public T Do <T>(Func <T> func, string actionName = "")
{
var sw = Stopwatch.StartNew();
Started?.Invoke(this, new RetryEventArgs(actionName, TimeSpan.Zero));
var attempt = 0;
while (true)
{
attempt++;
try
{
var result = func();
Success?.Invoke(this, new RetryEventArgs(actionName, sw.Elapsed));
return(result);
}
catch (Exception exc)
{
var eventArgs = new RetryFailureEventArgs(actionName, attempt, sw.Elapsed, exc);
if (attempt < _numAttempts)
{
TransientFailure?.Invoke(this, eventArgs);
_backoff(eventArgs).Wait();
}
else
{
PermanentFailure?.Invoke(this, eventArgs);
throw;
}
}
}
}
public async Task DoAsync(Func <Task> action, string actionName = "")
{
var sw = Stopwatch.StartNew();
Started?.Invoke(this, new RetryEventArgs(actionName, TimeSpan.Zero));
var attempt = 0;
while (true)
{
attempt++;
try
{
await action();
Success?.Invoke(this, new RetryEventArgs(actionName, sw.Elapsed));
break;
}
catch (Exception exc)
{
var eventArgs = new RetryFailureEventArgs(actionName, attempt, sw.Elapsed, exc);
if (attempt < _numAttempts)
{
TransientFailure?.Invoke(this, eventArgs);
await _backoff(eventArgs);
}
else
{
PermanentFailure?.Invoke(this, eventArgs);
throw;
}
}
}
}
private static async Task Backoff(RetryFailureEventArgs retryFailureEventArgs)
{
await Task.Delay(TimeSpan.FromSeconds(retryFailureEventArgs.FailedAttempts));
}
private static async Task Backoff(RetryFailureEventArgs retryFailureEventArgs)
{
await Task.Delay(TimeSpan.FromSeconds(retryFailureEventArgs.FailedAttempts));
}