/// <summary>
/// Builds the allocation chain following the GAM interval
/// </summary>
private async Task BuildAllocationChain(AllocationMap allocationMap,
int databaseId,
PageAddress pageAddress,
int fileSize)
{
var allocationPage = await GetAllocationPage(databaseId, pageAddress);
if (allocationPage.Header.PageType == PageType.Iam)
{
throw new ArgumentException();
}
allocationMap.Pages.Add(allocationPage);
var interval = AllocationMap.Interval;
var pageCount = (int)Math.Ceiling(fileSize / (decimal)interval);
if (pageCount > 1)
{
for (var i = 1; i < pageCount; i++)
{
var allocationAddress = new PageAddress(pageAddress.FileId, pageAddress.PageId + (i * interval));
allocationMap.Pages.Add(await GetAllocationPage(databaseId, allocationAddress));
}
}
}
public async Task <AllocationMap> GetAllocation(int databaseId, PageAddress pageAddress, int fileSize)
{
var allocation = new AllocationMap();
await BuildAllocationChain(allocation, databaseId, pageAddress, fileSize);
return(allocation);
}
public override void AssignExperiment()
{
var segment = GetSegment();
if (AllocationMap.ContainsKey(segment))
{
var experimentName = AllocationMap[segment];
_assignExperimentObject(experimentName);
}
}
public override bool RemoveExperiment(string name)
{
if (!ActiveExperiments.ContainsKey(name))
{
return(false);
}
var keysToRemove =
(from segmentAllocation in AllocationMap
where segmentAllocation.Value == name
select segmentAllocation.Key).ToList();
foreach (var key in keysToRemove)
{
AllocationMap.Remove(key);
AvailableSeqments.Add(key);
}
return(true);
}