private static void EnsureHealthAdded(IApplicationBuilder app)
{
if (app == null)
{
throw new ArgumentNullException(nameof(app));
}
// Verify if AddHealth was done before calling using middleware.
// We use the HealthMarkerService to make sure if all the services were added.
AppMetricsHealthServicesHelper.ThrowIfMetricsNotRegistered(app.ApplicationServices);
}
/// <summary>
/// Adds App Metrics Health Checks Middleware to the <see cref="T:Microsoft.AspNetCore.Builder.IApplicationBuilder" /> request
/// execution pipeline.
/// </summary>
/// <param name="app">The <see cref="T:Microsoft.AspNetCore.Builder.IApplicationBuilder" />.</param>
/// <returns>A reference to this instance after the operation has completed.</returns>
/// <exception cref="ArgumentNullException">
/// <see cref="T:Microsoft.AspNetCore.Builder.IApplicationBuilder" /> cannot be null
/// </exception>
public static IApplicationBuilder UseHealthChecks(this IApplicationBuilder app)
{
if (app == null)
{
throw new ArgumentNullException(nameof(app));
}
// Verify if AddHealthChecks was done before calling UseHealthChecks
// We use the HealthCheckMarkerService to make sure if all the services were added.
AppMetricsHealthServicesHelper.ThrowIfHealthChecksNotRegistered(app.ApplicationServices);
var aspNetMetricsMiddlewareHealthChecksOptions = app.ApplicationServices.GetRequiredService<AppMetricsMiddlewareHealthChecksOptions>();
if (aspNetMetricsMiddlewareHealthChecksOptions.HealthEndpointEnabled)
{
HealthServicesHelper.ThrowIfHealthChecksNotRegistered(app.ApplicationServices);
app.UseMiddleware<HealthCheckEndpointMiddleware>();
}
return app;
}
