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January 12th, 2009

BUY Tylenol ONLINE WITHOUT PRESCRIPTION, Last week i spent some time at work moving some common infrastructure classes which were used in multiple projects into its own little 'framework' assembly. This framework basically just provides everything we need to use the Request/Response Service Layer, where to buy Tylenol, Tylenol gel, ointment, cream, pill, spray, continuous-release, extended-release, the KnownTypeProvider, some stuff built on top of NHibernate (the QueryBatcher, canada, mexico, india, Online buying Tylenol hcl, Repository and UnitOfWork implementations), our own MVP implementation for WebForms and UserControls, purchase Tylenol, Buy cheap Tylenol, the Dispatcher (for easy communication with the Request/Response service layer, see that post for more details), order Tylenol online c.o.d, Order Tylenol online overnight delivery no prescription, and some Silverlight equivalents of some of these classes that were written by a coworker of mine.

This little framework uses the Windsor IoC container quite heavily so naturally, buy cheap Tylenol no rx, Buy Tylenol ONLINE WITHOUT prescription, everything needs to be registered properly. You also need to register your known Request/Response types with the KnownTypeProvider and you have to configure the NHibernate components to use the correct mapping files as well, Tylenol over the counter. Buy Tylenol from canada, The framework provides default implementations for pretty much all of the components, except for some that you need to provide implementations for yourself, buying Tylenol online over the counter, Buy Tylenol online cod, although abstract base classes are available in the framework assembly which you can inherit from. So i needed something which would allow me to easily configure the framework in every project that uses it, making it possible to override the implementation of certain components or use the default implementations when these are sufficient, BUY Tylenol ONLINE WITHOUT PRESCRIPTION. I really wanted to avoid the typical XM-Hell that this usually leads to, order Tylenol no prescription, Tylenol over the counter, so i wanted to go for a code-only approach.

First of all, order Tylenol from mexican pharmacy, Real brand Tylenol online, the business side behind the Request/Response WCF service. There's two ways to use this, buy Tylenol without prescription, Online buy Tylenol without a prescription, with or without NHibernate support (in case we have to work for... umm.., rx free Tylenol. BUY Tylenol ONLINE WITHOUT PRESCRIPTION, conservative clients). Japan, craiglist, ebay, overseas, paypal, So we start off with the following class:




namespace Trinity.Business


{


    public class Registration


    {


        public Registration(Assembly commonAssembly, Assembly businessAssembly)


        {


            CommonAssembly = commonAssembly;


            BusinessAssembly = businessAssembly;


            SetDefaultImplementationTypes();


        }


 


        public Assembly BusinessAssembly { get; private set; }


        public Assembly CommonAssembly { get; private set; }


        public Type IRequestProcessorImplementation { get; set; }


 


        private void SetDefaultImplementationTypes()


        {


            IRequestProcessorImplementation = typeof(RequestProcessor);


        }


    }


}



Nothing spectacular.., buy Tylenol no prescription. Buy cheap Tylenol no rx, This Registration class can be instantiated with two assembly references. The first is a Common assembly, buy Tylenol from mexico, Ordering Tylenol online, which contains the known Request/Response types that will be registered with the KnownTypeProvider. The second is the business assembly which contains all of the IRequestHandler implementations to handle each Request type so we can return a Response, buy Tylenol without a prescription. Finally, you can set the implementation type of the IRequestProcessor interface that the framework should use at runtime, BUY Tylenol ONLINE WITHOUT PRESCRIPTION. Buy generic Tylenol, Notice how this is optional and that a default implementation type is set.

We also have another Registration class which contains some more configuration possibilities for NHibernate usage:




    public class RegistrationWithNHibernateSupport : Registration


    {


        public RegistrationWithNHibernateSupport(Assembly commonAssembly, where can i buy Tylenol online, Australia, uk, us, usa, Assembly businessAssembly,


            string mappingAssemblyName) : base(commonAssembly, fast shipping Tylenol, Order Tylenol from United States pharmacy, businessAssembly)


        {


            MappingAssemblyName = mappingAssemblyName;


            SetDefaultImplementations();


        }


 


        public string MappingAssemblyName { get; private set; }


        public Type ISessionProviderImplementation { get; set; }


        public Type IActiveSessionManagerImplementation { get; set; }


        public Type IUnitOfWorkImplementation { get; set; }


 


        private void SetDefaultImplementations()


        {


            ISessionProviderImplementation = typeof(SessionProvider);


            IActiveSessionManagerImplementation = typeof(ActiveSessionManager);


            IUnitOfWorkImplementation = typeof(UnitOfWork);


        }


    }



Here we have an extra required constructor parameter to provide the name of the assembly which contains the embedded NHibernate mapping files. We also have 3 properties which enable you to provide implementation types for the ISessionProvider, Tylenol gel, ointment, cream, pill, spray, continuous-release, extended-release, Comprar en línea Tylenol, comprar Tylenol baratos, IActiveSessionManager and IUnitOfWork interfaces. Again, Tylenol trusted pharmacy reviews, Tylenol samples, the default implementation types are set automatically.

We can now configure the business side of the framework with the following two static methods in the Register class:




    public static class Register


    {


        public static void WithNHibernateSupport(RegistrationWithNHibernateSupport registration)


        {


            Normal(registration);


            RegisterNHibernateComponents(registration);


            RegisterAllRepositories(registration.BusinessAssembly);


        }


 


        public static void Normal(Registration registration)


        {


            RegisterRequestProcessor(registration);


            RegisterRequestAndResponseTypes(registration.CommonAssembly);


            RegisterRequestHandlers(registration.BusinessAssembly);


        }


    }



BUY Tylenol ONLINE WITHOUT PRESCRIPTION, I left out the implementations of the private methods for brevity. Although i will show you what the implementation of the NHibernate components looks like:




        private static void RegisterNHibernateComponents(RegistrationWithNHibernateSupport registration)


        {


            IoC.Container.Register(Component.For<ISessionProvider>()


                .ImplementedBy(registration.ISessionProviderImplementation)


                .Parameters(Parameter.ForKey("mappingAssemblyName").Eq(registration.MappingAssemblyName))


                .LifeStyle.Singleton);


 


            IoC.Register(typeof(IActiveSessionManager), purchase Tylenol ONLINE WITHOUT prescription, Where can i order Tylenol without prescription, registration.IActiveSessionManagerImplementation, IoC.LifeStyle.Singleton);


            IoC.Register(typeof(IUnitOfWork), buy Tylenol ONLINE WITHOUT prescription, Tylenol price, coupon, registration.IUnitOfWorkImplementation);


 


            // these 2 component implementations can not be overridden by consumers (why yes, that _is_ on purpose)


            IoC.Register<IQueryBatcherFactory, where can i buy cheapest Tylenol online, Where to buy Tylenol, QueryBatcherFactory>(IoC.LifeStyle.Singleton);


            IoC.Register<IQueryBatcher, QueryBatcher>();


        }



As you can see, online buying Tylenol hcl, Order Tylenol online overnight delivery no prescription, it always uses the implementation types that are set in the Registration instance, which refer to the default implementations if you didn't overwrite the property values, Tylenol for sale.

So how do we configure this to be usable in one of our projects. It's pretty easy:




            Assembly businessAssembly = Assembly.GetExecutingAssembly();


            Assembly commonAssembly = typeof(EmsRequest).Assembly;


 


            var registration = new RegistrationWithNHibernateSupport(commonAssembly, businessAssembly, "EMS.Mappings")


                {


                    IRequestProcessorImplementation = typeof(EmsRequestProcessor),


                    ISessionProviderImplementation = typeof(Infrastructure.NHibernate.SessionProvider)


                };


 


            Trinity.Business.Register.WithNHibernateSupport(registration);



As you can see i am providing my assembly containing my common Request/Response types, and my business assembly. I also provide the name of the assembly containing my mapping files, and i overwrite the implementation of 2 components in the framework. And that's about it.

It works the same way in the Web layer... for that i have the following Registration class:




namespace Trinity.WebForms


{


    public class Registration


    {


        public Registration(Assembly commonAssembly, Assembly webAssembly,


            Type resourceManagerFactoryImplementation)


        {


            WebAssembly = webAssembly;


            CommonAssembly = commonAssembly;


            IResourceManagerFactoryImplementation = resourceManagerFactoryImplementation;


            SetDefaultImplementationTypes();


        }


 


        public Assembly WebAssembly { get; private set; }


        public Assembly CommonAssembly { get; private set; }


 


        public Type IResourceManagerFactoryImplementation { get; set; }


        public Type ITextRepositoryManagerImplementation { get; set; }


        public Type ISessionStateImplementation { get; set; }


        public Type IRequestProcessorImplementation { get; set; }


        public Type IDispatcherImplementation { get; set; }


 


        private void SetDefaultImplementationTypes()


        {


            ITextRepositoryManagerImplementation = typeof(TextRepositoryManager);


            ISessionStateImplementation = typeof(WebSessionState);


            IRequestProcessorImplementation = typeof(RequestProcessorProxy);


            IDispatcherImplementation = typeof(Dispatcher);


        }


    }


}



And well, i guess you can imagine what the rest looks like :).

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  • Steve Py

    Interesting ideas. How many projects has this been utilized for so far?

    Just curious, what happens if you pass a RegistrationWithNHibernateSupport to Register.Normal?

    I’ve just been reading up more on SOLID & think I may have smelled OCP or DIP, then again I’m not fully up to speed and may just need a shower. ;)

  • http://davybrion.com Davy Brion

    the infrastructure bits have been used in 6 projects in the last 6 months.

    If you pass a RegistrationWithNHibernateSupport to Register.Normal, it will only register the stuff that’s needed for the Request/Response service layer, but not the NHibernate components… i probably should improve that :)