public void HandleDataChange(Events.ZooKeeperDataChangedEventArgs args)
{
int parsedLeader;
string nodePath = args.Path;
string nodeData = args.Data;
Logger.Info("A partition leader or ISR list has been updated. Determining if rebalancing is necessary");
if (!ZkUtils.TryParsePartitionLeader(nodeData, out parsedLeader))
{
Logger.Error("Skipping rebalancing. Failed to parse partition leader for path: " + nodePath + " from ZK node");
return;
}
else
{
if (!_partitionLeaderMap.ContainsKey(nodePath) || _partitionLeaderMap[nodePath] != parsedLeader)
{
string currentLeader = _partitionLeaderMap.ContainsKey(nodePath) ? _partitionLeaderMap[nodePath].ToString() : "null";
Logger.Info("Performing rebalancing. Leader value for path: " + nodePath + " has changed from " + currentLeader + " to " + parsedLeader);
_partitionLeaderMap[nodePath] = parsedLeader;
_rebalancer.AsyncRebalance();
}
else
{
Logger.Info("Skipping rebalancing. Leader value for path: " + nodePath + " is " + parsedLeader.ToString() + " and has not changed");
}
}
}
public void HandleDataDelete(Events.ZooKeeperDataChangedEventArgs args)
{
_rebalancer.AsyncRebalance();
}
