Examples with CPowerView org.btrplace.scheduler.choco.view.CPowerView used on opensource projects

Example 1 with CPowerView

use of org.btrplace.scheduler.choco.view.CPowerView in project scheduler by btrplace.

the class CMaxOnline method inject.

@Override
public boolean inject(Parameters ps, ReconfigurationProblem rp) throws SchedulerException {
    Model csp = rp.getModel();
    if (constraint.getInvolvedNodes().isEmpty()) {
        // The constraint is entailed as it contains no node.
        return true;
    }
    if (constraint.isContinuous()) {
        CPowerView view = (CPowerView) rp.getView(CPowerView.VIEW_ID);
        if (view == null) {
            view = new CPowerView();
            if (!rp.addView(view)) {
                throw new SchedulerModelingException(rp.getSourceModel(), "Unable to attach view '" + CPowerView.VIEW_ID + "'");
            }
            if (!view.inject(ps, rp)) {
                throw new SchedulerModelingException(rp.getSourceModel(), "Unable to inject view '" + CPowerView.VIEW_ID + "'");
            }
        }
        int numberOfTasks = constraint.getInvolvedNodes().size();
        int i = 0;
        int[] nodeIdx = new int[numberOfTasks];
        for (Node n : constraint.getInvolvedNodes()) {
            nodeIdx[i++] = rp.getNode(n);
        }
        IntVar capacity = rp.fixed(constraint.getAmount(), "capacity");
        // The state of the node:
        IntVar[] heights = new IntVar[numberOfTasks];
        IntVar[] starts = new IntVar[numberOfTasks];
        IntVar[] ends = new IntVar[numberOfTasks];
        // Online duration:
        IntVar[] durations = new IntVar[numberOfTasks];
        // Online duration is modeled as a task
        Task[] taskVars = new Task[numberOfTasks];
        for (int idx = 0; idx < nodeIdx.length; idx++) {
            Node n = rp.getNode(nodeIdx[idx]);
            // ---------------GET PowerStart and PowerEnd of the node------------------
            starts[idx] = view.getPowerStart(rp.getNode(n));
            ends[idx] = view.getPowerEnd(rp.getNode(n));
            // ------------------------------------------------------------------------
            durations[idx] = rp.makeUnboundedDuration(rp.makeVarLabel("Dur(", n, ")"));
            csp.post(csp.arithm(durations[idx], "<=", rp.getEnd()));
            // All tasks have to be scheduled
            heights[idx] = csp.intVar(1);
            taskVars[idx] = new Task(starts[idx], durations[idx], ends[idx]);
        }
        csp.post(csp.cumulative(taskVars, heights, capacity, true));
    }
    // Constraint for discrete model
    List<IntVar> nodesState = new ArrayList<>(constraint.getInvolvedNodes().size());
    for (Node ni : constraint.getInvolvedNodes()) {
        nodesState.add(rp.getNodeAction(ni).getState());
    }
    IntVar mySum = csp.intVar(rp.makeVarLabel("nbOnline"), 0, constraint.getAmount(), true);
    csp.post(csp.sum(nodesState.toArray(new IntVar[nodesState.size()]), "=", mySum));
    csp.post(csp.arithm(mySum, "<=", constraint.getAmount()));
    return true;
}