/**
* Creates new overlay item or adds new underlay item into existing overlay item if the condition
* for correlation is satisfied
*
* @param newItem - new underlay item on which the correlation is created
*/
private void checkForPossibleAggregation(UnderlayItem newItem, String topologyId) {
for (TopologyStore ts : topoStoreProvider.getTopologyStores()) {
if ((!ts.getId().equals(topologyId)) || ts.isAggregateInside()) {
for (Entry<YangInstanceIdentifier, UnderlayItem> topoStoreEntry :
ts.getUnderlayItems().entrySet()) {
UnderlayItem topoStoreItem = topoStoreEntry.getValue();
if (newItem.getCorrelationItem() == CorrelationItemEnum.Link) {
checkForPossibleAggregationOfLinks(newItem, topoStoreItem);
} else {
if (scriptEngine != null) {
if (aggregableWithScript(newItem, topoStoreItem)) {
aggregateItems(newItem, topoStoreItem);
return;
}
} else if (!newItem.equals(topoStoreItem)
&& matchTargetFields(newItem, topoStoreItem)) {
// no previous aggregation on this node
aggregateItems(newItem, topoStoreItem);
return;
}
}
}
}
}
if (wrapSingleItem()) {
List<UnderlayItem> itemsToAggregate = new ArrayList<>();
itemsToAggregate.add(newItem);
OverlayItem overlayItem = new OverlayItem(itemsToAggregate, newItem.getCorrelationItem());
newItem.setOverlayItem(overlayItem);
topologyManager.addOverlayItem(overlayItem);
}
}
@Override
public void processCreatedChanges(
YangInstanceIdentifier identifier, UnderlayItem createdItem, final String topologyId) {
LOG.trace("Processing createdChanges");
for (TopologyStore ts : topoStoreProvider.getTopologyStores()) {
// Link aggregation has always only one topology store
if (ts.getId().equals(topologyId)
|| createdItem.getCorrelationItem() == CorrelationItemEnum.Link) {
ts.getUnderlayItems().put(identifier, createdItem);
}
}
checkForPossibleAggregation(createdItem, topologyId);
}
@Override
public void processUpdatedChanges(
YangInstanceIdentifier identifier, UnderlayItem updatedItem, String topologyId) {
LOG.trace("Processing updatedChanges");
for (TopologyStore ts : topoStoreProvider.getTopologyStores()) {
if (ts.getId().equals(topologyId)) {
LOG.debug("Updating overlay item");
UnderlayItem underlayItem = ts.getUnderlayItems().get(identifier);
Preconditions.checkNotNull(
underlayItem, "Updated underlay item not found in the Topology store");
underlayItem.setItem(updatedItem.getItem());
if (underlayItem.getCorrelationItem() == CorrelationItemEnum.Link) {
if (underlayItem instanceof ComputedLink && updatedItem instanceof ComputedLink) {
ComputedLink underlayLink = (ComputedLink) underlayItem;
ComputedLink updatedLink = (ComputedLink) updatedItem;
if (!matchTargetFields(underlayItem, updatedItem)
|| !underlayLink.getSrcNode().equals(updatedLink.getSrcNode())
|| !underlayLink.getDstNode().equals(updatedLink.getDstNode())) {
underlayLink.setLeafNodes(updatedLink.getLeafNodes());
underlayLink.setSrcNode(updatedLink.getSrcNode());
underlayLink.setDstNode(updatedLink.getDstNode());
if (underlayItem.getOverlayItem() != null) {
removeUnderlayItemFromOverlayItem(underlayItem);
}
checkForPossibleAggregationOfLinks(updatedLink, underlayLink);
} else if (underlayItem.getOverlayItem() != null) {
// in case that only Link value was changed
topologyManager.updateOverlayItem(underlayItem.getOverlayItem());
}
break;
}
} else {
// if Leaf Node was changed
if (!matchTargetFields(underlayItem, updatedItem)) {
underlayItem.setLeafNodes(updatedItem.getLeafNodes());
if (underlayItem.getOverlayItem() != null) {
removeUnderlayItemFromOverlayItem(underlayItem);
}
checkForPossibleAggregation(underlayItem, topologyId);
} else if (underlayItem.getOverlayItem() != null) {
// in case that only Node value was changed
topologyManager.updateOverlayItem(underlayItem.getOverlayItem());
}
break;
}
}
}
}
/**
* @param newItem item received from notification
* @param topoStoreItem item already stored in topostore
*/
private void aggregateItems(UnderlayItem newItem, UnderlayItem topoStoreItem) {
if (topoStoreItem.getOverlayItem() == null) {
LOG.debug("Creating new Logical Node");
// create new logical node
List<UnderlayItem> nodesToAggregate = new ArrayList<>();
nodesToAggregate.add(newItem);
nodesToAggregate.add(topoStoreItem);
OverlayItem overlayItem =
new OverlayItem(nodesToAggregate, topoStoreItem.getCorrelationItem());
topoStoreItem.setOverlayItem(overlayItem);
newItem.setOverlayItem(overlayItem);
topologyManager.addOverlayItem(overlayItem);
return;
}
LOG.debug("Adding physical node to existing Logical Node");
// add new physical node into existing logical node
OverlayItem overlayItem = topoStoreItem.getOverlayItem();
newItem.setOverlayItem(overlayItem);
overlayItem.addUnderlayItem(newItem);
topologyManager.updateOverlayItem(overlayItem);
}
private OverlayItem wrapUnderlayItem(UnderlayItem underlayItem) {
List<UnderlayItem> underlayItems = Collections.singletonList(underlayItem);
OverlayItem overlayItem = new OverlayItem(underlayItems, underlayItem.getCorrelationItem());
return overlayItem;
}