public ServerSelector(ProblemInput input, ProblemOutput result)
{
_input = input;
_result = result;
_availableServersByCapacity = new Stack <Server>(GetServerListByPreference(input));
}
public RowAllocator(ProblemInput input, ProblemOutput result, Random random)
{
_random = random;
_result = result;
_input = input;
_unusedServers = new Stack <Server>();
CreateRows();
}
public bool AllocateNextServerToPool(ProblemInput input, ServerSelector serverSelector, Pool pool)
{
var nextServer = serverSelector.UseNextServer();
ServerAllocation allocation = AlllocateServerToRow(input, nextServer, pool);
if (allocation == null)
{
_unusedServers.Push(nextServer);
return(false);
}
allocation.Pool = pool;
_result._allocations.Add(allocation.Server, allocation);
return(true);
}
public Row(ProblemInput input, int rowIndex)
{
_rowIndex = rowIndex;
_columns = input.Columns;
_isAvailable = new bool[input.Columns];
for (int i = 0; i < input.Columns; i++)
{
_isAvailable[i] = true;
}
foreach (var slot in input.UnavilableSlots)
{
if (slot.Y != rowIndex)
{
continue;
}
_isAvailable[slot.X] = false;
}
}
private ServerAllocation AlllocateServerToRow(ProblemInput input, Server server, Pool pool)
{
Row row;
int column;
int tries = 0;
do
{
row = GetNextRowForPool(pool);
column = row.GetAndAcquireSlot(server.Slots);
tries++;
if (tries > input.Rows * 2)
{
return(null);
}
} while (column == -1);
return(new ServerAllocation {
InitialColumn = column, Row = row._rowIndex, Server = server
});
}
private IOrderedEnumerable <Server> GetServerListByPreference(ProblemInput input)
{
return(input.Servers.OrderBy(x => ((double)x.Capacity) / x.Slots));
}