An internal exception occurred within the LightSpeed Distributed UnitOfWork Service

I cannot seem to get the DistributedUnitOfWork Service to connect. I have the service exposed via and Svc file and running on the asp.net development web server. The code and exception message are detailed below. Any help you can provide would be much appreciated.

Lightspeed version 5.0.2544.0

MyModelUnitOfWorkService.cs

 [AspNetCompatibilityRequirements(RequirementsMode = AspNetCompatibilityRequirementsMode.Allowed)]
    public class MyModelUnitOfWorkService : DistributedUnitOfWorkService
    {
        public MyModelUnitOfWorkService()
            : base(ContextFactory.GetModuleContext<MyModelUnitOfWorkService >().CreateUnitOfWork())
        {
        }

        public MyModelUnitOfWorkService (LightSpeedContext context)
            : base(context)
        {
        }

        public MyModelUnitOfWorkService (IUnitOfWork unitOfWork)
            : base(unitOfWork)
        {
        }
    }

MyModelUnitOfWorkService.svc

<%@ ServiceHost Debug="true" Service="WebServices.Client.MyModelUnitOfWorkService , WebServices, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null" %>

Client

 class Program
    {
        static void Main(string[] args)
        {
            do
            {    
                try
                {
                    var context = new LightSpeedContext<DistributedUnitOfWork>
                    {
                        UnitOfWorkFactory = new DistributedUnitOfWorkFactory<DistributedUnitOfWork>()
                        //new DistributedUnitOfWorkFactory<DistributedUnitOfWork>(new BasicHttpBinding(), new EndpointAddress(new Uri("http://localhost:55490/MyModelUnitOfWorkService.svc")))
                    };

                    using (var uow = context.CreateUnitOfWork())
                    {
                        Console.WriteLine(uow.Count<User>());
                    }
                }
                catch (Exception ex)
                {
                    Console.WriteLine(ex.Message);
                    Console.WriteLine(ex.StackTrace);
                }

            } while (Console.ReadKey().KeyChar != 'q');
        }
    }

ExceptionMessage

"An internal exception occurred within the LightSpeed Distributed UnitOfWork Service"

Server stack trace: at System.ServiceModel.Channels.ServiceChannel.ThrowIfFaultUnderstood(Message reply, MessageFault fault, String action, MessageVersion version, FaultConverter faultConverter) at System.ServiceModel.Channels.ServiceChannel.HandleReply(ProxyOperationRuntime operation, ProxyRpc& rpc) at System.ServiceModel.Channels.ServiceChannel.Call(String action, Boolean oneway, ProxyOperationRuntime operation, Object[] ins, Object[] outs, TimeSpan timeout) at System.ServiceModel.Channels.ServiceChannel.Call(String action, Boolean oneway, ProxyOperationRuntime operation, Object[] ins, Object[] outs) at System.ServiceModel.Channels.ServiceChannelProxy.InvokeService(IMethodCallMessage methodCall, ProxyOperationRuntime operation) at System.ServiceModel.Channels.ServiceChannelProxy.Invoke(IMessage message)

Exception rethrown at [0]: at System.Runtime.Remoting.Proxies.RealProxy.HandleReturnMessage(IMessage reqMsg, IMessage retMsg) at System.Runtime.Remoting.Proxies.RealProxy.PrivateInvoke(MessageData& msgData, Int32 type) at Mindscape.LightSpeed.ServiceModel.IDistributedUnitOfWorkContract.Count(String typename) at Mindscape.LightSpeed.ServiceModel.DistributedUnitOfWork.CountTEntity at ConsoleApplication1.Program.Main(String[] args) in c:\Users\Greg.FS\Documents\Visual Studio 2012\DistributedLightSpeedTest\ConsoleApplication1\Program.cs:line 34

This will mean an exception is occurring with the UnitOfWork being used by the DistributedUnitOfWorkService. You can hook the GeneralFailureOccurred event on the DistributedUnitOfWorkService to get access to the underlying exception to work out what the problem is.

Jeremy

Thanks, I was able to figure out the issue using the GenealFailureOccurred event. I am now able to call the service. However, If I execute any operation that returns an entity I get the below error on the client side. It appears that simple scalar values such as counts are returned just fine though. Our entities are generated from a custom t4 template, I'm not sure if this has something to do with the issue.

Client Code:

                try
                {
                    var context = new LightSpeedContext<DistributedUnitOfWork>
                    {
                        UnitOfWorkFactory = new DistributedUnitOfWorkFactory<DistributedUnitOfWork>()
                    };

                    using (var uow = context.CreateUnitOfWork())
                    {
                        var myUser = uow.FindById<UserRoleMap>(7067); //errors out; UserRoleMap entity is defined in a shared dll 
                        Console.WriteLine(myUser.Userid);
                        Console.WriteLine(uow.Count<User>()); //works fine
                    }
                }
                catch (Exception ex)
                {
                    Console.WriteLine(ex.Message);
                    Console.WriteLine(ex.StackTrace);
                }

UserRoleMap.cs

  [Serializable]
    [System.ComponentModel.DataObject]
    [Table("UserRoleMap")]
    public partial class UserRoleMap : CustomDbEntity<long>
    {
        public UserRoleMap()
        {
            CheckDtoMapped();
        }

        private static bool _isDtoMapped;
        public static void CheckDtoMapped()
        {
            if (!_isDtoMapped)
            {
                AutoMapperConfigHelper.CreateMap<UserRoleMap, UserRoleMapDto>();
                AutoMapperConfigHelper.CreateMap<UserRoleMapDto, UserRoleMap>();
                _isDtoMapped = true;
            }
        }

        public UserRoleMapDto AsDto()
        {
            return AutoMapper.Mapper.Map<UserRoleMap, UserRoleMapDto>(this);
        }

        #region Fields

        /// <summary>Identifies the Userid entity attribute.</summary>
        public const string UseridField = "Userid";
        [ValidatePresence]
        private long _userid;

        [Framework.Data.Models.ScalarDatabaseColumn]
        [System.Diagnostics.DebuggerNonUserCode]
        public long Userid
        {
            get { return Get(ref _userid, "Userid"); }
            set { TurnOnChangeTracking();  Set(ref _userid, value, "Userid"); }
        }

        /// <summary>Identifies the Roleid entity attribute.</summary>
        public const string RoleidField = "Roleid";
        [ValidatePresence]
        private long _roleid;

        [Framework.Data.Models.ScalarDatabaseColumn]
        [System.Diagnostics.DebuggerNonUserCode]
        public long Roleid
        {
            get { return Get(ref _roleid, "Roleid"); }
            set { TurnOnChangeTracking();  Set(ref _roleid, value, "Roleid"); }
        }

        /// <summary>Identifies the WorkAreaId entity attribute.</summary>
        public const string WorkAreaIdField = "WorkAreaId";
        [ValidatePresence]
        private long _workAreaId;

        [Framework.Data.Models.ScalarDatabaseColumn]
        [System.Diagnostics.DebuggerNonUserCode]
        public long WorkAreaId
        {
            get { return Get(ref _workAreaId, "WorkAreaId"); }
            set { TurnOnChangeTracking();  Set(ref _workAreaId, value, "WorkAreaId"); }
        }

        #endregion

        #region Relationships
        [ReverseAssociation("UserRoleMaps")]
        private readonly EntityHolder<ApplicationRole> _role = new EntityHolder<ApplicationRole>();
        [System.Diagnostics.DebuggerNonUserCode]
        public ApplicationRole Role
        {
            get { return Get(_role); }
            set { Set(_role, value); }
        }

        [ReverseAssociation("UserRoleMaps")]
        private readonly EntityHolder<User> _user = new EntityHolder<User>();
        [System.Diagnostics.DebuggerNonUserCode]
        public User User
        {
            get { return Get(_user); }
            set { Set(_user, value); }
        }

        [ReverseAssociation("UserRoleMaps")]
        private readonly EntityHolder<WorkArea> _workArea = new EntityHolder<WorkArea>();
        [System.Diagnostics.DebuggerNonUserCode]
        public WorkArea WorkArea
        {
            get { return Get(_workArea); }
            set { Set(_workArea, value); }
        }


        #endregion    
    }

    [System.Serializable]
    [System.Runtime.Serialization.DataContract(Name="UserRoleMap")]
    public partial class UserRoleMapDto : CustomModelDtoBase
    {
        public UserRoleMapDto()
        {
            UserRoleMap.CheckDtoMapped();
        }

        public UserRoleMap CopyTo(UserRoleMap entity)
        {
            return AutoMapper.Mapper.Map<UserRoleMapDto, UserRoleMap>(this, entity);
        }

        [System.Runtime.Serialization.DataMember]
        public long ID {get; set;}

        [System.Runtime.Serialization.DataMember]
        public long Userid {get; set;}

        [System.Runtime.Serialization.DataMember]
        public long Roleid {get; set;}

        [System.Runtime.Serialization.DataMember]
        public long WorkAreaId {get; set;}

    }

The underlying connection was closed: The connection was closed unexpectedly.

Server stack trace: at System.ServiceModel.Channels.HttpChannelUtilities.ProcessGetResponseWebException(WebException webException, HttpWe bRequest request, HttpAbortReason abortReason) at System.ServiceModel.Channels.HttpChannelFactory`1.HttpRequestChannel.HttpChannelRequest.WaitForReply(TimeSpan time out) at System.ServiceModel.Channels.RequestChannel.Request(Message message, TimeSpan timeout) at System.ServiceModel.Dispatcher.RequestChannelBinder.Request(Message message, TimeSpan timeout) at System.ServiceModel.Channels.ServiceChannel.Call(String action, Boolean oneway, ProxyOperationRuntime operation, O bject[] ins, Object[] outs, TimeSpan timeout) at System.ServiceModel.Channels.ServiceChannel.Call(String action, Boolean oneway, ProxyOperationRuntime operation, O bject[] ins, Object[] outs) at System.ServiceModel.Channels.ServiceChannelProxy.InvokeService(IMethodCallMessage methodCall, ProxyOperationRuntim e operation) at System.ServiceModel.Channels.ServiceChannelProxy.Invoke(IMessage message)

Exception rethrown at [0]: at System.Runtime.Remoting.Proxies.RealProxy.HandleReturnMessage(IMessage reqMsg, IMessage retMsg) at System.Runtime.Remoting.Proxies.RealProxy.PrivateInvoke(MessageData& msgData, Int32 type) at Mindscape.LightSpeed.ServiceModel.IDistributedUnitOfWorkContract.FindOne(String typename, Query query) at Mindscape.LightSpeed.ServiceModel.DistributedUnitOfWork.FindById[TEntity](Object id) at ConsoleApplication1.Program.Main(String[] args) in c:\Users\Greg.FS\Documents\Visual Studio 2012\DistributedLightS peedTest\ConsoleApplication1\Program.cs:line 32

Based on the exception I am thinking it sounds like a serialization issue - can you check if you can serialize the entities manually?

Jeremy

I got it figured out, it was a serialization issue. The T4 template I used did not have include any WCF serialization attributes on the entities which seems to be what was causing the exception. After I updated my templated to include the DataContract and DataMember attributes things started to work. Thanks for your help.