@Override
public double calculate() {
HashMap<VirtualLink, Integer> lengths = new HashMap<VirtualLink, Integer>();
SubstrateNetwork sNetwork = stack.getSubstrate();
for (SubstrateLink sl : sNetwork.getEdges()) {
LinkedList<VirtualLink> visited = new LinkedList<VirtualLink>();
for (AbstractResource r : sl.get()) {
for (Mapping m : r.getMappings()) {
AbstractDemand d = m.getDemand();
NetworkEntity<? extends AbstractConstraint> e = d.getOwner();
if (e instanceof VirtualLink) {
VirtualLink vl = (VirtualLink) e;
if (!visited.contains(vl)) {
visited.add(vl);
Integer i = lengths.get(vl);
if (i == null) {
i = 1;
} else {
i++;
}
lengths.put(vl, i);
}
}
}
}
}
int sum = 0;
for (Integer i : lengths.values()) {
sum += i;
}
int counter = 0;
for (@SuppressWarnings("rawtypes") Network net : stack) {
if (net instanceof VirtualNetwork) {
VirtualNetwork vNet = (VirtualNetwork) net;
counter += vNet.getEdgeCount();
}
}
return (counter == 0 ? 0.0 : (sum / (double) counter));
}
public static int getStressLevel(SubstrateNode n) {
int max = 0;
int stress;
for (AbstractResource r : n.get()) {
stress = 0;
if (r instanceof CpuResource) {
for (Mapping f : r.getMappings()) {
if (f.getDemand().getOwner() instanceof VirtualNode) stress++;
}
} else {
stress = r.getMappings().size();
}
if (stress > max) {
max = stress;
}
}
return max;
}