private static bool ReadGloballyDisableMetricsSetting()
{
try
{
var isDisabled = ConfigurationManager.AppSettings["Metrics.CompletelyDisableMetrics"];
return(!string.IsNullOrEmpty(isDisabled) && isDisabled.Equals("TRUE", StringComparison.OrdinalIgnoreCase));
}
catch (Exception x)
{
MetricsErrorHandler.Handle(x, "Invalid Metrics Configuration: Metrics.CompletelyDisableMetrics must be set to true or false");
return(false);
}
}
private void ConfigureHttpListener()
{
try
{
var httpEndpoint = ConfigurationManager.AppSettings["Metrics.HttpListener.HttpUriPrefix"];
if (!string.IsNullOrEmpty(httpEndpoint))
{
WithHttpEndpoint(httpEndpoint);
log.Debug(() => "Metrics: HttpListener configured at " + httpEndpoint);
}
}
catch (Exception x)
{
MetricsErrorHandler.Handle(x, "Invalid Metrics Configuration: Metrics.HttpListener.HttpUriPrefix must be a valid HttpListener endpoint prefix");
}
}
/// <summary>
/// Create HTTP endpoint where metrics will be available in various formats:
/// GET / => visualization application
/// GET /json => metrics serialized as JSON
/// GET /text => metrics in human readable text format
/// </summary>
/// <param name="httpUriPrefix">prefix where to start HTTP endpoint</param>
/// <returns>Chain-able configuration object.</returns>
public MetricsConfig WithHttpEndpoint(string httpUriPrefix)
{
if (!isDisabled)
{
try
{
using (this.listener) { }
this.listener = new MetricsHttpListener(httpUriPrefix, this.context.DataProvider, this.healthStatus);
this.listener.Start();
}
catch (Exception x)
{
MetricsErrorHandler.Handle(x, "Unable to start HTTP Listener");
}
}
return(this);
}
/// <summary>
/// Create HTTP endpoint where metrics will be available in various formats:
/// GET / => visualization application
/// GET /json => metrics serialized as JSON
/// GET /text => metrics in human readable text format
/// </summary>
/// <param name="httpUriPrefix">prefix where to start HTTP endpoint</param>
/// <returns>Chain-able configuration object.</returns>
public MetricsConfig WithHttpEndpoint(string httpUriPrefix)
{
if (!isDisabled)
{
const int MaxRetries = 3;
var retries = MaxRetries;
do
{
try
{
using (this.listener)
{
}
this.listener = new MetricsHttpListener(httpUriPrefix, this.context.DataProvider, this.healthStatus);
this.listener.Start();
if (retries != MaxRetries)
{
log.InfoFormat("HttpListener started successfully after {0} retries", MaxRetries - retries);
}
retries = 0;
}
catch (Exception x)
{
retries--;
if (retries > 0)
{
log.WarnException("Unable to start HTTP Listener. Sleeping for {0} sec and retrying {1} more times", x, MaxRetries - retries, retries);
Thread.Sleep(1000 * (MaxRetries - retries));
}
else
{
MetricsErrorHandler.Handle(x,
string.Format("Unable to start HTTP Listener. Retried {0} times, giving up...", MaxRetries));
}
}
} while (retries > 0);
}
return(this);
}
private void ConfigureCsvReports()
{
try
{
var csvMetricsPath = ConfigurationManager.AppSettings["Metrics.CSV.Path"];
var csvMetricsInterval = ConfigurationManager.AppSettings["Metrics.CSV.Interval.Seconds"];
if (!string.IsNullOrEmpty(csvMetricsPath) && !string.IsNullOrEmpty(csvMetricsInterval))
{
int seconds;
if (int.TryParse(csvMetricsInterval, out seconds) && seconds > 0)
{
WithReporting(r => r.WithCSVReports(csvMetricsPath, TimeSpan.FromSeconds(seconds)));
log.Debug($"Metrics: Storing CSV reports in {csvMetricsPath} every {seconds} seconds.");
}
}
}
catch (Exception x)
{
MetricsErrorHandler.Handle(x, "Invalid Metrics Configuration: Metrics.CSV.Path must be a valid path and Metrics.CSV.Interval.Seconds must be an integer > 0 ");
}
}
public static void Handle(Exception exception)
{
MetricsErrorHandler.Handle(exception, string.Empty);
}