Monitoring project state (wait until fully loaded etc.)

[paiden]

Im currently developing an OmniSharp plugin that implements new endpoints for some project analysis actions, that require the whole project to be loaded. E.g. one of this endpoints does a variant of a 'FindAllReferences' operation.

Currently I think I have quite a few problems because of inconsistent project state.

1. If OmniSharp loads a quite large solution and I invoke this endpoint quite early from the client side, no references are found. If I do the exact same call 30 seconds later, it works like a charm.

2. The client sends /fileschanged for various files and project in the solution. Also after that often the new endpoint call delivers inconsistent results for some time.

So my question is how can I implement behavior like this

class MyEndpointHandler : IRequestHandler<Input, Result>
{
   private readonly OmniSharpWorkspace omniWorkspace;
  public async Task<Result> Handle(Input inp)
  {
     await this.workspace.WaitUntilFullyLoaded(); // <--- Is something like this possible
     
    // And now run the logic that requires the fully loaded Roslyn solution
    // Maybe even take a snapshot of the project state beforehand?
    ... 
  }
}

Is this possible at all?
Is there some other issue going on?
Are there viable workarounds?