Hi All,

I haven't seen any example code regarding the proper way to construct a Reader using the SDK and wondered if I am doing things the wrong way.  In this example, I am determining in the OnInitialize method whether any records exist at all and returning the appropriate state.  Then when OnProcess is called, I return the first record which was found in OnInitialize and try and look for another one.  If there are no additional records, I return DoneProcessingData.  If I don't do it this way, I end up gettting additional null records.

The concern I have is that I am potentially doing a lot of work in the OnIinitialize to get that first record (could be say a minute), does this cause any issues?  It also makes things a little more complicated.  It would be much easier if I could signal to the PP host on each call whether the current request yields a value.  If I simply return a DoneProcessingData when there is no new value, I get a null row.

Thanks!

---Jonathan

public class SimpleSourceExample : IComponent

{

        private IEnumerator source;

        private int nextValue;

        public State OnInitialize(IContext context)

        {

            //just gimme 10 steps and you won't see me no more!

            source = Enumerable.Range(0, 10).GetEnumerator();

            //first read could actually be very slow

            if (source.MoveNext())

            {

                nextValue = source.Current;

                return State.ReadyForNewData;   

            }

            return State.DoneProcessingData;

        }

        public State OnProcess(IContext context, IDataRecord data)

        {

            data.GetProperties().Define("A Value", nextValue);

            if (!source.MoveNext())

            {

                return State.DoneProcessingData;

            }

            nextValue = source.Current;

           return State.ReadyForNewData;

        }

        public void OnFinalize(IContext context)

        {

        }

}