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PONamedScopes Ninject bindings and async (threading)
 

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    <p>My project is structured by services and repositories (all repositories share the db context). In one of my service layers, I have an asynchronous method that writes to the database using a repository. The web request will finish and dispose of the context before this method can get to use it. I tried to understand <a href="http://www.planetgeek.ch/2010/12/08/how-to-use-the-additional-ninject-scopes-of-namedscope/" rel="nofollow noreferrer">NamedScopes</a> as stated in this <a href="https://stackoverflow.com/a/10669539/400861">answer</a>. I still can't seem to understand how to implement it. I'll show how my project is structured and hope someone can help me at the code level.</p> <p><strong>Bindings</strong></p> <pre><code> private static void RegisterServices(IKernel kernel) { //dbcontext kernel.Bind&lt;EntityDatabaseContext&gt;().ToMethod(context =&gt; new EntityDatabaseContext()).InRequestScope(); //unit of work kernel.Bind&lt;IUnitOfWork&gt;().To&lt;UnitOfWork&gt;().InRequestScope(); //repositories kernel.Bind&lt;IRepository&lt;Account&gt;&gt;().To&lt;Repository&lt;Account&gt;&gt;().InRequestScope(); //services kernel.Bind&lt;IAuthenticationService&gt;().To&lt;AuthenticationService&gt;().InRequestScope(); } </code></pre> <p><strong>AuthenticationService uses constructor injection</strong></p> <pre><code>public AuthenticationService(UnitOfWork unitOfWork, IRepository&lt;Account&gt; accountRepository){} </code></pre> <p><strong>A method inside my AuthenticationService</strong></p> <pre><code> //this is a background process public Task SomeMethodAsync(string text) { //spin it off into a new task return Task.Factory.StartNew(() =&gt; SomeMethod(text)); } </code></pre> <p><code>SomeMethod</code> makes use of <code>accountRepository</code>. Please tell me if anymore information is needed. Please help me with the threading issue, if NamedScopes is the solution, how do I implement it in my case? </p> <p>Basically, a background process is being executed and it is using a context that is being disposed of by ninject due to the request scope.</p>
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    1. COCould you please elaborate what you want to achieve? Do you simply want to load some data in your method SomeMethodAsync asynchronously or do you want to background process some information in a job like fashion? One major problem in your design is, that your are starting directly a new task in SomeMethodAsync. Starting a new task gives no promise about the task execution. The tasks might be executed after your request has ended and then ninject will already have disposed in request scope. If you use AsyncController the task should be registered on it. But the API should not start it
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    2. CO@DanielMarbach That is my problem, the task may be executed after the request ends and ninject disposes of the context. I need to tell ninject to wait. Not sure how to do this.
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    3. CO@DanielMarbach what do you mean the API should not start it?
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