private static async Task <T> Retry <TException, T>(this Task <T> self, RetryPolicy retryPolicy, Func <Task <T> > retryProc, bool continueOnCapturedContext)
where TException : Exception
{
TException ex;
do
{
try
{
return(await self.ConfigureAwait(continueOnCapturedContext));
}
catch (TException e)
{
ex = e;
await retryPolicy.Delay.ConfigureAwait(continueOnCapturedContext);
self = retryProc();
retryPolicy.IncrementRetryCount();
}
}while (retryPolicy.ShouldRetry);
throw ex;
}
void ValidateRetryPolicyBuiltIn()
{
String clientId = "someClientEntity";
RetryPolicy retry = RetryPolicy.Default;
retry.IncrementRetryCount(clientId);
TimeSpan?firstRetryInterval = retry.GetNextRetryInterval(clientId, new ServerBusyException(string.Empty), TimeSpan.FromSeconds(60));
Log("firstRetryInterval: " + firstRetryInterval);
Assert.True(firstRetryInterval != null);
retry.IncrementRetryCount(clientId);
TimeSpan?secondRetryInterval = retry.GetNextRetryInterval(clientId, new ServerBusyException(string.Empty), TimeSpan.FromSeconds(60));
Log("secondRetryInterval: " + secondRetryInterval);
Assert.True(secondRetryInterval != null);
Assert.True(secondRetryInterval?.TotalMilliseconds > firstRetryInterval?.TotalMilliseconds);
retry.IncrementRetryCount(clientId);
TimeSpan?thirdRetryInterval = retry.GetNextRetryInterval(clientId, new ServerBusyException(string.Empty), TimeSpan.FromSeconds(60));
Log("thirdRetryInterval: " + thirdRetryInterval);
Assert.True(thirdRetryInterval != null);
Assert.True(thirdRetryInterval?.TotalMilliseconds > secondRetryInterval?.TotalMilliseconds);
retry.IncrementRetryCount(clientId);
TimeSpan?fourthRetryInterval = retry.GetNextRetryInterval(clientId, new ServerBusyException(string.Empty), TimeSpan.FromSeconds(60));
Log("fourthRetryInterval: " + fourthRetryInterval);
Assert.True(fourthRetryInterval != null);
Assert.True(fourthRetryInterval?.TotalMilliseconds > thirdRetryInterval?.TotalMilliseconds);
retry.IncrementRetryCount(clientId);
TimeSpan?fifthRetryInterval = retry.GetNextRetryInterval(clientId, new ServerBusyException(string.Empty), TimeSpan.FromSeconds(60));
Log("fifthRetryInterval: " + fifthRetryInterval);
Assert.True(fifthRetryInterval != null);
Assert.True(fifthRetryInterval?.TotalMilliseconds > fourthRetryInterval?.TotalMilliseconds);
retry.IncrementRetryCount(clientId);
TimeSpan?sixthRetryInterval = retry.GetNextRetryInterval(clientId, new ServerBusyException(string.Empty), TimeSpan.FromSeconds(60));
Log("sixthRetryInterval: " + sixthRetryInterval);
Assert.True(sixthRetryInterval != null);
Assert.True(sixthRetryInterval?.TotalMilliseconds > fifthRetryInterval?.TotalMilliseconds);
retry.IncrementRetryCount(clientId);
TimeSpan?seventhRetryInterval = retry.GetNextRetryInterval(clientId, new ServerBusyException(string.Empty), TimeSpan.FromSeconds(60));
Log("seventhRetryInterval: " + seventhRetryInterval);
Assert.True(seventhRetryInterval != null);
Assert.True(seventhRetryInterval?.TotalMilliseconds > sixthRetryInterval?.TotalMilliseconds);
retry.IncrementRetryCount(clientId);
TimeSpan?nextRetryInterval = retry.GetNextRetryInterval(clientId, new EventHubsException(false), TimeSpan.FromSeconds(60));
Assert.True(nextRetryInterval == null);
retry.ResetRetryCount(clientId);
retry.IncrementRetryCount(clientId);
TimeSpan?firstRetryIntervalAfterReset = retry.GetNextRetryInterval(clientId, new ServerBusyException(string.Empty), TimeSpan.FromSeconds(60));
Assert.True(firstRetryInterval.Equals(firstRetryIntervalAfterReset));
retry = RetryPolicy.NoRetry;
retry.IncrementRetryCount(clientId);
TimeSpan?noRetryInterval = retry.GetNextRetryInterval(clientId, new ServerBusyException(string.Empty), TimeSpan.FromSeconds(60));
Assert.True(noRetryInterval == null);
}