Activities of "shijo"

I managed to Implement IDistributedEventHandler inside BookManager class. Now it is working..

Ok, I will make a small sample and share it with you. One more thing I noticed, I created a new Class inherited from ApplicationService and implemented IDistributedEventHandler, and paste all coding, which is working fine.

The main difference between the two classes is One is inherited from DomainService and The Other is ApplicationService. If you have any clue just check.

public class BookManager : DomainService Inside this class code is throwing exception

public class BookAppDistEventService : ApplicationService, IDistributedEventHandler<APIBookEto> Inside this class code is working fine.

If I am using direct Repository it is working, but here i am going through ApplicationService class. I marked all methods with [UnitOfWork] still no luck.

Yes, It is passing through but the exception is thrown again where DBContext is accessing.

at Microsoft.EntityFrameworkCore.DbContext.CheckDisposed() at Microsoft.EntityFrameworkCore.DbContext.get_ContextServices() at Microsoft.EntityFrameworkCore.DbContext.get_Model() at Microsoft.EntityFrameworkCore.Internal.InternalDbSet1.get_EntityType() at Microsoft.EntityFrameworkCore.Internal.InternalDbSet1.CheckState() at Microsoft.EntityFrameworkCore.Internal.InternalDbSet1.get_EntityQueryable() at Microsoft.EntityFrameworkCore.Internal.InternalDbSet1.System.Linq.IQueryable.get_Provider() at System.Linq.Queryable.Where[TSource](IQueryable1 source, Expression1 predicate) at Akadimi.Books.BookManager.<SetBookAuthorsAsync>d__9.MoveNext() in D:\Akadimi\Akadimi\aspnet-core\src\Akadimi.Domain\Books\BookManager.cs:line 123 at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at System.Runtime.CompilerServices.TaskAwaiter.GetResult() at Akadimi.Books.BookManager.<CreateAsync>d__7.MoveNext() in D:\Akadimi\Akadimi\aspnet-core\src\Akadimi.Domain\Books\BookManager.cs:line 63 at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at System.Runtime.CompilerServices.TaskAwaiter`1.GetResult() at Akadimi.Books.BooksAppService.

    public class BooksAppService: ApplicationService, IBooksAppService, IDistributedEventHandler<APIBookEto>
    {
        private readonly BookManager _bookManager;
        public BooksAppService(BookManager bookManager)
        {
            _bookRepository = bookRepository;
            _bookManager = bookManager;
        }
        public virtual async Task<BookDto> CreateAsync(BookCreateDto input)
        {
            var titles = ObjectMapper.Map<List<BookTranslationCreateDto>, List<BookTranslation>>(input.inputTitles);
            var book = await _bookManager.CreateAsync(
            input.NoOfPages, input.Dimensions, input.ISBN10, input.ISBN13, input.Price, input.PublishDate,
            titles, input.BookLanguageId, input.BookMediaTypeId, input.AuthorIds, input.PublisherIds, input.TagIds, input.FileId
            );
            return ObjectMapper.Map<Book, BookDto>(book);
        }
       [UnitOfWork]
        public virtual Task HandleEventAsync(APIBookEto eventData)
        {
            Task.Run(async () =>
            {
                try
                {
                    var input = ObjectMapper.Map<APIBookEto, BookCreateDto>(eventData);
                    var titles = ObjectMapper.Map<List<BookTranslationCreateDto>, List<BookTranslation>>(input.inputTitles);
            var book = await _bookManager.CreateAsync(
            input.NoOfPages, input.Dimensions, input.ISBN10, input.ISBN13, input.Price, input.PublishDate,
            titles, input.BookLanguageId, input.BookMediaTypeId, input.AuthorIds, input.PublisherIds, input.TagIds, input.FileId
            );
                }
                catch (Exception ex)
                {
                    Console.WriteLine(ex);
                }
            });
            return Task.CompletedTask;
        }
    }

I can explain the scenario. Here above you can see inside BooksAppService class I have a CreateAsync which is basically inserts data into the database. I have already written all logic inside _bookManager.CreateAsync() function. As you can see I am listening distributed event HandleEventAsync, inside this event function I am executing the same logic which is written in CreateAsync. CreateAsync method is calling through API controller which is perfectly working fine and HandleEventAsync(this is already marked as [UnitOfWork]) is calling through RabbitMq and is throwing the above exceptions.

at Autofac.Core.Lifetime.LifetimeScope.ResolveComponent(ResolveRequest request) at Autofac.ResolutionExtensions.TryResolveService(IComponentContext context, Service service, IEnumerable1 parameters, Object& instance) at Autofac.ResolutionExtensions.ResolveOptionalService(IComponentContext context, Service service, IEnumerable1 parameters) at Volo.Abp.DependencyInjection.AbpLazyServiceProvider.<>c__DisplayClass12_0.<LazyGetService>b__0() at Volo.Abp.DependencyInjection.AbpLazyServiceProvider.LazyGetService(Type serviceType) at Volo.Abp.DependencyInjection.AbpLazyServiceProvider.LazyGetService(Type serviceType, Object defaultValue) at Volo.Abp.DependencyInjection.AbpLazyServiceProvider.LazyGetService[T](T defaultValue) at Volo.Abp.Application.Services.ApplicationService.get_GuidGenerator() at Akadimi.Books.BookAppDistEventService.<CreateAsync>d__8.MoveNext() in D:\Akadimi\Akadimi\aspnet-core\src\Akadimi.Application\Books\BookAppDistEventService.cs:line 79 at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at System.Runtime.CompilerServices.TaskAwaiter`1.GetResult() at Akadimi.Books.BookAppDistEventService.<>c__DisplayClass7_0.<

Yes it is working ..

Is it working with ABP Preview 5.3.0.rc.1?

. https://github.com/abpframework/abp-samples/tree/master/ElsaDemo

I am trying to run the abp-samples Elsa project getting a compile error.

1. Create a new MVC Solution (ElsaDemo) with ABP Ver 5.2.2
2. Add Below packages in Web.Host Project
   1. <PackageReference Include="Elsa" Version="2.7" />
   2. <PackageReference Include="Elsa.Activities.Console" Version="2.7" />
   3. <PackageReference Include="Elsa.Activities.Email" Version="2.7" />
   4. <PackageReference Include="Elsa.Activities.Http" Version="2.7" />
   5. <PackageReference Include="Elsa.Activities.Temporal.Quartz" Version="2.7" />
   6. <PackageReference Include="Elsa.Designer.Components.Web" Version="2.7" />
   7. <PackageReference Include="Elsa.Persistence.EntityFramework.SqlServer" Version="2.7" />
3. Build and Run