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POSharing ServiceStack ICacheClient with SignalR
 

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  1. POSharing ServiceStack ICacheClient with SignalR
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    <p>I'm trying to share the elements in cache between ServiceStack OOB ICacheClient and a SignalR Hub, but I'm getting the following error when I try to get the user session in the OnDisconnected event</p> <blockquote> <p>Only ASP.NET Requests accessible via Singletons are supported</p> </blockquote> <p>I have no issues accessing the session in the OnConnected event, so far this is what I've done:</p> <pre><code>public class HubService:Hub { private readonly IUserRepository _userRepository; private readonly ICacheClient _cacheClient; public HubService(IUserRepository userRepository,ICacheClient cacheClient) { _userRepository = userRepository; _cacheClient = cacheClient; } public override System.Threading.Tasks.Task OnConnected() { var session = _cacheClient.SessionAs&lt;AuthUserSession&gt;(); //Some Code, but No error here return base.OnConnected(); } public override System.Threading.Tasks.Task OnDisconnected() { var session = _cacheClient.SessionAs&lt;AuthUserSession&gt;(); return base.OnDisconnected(); } } </code></pre> <p>I'm using simple injector and my ICacheClient is registered as singleton:</p> <pre><code> Container.RegisterSingle&lt;ICacheClient&gt;(()=&gt;new MemoryCacheClient()); </code></pre> <p>the question is how do I register <strong>requests</strong> as singletons in SS? what am I missing on SignalR event?</p> <p><strong>Edit:</strong></p> <p>what I tried to expain for <em>register requests</em> in SS is because if there's a possibility to register SS IHttpRequest using a container and set the lifestyle as singleton due to the exception message, it seems like httpContext and IHttprequest are null by the OnDisconnected event</p> <p>the SS code is the following:</p> <pre><code>public static string GetSessionId(IHttpRequest httpReq = null) { if (httpReq == null &amp;&amp; HttpContext.Current == null) throw new NotImplementedException(OnlyAspNet); //message httpReq = httpReq ?? HttpContext.Current.Request.ToRequest(); return httpReq.GetSessionId(); } </code></pre> <p>what I'm trying to do is to store a list of connected users using ICacheClient and I just want to remove the connectionID from the list when a user get disconnected.</p> <p><strong>Edit:</strong> it seems like according to <a href="https://stackoverflow.com/questions/10555791/using-simpleinjector-with-signalr/18487801#18487801">danludwig post</a> </p> <blockquote> <p>"There is an interesting thing about SignalR... when a client disconnects from a hub (for example by closing their browser window), it will create a new instance of the Hub class in order to invoke OnDisconnected(). When this happens, HttpContext.Current is null. So if this Hub has any dependencies that are >registered per-web-request, something will probably go wrong."</p> </blockquote> <p>the description above perfectly match my situation </p>
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    1. COI don't think registration will be much different in Simple Injector than with any other container, so if anyone can answer this question for a different container, please do. I will update that answer with Simple Injector details (and upvote). Unfortunately I'm currently unable to answer the question, because I don't know what it means to 'register requests'.
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