// sequence is a list of <job,mac,starttime>
public int[,] Optimize(string name, out int optMakespan, out bool success,
out int simplexIterations, int tmlim_min, List<Schedule.Dispatch> constraints = null)
{
GurobiJspModel model = new GurobiJspModel(this, name, tmlim_min);
var xTimeJob = constraints != null
? model.Lookahead(constraints, out optMakespan)
: model.Optimise(out optMakespan);
simplexIterations = model.SimplexIterations;
success = model.Status == GRB.Status.OPTIMAL;
model.Dispose();
return xTimeJob;
}
private List<Preference> FindFeaturesForAllJobs(Schedule jssp, GurobiJspModel gurobiModel)
{
Preference[] prefs = new Preference[jssp.ReadyJobs.Count];
for (int r = 0; r < jssp.ReadyJobs.Count; r++)
{
Schedule lookahead = jssp.Clone();
Features phi = lookahead.Dispatch1(jssp.ReadyJobs[r], FeatureMode, null); // commit the lookahead
prefs[r] = new Preference(lookahead.Sequence[lookahead.Sequence.Count - 1], phi);
// need to optimize to label featuers correctly -- this is computationally intensive
gurobiModel.Lookahead(prefs[r].Dispatch, out prefs[r].ResultingOptMakespan);
prefs[r].SimplexIterations = gurobiModel.SimplexIterations;
}
return prefs.ToList();
}
internal string CollectAndLabel(int pid)
{
string name = GetName(pid);
DataRow instance = Data.Rows.Find(name);
ProblemInstance prob = (ProblemInstance) instance["Problem"];
GurobiJspModel gurobiModel = new GurobiJspModel(prob, name, TMLIM_STEP);
Schedule jssp = new Schedule(prob);
int currentNumFeatures = 0;
for (int step = 0; step < prob.Dimension; step++)
{
Preferences[pid - 1, step] = FindFeaturesForAllJobs(jssp, gurobiModel);
int dispatchedJob = _trajectory(jssp, Preferences[pid - 1, step]);
jssp.Dispatch1(dispatchedJob);
gurobiModel.CommitConstraint(jssp.Sequence[step], step);
Preferences[pid - 1, step].Find(x => x.Dispatch.Job == dispatchedJob).Followed = true;
currentNumFeatures += Preferences[pid - 1, step].Count;
}
NumFeatures += currentNumFeatures;
gurobiModel.Dispose();
RankPreferences(pid);
return String.Format("{0}:{1} #{2} phi", FileInfo.Name, pid, currentNumFeatures);
}
