private ExamSuitContext GetCachedESContext(string userId)
{
ContextInfo ci = cManager.GetAndRemoveESContext(userId);
if (ci == null)
{
return(null);
}
DateTime currentTime = DateTime.Now;
if (currentTime.Subtract(ci.lastUpdatedTime).TotalMinutes > 480) //8 hours
{
return(null);
}
else
{
ExamSuitContext esContext = JsonConvert.DeserializeObject <ExamSuitContext>(ci.jsonString);
return(esContext);
}
}