How to configure Ninject in call scope binding within Azure Web Job? - dependency-injection

Question

I am facing a problem when try to write a web job scheduler. I am using Ninject scope binding using EF Repository pattern. But Only InSingletonScope() work as expected. How to configure it in RequestScope Or Call Scope ?
//Register Context
Kernel.Bind<MyDbContext>().ToSelf().InSingletonScope();
Kernel.Bind<IUnitOfWork<MyDbContext>>().To<UnitOfWork<MyDbContext>>().InSingletonScope();

Answer 1

Problem Solved From One of My Previous Post
I am posting Step By Step Solution
(1.) NinjectJobActivator
public class NinjectJobActivator : IJobActivator
{
#region Variable Declaration
private readonly IResolutionRoot _resolutionRoot;
#endregion
#region CONSTRUCTOR
/// <summary>
///
/// </summary>
/// <param name="kernel"></param>
// public NinjectJobActivator(IKernel kernel)
public NinjectJobActivator(IResolutionRoot resolutionRoot)
{
_resolutionRoot = resolutionRoot;
}
#endregion
#region CreateInstance
/// <summary>
///
/// </summary>
/// <typeparam name="T"></typeparam>
/// <returns></returns>
public T CreateInstance<T>()
{
return _resolutionRoot.Get<T>(new CallScopedParameter());
}
#endregion
}
(2) NinjectBindings
using Ninject.Extensions.Conventions;
using Ninject.Extensions.NamedScope;
public class NinjectBindings : NinjectModule
{
public override void Load()
{
//Register Context
Kernel.Bind<MyDbContext>().ToSelf()
.When(x => x.Parameters.OfType<CallScopedParameter>().Any())
.InCallScope(); // For Scheduler
Kernel.Bind<IUnitOfWork<MyDbContext>>().To<UnitOfWork<MyDbContext>>();
//Register Repository
Kernel.Bind(x => x
.FromAssemblyContaining<MyDbContext>()
.SelectAllClasses()
.InheritedFrom(typeof(IRepository<>))
.BindDefaultInterface());
}
}
(3) Program.cs
static void Main()
{
using (IKernel kernel = new StandardKernel(new NinjectBindings()))
{
var config = new JobHostConfiguration()
{
JobActivator = new NinjectJobActivator(kernel)
};
if (config.IsDevelopment)
{
config.UseDevelopmentSettings();
}
// Timer Trigger
config.UseTimers();
var host = new JobHost(config);
//// The following code ensures that the WebJob will be running continuously
host.RunAndBlock();
}
}
(4) CallScopedParameter
public sealed class CallScopedParameter : IParameter
{
/// <summary>
///
/// </summary>
/// <param name="other"></param>
/// <returns></returns>
public bool Equals(IParameter other)
{
if (other == null)
{
return false;
}
return other is CallScopedParameter;
}
/// <summary>
///
/// </summary>
/// <param name="context"></param>
/// <param name="target"></param>
/// <returns></returns>
public object GetValue(IContext context, ITarget target)
{
throw new NotSupportedException("this parameter does not provide a value");
}
/// <summary>
///
/// </summary>
public string Name
{
get { return typeof(CallScopedParameter).Name; }
}
/// <summary>
/// this is very important
/// </summary>
public bool ShouldInherit
{
get { return true; }
}
}
(5) Azure Web Job Function
public void DoSomething([TimerTrigger("*/30 * * * * *")] TimerInfo timer, TextWriter log)
{
try
{
var tempdetails = _sampleRepository.SearchFor(x=> DateTime.UtcNow > x.DateTo);
foreach (var detail in tempdetails)
{
if (detail.ID == 2)
{
detail.ID = 5;
}
_sampleRepository.Update(detail);
}
_unitOfWork.Commit();
}
catch (Exception ex)
{
log.WriteLine(ex.Message);
}
}