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//  see more at: https://github.com/JeremySkinner/FluentValidation
using FluentValidation;

public class CustomerValidator: AbstractValidator<Customer> {
  public CustomerValidator() {
    RuleFor(customer => customer.Surname).NotEmpty();
    RuleFor(customer => customer.Forename).NotEmpty().WithMessage("Please specify a first name");
    RuleFor(customer => customer.Discount).NotEqual(0).When(customer => customer.HasDiscount);
    RuleFor(customer => customer.Address).Length(20, 250);
    RuleFor(customer => customer.Postcode).Must(BeAValidPostcode).WithMessage("Please specify a valid postcode");

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public class MyServiceSample : IMyServiceSample
{         
  private readonly IMyRequestResponseFactory _factory;

  public MyServiceSample(IMyRequestResponseFactory factory) //dependency injection via constructor
  {
    _factory = factory;
  }

  public MyServiceSample() // WCF poziva default konstruktor, i koristimo default implementaciju

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public class MyRequestResponseFactory : IMyRequestResponseFactory
{
  public TResponse ProcessRequest<TResponse>(Request request, Func<TResponse> handler) 
    where TResponse : Response, new()
  {
    try
    {
      // Validacija request poruke (ovisno o tipu)
      // Autentifikacija korisnika - podaci iz request poruke
      // Autorizacija korisnika - podaci iz request poruke

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public interface IMyRequestResponseFactory
{
  TResponse ProcessRequest<TResponse>(Request request, Func<TResponse> handler)
    where TResponse : Response, new();
}

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[AspNetCompatibilityRequirements(RequirementsMode = AspNetCompatibilityRequirementsMode.Allowed)]

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public class WcfErrorHandler : IErrorHandler
{
  public bool HandleError(Exception error)
  {
    return false;
  }

  public void ProvideFault(Exception error, MessageVersion version, ref Message fault)
  {
    if (error == null)

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public void LogRequest()
{
  if (OperationContext.Current == null) return;

  string msg = String.Empty;
  if (Properties.ContainsKey(RemoteEndpointMessageProperty.Name))
  {
    RemoteEndpointMessageProperty remote =
        Properties[RemoteEndpointMessageProperty.Name] as RemoteEndpointMessageProperty;
    if (remote != null)                

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[WcfErrorHandler] // custom atribut koji imeplementira IErrorHandler, logiranje sistemskih WCF  grešaka
public abstract class WcfBaseService
{
  protected WcfBaseService()
  {
    if (OperationContext.Current == null) return; // ako WCF ne postoji, izađi odmah          
    WcfUtils.LogRequest();            
  }
}

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public class MyServiceSample : WcfBaseService, IMyServiceSample
{
  public DoSomeWorkResponse DoSomeWork(SomeWorkRequest request)
  {
    return new DoSomeWorkResponse();
  }
 
  public DoSomeOtherWorkResponse DoSomeOtherWork(SomeOtherWorkRequest request)
  {
    return new DoSomeOtherWorkResponse();

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[DataContract]
public class Response
{
  [DataMember]
  public List<ResponseError> Errors { get; set; }

  [DataMember]
  public List<string> Warnings { get; set; }

  [DataMember]