public RequestTimerMiddleware(RequestDelegate next, MetricsOptions options, AspNetMetricsContext metricsContext)
: base(options)
{
if (next == null)
{
throw new ArgumentNullException(nameof(next));
}
if (options == null)
{
throw new ArgumentNullException(nameof(options));
}
_next = next;
_requestTimer = metricsContext.Context.GetWebApplicationContext()
.Timer("Web Requests", Unit.Requests);
}
public PerRequestTimerMiddleware(RequestDelegate next, MetricsOptions options, AspNetMetricsContext metricsContext)
: base(options)
{
if (next == null)
{
throw new ArgumentNullException(nameof(next));
}
if (options == null)
{
throw new ArgumentNullException(nameof(options));
}
if (metricsContext == null)
{
throw new ArgumentNullException(nameof(metricsContext));
}
_next = next;
_metricsContext = metricsContext;
}
public HealthEndpointEndpointMiddleware(RequestDelegate next, MetricsOptions options, AspNetMetricsContext metricsContext)
{
if (next == null)
{
throw new ArgumentNullException(nameof(next));
}
if (options == null)
{
throw new ArgumentNullException(nameof(options));
}
if (metricsContext == null)
{
throw new ArgumentNullException(nameof(metricsContext));
}
_next = next;
_options = options;
_metricsContext = metricsContext;
}
public static IApplicationBuilder UseMetrics(this IApplicationBuilder app, MetricsConfig config, Clock clock)
{
if (app == null)
{
throw new ArgumentNullException(nameof(app));
}
// Verify if AddMetrics was done before calling UseMetrics
// We use the MetricsMarkerService to make sure if all the services were added.
MetricsServicesHelper.ThrowIfMetricsNotRegistered(app.ApplicationServices);
var options = app.ApplicationServices.GetService <IOptions <MetricsOptions> >().Value;
config.WithConfigExtension((ctx, hs) =>
{
var metricsContext = new AspNetMetricsContext(ctx, hs, clock);
// Metrics Endpoint Middleware
app.Use(next => new MetricsEndpointMiddleware(next, options, metricsContext).Invoke);
app.Use(next => new PingEndpointEndpointMiddleware(next, options).Invoke);
app.Use(next => new HealthEndpointEndpointMiddleware(next, options, metricsContext).Invoke);
app.Use(next => new MetricsEndpointTextEndpointMiddleware(next, options, metricsContext).Invoke);
app.Use(next => new MetricsEndpointVisualizationEndpointMiddleware(next, options).Invoke);
// Web Metrics Middleware
app.Use(next => new ErrorRequestMeterMiddleware(next, options, metricsContext).Invoke);
app.Use(next => new OAuth2ClientWebRequestMeterMiddleware(next, options, metricsContext).Invoke);
app.Use(next => new PerRequestTimerMiddleware(next, options, metricsContext).Invoke);
app.Use(next => new RequestTimerMiddleware(next, options, metricsContext).Invoke);
app.Use(next => new ActiveRequestCounterEndpointMiddleware(next, options, metricsContext).Invoke);
app.Use(next => new PostAndPutRequestSizeHistogramMiddleware(next, options, metricsContext).Invoke);
});
UseHealthChecks(app);
return(app);
}
public ActiveRequestCounterEndpointMiddleware(RequestDelegate next, MetricsOptions options, AspNetMetricsContext metricsContext)
: base(options)
{
if (next == null)
{
throw new ArgumentNullException(nameof(next));
}
if (options == null)
{
throw new ArgumentNullException(nameof(options));
}
_next = next;
_activeRequests = metricsContext.Context.GetWebApplicationContext()
.Counter("Active Requests", Unit.Custom("ActiveRequests"));
}
public PostAndPutRequestSizeHistogramMiddleware(RequestDelegate next, MetricsOptions options, AspNetMetricsContext metricsContext)
: base(options)
{
if (next == null)
{
throw new ArgumentNullException(nameof(next));
}
if (options == null)
{
throw new ArgumentNullException(nameof(options));
}
_next = next;
_histogram = metricsContext.Context.GetWebApplicationContext()
.Histogram("Web Request Post & Put Size", Unit.Bytes, SamplingType.Default);
}
