public static R LogStartEndAndElapsedTime <T, R>(this ILogger <T> logger,
EventIds startEventId,
EventIds completedEventId,
string messageFormat,
Func <R> func,
params object[] messageArguments)
{
logger.LogInformation(startEventId.ToEventId(), messageFormat, messageArguments);
var stopwatch = new Stopwatch();
stopwatch.Start();
try
{
return(func());
}
finally
{
stopwatch.Stop();
logger.LogInformation(completedEventId.ToEventId(),
messageFormat + " Elapsed {Elapsed}",
messageArguments.Concat(new object[] { stopwatch.Elapsed }).ToArray());
}
}
public static async Task <TResult> LogStartEndAndElapsedTimeAsync <T, TResult>(this ILogger <T> logger,
EventIds startEventId,
EventIds completedEventId,
string messageFormat,
Func <Task <TResult> > func,
params object[] messageArguments)
{
logger.LogInformation(startEventId.ToEventId(), messageFormat, messageArguments);
var stopwatch = new Stopwatch();
stopwatch.Start();
var result = await func();
stopwatch.Stop();
logger.LogInformation(completedEventId.ToEventId(),
messageFormat + " Elapsed {Elapsed}",
messageArguments.Concat(new object[] { stopwatch.Elapsed }).ToArray());
return(result);
}
public static IAsyncPolicy <HttpResponseMessage> GetRetryPolicy(ILogger logger, string requestType, EventIds eventId, int retryCount, double sleepDuration)
{
return(Policy
.HandleResult <HttpResponseMessage>(r => r.StatusCode == HttpStatusCode.ServiceUnavailable)
.OrResult(r => r.StatusCode == HttpStatusCode.TooManyRequests)
.OrResult(r => r.StatusCode == HttpStatusCode.InternalServerError && requestType == "File Share")
.WaitAndRetryAsync(retryCount, (retryAttempt) =>
{
return TimeSpan.FromSeconds(Math.Pow(sleepDuration, (retryAttempt - 1)));
}, async(response, timespan, retryAttempt, context) =>
{
var retryAfterHeader = response.Result.Headers.FirstOrDefault(h => h.Key.ToLowerInvariant() == "retry-after");
var correlationId = response.Result.RequestMessage.Headers.FirstOrDefault(h => h.Key.ToLowerInvariant() == "x-correlation-id");
int retryAfter = 0;
if (response.Result.StatusCode == HttpStatusCode.TooManyRequests && retryAfterHeader.Value != null && retryAfterHeader.Value.Any())
{
retryAfter = int.Parse(retryAfterHeader.Value.First());
await Task.Delay(TimeSpan.FromMilliseconds(retryAfter));
}
logger
.LogInformation(eventId.ToEventId(), "Re-trying {requestType} service request with uri {RequestUri} and delay {delay}ms and retry attempt {retry} with _X-Correlation-ID:{correlationId} as previous request was responded with {StatusCode}.",
requestType, response.Result.RequestMessage.RequestUri, timespan.Add(TimeSpan.FromMilliseconds(retryAfter)).TotalMilliseconds, retryAttempt, correlationId.Value, response.Result.StatusCode);
}));
}