func (cmd *MetaCommand) Exec(cl model.Cluster) error {
b, err := cl.Leader(cmd.Topic, int32(cmd.Partition))
if err != nil {
return err
}
res, err := proto.Metadata(cmd.Topic).Fetch(b)
if err != nil {
return err
}
fmt.Println(toJSON(res))
return nil
}
func (c *C) updateFromTopicMetadata(topic string) error {
brokers, err := c.pool.Brokers()
if err != nil {
return err
}
var merr MultiError
for _, broker := range brokers {
// no retry, fail fast
m, err := proto.Metadata(topic).Fetch(broker)
if err != nil {
merr.Add(err)
continue
}
for i := range m.Brokers {
b := &m.Brokers[i]
c.pool.Add(b.NodeID, b.Addr())
}
for i := range m.TopicMetadatas {
t := &m.TopicMetadatas[i]
if t.TopicName == topic {
partitions := make([]int32, len(t.PartitionMetadatas))
for i := range t.PartitionMetadatas {
partition := &t.PartitionMetadatas[i]
partitions[i] = partition.PartitionID
if err := c.pool.SetLeader(topic, partition.PartitionID, partition.Leader); err != nil {
merr.Add(err)
continue
}
}
c.topics.addPartitions(topic, partitions)
return nil
}
}
}
return merr
}