/// <summary>
/// Parses the advice expression.
/// </summary>
/// <param name="adviceExpression">The advice expression.</param>
/// <returns>An instance of ParsedAdviceExpression</returns>
protected virtual ParsedAdviceExpression ParseAdviceExpression(string adviceExpression)
{
ParsedAdviceExpression parsedAdviceExpression = new ParsedAdviceExpression(adviceExpression);
Match match = GetMatch(adviceExpression, OnExceptionNameRegex);
if (match.Success)
{
parsedAdviceExpression.Success = true;
//using exception names for exception filter
parsedAdviceExpression.ExceptionNames = StringUtils.CommaDelimitedListToStringArray(match.Groups[2].Value.Trim());
parsedAdviceExpression.ActionText = match.Groups[3].Value.Trim();
parsedAdviceExpression.ActionExpressionText = match.Groups[4].Value.Trim();
}
else
{
match = GetMatch(adviceExpression, OnExceptionRegex);
if (match.Success)
{
parsedAdviceExpression.Success = true;
//using constratin expression for exception filter
string constraintExpression = match.Groups[2].Value.Trim().Remove(0, 1);
parsedAdviceExpression.ConstraintExpression = constraintExpression.Substring(0, constraintExpression.Length - 1);
parsedAdviceExpression.ActionText = match.Groups[3].Value.Trim();
parsedAdviceExpression.ActionExpressionText = match.Groups[4].Value.Trim();
}
}
return(parsedAdviceExpression);
}
/// <summary>
/// Parses the specified handler string.
/// </summary>
/// <param name="retryExpressionString">The handler string.</param>
/// <returns></returns>
protected virtual RetryExceptionHandler Parse(string retryExpressionString)
{
ParsedAdviceExpression parsedAdviceExpression = ParseAdviceExpression(retryExpressionString);
if (!parsedAdviceExpression.Success)
{
log.Warn("Could not parse retry expression " + retryExpressionString);
return(null);
}
RetryExceptionHandler handler = new RetryExceptionHandler(parsedAdviceExpression.ExceptionNames);
handler.ConstraintExpressionText = parsedAdviceExpression.ConstraintExpression;
handler.ActionExpressionText = parsedAdviceExpression.AdviceExpression;
Match match = GetMatchForActionExpression(parsedAdviceExpression.ActionExpressionText, delayRegex);
if (match.Success)
{
handler.MaximumRetryCount = int.Parse(match.Groups[1].Value.Trim());
handler.IsDelayBased = true;
try
{
string ts = match.Groups[3].Value.Trim();
handler.DelayTimeSpan = (TimeSpan)timeSpanConverter.ConvertFrom(null, null, ts);
} catch (Exception)
{
log.Warn("Could not parse timespan " + match.Groups[3].Value.Trim());
return(null);
}
return(handler);
}
else
{
match = GetMatchForActionExpression(parsedAdviceExpression.ActionExpressionText, rateRegex);
if (match.Success)
{
handler.MaximumRetryCount = int.Parse(match.Groups[1].Value.Trim());
handler.IsDelayBased = false;
handler.DelayRateExpression = match.Groups[3].Value.Trim();
return(handler);
}
else
{
return(null);
}
}
}