private static void PerformJobWithFilters(
PerformContext context,
IJobPerformStrategy strategy,
IEnumerable<IServerFilter> filters)
{
var preContext = new PerformingContext(context);
Func<PerformedContext> continuation = () =>
{
strategy.Perform();
return new PerformedContext(context, false, null);
};
var thunk = filters.Reverse().Aggregate(continuation,
(next, filter) => () => InvokePerformFilter(filter, preContext, next));
thunk();
}
public void OnPerforming(PerformingContext filterContext)
{
if (filterContext == null) throw new ArgumentNullException("filterContext");
var cultureName = filterContext
.GetJobParameter<string>("CurrentCulture");
var uiCultureName = filterContext
.GetJobParameter<string>("CurrentUICulture");
var thread = Thread.CurrentThread;
if (!String.IsNullOrEmpty(cultureName))
{
filterContext.Items["PreviousCulture"] = thread.CurrentCulture;
thread.CurrentCulture = CultureInfo.GetCultureInfo(cultureName);
}
if (!String.IsNullOrEmpty(uiCultureName))
{
filterContext.Items["PreviousUICulture"] = thread.CurrentUICulture;
thread.CurrentUICulture = CultureInfo.GetCultureInfo(uiCultureName);
}
}
private static PerformedContext InvokePerformFilter(
IServerFilter filter,
PerformingContext preContext,
Func<PerformedContext> continuation)
{
try
{
filter.OnPerforming(preContext);
}
catch (Exception filterException)
{
throw new JobPerformanceException(
"An exception occurred during execution of one of the filters",
filterException);
}
if (preContext.Canceled)
{
return new PerformedContext(
preContext, true, null);
}
var wasError = false;
PerformedContext postContext;
try
{
postContext = continuation();
}
catch (Exception ex)
{
wasError = true;
postContext = new PerformedContext(
preContext, false, ex);
try
{
filter.OnPerformed(postContext);
}
catch (Exception filterException)
{
throw new JobPerformanceException(
"An exception occurred during execution of one of the filters",
filterException);
}
if (!postContext.ExceptionHandled)
{
throw;
}
}
if (!wasError)
{
filter.OnPerformed(postContext);
}
return postContext;
}