public override async Task <FactorialReply> Factorial(FactorialRequest request, ServerCallContext context)
{
// Obtain the number of available threads in ThreadPool
ThreadPool.GetAvailableThreads(out var availableThreads, out _);
// The number of available threads is the example of Gauge metric
// Send gauge metric to StatsD (using JustEat.StatsD nuget)
_stats.Gauge(availableThreads, "GaugeAvailableThreads");
// Increment a counter metric for incoming requests
_stats.Increment("CountRequests");
// The method _stats.Time() will calculate the time while the _semaphoreSlim.WaitAsync() were waiting
// and send the metric to StatsD
await _stats.Time("TimeWait", async f => await _semaphoreSlim.WaitAsync());
try
{
// Again measure time length of calculation and send it to StatsD
var result = await _stats.Time("TimeCalculation", async t => await CalculateFactorialAsync(request.Factor));
// Increment a counter of processed requests
_stats.Increment("CountProcessed");
return(await Task.FromResult(new FactorialReply
{
Result = result
}));
}
finally
{
_semaphoreSlim.Release();
}
}
async Task <FactorialResponse> GetFactorial(FactorialRequest request)
{
var validationResult = this.Validate(request);
if (!validationResult.IsValid)
{
_logger.LogInformation($"Failed to generate factorial for {request.Number}");
return(new FactorialResponse {
Success = false, Errors = validationResult.FormattedErrors
});
}
var result = new FactorialResponse {
Success = true, Factorial = Factorial(request.Number)
};
await _logServiceClient.Post(new LogRequest { Message = $"Generated Factorial for {request.Number}: {result.Factorial}" });
return(result);
}
FactorialResponse GetFactorial(FactorialRequest request)
{
var validationResult = this.Validate(request);
if (!validationResult.IsValid)
{
_logger.LogInformation($"Failed to generate factorial for {request.Number}");
return(new FactorialResponse {
Success = false, Errors = validationResult.FormattedErrors
});
}
var result = new FactorialResponse {
Success = true, Factorial = Factorial(request.Number)
};
_logger.LogInformation($"Generated Factorial for {request.Number}: {result.Factorial}");
return(result);
}