//This contract is used to pass root endpoints from the SIP directory service
//into the kernel, which then either uses them or passes them via the abi
//to another SIP.

using System;
using Microsoft.SingSharp;
using Microsoft.Singularity.Channels;
using Microsoft.Singularity.Directory;

namespace Microsoft.Singularity.Directory
{
    public contract DirectoryServiceFeederContract : ServiceContract {
        out  message InitializationComplete();

        in   message GetNewDirectoryChannel();
        out  message AckNewChannel(DirectoryServiceContract.Imp:Start! imp);
        out  message NakNewChannel(ErrorCode error);

        override state Start: one {
            InitializationComplete! -> Ready;
        }

        state Ready: one {
            GetNewDirectoryChannel? -> (AckNewChannel!
                                        or NakNewChannel!) -> Ready;
        }
    }
}