IServiceProvider with Autofac and webjob - dependency-injection

Question

I'm working in an Azure webJob.
I'm using autofac with a IJobActivator an everything is ok.
But now, I need to call code that is using IServiceProvider and at that moment I get an error from Autofac because IServiceProvider is not known.
When I'm using the Microsoft.Extensions.DependencyInjection.ServiceCollection() to register my Interfaces in place of Autofac it is working (I don't know where the IServiceProvider is registered but it is working).
The company I work for is asking me to explicitly use Autofac.
I struggle to find to way to use Autofac but declare the IServiceProvider within the WebJob.
Have someone an idea?

Answer 1

I need to call code that is using IServiceProvider and at that moment I get an error from Autofac because IServiceProvider is not known.
Does that mean when running your Webjob, you could not find the IServiceProvider in AutofacActivator.
I am not clear about how do you define IServiceProvider and how do you inject it?
I think you could inject IServiceProvider into job activator and register it then you could use this instance to get service.
You could register the IServiceProvider interface before build in ContainerConfig:
public static class ContainerConfig
{
public static IContainer GetContainer()
{
var builder = new ContainerBuilder();
builder.RegisterType<Functions>();
builder.RegisterType<HelloGenerator>().As<IStringGenerator>().SingleInstance();
builder.Register<IServiceProvider>(context =>
{
var serviceCollection = new ServiceCollection();
//todo: register the interfaces
return serviceCollection.BuildServiceProvider();
}).SingleInstance();
return builder.Build();
}
}
Get service when triggered in Functions:
public class Functions
{
private readonly IStringGenerator _stringGenerator;
private readonly IServiceProvider _serviceProvider;
public Functions(IStringGenerator strGenerator,IServiceProvider serviceProvider)
{
_stringGenerator = strGenerator;
_serviceProvider = serviceProvider;
}
public void ProcessQueueMessage([QueueTrigger("queue")] string message, TextWriter log)
{
log.WriteLine(_stringGenerator.GetWord());
log.WriteLine(_serviceProvider.GetService(xxxxxx));
}
}
In Progtam:
static void Main()
{
var config = new JobHostConfiguration
{
JobActivator = new AutofacActivator(ContainerConfig.GetContainer())
};
var host = new JobHost(config);
host.RunAndBlock();
}
In AutofacActivator:
public class AutofacActivator : IJobActivator
{
private readonly IContainer _container;
public AutofacActivator(IContainer container)
{
_container = container;
}
public T CreateInstance<T>()
{
return _container.Resolve<T>();
}
}
If this is not what you want, hope you could give me more detailed description and your main idea code.

Answer 2

In fact I solved my issue by using Extensions:
using Autofac.Extensions.DependencyInjection;
using Microsoft.Extensions.DependencyInjection;
by using them doing the following:
_containerBuilder = new ContainerBuilder();
_containerBuilder.Populate(new ServiceCollection());
_containerBuilder.RegisterType<MyGreatType>().InstancePerDependency();
_container = _containerBuilder.Build();
It generates automatically the IServiceProvider for you