Inject NServiceBus with Ninject in WebApi App

Question

I´m trying to send a message to the queue from my WebApi application. The first time the server starts everything goes fine and I can send a message to the queue from my controller, but the next time the action is called it throws the folloowing exception:

Cannot access a disposed object.
Object name: 'UnicastBus'.

This is how I´m binding the IBus interface

public static class NinjectWebCommon
{
    ...
    private static void RegisterServices(IKernel kernel)
    {
        kernel.Bind<IBus>().ToConstant(CreateBus()).InSingletonScope();
    }

    private static IBus CreateBus()
    {
        Configure.Serialization.Xml();
        return Configure.With()
           .DefaultBuilder()
           .UseTransport<Msmq>()
           .UnicastBus()
           .SendOnly();
    }
}

And in my controller

public class CreatedOrderMessageController : ApiController
{
  private readonly IBus bus;

  public CreatedOrderMessageController(IBus bus)
  {
    this.bus = bus;
  }

  public string Get(int id)
  {
    bus.Send(new OrderCreatedMessage(id));
    return "true";
  }
}

Any thoughts on this error?

Thanks

Why are you using the default builder for NSB (which is autofac) and then register it by constant? Try to use the extension method NinjectBuilder and pass in your kernel — Daniel Marbach, Oct 22 '13 at 04:24
Changed to use the NinjectBuilder, now I can send one message like before but on the second try it throws another error: Error loading Ninject component ICache No such component has been registered in the kernel's component container. — Marcio Toshio, Oct 22 '13 at 14:57
Did ypu reference the namedscope and the contextpreservation extension? This is required. Not referencing those will throw this obscure exception — Daniel Marbach, Oct 22 '13 at 17:07
No, I don´t know anything about this extensions, can you tell me more about? — Marcio Toshio, Oct 22 '13 at 17:39
Probably this modules are already been loaded, i try to put this this.kernel.Load(new NamedScopeModule()); this.kernel.Load(new ContextPreservationModule()); and the app throws that the modules are already been loaded — Marcio Toshio, Oct 22 '13 at 17:44
Got it this thread helps me http://stackoverflow.com/questions/11356864/ninject-insingletonscope-with-web-api-rc I was disposing the kernel and this generates issue with singleton scopes — Marcio Toshio, Oct 22 '13 at 18:43
Please create the answer below and accept it to help others, thanks. — Adam Fyles, Oct 23 '13 at 13:25

score 2 · Accepted Answer · edited May 23 '17 at 11:50

I changed de code to use the NinjectBuilder

in the RegisterServices method I used:

Configure.Serialization.Xml();
      Configure.Transactions.Disable();
      Configure.With()
      .NinjectBuilder(kernel)
      .UseTransport<Msmq>()
      .UnicastBus()
      .SendOnly();

And this thread give me a tip Ninject InSingletonScope with Web Api RC

In order to Ninject work with WebApi I needed to implement a custom IDependencyScope I was disposing the kernel and I think it generated a issue with singleton scopes, so in Dispose method in IDependencyScope I do nothing

Inject NServiceBus with Ninject in WebApi App

1 Answers1