private (Node, Node) GetSourceAndSink(GAMSDatabase gdxFile, Node[] nodes)
{
string src = gdxFile.GetSet(_str.SourceNode).FirstRecord().Keys[0];
string snk = gdxFile.GetSet(_str.SinkNode).FirstRecord().Keys[0];
Node sourceNode = nodes.FirstOrDefault(n => n.Label == src);
Node sinkNode = nodes.FirstOrDefault(n => n.Label == snk);
if (sourceNode == null || sinkNode == null)
{
throw new ArgumentException("Source/Sink not defined.");
}
return(sourceNode, sinkNode);
}
private static void SolveWarehouse(GAMSWorkspace gmsWS, int NumberOfWarehouses, GAMSDatabase result, Object dbMutex)
{
// instantiate GAMSOptions and define some scalars
GAMSOptions gmsOpt = gmsWS.AddOptions();
gmsOpt.AllModelTypes = "Gurobi";
gmsOpt.Defines.Add("Warehouse", NumberOfWarehouses.ToString());
gmsOpt.Defines.Add("Store", "65");
gmsOpt.Defines.Add("fixed", "22");
gmsOpt.Defines.Add("disaggregate", "0");
gmsOpt.OptCR = 0.0; // Solve to optimality
// create a GAMSJob from string and write results to the result database
GAMSJob gmsJ = gmsWS.AddJobFromString(GetModelText());
gmsJ.Run(gmsOpt);
// need to lock database write operations
lock (dbMutex)
result.GetParameter("objrep").AddRecord(NumberOfWarehouses.ToString()).Value = gmsJ.OutDB.GetVariable("obj").FindRecord().Level;
foreach (GAMSVariableRecord supplyRec in gmsJ.OutDB.GetVariable("supply"))
{
if (supplyRec.Level > 0.5)
{
lock (dbMutex)
result.GetSet("supplyMap").AddRecord(NumberOfWarehouses.ToString(), supplyRec.Keys[0], supplyRec.Keys[1]);
}
}
}
private static void PrintResults(GAMSDatabase db, int instanceIx, bool enforceOrigin)
{
string ostr = "";
ostr += $"Instance {instanceIx + 1} {(enforceOrigin ? "with" : "w/out")} enforced origin\n";
ostr += $"Delays {GDXUtils.GetLevelsStr(db.GetVariable("v"))}\n";
ostr += $"Costs:\t{db.GetVariable("f").FirstRecord().Level}\n";
int numGoods = db.GetSet("i").NumberRecords;
int numComponents = db.GetSet("k").NumberRecords;
var z = db.GetVariable("z");
var xint = db.GetVariable("xint");
var x = db.GetVariable("x");
var orders = GetOrders(db.GetVariable("w"));
// first good is external source (not from disassembling but instead from order)
for (int i = 1; i < numGoods; i++)
{
for (int k = 0; k < numComponents; k++)
{
int whenProvided = WhenProvided(x, i, k);
ostr += $"i{i + 1},k{k + 1}: Provided at {whenProvided} ";
int repairStart = GetRepairStart(z, i, k);
if (repairStart >= 0)
{
ostr += $";; repair starts at {repairStart}";
}
bool internallyProvided = InternallyProvided(xint, i, k);
if (!internallyProvided)
{
Order o = orders.First(order => order.K == k);
ostr += $";; ordered at {o.T}";
}
ostr += "\n";
}
}
Console.WriteLine(ostr);
}
private Node[] ReadNodes(GAMSDatabase gdxFile)
{
var n = gdxFile.GetSet(_str.NodeSet);
var s = gdxFile.GetParameter(_str.StartTimes);
var e = gdxFile.GetParameter(_str.EndTimes);
Node[] nodes = new Node[n.NumberRecords];
double v = 0;
double w = 0;
int c = 0;
foreach (GAMSSetRecord r in n)
{
var startTime = s.FindRecord(r.Keys);
var endTime = s.FindRecord(r.Keys);
v = (startTime != null) ? startTime.Value : 0.0;
w = (endTime != null) ? endTime.Value : 0.0;
ResourceConstraint[] constraint = new ResourceConstraint[] { new ResourceConstraint(v, w) };
nodes[c] = new Node(c, r.Keys[0], constraint, c, c);
c++;
}
return(nodes);
}
private static void SolveWarehouse(GAMSWorkspace gmsWS, int NumberOfWarehouses, GAMSDatabase result, Object dbMutex)
{
// instantiate GAMSOptions and define some scalars
GAMSOptions gmsOpt = gmsWS.AddOptions();
gmsOpt.AllModelTypes = "Gurobi";
gmsOpt.Defines.Add("Warehouse", NumberOfWarehouses.ToString());
gmsOpt.Defines.Add("Store", "65");
gmsOpt.Defines.Add("fixed", "22");
gmsOpt.Defines.Add("disaggregate", "0");
gmsOpt.OptCR = 0.0; // Solve to optimality
// create a GAMSJob from string and write results to the result database
GAMSJob gmsJ = gmsWS.AddJobFromString(GetModelText());
gmsJ.Run(gmsOpt);
// need to lock database write operations
lock (dbMutex)
result.GetParameter("objrep").AddRecord(NumberOfWarehouses.ToString()).Value = gmsJ.OutDB.GetVariable("obj").FindRecord().Level;
foreach (GAMSVariableRecord supplyRec in gmsJ.OutDB.GetVariable("supply"))
if (supplyRec.Level > 0.5)
lock(dbMutex)
result.GetSet("supplyMap").AddRecord(NumberOfWarehouses.ToString(), supplyRec.Keys[0], supplyRec.Keys[1]);
}