public BillingCycle FetchOrCreateCurrentBillingCycle()
{
BillingCycle cycle = GetBillingCycle(0);
if (cycle != null)
{
//check that cycle is still current
if (cycle.StartDate.Month != this.GetCurrentTime().Month)
{
cycle = null; //this will invoke cache refresh and creation of new billing cycle
}
}
if (cycle == null) //create a new cycle
{
DalBillingCycle dal = new DalBillingCycle(this, this.storageAccount);
cycle = dal.GetLatestBillingCycle();
if (cycle == null) //create a new cycle, since persisted storage does not contain any cycle
{
DateTime currentDate = this.GetCurrentTime();
DateTime startDate = new DateTime(currentDate.Year, currentDate.Month, 1);
DateTime endDate = new DateTime(currentDate.Year, currentDate.Month, 28); //using 28 since it exists in every month, leap year etc
cycle = new BillingCycle {
Id = Guid.NewGuid(), StartDate = startDate, EndDate = endDate
};
dal.SaveBillingCycle(cycle);
string cacheKey = string.Format("{0}#{1}", cycle.StartDate.Year.ToString(), cycle.StartDate.Month.ToString());
billingCycleCache.AddObject(cacheKey, cycle); //add to cache
}
}
return(cycle);
}
/// <summary>
/// Fetch a given cycle
/// where cycleNumber = 0, implies current billing cycle
/// -1, previous cycle
/// -2, previous to previous and so on
/// </summary>
/// <param name="cycleNumber"></param>
/// <returns></returns>
public BillingCycle GetBillingCycle(int cycleNumber, bool forceCacheRefresh)
{
if (cycleNumber > 0 || cycleNumber < -11)
{
throw new ArgumentException("Cycles from current to last 1 year are supported");
}
int currentMonth = this.GetCurrentTime().Month;
//since cycle number is counted -ve backwards, so need to add to current month
int requestedCycleMonth = currentMonth + cycleNumber;
int requestedYear = this.GetCurrentTime().Year;
if (requestedCycleMonth < 1)
{
//wrap around of 1 year
requestedCycleMonth += 12;
requestedYear--;
}
string cacheKey = string.Format("{0}#{1}", requestedYear, requestedCycleMonth);
BillingCycle cycle = billingCycleCache.GetObject(cacheKey) as BillingCycle;
if (cycle == null || forceCacheRefresh)
{
//fetch from table storage
DalBillingCycle dal = new DalBillingCycle(this, this.storageAccount);
cycle = dal.GetBillingCycle(requestedYear, requestedCycleMonth);
}
if (cycle != null) //add to cache
{
billingCycleCache.AddObject(cacheKey, cycle);
}
else if (forceCacheRefresh)
{
//dummy up the cache entry simulating discarding the entry
billingCycleCache.AddObject(cacheKey, "dummy");
}
return(cycle);
}
public bool UpdateBillingCycleStatus(int year, int month, int status)
{
DalBillingCycle dal = new DalBillingCycle(this, this.storageAccount);
return(dal.UpdateBillingCycleStatus(year, month, status));
}
