Polly 在 X 次重试后继续
Polly continue after X retries
我在 Xamarin 项目中使用 Polly,效果非常好。我面临的问题是,在重试 2 次后,它应该继续该方法,但由于某种原因,它卡住了并不断重试。有谁知道我该怎么做?
private async Task<List<EventDto>> GetEventsErrorRemoteAsync()
{
List<EventDto> conferences = null;
if (CrossConnectivity.Current.IsConnected)
{
// Retrying a specific amount of times (5)
// In this case will wait for
// 1 ^ 2 = 2 seconds then
// 2 ^ 2 = 4 seconds then
// 3 ^ 2 = 8 seconds then
// 4 ^ 2 = 16 seconds then
// 5 ^ 2 = 32 seconds
conferences = await Policy
.Handle<Exception>()
.WaitAndRetryAsync(
retryCount: 2,
sleepDurationProvider:retryAttempt =>
TimeSpan.FromSeconds(Math.Pow (2, retryAttempt)),
onRetry: (exception, timeSpan, context) =>
{
var ex = (ApiException)exception;
//Do something with exception. Send to insights (now hockeyapp)
Debug.WriteLine($"Error: {ex.ReasonPhrase} |
TimeSpan: {timeSpan.Seconds}");
return;
}).ExecuteAsync(async () =>
await _eventService.GetEventsWithError());
}
return conferences;
}
关于相同 Github 问题的详细回答问题:https://github.com/App-vNext/Polly/issues/106
政策没有卡住,一直在重试。相反,如果重试策略在 .ExecuteAsync()
内执行委托时所做的最终尝试仍然抛出,则重试策略将重新抛出此最终异常。由于您没有捕获和处理该异常,该方法自然不会继续执行 return 语句。
我在 Xamarin 项目中使用 Polly,效果非常好。我面临的问题是,在重试 2 次后,它应该继续该方法,但由于某种原因,它卡住了并不断重试。有谁知道我该怎么做?
private async Task<List<EventDto>> GetEventsErrorRemoteAsync()
{
List<EventDto> conferences = null;
if (CrossConnectivity.Current.IsConnected)
{
// Retrying a specific amount of times (5)
// In this case will wait for
// 1 ^ 2 = 2 seconds then
// 2 ^ 2 = 4 seconds then
// 3 ^ 2 = 8 seconds then
// 4 ^ 2 = 16 seconds then
// 5 ^ 2 = 32 seconds
conferences = await Policy
.Handle<Exception>()
.WaitAndRetryAsync(
retryCount: 2,
sleepDurationProvider:retryAttempt =>
TimeSpan.FromSeconds(Math.Pow (2, retryAttempt)),
onRetry: (exception, timeSpan, context) =>
{
var ex = (ApiException)exception;
//Do something with exception. Send to insights (now hockeyapp)
Debug.WriteLine($"Error: {ex.ReasonPhrase} |
TimeSpan: {timeSpan.Seconds}");
return;
}).ExecuteAsync(async () =>
await _eventService.GetEventsWithError());
}
return conferences;
}
关于相同 Github 问题的详细回答问题:https://github.com/App-vNext/Polly/issues/106
政策没有卡住,一直在重试。相反,如果重试策略在 .ExecuteAsync()
内执行委托时所做的最终尝试仍然抛出,则重试策略将重新抛出此最终异常。由于您没有捕获和处理该异常,该方法自然不会继续执行 return 语句。