private async Task WaitBeforeRetry(int currentRetry, RetryOptions retryOptions)
{
if (currentRetry > 1 && retryOptions.EnableLogging)
{
_logger?.LogInformation(
$"Retrying <Attempt:{currentRetry}> " +
$"Options:{retryOptions.Attempts}" +
$"/{retryOptions.EnableLogging}" +
$"/{retryOptions.DelayBetweenRetries}" +
$"/{retryOptions.DelayBeforeFirstTry}");
}
await Task.Delay(retryOptions.DelayBeforeFirstTry);
}
/// <summary>
/// An extension method to provide Retry functionality for any asynchronous TASK
/// </summary>
/// <param name="task">The extension target type</param>
/// <param name="retryOptions">The options for the retry algorithm</param>
/// <returns>a task responsible for the retry operation</returns>
public static async Task <T> Retry <T>(this Task <T> task, RetryOptions retryOptions = null)
{
retryOptions ??= new RetryOptions();
var tasks = new Queue <Task <T> >();
for (int i = 0; i < retryOptions.Attempts; i++)
{
tasks.Enqueue(task);
}
var currentRetry = 1;
for (;;)
{
try
{
if (currentRetry > 1 && retryOptions.EnableLogging)
{
Trace.TraceInformation($"Retrying attempt {currentRetry}");
}
await Task.Delay(retryOptions.DelayBeforeFirstTry);
var result = await tasks.Dequeue();
return(result);
}
catch (Exception ex)
{
if (retryOptions.EnableLogging)
{
Trace.TraceError(
$"Operation Exception see the inner exception for the details ----> " +
$"Message: {ex.Message} " +
$"Stack: {ex.StackTrace} ");
}
currentRetry++;
if (currentRetry > retryOptions.Attempts ||
retryOptions.DoNotRetryOnTheseExceptionTypes.Any(z => z == ex.GetType()))
{
throw;
}
}
await Task.Delay(retryOptions.DelayBetweenRetries);
}
}
/// <summary>
/// An extension method to provide Retry functionality for any asynchronous TASK
/// </summary>
/// <param name="task">The extension target type</param>
/// <param name="retryOptions">The options for the retry algorithm</param>
/// <returns>a task responsible for the retry operation</returns>
public static async Task Retry(this Action action, RetryOptions retryOptions = null)
{
var tasks = new Queue <Action>();
tasks.Enqueue(action);
tasks.Enqueue(action);
retryOptions ??= new RetryOptions();
var currentRetry = 1;
for (;;)
{
try
{
if (currentRetry > 1 && retryOptions.EnableLogging)
{
Trace.TraceInformation($"Retrying attempt {currentRetry}");
}
await Task.Delay(retryOptions.DelayBeforeFirstTry);
await new Task(tasks.Dequeue());
break;
}
catch (Exception ex)
{
if (retryOptions.EnableLogging)
{
Trace.TraceError(
$"Operation Exception see the inner exception for the details ----> " +
$"Message: {ex.Message} " +
$"Stack: {ex.StackTrace} ");
}
currentRetry++;
if (currentRetry > retryOptions.Attempts ||
retryOptions.DoNotRetryOnTheseExceptionTypes.Any(z => z == ex.GetType()))
{
throw;
}
}
await Task.Delay(retryOptions.DelayBetweenRetries);
}
}
/// <summary>
/// Will retry the given <see cref="Action"/> synchronously
/// </summary>
/// <param name="action">The desired action to be retried with the specified <see cref="RetryOptions"/></param>
/// <param name="retryOptions"><see cref="RetryOptions"/></param>
/// <returns></returns>
public void Retry(Action action, RetryOptions retryOptions = null)
{
retryOptions ??= new RetryOptions();
var currentRetry = 1;
for (;;)
{
try
{
if (currentRetry > 1 && retryOptions.EnableLogging)
{
_logger?.LogInformation($"Retrying attempt {currentRetry} ... ");
}
Task.Delay(retryOptions.DelayBeforeFirstTry).GetAwaiter().GetResult();
action.Invoke();
break;
}
catch (Exception ex)
{
if (retryOptions.EnableLogging)
{
LogException(currentRetry, ex);
}
currentRetry++;
if (currentRetry > retryOptions.Attempts ||
retryOptions.DoNotRetryOnTheseExceptionTypes.Any(z => z == ex.GetType()))
{
throw;
}
}
Task.Delay(retryOptions.DelayBetweenRetries).GetAwaiter().GetResult();
}
}
