private static void Sleep(RetryExceptionHandler handler, IDictionary <string, object> callContextDictionary, SleepHandler sleepHandler)
{
if (handler.IsDelayBased)
{
sleepHandler(handler.DelayTimeSpan);
}
else
{
try
{
IExpression expression = Expression.Parse(handler.DelayRateExpression);
object result = expression.GetValue(null, callContextDictionary);
decimal d = decimal.Parse(result.ToString());
decimal rounded = decimal.Round(d * 1000, 0);
TimeSpan duration = TimeSpan.FromMilliseconds(decimal.ToDouble(rounded));
sleepHandler(duration);
}
catch (InvalidCastException e)
{
log.Warn("Was not able to cast expression to decimal [" + handler.DelayRateExpression + "]. Sleeping for 1 second", e);
sleepHandler(new TimeSpan(0, 0, 1));
}
catch (Exception e)
{
log.Warn("Was not able to evaluate rate expression [" + handler.DelayRateExpression + "]. Sleeping for 1 second", e);
sleepHandler(new TimeSpan(0, 0, 1));
}
}
}
/// <summary>
/// Invoked by an <see cref="Spring.Objects.Factory.IObjectFactory"/>
/// after it has injected all of an object's dependencies.
/// </summary>
/// <remarks>
/// <p>
/// This method allows the object instance to perform the kind of
/// initialization only possible when all of it's dependencies have
/// been injected (set), and to throw an appropriate exception in the
/// event of misconfiguration.
/// </p>
/// <p>
/// Please do consult the class level documentation for the
/// <see cref="Spring.Objects.Factory.IObjectFactory"/> interface for a
/// description of exactly <i>when</i> this method is invoked. In
/// particular, it is worth noting that the
/// <see cref="Spring.Objects.Factory.IObjectFactoryAware"/>
/// and <see cref="Spring.Context.IApplicationContextAware"/>
/// callbacks will have been invoked <i>prior</i> to this method being
/// called.
/// </p>
/// </remarks>
/// <exception cref="System.Exception">
/// In the event of misconfiguration (such as the failure to set a
/// required property) or if initialization fails.
/// </exception>
public override void AfterPropertiesSet()
{
if (retryExpression == null)
{
throw new ArgumentException("Must specify retry expression.");
}
RetryExceptionHandler handler = Parse(retryExpression);
if (handler == null)
{
throw new ArgumentException("Was not able to parse retry expression string [" + retryExpression + "]");
}
retryExceptionHandler = handler;
}
/// <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);
}
}
}
private static void Sleep(RetryExceptionHandler handler, IDictionary callContextDictionary, SleepHandler sleepHandler)
{
if (handler.IsDelayBased)
{
sleepHandler(handler.DelayTimeSpan);
}
else
{
try
{
IExpression expression = Expression.Parse(handler.DelayRateExpression);
object result = expression.GetValue(null, callContextDictionary);
decimal d = decimal.Parse(result.ToString());
decimal rounded = decimal.Round(d*1000,0);
TimeSpan duration = TimeSpan.FromMilliseconds(decimal.ToDouble(rounded));
sleepHandler(duration);
}
catch (InvalidCastException e)
{
log.Warn("Was not able to cast expression to decimal [" + handler.DelayRateExpression + "]. Sleeping for 1 second", e);
sleepHandler(new TimeSpan(0,0,1));
}
catch (Exception e)
{
log.Warn("Was not able to evaluate rate expression [" + handler.DelayRateExpression + "]. Sleeping for 1 second", e);
sleepHandler(new TimeSpan(0,0,1));
}
}
}
/// <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;
}
}
}
/// <summary>
/// Invoked by an <see cref="Spring.Objects.Factory.IObjectFactory"/>
/// after it has injected all of an object's dependencies.
/// </summary>
/// <remarks>
/// <p>
/// This method allows the object instance to perform the kind of
/// initialization only possible when all of it's dependencies have
/// been injected (set), and to throw an appropriate exception in the
/// event of misconfiguration.
/// </p>
/// <p>
/// Please do consult the class level documentation for the
/// <see cref="Spring.Objects.Factory.IObjectFactory"/> interface for a
/// description of exactly <i>when</i> this method is invoked. In
/// particular, it is worth noting that the
/// <see cref="Spring.Objects.Factory.IObjectFactoryAware"/>
/// and <see cref="Spring.Context.IApplicationContextAware"/>
/// callbacks will have been invoked <i>prior</i> to this method being
/// called.
/// </p>
/// </remarks>
/// <exception cref="System.Exception">
/// In the event of misconfiguration (such as the failure to set a
/// required property) or if initialization fails.
/// </exception>
public override void AfterPropertiesSet()
{
if (retryExpression == null)
{
throw new ArgumentException("Must specify retry expression.");
}
RetryExceptionHandler handler = Parse(retryExpression);
if (handler == null)
{
throw new ArgumentException("Was not able to parse retry expression string [" + retryExpression + "]");
}
retryExceptionHandler = handler;
}