public void HandleDataChange(ZooKeeperDataChangedEventArgs args)
{
int parsedLeader;
var nodePath = args.Path;
var 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");
}
else
{
if (!_partitionLeaderMap.ContainsKey(nodePath) || _partitionLeaderMap[nodePath] != parsedLeader)
{
var 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 +
" and has not changed");
}
}
}
/// <summary>
/// Invokes subscribed handlers for ZooKeeeper data changes event
/// </summary>
/// <param name="e">
/// The event data.
/// </param>
private void OnDataChanged(ZooKeeperDataChangedEventArgs e)
{
DataChangedEventItem handlers;
this.dataChangedHandlers.TryGetValue(e.Path, out handlers);
if (handlers == null || handlers.TotalCount == 0)
{
return;
}
try
{
this.Exists(e.Path, true);
var data = this.ReadData <string>(e.Path, null, true);
e.Data = data;
handlers.OnDataChanged(e);
}
catch (KeeperException ex)
{
if (ex.ErrorCode == KeeperException.Code.NONODE)
{
handlers.OnDataDeleted(e);
}
else
{
throw;
}
}
}
public void HandleDataDelete(ZooKeeperDataChangedEventArgs args)
{
Logger.Debug(args + " reach test event handler");
this.events.Add(args);
}
public void HandleDataDelete(ZooKeeperDataChangedEventArgs args)
{
_rebalancer.AsyncRebalance();
}