public int getRackOwned(String site, String rack) {
   int count = 0;
   for (Address node : topologyInfo.getRackNodes(site, rack)) {
     count += stats.getOwned(node);
   }
   return count;
 }
 public int getMachineOwned(String site, String rack, String machine) {
   int count = 0;
   for (Address node : topologyInfo.getMachineNodes(site, rack, machine)) {
     count += stats.getOwned(node);
   }
   return count;
 }
 public int getSiteOwned(String site) {
   int count = 0;
   for (Address node : topologyInfo.getSiteNodes(site)) {
     count += stats.getOwned(node);
   }
   return count;
 }
 @Override
 public String toString() {
   StringBuilder sb = new StringBuilder("TopologyAwareOwnershipStatistics{\n");
   for (String site : topologyInfo.getAllSites()) {
     sb.append(
         String.format("  %s: %d/%d\n", site, getSitePrimaryOwned(site), getSiteOwned(site)));
     for (String rack : topologyInfo.getSiteRacks(site)) {
       sb.append(
           String.format(
               "    %s: %d/%d\n",
               rack, getRackPrimaryOwned(site, rack), getRackOwned(site, rack)));
       for (String machine : topologyInfo.getRackMachines(site, rack)) {
         sb.append(
             String.format(
                 "      %s: %d/%d\n",
                 machine,
                 getMachinePrimaryOwned(site, rack, machine),
                 getMachineOwned(site, rack, machine)));
         for (Address node : topologyInfo.getMachineNodes(site, rack, machine)) {
           int expectedPrimarySegments =
               topologyInfo.computeExpectedSegments(numSegments, 1, node);
           int expectedOwnedSegments =
               topologyInfo.computeExpectedSegments(numSegments, numOwners, node);
           sb.append(
               String.format(
                   "        %s: %d/%d (%d/%d)\n",
                   node,
                   stats.getPrimaryOwned(node),
                   stats.getOwned(node),
                   expectedPrimarySegments,
                   expectedOwnedSegments));
         }
       }
     }
   }
   sb.append('}');
   return sb.toString();
 }
 public int getOwned(Address node) {
   return stats.getOwned(node);
 }