private RegisteredBackend ResolveBackend(string serviceIdentifier, CancellationToken cancellationToken)
{
while (!cancellationToken.IsCancellationRequested)
{
if (this.backendEndpointIds.TryGetValue(serviceIdentifier, out var backendEndpointIds))
{
if (backendEndpointIds.TryDequeue(out string backendIdentifier))
{
backendEndpointIds.Enqueue(backendIdentifier);
if (this.backendEndpoints.TryGetValue(backendIdentifier, out RegisteredBackend candidateBackend) && candidateBackend.IsConnected)
{
return(this.backendEndpoints[backendIdentifier]);
}
}
}
}
return(null);
}
