(for reference, Put could store a row in a db, or file on the file system etc…)

So, a class implementing Istore for type of Product would look a bit like this:

class MyStore : IStore<Product>
{
    public Product Get(object identifier)
    {
        //whatever
    }

    public void Put(Product entity)
    {
        //Store the product in db
        //RAISE EVENT ON SUCCESS
    }
}

What i’m after, is a way of ensuring that every implementation of IStore raises the event –
should i have an abstract class instead, or as well as, the interface?

Answer 1

my suggestion:

public abstract class Store<TEntity>
{
    public abstract TEntity Get(object identifier);
    public void Put(TEntity entity)
    {
        //Do actions before call
        InternalPut(entity);
        //Raise event or other postprocessing
    }

    protected abstract void InternalPut(TEntity entity);
}

then override InternalPut in your class