public class EfStartUpTask : IStartupTask 
{ 
 public void Execute() 
 { 
  var settings = EngineContext.Current.Resolve<DataSettings>(); 
  if (settings != null && settings.IsValid()) 
  { 
   var provider = EngineContext.Current.Resolve<IEfDataProvider>(); 
   if (provider == null) 
    throw new NopException("No EfDataProvider found"); 
   provider.SetDatabaseInitializer(); 
  } 
 } 

 public int Order 
 { 
  //ensure that this task is run first 
  get { return -1000; } 
 } 
}

protected override void OnModelCreating(DbModelBuilder modelBuilder) 
{ 
 //dynamically load all configuration 
 //System.Type configType = typeof(LanguageMap); //any of your configuration classes here 
 //var typesToRegister = Assembly.GetAssembly(configType).GetTypes() 

 var typesToRegister = Assembly.GetExecutingAssembly().GetTypes() 
 .Where(type => !String.IsNullOrEmpty(type.Namespace)) 
 .Where(type => type.BaseType != null && type.BaseType.IsGenericType && type.BaseType.GetGenericTypeDefinition() == typeof(EntityTypeConfiguration<>)); 
 foreach (var type in typesToRegister) 
 { 
 dynamic configurationInstance = Activator.CreateInstance(type); 
 modelBuilder.Configurations.Add(configurationInstance); 
 } 
 //...or do it manually below. For example, 
 //modelBuilder.Configurations.Add(new LanguageMap()); 



 base.OnModelCreating(modelBuilder); 
} 

//data layer 
var dataSettingsManager = new DataSettingsManager(); 
var dataProviderSettings = dataSettingsManager.LoadSettings(); 
builder.Register(c => dataSettingsManager.LoadSettings()).As<DataSettings>(); 
builder.Register(x => new EfDataProviderManager(x.Resolve<DataSettings>())).As<BaseDataProviderManager>().InstancePerDependency(); 


builder.Register(x => (IEfDataProvider)x.Resolve<BaseDataProviderManager>().LoadDataProvider()).As<IDataProvider>().InstancePerDependency(); 
builder.Register(x => (IEfDataProvider)x.Resolve<BaseDataProviderManager>().LoadDataProvider()).As<IEfDataProvider>().InstancePerDependency(); 

if (dataProviderSettings != null && dataProviderSettings.IsValid()) 
{ 
 var efDataProviderManager = new EfDataProviderManager(dataSettingsManager.LoadSettings()); 
 var dataProvider = (IEfDataProvider)efDataProviderManager.LoadDataProvider(); 
 dataProvider.InitConnectionFactory(); 

 builder.Register<IDbContext>(c => new NopObjectContext(dataProviderSettings.DataConnectionString)).InstancePerHttpRequest(); 
} 
else 
{ 
 builder.Register<IDbContext>(c => new NopObjectContext(dataSettingsManager.LoadSettings().DataConnectionString)).InstancePerHttpRequest(); 
} 


builder.RegisterGeneric(typeof(EfRepository<>)).As(typeof(IRepository<>)).InstancePerHttpRequest(); 

/// <summary> 
/// Set database initializer 
/// </summary> 
public override void SetDatabaseInitializer() 
{ 
 //pass some table names to ensure that we have nopCommerce 2.X installed 
 var tablesToValidate = new[] {"Customer", "Discount", "Order", "Product", "ShoppingCartItem"}; 

 //custom commands (stored proedures, indexes) 

 var customCommands = new List<string>(); 
 //use webHelper.MapPath instead of HostingEnvironment.MapPath which is not available in unit tests 
 customCommands.AddRange(ParseCommands(HostingEnvironment.MapPath("~/App_Data/SqlServer.Indexes.sql"), false)); 
 //use webHelper.MapPath instead of HostingEnvironment.MapPath which is not available in unit tests 
 customCommands.AddRange(ParseCommands(HostingEnvironment.MapPath("~/App_Data/SqlServer.StoredProcedures.sql"), false)); 
 
 var initializer = new CreateTablesIfNotExist<NopObjectContext>(tablesToValidate, customCommands.ToArray()); 
 Database.SetInitializer(initializer); 
}