Examples with Among org.btrplace.model.constraint.Among used on opensource projects

Example 6 with Among

use of org.btrplace.model.constraint.Among in project scheduler by btrplace.

the class CSplitAmong method inject.

@Override
public boolean inject(Parameters ps, ReconfigurationProblem rp) throws SchedulerException {
    if (cstr.isContinuous() && !cstr.isSatisfied(rp.getSourceModel())) {
        rp.getLogger().error("The constraint '{}' must be already satisfied to provide a continuous restriction", cstr);
        return false;
    }
    Collection<Collection<VM>> vGroups = cstr.getGroupsOfVMs();
    Collection<Collection<Node>> pGroups = cstr.getGroupsOfNodes();
    Model csp = rp.getModel();
    IntVar[] grpVars = new IntVar[vGroups.size()];
    // VM is assigned on a node <-> group variable associated to the VM
    // is assigned to the group of nodes it belong too.
    int i = 0;
    for (Collection<VM> vms : vGroups) {
        Among a = new Among(vms, pGroups);
        // If the constraint is continuous, there is no way a group of VMs already bound to a group of
        // nodes can move to another group. It also means the group of VMs will never overlap
        a.setContinuous(cstr.isContinuous());
        CAmong ca = new CAmong(a);
        if (!ca.inject(ps, rp)) {
            return false;
        }
        grpVars[i++] = ca.getGroupVariable();
    }
    // forces all the vGroups to use different group of nodes
    csp.post(csp.allDifferent(grpVars, "DEFAULT"));
    return true;
}