private static bool IsTransient(RetryOnExceptionContext context, Exception exception)
{
if (context.TransientExceptionTypes == null)
{
return(false);
}
return(context.TransientExceptionTypes.Contains(exception.GetType()));
}
public static async Task ActionAsync(RetryOnExceptionContext context, Func <CancellationToken, Task> operation)
{
if (context == null)
{
throw new ArgumentNullException(nameof(context));
}
if (operation == null)
{
throw new ArgumentNullException(nameof(operation));
}
var attempts = 0;
do
{
if (!context.Token.IsCancellationRequested)
{
try
{
attempts++;
await operation(context.Token);
break;
}
catch (Exception e)
{
if (!IsTransient(context, e))
{
throw;
}
if (attempts == context.Policy.Times)
{
throw;
}
var delay = context.Policy.GetDelay(attempts);
Log.Warn($"Exception on attempt {attempts} of {context.Policy.Times}. Will retry after {delay}", e);
await Task.Delay(delay, context.Token);
}
}
}while (true);
}
public static void Action(RetryOnExceptionContext context, Action <CancellationToken> operation)
{
if (context == null)
{
throw new ArgumentNullException(nameof(context));
}
if (operation == null)
{
throw new ArgumentNullException(nameof(operation));
}
var attempts = 0;
do
{
try
{
attempts++;
operation(context.Token);
break;
}
catch (Exception e)
{
if (!IsTransient(context, e))
{
throw;
}
if (attempts == context.Policy.Times)
{
throw;
}
var delay = context.Policy.GetDelay(attempts);
Log.Warn($"Exception on attempt {attempts} of {context.Policy.Times}. Will retry after {delay}", e);
Task.Delay(delay, context.Token).Wait(context.Token);
}
}while (true);
}
