/// <summary>
/// Determines the throttling conditions from the specified reason code.
///
/// </summary>
/// <param name="reasonCode">The reason code returned by SQL Database that contains the throttling mode and the exceeded resource types.</param>
/// <returns>
/// An instance of the object holding the decoded reason codes returned from SQL Database when encountering throttling conditions.
/// </returns>
public static ThrottlingCondition FromReasonCode(int reasonCode)
{
if (reasonCode <= 0)
{
return(ThrottlingCondition.Unknown);
}
ThrottlingMode throttlingMode = (ThrottlingMode)(reasonCode & 3);
ThrottlingCondition throttlingCondition = new ThrottlingCondition()
{
ThrottlingMode = throttlingMode
};
int num1 = reasonCode >> 8;
throttlingCondition.throttledResources.Add(
Tuple.Create <ThrottledResourceType, ThrottlingType>(ThrottledResourceType.PhysicalDatabaseSpace,
(ThrottlingType)(num1 & 3)));
int num2;
throttlingCondition.throttledResources.Add(
Tuple.Create <ThrottledResourceType, ThrottlingType>(ThrottledResourceType.PhysicalLogSpace,
(ThrottlingType)((num2 = num1 >> 2) & 3)));
int num3;
throttlingCondition.throttledResources.Add(
Tuple.Create <ThrottledResourceType, ThrottlingType>(ThrottledResourceType.LogWriteIoDelay,
(ThrottlingType)((num3 = num2 >> 2) & 3)));
int num4;
throttlingCondition.throttledResources.Add(
Tuple.Create <ThrottledResourceType, ThrottlingType>(ThrottledResourceType.DataReadIoDelay,
(ThrottlingType)((num4 = num3 >> 2) & 3)));
int num5;
throttlingCondition.throttledResources.Add(
Tuple.Create <ThrottledResourceType, ThrottlingType>(ThrottledResourceType.Cpu,
(ThrottlingType)((num5 = num4 >> 2) & 3)));
int num6;
throttlingCondition.throttledResources.Add(
Tuple.Create <ThrottledResourceType, ThrottlingType>(ThrottledResourceType.DatabaseSize,
(ThrottlingType)((num6 = num5 >> 2) & 3)));
int num7;
throttlingCondition.throttledResources.Add(
Tuple.Create <ThrottledResourceType, ThrottlingType>(ThrottledResourceType.Internal,
(ThrottlingType)((num7 = num6 >> 2) & 3)));
int num8;
throttlingCondition.throttledResources.Add(
Tuple.Create <ThrottledResourceType, ThrottlingType>(ThrottledResourceType.WorkerThreads,
(ThrottlingType)((num8 = num7 >> 2) & 3)));
throttlingCondition.throttledResources.Add(
Tuple.Create <ThrottledResourceType, ThrottlingType>(ThrottledResourceType.Internal,
(ThrottlingType)(num8 >> 2 & 3)));
return(throttlingCondition);
}
/// <summary>
/// Determines the throttling conditions from the specified SQL error.
///
/// </summary>
/// <param name="error">The <see cref="T:System.Data.SqlClient.SqlError"/> object that contains information relevant to a warning or error returned by SQL Server.</param>
/// <returns>
/// An instance of the object that holds the decoded reason codes returned from SQL Database when throttling conditions were encountered.
/// </returns>
public static ThrottlingCondition FromError(SqlError error)
{
if (error != null)
{
Match match = ThrottlingCondition.sqlErrorCodeRegEx.Match(error.Message);
int result;
if (match.Success && int.TryParse(match.Groups[1].Value, out result))
{
return(ThrottlingCondition.FromReasonCode(result));
}
}
return(ThrottlingCondition.Unknown);
}
/// <summary>
/// Determines throttling conditions from the specified SQL exception.
///
/// </summary>
/// <param name="ex">The <see cref="T:System.Data.SqlClient.SqlException"/> object that contains information relevant to an error returned by SQL Server when throttling conditions were encountered.</param>
/// <returns>
/// An instance of the object that holds the decoded reason codes returned from SQL Database when throttling conditions were encountered.
/// </returns>
public static ThrottlingCondition FromException(SqlException ex)
{
if (ex != null)
{
foreach (SqlError error in ex.Errors)
{
if (error.Number == 40501)
{
return(ThrottlingCondition.FromError(error));
}
}
}
return(ThrottlingCondition.Unknown);
}
public bool IsTransient(Exception ex)
{
if (ex != null)
{
SqlException sqlException;
if ((sqlException = ex as SqlException) != null)
{
foreach (SqlError error in sqlException.Errors)
{
switch (error.Number)
{
case 40501:
ThrottlingCondition throttlingCondition = ThrottlingCondition.FromError(error);
sqlException.Data[(object)throttlingCondition.ThrottlingMode.GetType().Name] = (object)throttlingCondition.ThrottlingMode.ToString();
sqlException.Data[(object)throttlingCondition.GetType().Name] = (object)throttlingCondition;
return(true);
case 40540:
case 40613:
case 10928:
case 10929:
case 40143:
case 40197:
case 233:
case 10053:
case 10054:
case 10060:
case 20:
case 64:
return(true);
default:
continue;
}
}
}
else
{
return(ex is TimeoutException);
}
}
return(false);
}
