public ActionResult GetCalculations()
{
try
{
return(Ok(JsonConvert.SerializeObject(calcManager.GetCalulations(10))));
}
catch (Exception ex)
{
logger.Log(LogLevel.Error, ex.Message);
throw new Exception("Failed To Retrieve Calculations From The Underlying Repo");
}
}
private async Task ListenForEvents(WebSocket webSocket)
{
var lastIndexSentToClient = 0; // represents that highest calculation index we have sent to the client
while (webSocket.State == WebSocketState.Open)
{
var latestCalculations = calcManager.GetCalulations(10); // Get the 10 most recent calculations
if (latestCalculations.Count != 0) // if the count is 0, the repo is empty, we don't need to do anything
{
var highestIndexInRepo = latestCalculations.Max(x => x.Index);
if (lastIndexSentToClient < highestIndexInRepo) // If we have an entry in the repo with a higher index then what was last sent to the client, we need to send the data.
{
lastIndexSentToClient = highestIndexInRepo;
var calcAsJson = JsonConvert.SerializeObject(latestCalculations);
var bytes = Encoding.ASCII.GetBytes(calcAsJson);
var arraySegment = new ArraySegment <byte>(bytes);
await webSocket.SendAsync(arraySegment, WebSocketMessageType.Text, true, CancellationToken.None);
}
}
await Task.Delay(500);
}
}