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Introduction to Model Driven Development with Sculpture – Part 1

, 3 Sep 2008
This article introduces how to create and manage .NET enterprise applications using your favorite technology (Data Access Application Block, LINQ, NHibernate, ASMX, and WCF) with the Model Driven Development approach by Sculpture.
DialogBox.zip
DialogBox
bin
Debug
Infrastructure.Interface.dll
Infrastructure.Layout.dll
Infrastructure.Library.dll
Infrastructure.Module.dll
Microsoft.Practices.CompositeUI.dll
Microsoft.Practices.CompositeUI.WinForms.dll
Microsoft.Practices.EnterpriseLibrary.Common.dll
Microsoft.Practices.EnterpriseLibrary.ExceptionHandling.dll
Microsoft.Practices.EnterpriseLibrary.ExceptionHandling.Logging.dll
Microsoft.Practices.EnterpriseLibrary.Logging.dll
Microsoft.Practices.ObjectBuilder.dll
Module1.dll
Module1.Interface.dll
Shell.exe
Shell.vshost.exe
DialogBox.gpState
Lib
Microsoft.Practices.CompositeUI.dll
Microsoft.Practices.CompositeUI.WinForms.dll
Microsoft.Practices.CompositeUI.WPF.dll
Microsoft.Practices.EnterpriseLibrary.Common.dll
Microsoft.Practices.EnterpriseLibrary.Data.dll
Microsoft.Practices.EnterpriseLibrary.Data.SqlCe.dll
Microsoft.Practices.EnterpriseLibrary.ExceptionHandling.dll
Microsoft.Practices.EnterpriseLibrary.ExceptionHandling.Logging.dll
Microsoft.Practices.EnterpriseLibrary.Logging.dll
Microsoft.Practices.ObjectBuilder.dll
Microsoft.Practices.SmartClient.ConnectionMonitor.dll
Microsoft.Practices.SmartClient.DisconnectedAgent.dll
Microsoft.Practices.SmartClient.EndpointCatalog.dll
Microsoft.Practices.SmartClient.EnterpriseLibrary.dll
Module1
Module1
Constants
obj
Debug
Refactor
TempPE
Properties
Services
Views
DialogView
View1
Module1.Interface
Constants
obj
Debug
Refactor
TempPE
Properties
Services
Source
Infrastructure
Infrastructure.Interface
bin
Debug
Infrastructure.Interface.dll
Microsoft.Practices.CompositeUI.dll
Microsoft.Practices.CompositeUI.WinForms.dll
Microsoft.Practices.EnterpriseLibrary.Common.dll
Microsoft.Practices.EnterpriseLibrary.ExceptionHandling.dll
Microsoft.Practices.ObjectBuilder.dll
BusinessEntities
Constants
obj
Debug
Refactor
TempPE
Properties
Services
Infrastructure.Layout
obj
Debug
Refactor
TempPE
Properties
Infrastructure.Library
bin
Debug
Infrastructure.Interface.dll
Infrastructure.Library.dll
Microsoft.Practices.CompositeUI.dll
Microsoft.Practices.CompositeUI.WinForms.dll
Microsoft.Practices.EnterpriseLibrary.Common.dll
Microsoft.Practices.EnterpriseLibrary.ExceptionHandling.dll
Microsoft.Practices.ObjectBuilder.dll
BuilderStrategies
EntityTranslators
EntLib
obj
Debug
Refactor
TempPE
Properties
Services
UI
Web References
Infrastructure.Module
obj
Debug
Refactor
TempPE
Properties
Shell
obj
Debug
Refactor
TempPE
Properties
SculptureExample.zip
WCF+LINQ
SculptureExample
Model
Properties
bin
Debug
obj
Debug
TempPE
MyFirstModel.Sculpture
MyFirstModel.Sculpture.diagram
Entities
Properties
bin
Debug
obj
Debug
TempPE
GeneratedCode
Entities
DataAccess
Properties
Settings.settings
bin
Debug
obj
Debug
TempPE
SQL
GeneratedCode
Repositories
Implementation
Interface
WCFService
Properties
bin
Debug
obj
Debug
TempPE
CustomCode
Translators
Services
GeneratedCode
DataContracts
Services
Contracts
Implementations
WCFHost
App_Data
Properties
bin
obj
Debug
TempPE
WCFHost.csproj.user
Services
CategoriesService.svc
ProductsService.svc
SculptureExample.gpState
NHibernate+ASMX
SculptureExample
Model
Properties
bin
Debug
obj
Debug
TempPE
MyFirstModel.Sculpture
MyFirstModel.Sculpture.diagram
Entities
Properties
bin
Debug
obj
Debug
TempPE
GeneratedCode
Entities
Mappings
DataAccess
Properties
bin
Debug
obj
Debug
TempPE
SQL
GeneratedCode
Repositories
Implementation
Interface
WCFService
Properties
bin
Debug
obj
Debug
TempPE
CustomCode
Translators
Services
GeneratedCode
DataContracts
Services
Contracts
Implementations
WCFHost
App_Data
Properties
bin
obj
Debug
TempPE
build.force
WCFHost.csproj.user
Services
CategoriesService.svc
ProductsService.svc
SculptureExample.gpState
Service
Properties
bin
Debug
obj
Debug
TempPE
CustomCode
Services
Translators
GeneratedCode
DataContracts
Services
Contracts
Implementations
WebService
App_Data
Properties
bin
obj
Debug
TempPE
WebService.csproj.user
Services
Lib
Castle.DynamicProxy.dll
Iesi.Collections.dll
log4net.dll
NHibernate.dll
SculptureExample_WPFMold.zip
SculptureExample
Model
Properties
bin
Debug
obj
Debug
TempPE
MyFirstModel.Sculpture
MyFirstModel.Sculpture.diagram
SculptureExample.suo
Entities
Properties
bin
Debug
obj
Debug
TempPE
GeneratedCode
Entities
Mappings
DataAccess
Properties
bin
Debug
obj
Debug
TempPE
SQL
GeneratedCode
Repositories
Implementation
Interface
SculptureExample.gpState
Service
Properties
bin
Debug
obj
Debug
TempPE
CustomCode
Services
Translators
GeneratedCode
DataContracts
Services
Contracts
Implementations
Lib
Castle.DynamicProxy.dll
Iesi.Collections.dll
log4net.dll
NHibernate.dll
WPFApplication
Properties
Settings.settings
bin
Debug
WPFApplication.vshost.exe.manifest
WPFApplication.vshost.exe
obj
Debug
TempPE
Controls
Controls
WPFMold
WPFMold.gpState
WPFMold.suo
WPFMold
Resources
ThemeBitmap.bmp
Properties
Output
WPFMold.Mold
Templates
bin
Microsoft.Data.ConnectionUI.Dialog.dll
Microsoft.Data.ConnectionUI.dll
Microsoft.Practices.RecipeFramework.Extensions.dll
Microsoft.Practices.RepositoryFactory.SchemaDiscovery.dll
Mold3.pdb
MoldBase.dll
MoldBase.pdb
Output
Template
obj
Debug
TempPE
Resource1.Designer.cs.dll
SampleUserControl_cs.cs.dll
SampleUserControl_xaml.cs.dll
SampleUserControl_xaml_cs.cs.dll
Window1_xaml.cs.dll
Window1_xaml_cs.cs.dll
Windows1_cs.cs.dll
Windows1_xaml.cs.dll
Lib
Dawliasoft.Sculpture.Common.dll
Dawliasoft.Sculpture.Dsl.dll
Helpers
//------------------------------------------------------------------------------
// <auto-generated>
//     This code was generated by Sculpture Code Generation Engine.
//     Changes to this file may cause incorrect behavior and will be lost if
//     the code is regenerated.
//     Generated On : 28/08/2008 06:20:10 م
// </auto-generated>
//------------------------------------------------------------------------------

using System.Runtime.Remoting.Messaging;
using System.Web;
using NHibernate;
using NHibernate.Cache;
using NHibernate.Cfg;

namespace DataAccess
{
    /// <summary>
    /// Handles creation and management of sessions and transactions.  It is a singleton because 
    /// building the initial session factory is very expensive. Inspiration for this class came 
    /// from Chapter 8 of Hibernate in Action by Bauer and King.  Although it is a sealed singleton
    /// you can use TypeMock (http://www.typemock.com) for more flexible testing.
    /// </summary>
    public sealed class NHibernateSessionManager
    {
        #region Thread-safe, lazy Singleton

        /// <summary>
        /// This is a thread-safe, lazy singleton.  See http://www.yoda.arachsys.com/csharp/singleton.html
        /// for more details about its implementation.
        /// </summary>
        public static NHibernateSessionManager Instance {
            get {
                return Nested.NHibernateSessionManager;
            }
        }

        /// <summary>
        /// Initializes the NHibernate session factory upon instantiation.
        /// </summary>
        private NHibernateSessionManager() {
            InitSessionFactory();
        }

        /// <summary>
        /// Assists with ensuring thread-safe, lazy singleton
        /// </summary>
        private class Nested
        {
            static Nested() { }
            internal static readonly NHibernateSessionManager NHibernateSessionManager = 
                new NHibernateSessionManager();
        }

        #endregion

        private void InitSessionFactory()
        {
            Configuration cfg = new Configuration();
            cfg.AddAssembly("Entities");
            sessionFactory = cfg.BuildSessionFactory();
        }

        /// <summary>
        /// Allows you to register an interceptor on a new session.  This may not be called if there is already
        /// an open session attached to the HttpContext.  If you have an interceptor to be used, modify
        /// the HttpModule to call this before calling BeginTransaction().
        /// </summary>
        public void RegisterInterceptor(IInterceptor interceptor) {
            ISession session = ContextSession;

            if (session != null && session.IsOpen) {
                throw new CacheException("You cannot register an interceptor once a session has already been opened");
            }

            GetSession(interceptor);
        }

        public ISession GetSession() {
            return GetSession(null);
        }

        /// <summary>
        /// Gets a session with or without an interceptor.  This method is not called directly; instead,
        /// it gets invoked from other public methods.
        /// </summary>
        private ISession GetSession(IInterceptor interceptor) {
            ISession session = ContextSession;

            if (session == null) {
                if (interceptor != null) {
                    session = sessionFactory.OpenSession(interceptor);
                }
                else {
                    session = sessionFactory.OpenSession();
                }

                ContextSession = session;
            }

            return session;
        }

        /// <summary>
        /// Flushes anything left in the session and closes the connection.
        /// </summary>
        public void CloseSession() {
            ISession session = ContextSession;

            if (session != null && session.IsOpen) {
                session.Flush();
                session.Close();
            }

            ContextSession = null;
        }

        public void BeginTransaction() {
            ITransaction transaction = ContextTransaction;

            if (transaction == null) {
                transaction = GetSession().BeginTransaction();
                ContextTransaction = transaction;
            }
        }

        public void CommitTransaction() {
            ITransaction transaction = ContextTransaction;

            try {
                if (HasOpenTransaction()) {
                    transaction.Commit();
                    ContextTransaction = null;
                }
            }
            catch (HibernateException) {
                RollbackTransaction();
                throw;
            }
        }

        public bool HasOpenTransaction() {
            ITransaction transaction = ContextTransaction;

            return transaction != null && !transaction.WasCommitted && !transaction.WasRolledBack;
        }

        public void RollbackTransaction() {
            ITransaction transaction = ContextTransaction;

            try {
                if (HasOpenTransaction()) {
                    transaction.Rollback();
                }

                ContextTransaction = null;
            }
            finally {
                CloseSession();
            }
        }

        /// <summary>
        /// If within a web context, this uses <see cref="HttpContext" /> instead of the WinForms 
        /// specific <see cref="CallContext" />.  Discussion concerning this found at 
        /// http://forum.springframework.net/showthread.php?t=572.
        /// </summary>
        private ITransaction ContextTransaction {
            get {
                if (IsInWebContext()) {
                    return (ITransaction)HttpContext.Current.Items[TRANSACTION_KEY];
                }
                else {
                    return (ITransaction)CallContext.GetData(TRANSACTION_KEY);
                }
            }
            set {
                if (IsInWebContext()) {
                    HttpContext.Current.Items[TRANSACTION_KEY] = value;
                }
                else {
                    CallContext.SetData(TRANSACTION_KEY, value);
                }
            }
        }

        /// <summary>
        /// If within a web context, this uses <see cref="HttpContext" /> instead of the WinForms 
        /// specific <see cref="CallContext" />.  Discussion concerning this found at 
        /// http://forum.springframework.net/showthread.php?t=572.
        /// </summary>
        private ISession ContextSession {
            get {
                if (IsInWebContext()) {
                    return (ISession)HttpContext.Current.Items[SESSION_KEY];
                }
                else {
                    return (ISession)CallContext.GetData(SESSION_KEY); 
                }
            }
            set {
                if (IsInWebContext()) {
                    HttpContext.Current.Items[SESSION_KEY] = value;
                }
                else {
                    CallContext.SetData(SESSION_KEY, value);
                }
            }
        }

        private bool IsInWebContext() {
            return HttpContext.Current != null;
        }

        private const string TRANSACTION_KEY = "CONTEXT_TRANSACTION";
        private const string SESSION_KEY = "CONTEXT_SESSION";
        private ISessionFactory sessionFactory;
    }
}

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License

This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

About the Author

Ahmed Negm
Chief Technology Officer www.Dawliasoft.com
Egypt Egypt
Program Manager in Sculpture project, Interesting in .NET Model driven development.

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