public ZKSessionExpireListener(ZKGroupDirs dirs, string consumerIdString, TopicCount topicCount, ZKRebalancerListener loadBalancerListener, ZookeeperConsumerConnector zkConsumerConnector)
{
this.consumerIdString = consumerIdString;
this.loadBalancerListener = loadBalancerListener;
this.zkConsumerConnector = zkConsumerConnector;
this.dirs = dirs;
this.topicCount = topicCount;
}
public ZKSessionExpireListener(ZKGroupDirs dirs, string consumerIdString, TopicCount topicCount, ZKRebalancerListener loadBalancerListener, ZookeeperConsumerConnector zkConsumerConnector)
{
this.consumerIdString = consumerIdString;
this.loadBalancerListener = loadBalancerListener;
this.zkConsumerConnector = zkConsumerConnector;
this.dirs = dirs;
this.topicCount = topicCount;
}
public ZkPartitionLeaderListener(ZKRebalancerListener <TData> rebalancer, Dictionary <string, int> partitionLeaderMap = null)
{
_rebalancer = rebalancer;
if (partitionLeaderMap != null)
{
_partitionLeaderMap = new Dictionary <string, int>(partitionLeaderMap);
}
else
{
_partitionLeaderMap = new Dictionary <string, int>();
}
}
private IDictionary<string, IList<KafkaMessageStream>> Consume(IDictionary<string, int> topicCountDict)
{
Logger.Debug("entering consume");
if (topicCountDict == null)
{
throw new ArgumentNullException();
}
var dirs = new ZKGroupDirs(this.config.GroupId);
var result = new Dictionary<string, IList<KafkaMessageStream>>();
string consumerUuid = Environment.MachineName + "-" + DateTime.Now.Millisecond;
string consumerIdString = this.config.GroupId + "_" + consumerUuid;
var topicCount = new TopicCount(consumerIdString, topicCountDict);
// listener to consumer and partition changes
var loadBalancerListener = new ZKRebalancerListener(
this.config,
consumerIdString,
this.topicRegistry,
this.zkClient,
this,
queues,
this.fetcher,
this.syncLock);
this.RegisterConsumerInZk(dirs, consumerIdString, topicCount);
this.zkClient.Subscribe(dirs.ConsumerRegistryDir, loadBalancerListener);
//// create a queue per topic per consumer thread
var consumerThreadIdsPerTopicMap = topicCount.GetConsumerThreadIdsPerTopic();
foreach (var topic in consumerThreadIdsPerTopicMap.Keys)
{
var streamList = new List<KafkaMessageStream>();
foreach (string threadId in consumerThreadIdsPerTopicMap[topic])
{
var stream = new BlockingCollection<FetchedDataChunk>(new ConcurrentQueue<FetchedDataChunk>());
this.queues.Add(new Tuple<string, string>(topic, threadId), stream);
streamList.Add(new KafkaMessageStream(stream, this.config.Timeout));
}
result.Add(topic, streamList);
Logger.DebugFormat(CultureInfo.CurrentCulture, "adding topic {0} and stream to map...", topic);
// register on broker partition path changes
string partitionPath = ZooKeeperClient.DefaultBrokerTopicsPath + "/" + topic;
this.zkClient.MakeSurePersistentPathExists(partitionPath);
this.zkClient.Subscribe(partitionPath, loadBalancerListener);
}
//// register listener for session expired event
this.zkClient.Subscribe(new ZKSessionExpireListener(dirs, consumerIdString, topicCount, loadBalancerListener, this));
//// explicitly trigger load balancing for this consumer
lock (this.syncLock)
{
loadBalancerListener.SyncedRebalance();
}
return result;
}