public override void OnException(HttpActionExecutedContext context)
{
var request = context.Request;
var routeTemplate = GetRouteTemplate(request);
ApiMetrics.GetMetrics().Measure.Counter.Increment(new App.Metrics.Counter.CounterOptions
{
Name = "Exception Count",
Tags = new MetricTags(
new string[] { "method", "route", "exception" },
new string[] { request.Method.Method, routeTemplate, context.Exception.GetType().FullName }
)
});
}
public HttpResponseMessage GetMetrics()
{
var formatter = new App.Metrics.Formatters.InfluxDB.MetricsInfluxDbLineProtocolOutputFormatter();
var snapshot = ApiMetrics.GetMetrics().Snapshot.Get();
using (var ms = new MemoryStream())
{
formatter.WriteAsync(ms, snapshot).GetAwaiter();
var result = Encoding.UTF8.GetString(ms.ToArray());
var response = Request.CreateResponse(HttpStatusCode.OK);
response.Content = new StringContent(result, Encoding.UTF8, formatter.MediaType.ContentType);
return(response);
}
}
public async Task <HttpResponseMessage> GetMetricsAsync()
{
var formatter = new App.Metrics.Formatters.Prometheus.MetricsPrometheusTextOutputFormatter();
var snapshot = ApiMetrics.GetMetrics().Snapshot.Get();
using (var ms = new MemoryStream())
{
await formatter.WriteAsync(ms, snapshot);
var result = Encoding.UTF8.GetString(ms.ToArray());
var response = Request.CreateResponse(HttpStatusCode.OK);
response.Content = new StringContent(result, Encoding.UTF8, formatter.MediaType.ContentType);
return(response);
}
}
/// <summary>
/// 停止记录响应时间
/// </summary>
/// <param name="response"></param>
private void EndRecordingResponseTime(string routeTemplate, HttpRequestMessage request, HttpResponseMessage response)
{
var stopwatch = response.RequestMessage.Properties[API_METRICS_RESPONSE_TIME_KEY] as Stopwatch;
ApiMetrics.GetMetrics().Provider.Timer.Instance(new TimerOptions
{
Name = "Response Time",
Tags = new MetricTags(
new string[] { "method", "route", "status" },
new string[] { request.Method.Method, routeTemplate, ((int)response.StatusCode).ToString() }
),
DurationUnit = TimeUnit.Milliseconds,
RateUnit = TimeUnit.Milliseconds,
MeasurementUnit = Unit.Requests
}).Record(stopwatch.ElapsedMilliseconds, TimeUnit.Milliseconds);
response.RequestMessage.Properties.Remove(API_METRICS_RESPONSE_TIME_KEY);
}