SimpleInjector | fast Dependency Injection | Dependency Injection library

I want to reuse same class more than once in a chain of decorated objects like this.

InstrumentedTargetDecorator -> ResilientTargetDecorator -> InstrumetedTargetDecorator -> Target

Note that InstrumentedTargetDecorator is used twice here on purpose.

This is how SimpleInjector syntax looks to get the above wired up

I have an object whose constructor requires a primitive. I register it using a delegate (please excuse the contrived example).

The issue is as follows:

I have to access 2 different S3 buckets and the way I have to create AmazonS3clients is as follows:

We currently use SimpleInjector as our DI container to implement the command-query-separation (CQS) pattern by using ICommand and IQuery and ICommandHandler and IQueryHandler interfaces.

We also use the decorator pattern to perform aspect-oriented programming. For one of our decorators we use FluentValidation to perform validation logic for specific commands or queries.

With SimpleInjector, it is possible to conditionally register types. This is useful for our FluentValidation decorator when we have a command or query which does not have a corresponding validator. Then we use a NullValidator as fallback which does nothing. Exactly this scenario is described in the SimpleInjector documentation and looks like this for the FluentValidation scenario:

I would like to get some clarification in regards to how loose the execution timing is for static field initializers in .NET. I'm getting a TypeInitializationException when running the code below in an online compiler(Fiddle), but I get the expected output of 1 in a test console app in VS.

Code:

We have a couple of functions in a function app based on a consumption plan. When I stress test these functions with JMeter (200 threads simultaneously), the functions are throwing SimpleInjector.ActivationException's for about 50% of the time. Not all requests are failing.

I don't get why this is only for a part of the requests.

Call stack:

2021-07-06T08:43:41.159 [Error] Er is een probleem opgetreden

SimpleInjector.ActivationException : The constructor of type GetLocalKeyDataByDateQueryHandler contains the parameter with name 'queryValidator' and type IValidator, but IValidator is not registered. For IValidator to be resolved, it must be registered in the container.at SimpleInjector.Container.ThrowParameterTypeMustBeRegistered(InjectionTargetInfo target)at SimpleInjector.Advanced.DefaultDependencyInjectionBehavior.GetInstanceProducer(InjectionConsumerInfo dependency,Boolean throwOnFailure)at SimpleInjector.ContainerOptions.GetInstanceProducerFor(InjectionConsumerInfo consumer)at SimpleInjector.Registration.BuildConstructorParameters(ConstructorInfo constructor)at SimpleInjector.Registration.BuildNewExpression()at SimpleInjector.Registration.BuildTransientExpression()at SimpleInjector.Registration.BuildTransientDelegate()at SimpleInjector.Lifestyles.ScopedRegistration.BuildExpression()at SimpleInjector.InstanceProducer.BuildExpressionInternal()at SimpleInjector.Internals.LazyEx`1.InitializeAndReturn()at SimpleInjector.InstanceProducer.BuildInstanceCreator()at SimpleInjector.InstanceProducer.BuildAndReplaceInstanceCreatorAndCreateFirstInstance()at SimpleInjector.InstanceProducer.GetInstance()at SimpleInjector.Container.GetInstanceTServiceat async ProRail.PUIC2.Web.Functions.GetPuicDataByChangeDate.Run(GetPuicDataByDate inputParams,ILogger logger,ExecutionContext context) at D:\a\1\s\Src\Web\ProRail.PUIC2.Web.Functions\Functions\GetPuicDataByChangeDate.cs : 35

Function:

Per https://github.com/App-vNext/Polly/wiki/Polly-and-HttpClientFactory#extending-the-convenience-addtransienthttperrorpolicy-definition I can see policies are added with a name.

I have values in my AppConfig like this...

I am trying to use Simple Injector as the DI container for Caliburn.Micro. Demo source: https://github.com/nvstrien/WPFDemos

This project has a basic Caliburn.Micro setup with a Simple Injector Container. The ShellView has 1 button and when pressed, an async method is called to get some simulated data.

I am getting this error in Bootstrapper.Buildup.

SimpleInjector.ActivationException: 'No registration for type SequentialResult could be found. Make sure SequentialResult is registered, for instance by calling 'Container.Register();' during the registration phase. An implicit registration could not be made because Container.Options.ResolveUnregisteredConcreteTypes is set to 'false', which is now the default setting in v5. This disallows the container to construct this unregistered concrete type. For more information on why resolving unregistered concrete types is now disallowed by default, and what possible fixes you can apply, see https://simpleinjector.org/ructd. '

It has been suggested here that commenting out Bootstrapper.BuildUp should work: Caliburn.Micro Bootstrapper 'BuildUp' method throws exception when Simple Injector is used

However, when doing so, SimpleInjector will still throw an exception.

Any help solving this would be greatly appreciated

My complete Bootstrapper config file looks like this: