Activation error occurred while trying to get instance of type IBackupTableStorageService, key "" StructureMap library - inversion-of-control

Question

I am facing issue of mapping. My solution is as below.
I have two projects
1. Azure Function (v1) project with Framework: .Net Framework 4.7.2
2. Class Library with Framework: .Net Framework 4.7.2
In 1st project i have an azure function which is triggering using Queue and call my function BeginBackup(CancellationToken token, DateTime.Now()) which exist in my concreate class.
I am calling my function as below from my Azure function.
DependencyContext.Instance.Locator.GetInstance<IBackupTableStorageService>().BeginBackup(cancellationToken, SystemTime.UtcNow());
My DependencyContext.cs class is below.
using ClassLibrary1.BackupTableStorage;
using CommonServiceLocator;
using StructureMap;
using System;
using System.Collections.Generic;
namespace AzureFunctionsProject.Functions
{
public interface IDependencyContext
{
IServiceLocator Locator { get; }
}
public class DependencyContext : IDependencyContext
{
private static volatile IDependencyContext _instance;
private static readonly object SyncRoot = new Object();
public static IDependencyContext Instance
{
get
{
if (_instance == null)
{
lock (SyncRoot)
{
if (_instance == null)
{
_instance = new DependencyContext();
}
}
}
return _instance;
}
set => _instance = value;
}
public IServiceLocator Locator { get; private set; }
public DependencyContext()
{
Build();
}
private void Build()
{
var registry = new Registry();//Registry is the class belongs to StructureMap.
var container = new Container();
var serviceLocatorProvider = new StructureMapServiceLocator(container);
ServiceLocator.SetLocatorProvider(() => serviceLocatorProvider);
Locator = serviceLocatorProvider;
// register the container itself
registry.For<IServiceLocator>().Use(ServiceLocator.Current);
// Apply the registry to the container
container.Configure(x =>
{
x.AddRegistry<Domain.Registry>();
x.AddRegistry(registry);
});
}
}
public class StructureMapServiceLocator : ServiceLocatorImplBase
{
private IContainer Container { get; set; }
public StructureMapServiceLocator(IContainer container)
{
Container = container;
}
protected override object DoGetInstance(Type serviceType, string key)
{
if (string.IsNullOrEmpty(key))
{
return Container.GetInstance(serviceType);
}
return Container.GetInstance(serviceType, key);
}
protected override IEnumerable<object> DoGetAllInstances(Type serviceType)
{
foreach (object obj in Container.GetAllInstances(serviceType))
{
yield return obj;
}
}
}
}
I have another Registery class which i have created which have mapping of my interface with my concrete class.
Registery.cs file is below.
namespace ClassLibrary1.Domain
{
public class Registry: StructureMap.Registry
{
public Registry()
{
// The Localization Service needs to be passed a function to record exceptions
For<ILocalizationService>().Use<LocalizationService>()
.Ctor<LocalizationService.LogException>().Is(context => CreateExceptionLogger(context));
For<ICloudStorageWrapper>().Use<CloudStorageWrapper>();
For<IBackupTableStorageService>().Use<BackupTableStorageService>();
}
private LocalizationService.LogException CreateExceptionLogger(IContext context)
{
return (ex, c, m) =>
{
var logger = context.GetInstance<ILogicalOperationsLogger>();
logger.ErrorException(m, ex);
};
}
}
}
Like wise i have my Interface and respected to concreate class which has the definition of my method BeginBackup(CancellationToken token, DateTime.Now());
I am getting exception in DoGetInstance method in DependencyContext.cs class.
I am new in IoC and dependency injection, please let me know what i am doing wrong, if anything required to make question more clear please let me know.

Answer 1

Try to move the registration for IServiceLocator into the configure action. You can also remove the Registry-object you created:
private void Build()
{
var container = new Container();
var serviceLocatorProvider = new StructureMapServiceLocator(container);
ServiceLocator.SetLocatorProvider(() => serviceLocatorProvider);
Locator = serviceLocatorProvider;
// Apply the registry to the container
container.Configure(x =>
{
// register the container itself
x.For<IServiceLocator>().Use(serviceLocatorProvider);
x.AddRegistry<Domain.Registry>();
});
}