Added Polly code for retry logging

Author: bartczernicki

.vs/MachineIntelligence-TPLDataFlows/DesignTimeBuild/.dtbcache.v2

@@ -1,4 +1,5 @@
-using Polly;
+using Microsoft.Extensions.Logging;
+using Polly;
 using Polly.Extensions.Http;
 using System;
 using System.Net.Http;
@@ -11,8 +12,15 @@ public static Polly.Retry.AsyncRetryPolicy<HttpResponseMessage> GetRetryPolicy()
  {
  var retryPolicy = HttpPolicyExtensions
  .HandleTransientHttpError() // HttpRequestException, 5XX and 408
+ .OrResult(response => response.StatusCode == System.Net.HttpStatusCode.NotFound) // Handle NotFound 404
  .OrResult(response => response.StatusCode == System.Net.HttpStatusCode.TooManyRequests) // Handle too many requests 429
- .WaitAndRetryAsync(4, retryAttempt => TimeSpan.FromSeconds(Math.Pow(3, retryAttempt)));
+ .WaitAndRetryAsync(4, retryAttempt => TimeSpan.FromSeconds(Math.Pow(3, retryAttempt)),
+ onRetry: (response, calculatedWaitDuration) =>
+ {
+ Console.WriteLine($"Failed attempt. Waited for {calculatedWaitDuration}");// Retrying. {response.Exception.Message} - {response.Exception.StackTrace}");
+ }
+ );
+ 
 
  return retryPolicy;
  }