/// <summary>
/// Called when the children of the given path changed
/// </summary>
/// <param name="e">The <see cref="Kafka.Client.ZooKeeperIntegration.Events.ZooKeeperChildChangedEventArgs"/> instance containing the event data
/// as parent path and children (null if parent was deleted).
/// </param>
public void HandleChildChange(ZooKeeperChildChangedEventArgs e)
{
Guard.NotNull(e, "e");
Guard.NotNullNorEmpty(e.Path, "e.Path");
Guard.NotNull(e.Children, "e.Children");
lock (this.syncLock)
{
try
{
string path = e.Path;
IEnumerable <string> childs = e.Children;
Logger.Debug("Watcher fired for path: " + path);
switch (path)
{
case ZooKeeperClient.DefaultBrokerTopicsPath:
List <string> oldTopics = this.oldBrokerTopicsPartitionsMap.Keys.ToList();
List <string> newTopics = childs.Except(oldTopics).ToList();
Logger.Debug("List of topics was changed at " + e.Path);
Logger.Debug("Current topics -> " + e.Children.ToMultiString(","));
Logger.Debug("Old list of topics -> " + oldTopics.ToMultiString(","));
Logger.Debug("List of newly registered topics -> " + newTopics.ToMultiString(","));
foreach (var newTopic in newTopics)
{
string brokerTopicPath = ZooKeeperClient.DefaultBrokerTopicsPath + "/" + newTopic;
IEnumerable <string> brokerList = this.zkclient.GetChildrenParentMayNotExist(brokerTopicPath);
this.ProcessNewBrokerInExistingTopic(newTopic, brokerList);
this.zkclient.Subscribe(ZooKeeperClient.DefaultBrokerTopicsPath + "/" + newTopic, this);
}
break;
case ZooKeeperClient.DefaultBrokerIdsPath:
Logger.Debug("List of brokers changed in the Kafka cluster " + e.Path);
Logger.Debug("Currently registered list of brokers -> " + e.Children.ToMultiString(","));
this.ProcessBrokerChange(path, childs);
break;
default:
string[] parts = path.Split('/');
string topic = parts.Last();
if (parts.Length == 4 && parts[2] == "topics" && childs != null)
{
Logger.Debug("List of brokers changed at " + path);
Logger.Debug(
"Currently registered list of brokers for topic " + topic + " -> " +
childs.ToMultiString(","));
this.ProcessNewBrokerInExistingTopic(topic, childs);
}
break;
}
this.oldBrokerTopicsPartitionsMap = this.actualBrokerTopicsPartitionsMap;
this.oldBrokerIdMap = this.actualBrokerIdMap;
}
catch (Exception exc)
{
Logger.Debug("Error while handling " + e, exc);
}
}
}
/// <summary>
/// Invokes subscribed handlers for ZooKeeeper child changes event
/// </summary>
/// <param name="e">
/// The event data.
/// </param>
private void OnChildChanged(ZooKeeperChildChangedEventArgs e)
{
ChildChangedEventItem handlers;
this.childChangedHandlers.TryGetValue(e.Path, out handlers);
if (handlers == null || handlers.Count == 0)
{
return;
}
this.Exists(e.Path);
try
{
IEnumerable <string> children = this.GetChildren(e.Path);
e.Children = children;
}
catch (KeeperException ex)// KeeperException.NoNodeException)
{
if (ex.ErrorCode == KeeperException.Code.NONODE)
{
}
else
{
throw;
}
}
handlers.OnChildChanged(e);
}
/// <summary>
/// Called when the children of the given path changed
/// </summary>
/// <param name="args">The <see cref="Kafka.Client.ZooKeeperIntegration.Events.ZooKeeperChildChangedEventArgs"/> instance containing the event data
/// as parent path and children (null if parent was deleted).
/// </param>
/// <remarks>
/// http://zookeeper.wiki.sourceforge.net/ZooKeeperWatches
/// </remarks>
public void HandleChildChange(ZooKeeperChildChangedEventArgs args)
{
Guard.NotNull(args, "args");
Guard.NotNullNorEmpty(args.Path, "args.Path");
Guard.NotNull(args.Children, "args.Children");
SyncedRebalance();
}
/// <summary>
/// Called when the children of the given path changed
/// </summary>
/// <param name="args">The <see cref="Kafka.Client.ZooKeeperIntegration.Events.ZooKeeperChildChangedEventArgs"/> instance containing the event data
/// as parent path and children (null if parent was deleted).
/// </param>
/// <remarks>
/// http://zookeeper.wiki.sourceforge.net/ZooKeeperWatches
/// </remarks>
public void HandleChildChange(ZooKeeperChildChangedEventArgs args)
{
Guard.NotNull(args, "args");
Guard.NotNullNorEmpty(args.Path, "args.Path");
Guard.NotNull(args.Children, "args.Children");
Logger.Info("Performing rebalancing. Consumers have been added or removed from the consumer group: " + args.Path);
AsyncRebalance();
}
/// <summary>
/// Invokes subscribed handlers for ZooKeeeper child changes event
/// </summary>
/// <param name="e">
/// The event data.
/// </param>
private void OnChildChanged(ZooKeeperChildChangedEventArgs e)
{
ChildChangedEventItem handlers;
this.childChangedHandlers.TryGetValue(e.Path, out handlers);
if (handlers == null || handlers.Count == 0)
{
return;
}
this.Exists(e.Path);
try
{
IList <string> children = this.GetChildren(e.Path);
e.Children = children;
}
catch (KeeperException.NoNodeException)
{
}
handlers.OnChildChanged(e);
}
public void HandleChildChange(ZooKeeperChildChangedEventArgs args)
{
Logger.Debug(args + " reach test event handler");
this.events.Add(args);
}
