Using cohost

[shersh]

Is it possible to use this packet without ClientBuilder, when orleans backend is co-hosted with ASP.NET API ?

[stephenlautier]

In our projects we are using this in a generic host orleans and hosted along with an aspnet web similar to this https://github.com/dotnet/orleans/blob/master/Samples/2.3/HealthCheckSample/src/Silo/Program.cs and it does work.

Sometimes after switching to generic host we are getting the following: https://github.com/OrleansContrib/SignalR.Orleans/issues/89 however we use it in production and most of the time it does work, not sure if its related or its misconfiguration on our end tho

[zeus82]

I also trying to use this when an orleans backend is co-hosted with ASP.NET API, but whenever I class IGrainFactory.GetGrain<>, I get an error saying ''System.ArgumentException: 'Cannot find an implementation class for grain interface: IMyGrain. Make sure the grain assembly was correctly deployed and loaded in the silo.'"

If I remove siloBuilder.UseSignalR(), the my GetGrain call works. I can also reproduce the problem with the Co-Host example found here

[srivathsah]

@zeus82 Check if this solves the issue

[xrkraken]

@shersh Have you solved this problem? Can you tell me the solution

[zeus82]

I fixed my issue by adding the following:

siloBuilder.ConfigureApplicationParts(parts => parts.AddApplicationPart(typeof(MyGrain).Assembly).WithReferences());

From what I can tell, you need to do this because SignalR adds itself as an application part.

[xrkraken]

@zeus82 I have this configuration in the code. With the addition of signalr, there is no way to access it. Just remove the code related to signalr. But I can't find the cause of the error at the moment

[zeus82]

Can you share the exact error your getting?

Also, what version of ASP are you using?

[xrkraken]

of course， i'm using asp.net core 3.0，Microsoft.Orleans.CodeGenerator.MSBuild v3.1.6,error:Cannot find an implementation class for grain interface,

[zeus82]

So this doesn't actually work with ASP Core 3, it only works with 2. I have fixed it to work with 3. See this Repo: https://github.com/zeus82/SignalR.Orleans

I opened a PR to update this repo, but I haven't gotten a response... https://github.com/OrleansContrib/SignalR.Orleans/pull/116

Can you also share your silobuilder code?