How to get access to the Autofac LifetimeScope that wraps the consumer.

[Gert Jansen van Rensburg]

I am trying to configure something verify similar to Tranaction,

trying to create middleware except I dont have access to the lifetimescope that is wrapped around the consumer.

public class UnitOfWorkFilter<T> : IFilter<T>

        where T : class, PipeContext

    {

        public void Probe(ProbeContext context)

        {

            context.CreateFilterScope("unit-of-work");

        }

        public async Task Send(T context, IPipe<T> next)

        {

            var scope = context.GetPayload<ILifetimeScope>();

            var uow = scope.Resolve<IUnitOfWork>();

            try

            {

                await next.Send(context);

                await uow.Complete();

            }

            catch

            {

                await uow.Abandon();

                throw;

            }

        }

    } 

At this point looks like I would have to fork MassTransit.AutofacIntegration and alter the AutofacConsumerFactory 

public async Task Send<TMessage>(ConsumeContext<TMessage> context, IPipe<ConsumerConsumeContext<TConsumer, TMessage>> next)

            where TMessage : class

        {

            using (ILifetimeScope innerScope = context.GetOrAddPayload(() => _scope.BeginLifetimeScope(_name)))

            {

                var uow = innerScope.Resolve<IUnitOfWork>();

    

                var consumer = innerScope.Resolve<TConsumer>();

                if (consumer == null)

                {

                    throw new ConsumerException($"Unable to resolve consumer type '{TypeMetadataCache<TConsumer>.ShortName}'.");

                }

                try

                {

                    await next.Send(context.PushConsumer(consumer)).ConfigureAwait(false);

                    await uow.Complete().ConfigureAwait(false);

                }

                catch

                {

                    await uow.Abandon().ConfigureAwait(false);

                    throw;

                }

            }

        }

[Chris Patterson]

Pretty sure the current lifetime scope is always available in Autofac but just adding ILifetimeScope to the constructor. It's always ambient within the current container lifetime scope.

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[Chris Patterson]

Oh, right, you want the filter to be able to access it. Yeah, that's a bit more complicated.

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[Daniel Little]

I'm interested in this too, it appears there's no good way to carry the LifetimeScope with the context