Runtime Library Version: 2.6.8.1013
.NET 3.5, Adapter, General2008, Oracle 9i
I am getting a NullReferenceException once I include IPrefetchPath2 into my remoting interface. The exception details including locals window, call stack etc. is attached. If I remove the signature with IPrefetchPath2, everything works fine. If it is present, the exception happens regardless of whether I call the overload with the prefetch, or the other FetchEntity method without it.
Any ideas? Please let me know if any other info is needed be it assembly references etc. Thanks
Remote data server interface:
namespace CRMA.Core.DataAccess
{
public interface IDataServer
{
int CommitUnitOfWork(UnitOfWork2 uow);
TEntity FetchEntity<TEntity>(TEntity entity)
where TEntity : EntityBase2, new(); //IEntity2
[b] //ISSUE: If IPrefetchPath2 is used here, null ref ex upon remoting:
TEntity FetchEntity<TEntity>(TEntity entity, IPrefetchPath2 prefetchPath)
where TEntity : EntityBase2, new(); //IEntity2[/b]
EntityCollection<TEntity> FetchEntityCollection<TEntity>(
IRelationPredicateBucket filterBucket, ExcludeIncludeFieldsList fields,
ISortExpression sort)
where TEntity : EntityBase2, new();
EntityCollection<TEntity> FetchEntityCollection<TEntity>(
IRelationPredicateBucket filterBucket)
where TEntity : EntityBase2, new();
EntityCollection<TEntity> FetchEntityCollection<TEntity>(
IPredicateExpression filter)
where TEntity : EntityBase2, new();
EntityCollection<TEntity> FetchEntityCollection<TEntity>(
IPredicateExpression filter, ExcludeIncludeFieldsList fields,
ISortExpression sort)
where TEntity : EntityBase2, new();
TView FetchTypedView<TView>(IPredicateExpression filter)
where TView : ITypedView2, new();
T FetchLookups<T>() where T : DataAccessObjectBase, IServerLookups<T>, new();
T Fetch<T>() where T : DataAccessObjectBase, IServerFetch<T>, new();
TDataAccess Fetch<TDataAccess, UParam>(UParam param)
where TDataAccess : DataAccessObjectBase, IParameterizedFetch<TDataAccess, UParam>, new();
}
}
DataServer (entity partial) in service library used in console (debugging) and service (server side):
namespace CRMA.ServiceLibrary
{
partial class DataServer
{
public TEntity FetchEntity<TEntity>(TEntity entity)
where TEntity : EntityBase2, new() //IEntity2
{
try
{
using (IDatabaseAdapter adapter = DataAccessAdapterFactory.Create())
{
adapter.FetchEntity(entity);
return entity;
}
}
catch (ORMQueryExecutionException queryEx)
{
throw HandleQueryExecutionError(queryEx);
}
}
public TEntity FetchEntity<TEntity>(TEntity entity, IPrefetchPath2 prefetchPath)
where TEntity : EntityBase2, new() //IEntity2
{
try
{
using (IDatabaseAdapter adapter = DataAccessAdapterFactory.Create())
{
adapter.FetchEntity(entity, prefetchPath);
return entity;
}
}
catch (ORMQueryExecutionException queryEx)
{
throw HandleQueryExecutionError(queryEx);
}
}
}
}
Data Access Class:
namespace CRMA.DataAccess.EntitySpecific.Server
{
public class BatchDataAccess : DataAccessObjectBase
{
public static BatchesEntity GetBatch(long batchId)
{
BatchesEntity batch = new BatchesEntity(batchId);
return Remote.DataServer.FetchEntity<BatchesEntity>(batch);
}
public static BatchesEntity GetBatchWithChartReviews(long batchId)
{
BatchesEntity batch = new BatchesEntity(batchId);
IPrefetchPath2 prefetchPath = new PrefetchPath2(EntityType.BatchesEntity);
prefetchPath.Add(BatchesEntity.PrefetchPathChartReviews);
return Remote.DataServer.FetchEntity<BatchesEntity>(batch, prefetchPath);
}
}
}
Remote server access class:
namespace CRMA.DataAccess.Core
{
public class Remote
{
public static IDataServer DataServer { get; set; }
static Remote()
{
// will get set by client when remoting is initialized
//Remote._dataServer = new DataServer();
}
}
}
Client app startup:
private static void AppStartup()
{
//RemotingConfiguration.Configure("CRMA.Client.exe.config", false);
TcpChannel channel = new TcpChannel();
ChannelServices.RegisterChannel(channel, true);
MarshalByRefObject mbro = (MarshalByRefObject)RemotingServices.Connect(
typeof(IDataServer), GetEndPointUrl());
Remote.DataServer = mbro as IDataServer;
if (null == Remote.DataServer)
{
throw new Exception("Service couldn't be obtained. Aborting");
}
// null ref ex if IPrefetch2 is in IDataServer interface:
CRMA.Model.EntityClasses.BatchesEntity entity
= CRMA.DataAccess.EntitySpecific.Server.BatchDataAccess.GetBatch(1);
LookupDataCache.Singleton.LoadSharedLookupData();
}
Console:
namespace CRMA.Console
{
class Program
{
[System.Runtime.InteropServices.DllImport("user32.dll")]
private static extern bool ShowWindow(IntPtr hWnd, int nCmdShow);
private const int SW_MINIMIZE = 6;
private const int SW_MAXIMIZE = 3;
private const int SW_RESTORE = 9;
static void Main(string[] args)
{
RemotingConfiguration.Configure("CRMA.Console.exe.config", false);
MinimizeConsole();
System.Console.WriteLine("Press <ENTER> key to shut down server.");
System.Console.ReadLine();
}
private static void MinimizeConsole()
{
IntPtr winHandle = Process.GetCurrentProcess().MainWindowHandle;
ShowWindow(winHandle, SW_MINIMIZE);
}
}
}
Console app config remoting section:
<system.runtime.remoting>
<customErrors mode="Off"/>
<application name="CRMA.Console">
<service>
<wellknown mode="SingleCall" objectUri="theEndPoint"
type="CRMA.ServiceLibrary.DataServer, CRMA.ServiceLibrary" />
</service>
<channels>
<channel ref="tcp" port="65100" secure="true" impersonate="true">
<clientProviders>
<formatter ref="binary" />
</clientProviders>
<serverProviders>
<!-- <provider type="Product.Common.Remoting.CompressionServerSinkProvider, Product.Common" /> -->
<formatter ref="binary" typeFilterLevel="Full" />
</serverProviders>
</channel>
</channels>
</application>
</system.runtime.remoting>
