private async Task RebalanceClusteringAsync(KeyValuePair <string, HashSet <string> > pair)
{
var topic = pair.Key;
try
{
var consumerIdList = await GetConsumerIdsForTopic(topic);
if (consumerIdList == null || consumerIdList.Count == 0)
{
_logger.WarnFormat("No available consumers found.");
UpdatePullRequestDict(pair, new List <MessageQueue>());
return;
}
var messageQueueList = await _clientService.GetTopicMessageQueuesAsync(topic);
if (messageQueueList == null || messageQueueList.Count == 0)
{
_logger.WarnFormat("No available message queues found, topic: {0}", topic);
UpdatePullRequestDict(pair, new List <MessageQueue>());
return;
}
var allocatedMessageQueueList = _allocateMessageQueueStragegy.Allocate(_clientId, messageQueueList, consumerIdList).ToList();
UpdatePullRequestDict(pair, allocatedMessageQueueList);
}
catch (Exception ex)
{
_logger.Error(string.Format("RebalanceClustering has exception, consumerGroup: {0}, consumerId: {1}, topic: {2}", _consumer.GroupName, _clientId, topic), ex);
UpdatePullRequestDict(pair, new List <MessageQueue>());
}
}
private void RebalanceClustering(string subscriptionTopic)
{
List <string> consumerIdList;
try
{
consumerIdList = QueryGroupConsumers(subscriptionTopic).ToList();
if (_consumerIds.Count != consumerIdList.Count)
{
_logger.DebugFormat("ConsumerIds changed, current consumerId:{0}, group:{1}, old:{2}, new:{3}", Id, GroupName, string.Join(",", _consumerIds), string.Join(",", consumerIdList));
_consumerIds = consumerIdList;
}
}
catch (Exception ex)
{
_logger.Error(string.Format("RebalanceClustering failed as QueryGroupConsumers has exception, consumerId:{0}, group:{1}, topic:{2}", Id, GroupName, subscriptionTopic), ex);
return;
}
consumerIdList.Sort();
IList <MessageQueue> messageQueues;
if (_topicQueuesDict.TryGetValue(subscriptionTopic, out messageQueues))
{
var messageQueueList = messageQueues.ToList();
messageQueueList.Sort((x, y) =>
{
if (x.QueueId > y.QueueId)
{
return(1);
}
else if (x.QueueId < y.QueueId)
{
return(-1);
}
return(0);
});
IEnumerable <MessageQueue> allocatedMessageQueues = new List <MessageQueue>();
try
{
allocatedMessageQueues = _allocateMessageQueueStragegy.Allocate(Id, messageQueueList, consumerIdList);
}
catch (Exception ex)
{
_logger.Error(string.Format("Allocate message queue has exception, consumerId:{0}, group:{1}, topic:{2}", Id, GroupName, subscriptionTopic), ex);
return;
}
UpdatePullRequestDict(subscriptionTopic, allocatedMessageQueues.ToList());
}
}