/// <summary>
/// Handles an exception and wraps it into an <see cref="ApplicationModelException"/> of type T as needed.
/// </summary>
/// <typeparam name="T">The type of <see cref="ApplicationModelException"/> to wrap the original exception into.</typeparam>
/// <param name="number">The excpttion number.</param>
/// <param name="ex">The exception.</param>
/// <param name="policyName">The name of the exception policy to apply.</param>
/// <returns>An <see cref="ApplicationModelException"/> of type T.</returns>
public static T HandleException <T>(long number, Exception ex, string policyName)
where T : ApplicationModelException
{
ex.CatchNullArgument("ex");
policyName.CatchNullOrEmptyArgument("policyName");
bool shouldWrap = false;
T outerException = default(T);
// First handle the execption by
// - logging it to the exception log
// - if ex is of type ExceptionWrapper also set the IsUnhandled flag to FALSE
// - if ex is NOT of type ExceptionWrapper then just log the exception
if (ex is ApplicationModelException)
{
ApplicationModelException wrapperException = (ApplicationModelException)ex;
if (wrapperException.IsUnhandled)
{
// Write to exception log
Logger.Write(ex, policyName, TraceLevel.Error);
// Ok ... this is handled
wrapperException.IsUnhandled = false;
}
shouldWrap = typeof(T) != wrapperException.GetType();
if (!shouldWrap)
{
outerException = (T)wrapperException;
}
}
else
{
// Write to exception log
Logger.Write(ex, policyName, TraceLevel.Error);
// Only wrap if we have a different type of exception
shouldWrap = typeof(T) != typeof(Exception);
}
if (shouldWrap)
{
// Create an instance of the requested ExceptionWrapper subtype
outerException = (T)Activator.CreateInstance(typeof(T), new object[] { number, ex.Message, ex });
// If it is a ExceptionWrapper type also set the IsUnhandled flag to FALSE
if (outerException is ApplicationModelException)
{
(outerException as ApplicationModelException).IsUnhandled = false;
}
}
return(outerException);
}
/// <summary>
/// Formats and handles an exception.
/// </summary>
/// <param name="ex">The <see cref="ApplicationModelException"/> to handle.</param>
/// <param name="isExtended">TRUE if the message should be in extended format, FALSE otherwise.</param>
/// <returns>A string message that can be send to client applications.</returns>
public static string FormatServiceException(ApplicationModelException ex, bool isExtended)
{
if (isExtended)
{
return(string.Format(ExceptionHandler.EXCEPTION_FORMAT_EXTENDED, ex.GetType().Name.Humanize(), Enum.Format(typeof(ExceptionNumber), ex.Number, "x"), ex.Number, ex.ID, ex.Message));
}
else
{
return(string.Format(ExceptionHandler.EXCEPTION_FORMAT, ex.GetType().Name.Humanize(), Enum.Format(typeof(ExceptionNumber), ex.Number, "x"), ex.ID));
}
}
/// <summary>
/// Checks if the exception is handled.
/// </summary>
/// <param name="ex">The exception.</param>
/// <returns>TRUE if the exception if the exception has not been handled, FALSE otherwise.</returns>
public static bool IsUnhandledException(Exception ex)
{
bool isUnhandled = true;
if (ex is ApplicationModelException)
{
ApplicationModelException exceptionWrapper = (ApplicationModelException)ex;
isUnhandled = exceptionWrapper.IsUnhandled;
}
return(isUnhandled);
}
/// <summary>
/// Formats and handles an exception.
/// </summary>
/// <param name="ex">The <see cref="ApplicationModelException"/> to handle.</param>
/// <returns>A string message that can be send to client applications.</returns>
public static string FormatServiceException(ApplicationModelException ex)
{
return(ExceptionHandler.FormatServiceException(ex, false));
}
