// This method is invoked frequently from KEDA to retrieve the metric. The value we return here is from the 'state' variable
// which is set by the Client_OnMessageReceived above.
public override Task <GetMetricsResponse> GetMetrics(GetMetricsRequest request, ServerCallContext context)
{
_logger.LogInformation($"{DateTime.Now} GetMetrics Called: state: {state}");
var response = new GetMetricsResponse();
response.MetricValues.Add(new MetricValue {
MetricName = "kaboom", MetricValue_ = state
});
return(Task.FromResult <GetMetricsResponse>(response));
}
public override async Task <GetMetricsResponse> GetMetrics(GetMetricsRequest request, ServerCallContext context)
{
_logger.LogInformation($"Namespace: {request?.ScaledObjectRef?.Namespace} DeploymentName: {request?.ScaledObjectRef?.Name} GetMetrics() called.");
int currentWorkerCount =
await GetCurrentWorkerCountAsync(request.ScaledObjectRef.Namespace, request.ScaledObjectRef.Name);
var heartbeat = await _performanceMonitorRepository.PulseAsync(currentWorkerCount);
int targetSize = 0;
switch (heartbeat.ScaleRecommendation.Action)
{
case ScaleAction.AddWorker:
targetSize = currentWorkerCount + 1;
targetSize = targetSize * MLTIPLICITY;
_logger.LogDebug($"Namespace: {request?.ScaledObjectRef?.Namespace} DeploymentName: {request?.ScaledObjectRef?.Name} GetMetrics() : AddWorker : Target: {targetSize}");
break;
case ScaleAction.RemoveWorker:
targetSize = currentWorkerCount - 1;
targetSize = targetSize * MLTIPLICITY - (MLTIPLICITY - 1);
_logger.LogDebug($"Namespace: {request?.ScaledObjectRef?.Namespace} DeploymentName: {request?.ScaledObjectRef?.Name} GetMetrics() : RemoveWorker : Target: {targetSize}");
break;
default:
targetSize = currentWorkerCount;
targetSize = targetSize * MLTIPLICITY;
_logger.LogDebug($"Namespace: {request?.ScaledObjectRef?.Namespace} DeploymentName: {request?.ScaledObjectRef?.Name} GetMetrics() : None : Target: {targetSize}");
break;
}
var res = new GetMetricsResponse();
var metricValue = new MetricValue
{
MetricName = ScaleRecommendation,
MetricValue_ = targetSize
};
res.MetricValues.Add(metricValue);
return(res);
}
public override async Task <GetMetricsResponse> GetMetrics(GetMetricsRequest request, ServerCallContext context)
{
if (!request.ScaledObjectRef.ScalerMetadata.ContainsKey("latitude") ||
!request.ScaledObjectRef.ScalerMetadata.ContainsKey("longitude"))
{
throw new ArgumentException("longitude and latitude must be specified");
}
var longitude = request.ScaledObjectRef.ScalerMetadata["longitude"];
var latitude = request.ScaledObjectRef.ScalerMetadata["latitude"];
var earthquakeCount = await GetEarthQuakeCount(longitude, latitude, 1.0);
var resp = new GetMetricsResponse();
resp.MetricValues.Add(new MetricValue
{
MetricName = "earthquakeThreshold",
MetricValue_ = earthquakeCount
});
return(resp);
}
public override async Task <GetMetricsResponse> GetMetrics(GetMetricsRequest request, ServerCallContext context)
{
_logger.LogInformation($"GetMetrics: about to call service: {_urlOfService}");
var httpRequest = new HttpRequestMessage(HttpMethod.Get, _urlOfService);
var client = _httpClientFactory.CreateClient();
var response = await client.SendAsync(httpRequest);
int result = 30;
string responseContent = await response.Content.ReadAsStringAsync();
_logger.LogInformation($"GetMetrics: response was: {responseContent}");
int.TryParse(responseContent, out result);
var metricResponse = new GetMetricsResponse();
metricResponse.MetricValues.Add(new MetricValue
{
MetricName = "mymetric",
MetricValue_ = result
});
return(metricResponse);
}
