+ @Override
+ protected InstanceIdentifier<?> listenPath() {
+ return getNodeIdentifierBuilder().augmentation(FlowCapableNode.class).child(Group.class).build();
+ }
+
+ @Override
+ protected String statName() {
+ return "Group Descriptor";
+ }
+
+ public void request() {
+ if (groupStatsService != null) {
+ final GetGroupDescriptionInputBuilder input = new GetGroupDescriptionInputBuilder();
+ input.setNode(getNodeRef());
+
+ requestHelper(groupStatsService.getGroupDescription(input.build()));
+ }
+ }
+
+ @Override
+ public void onDataChanged(DataChangeEvent<InstanceIdentifier<?>, DataObject> change) {
+ for (InstanceIdentifier<?> key : change.getCreatedConfigurationData().keySet()) {
+ if (Group.class.equals(key.getTargetType())) {
+ logger.debug("Key {} triggered request", key);
+ request();
+ } else {
+ logger.debug("Ignoring key {}", key);
+ }
+ }
+
+ final DataModificationTransaction trans = startTransaction();
+ for (InstanceIdentifier<?> key : change.getRemovedConfigurationData()) {
+ if (Group.class.equals(key.getTargetType())) {
+ @SuppressWarnings("unchecked")
+ InstanceIdentifier<Group> group = (InstanceIdentifier<Group>)key;
+ InstanceIdentifier<?> del = InstanceIdentifier.builder(group).augmentation(NodeGroupDescStats.class).toInstance();
+ logger.debug("Key {} triggered remove of augmentation {}", key, del);
+
+ trans.removeOperationalData(del);
+ }
+ }
+ trans.commit();
+ }
+
+ @Override
+ public void start(final DataBrokerService dbs) {
+ if (groupStatsService == null) {
+ logger.debug("No Group Statistics service, not subscribing to groups on node {}", getNodeIdentifier());
+ return;
+ }