Repository

Generic repository to get domain objects from any of the sources (Database, Entity framework, File system and etc.,.)

Repository patteren is one of the nicest patterns of all time and here is the generic repository pattern template. By making use of this template one can avoid lot of boilerplate code.

Goal of this template

As mentioned earlier, goal of this template is to reduce lot of boilerplate code and business access layer will never bother about underlying data source. Underlying datasource could be anything like Database (ADO.Net), Entity framework, API, File system, Web service and etc.,.

Business layer just see eveything as objects comes out of repository.

How this works?

Fork or Download GitHub repository("GenRep") to see how this works in action.

Api repository

Api repository GET call looks like

    public void Api_RetrieveGitUserTest()
    {
        IRepository<GitUser> userRepository = new ApiRepository<GitUser>("GitUserApi");
        var gitUser = userRepository.Get();
    }

Api repository GET call with URL parameters looks like

    public void Api_RetrieveAllGitUserTest()
    {
        IDictionary<string, string> parameters = new Dictionary<string, string>() { { "since", "135" } };
        IDictionary<string, object> input = new Dictionary<string, object>();
        input.Add("Parameters", parameters);

        IRepository<GitUser> usersRepository = new ApiRepository<GitUser>("GitUsersApi");
        usersRepository.Input = input;
        List<GitUser> gitUsers = usersRepository.GetAll().ToList();
    }

Entity framework code first repository

EF code first repository call looks like

    public void EFCodeFirst_RetrieveCustomersTest()
    {
        IRepository<Customer> customersRepository = new EntityFrameworkRepository<Customer>();
        var customers = customersRepository.GetAll().ToList();
    }

EF code first repository call for creation looks like

    public void EFCodeFirst_CreateCustomerTest()
    {
        IRepository<Customer> customersRepository = new EntityFrameworkRepository<Customer>();
        Customer customer = new Customer()
        {
            FName = "Dave",
            LName = "Richardson",
            Address1 = "605 Sharview Cir",
            Address2 = "#1735",
            State = "NC",
            Country = "USA",
            Zipcode = "28217",
            Phone = "1234567890",
            Email = "a@a.com"
        };
        var response = customersRepository.Add(customer);
        customersRepository.SaveChanges();
    }

EF code first repository call for updation looks like

    public void EFCodeFirst_UpdateCustomerTest()
    {
        IRepository<Customer> customersRepository = new EntityFrameworkRepository<Customer>();
        var customer = customersRepository.GetBy(x => x.Id == 1);
        customer.FName = "Andy";
        var response = customersRepository.Update(customer);
        customersRepository.SaveChanges();
    }

Entity framework database first repository

yet to update (This one is similar to code frist approach)

Database(ADO.Net) repository

yet to update

Web service repository

Web service repository call looks like

    public void WcfService_RetrieveCustomersTest()
    {
        IRepository<Customer> customersRepository = new ServiceRepository<Customer>();
        var customers = customersRepository.GetAll().ToList();
    }        

Web service repository call for creation looks like

    public void WcfService_CreateCustomerTest()
    {
        IRepository<Customer> customersRepository = new ServiceRepository<Customer>();
        Customer customer = new Customer()
        {
            FName = "Dave" + DateTime.Now,
            LName = "Richardson",
            Address1 = "605 Sharview Cir",
            Address2 = "#1735",
            State = "NC",
            Country = "USA",
            Zipcode = "28217",
            Phone = "1234567890",
            Email = "a@a.com"
        };
        var response = customersRepository.Add(customer);
    }

Web service repository call for updation looks like

    public void WcfService_UpdateCustomerTest()
    {
        IRepository<Customer> customersRepository = new ServiceRepository<Customer>();
        var customer = customersRepository.GetBy(x => x.Id == 1);
        customer.FName = "Andy";
        var response = customersRepository.Update(customer);
    }

File system repository

yet to update