How to invoke an IApplicationService into a WCF SOAP services in abp Boilerplate?

Question

I developed a MVC application using abp boilerplate and now I have the necessity to expose some services via WFC/SOAP.

The idea is to create a WFC Service, inject the required IApplicationService and use it.

Something like:

// this code does not work
public class MyFirstService : IMyFirstService, ITransientDependency {
    private readonly ICourseAppService _courseAppService;

    // Injection here does not work!
    public MyFirstService(ICourseAppService courseAppService) {
        _courseAppService = courseAppService;
    }

    public CourseDto GetData(int id) {
        return _courseAppService.Get(id);
    }
}

But this code does not work. :-(

The first error I have is from WCF saying the Service does not have a default constructor without parameters. So I am on the wrong way.

How can I inject the service into the SOAP service?

The answer https://stackoverflow.com/a/46048289/752004 did not help me.

Answer 1

Abp uses the Castle Windsor, so following the suggestions from this answer and this article I found the solution.

1. Once imported the nuget package Castle.WcfIntegrationFacility, I created a new WCF library and in it I created a AbbModule class where I registered MyService (defined in pt. 3):

[DependsOn(typeof(BookingCoreModule), typeof(BookingApplicationModule))]
public class BookingSoapModule : AbpModule {

    public override void Initialize() {
        IocManager.RegisterAssemblyByConvention(Assembly.GetExecutingAssembly());

        IocManager.IocContainer.AddFacility<WcfFacility>().Register(
            Component
                .For<IMyService>()
                  .ImplementedBy<MyService>()
                  .Named("MyService")
        );
    }
}

2. Then I created my IMyService interface (note that it extends ITransientDependency):

[ServiceContract]
public interface IMyService : ITransientDependency {
    [OperationContract]
    CourseDto GetCourse(int courseId);
}

3. Finally I implemented the interface with a constructor using injection:

public class MyService : IMySecondService {

    private readonly ICourseAppService _courseAppService;
    public IAbpSession AbpSession { get; set; }
    public ILogger Logger { get; set; }

    public MyService(ICourseAppService courseAppService) {
        AbpSession = NullAbpSession.Instance;
        Logger = NullLogger.Instance;

        _courseAppService = courseAppService;
    }

    public CourseDto GetCourse(int courseId) {
        AsyncHelper.RunSync(async () => {
            var course = await _courseAppService.Get(courseId);
            return course;
        });
    }

}