private async Task HandleServiceStatusRequest(HttpContext context, IEnumerable <IServiceStatusCheck> serviceStatusChecks)
{
string responsibility = context.Request.Query["responsibility"].ToString() ?? string.Empty;
// Create a queryable list of service status checks
IQueryable <IServiceStatusCheck> checksToMake = serviceStatusChecks.AsQueryable().Where(check => check.IsEnabled());
// If the responsibility string has been set
// filter to only the responsibilities that are requested
if (!string.IsNullOrEmpty(responsibility))
{
checksToMake = checksToMake.Where(x => x.Responsibilities.Any(y => y.Key.Equals(responsibility, StringComparison.OrdinalIgnoreCase)));
}
// No checks to make
if (!checksToMake.Any())
{
context.Response.StatusCode = 404;
}
// Prepare a list of tasks to run through
var checkTasks = checksToMake.ToDictionary(x => x, x => DoServiceCheck(x));
await Task.WhenAll(checkTasks.Values);
// Get the result of service checks in a new dictionary
var checks = checkTasks.ToDictionary(x => x.Key, x => x.Value.Result);
// Initialize the status object that we will be returning
var status = new ServiceStatusDetailed(checks)
{
// Set version of your service
Version = _settings.Value?.Version ?? "0.0.0.0",
Branch = _settings.Value?.Branch ?? null
};
// Validate the status of this service,
// where no CORE responsibilities are allowed to fail
status.ValidateStatus(ResponsibilityTypes.Core);
context.Response.StatusCode = 200;
context.Response.ContentType = "application/json";
await context.Response.WriteAsync(JsonConvert.SerializeObject(status));
}
/// <summary>
/// Evaluate the response from a HTTP service
/// </summary>
/// <param name="response"></param>
/// <returns></returns>
public override async Task <bool> EvaluateResponse(HttpResponseMessage response)
{
if (response.IsSuccessStatusCode)
{
string result = await response.Content.ReadAsStringAsync().ConfigureAwait(false);
ServiceStatusDetailed serviceStatus = JsonConvert.DeserializeObject <ServiceStatusDetailed>(result);
if (serviceStatus?.Responsibilities != null)
{
return(_responsibilities.All(x =>
{
KeyValuePair <string, string> responsibility = serviceStatus.Responsibilities.FirstOrDefault(y => string.Compare(y.Key, x, true) == 0);
return string.Compare(responsibility.Value, StatusTypes.OK, true) == 0;
}));
}
}
return(false);
}
