/**
* Event handler called when multiple links go up or down.
*
* @param updateList information about the change in each link's state
*/
@Override
public void linkDiscoveryUpdate(List<LDUpdate> updateList) {
for (LDUpdate update : updateList) {
// If we only know the switch & port for one end of the link, then
// the link must be from a switch to a host
if (0 == update.getDst()) {
log.info(
String.format("Link s%s:%d -> host updated", update.getSrc(), update.getSrcPort()));
}
// Otherwise, the link is between two switches
else {
log.info(
String.format(
"Link s%s:%d -> s%s:%d updated",
update.getSrc(), update.getSrcPort(), update.getDst(), update.getDstPort()));
}
}
/** ****************************************************************** */
/* TODO: Update routing: change routing rules for all hosts */
updateAllRouting();
/** ****************************************************************** */
}
/**
* Updates concerning switch disconnect and port down are not processed. LinkDiscoveryManager is
* expected to process those messages and send multiple link removed messages. However, all the
* updates from LinkDiscoveryManager would be propagated to the listeners of topology.
*/
@LogMessageDoc(
level = "ERROR",
message = "Error reading link discovery update.",
explanation = "Unable to process link discovery update",
recommendation = LogMessageDoc.REPORT_CONTROLLER_BUG)
public void applyUpdates() {
appliedUpdates.clear();
LDUpdate update = null;
while (ldUpdates.peek() != null) {
try {
update = ldUpdates.take();
} catch (Exception e) {
log.error("Error reading link discovery update.", e);
}
if (log.isTraceEnabled()) {
log.trace("Applying update: {}", update);
}
if (update.getOperation() == UpdateOperation.LINK_UPDATED) {
addOrUpdateLink(
update.getSrc(),
update.getSrcPort(),
update.getDst(),
update.getDstPort(),
update.getType());
} else if (update.getOperation() == UpdateOperation.LINK_REMOVED) {
removeLink(
update.getSrc(), update.getSrcPort(),
update.getDst(), update.getDstPort());
}
// Add to the list of applied updates.
appliedUpdates.add(update);
}
}
