func dialKafka(kn kafkaNotify) (kafkaConn, error) {
if !kn.Enable {
return kafkaConn{}, errNotifyNotEnabled
}
if kn.Topic == "" {
return kafkaConn{}, fmt.Errorf(
"Kafka Notifier Error: Topic was not specified in configuration")
}
config := sarama.NewConfig()
// Wait for all in-sync replicas to ack the message
config.Producer.RequiredAcks = sarama.WaitForAll
// Retry up to 10 times to produce the message
config.Producer.Retry.Max = 10
config.Producer.Return.Successes = true
p, err := sarama.NewSyncProducer(kn.Brokers, config)
if err != nil {
return kafkaConn{}, fmt.Errorf(
"Kafka Notifier Error: Failed to start producer: %v",
err,
)
}
return kafkaConn{p, kn.Topic}, nil
}
func (z *zipkin) run() {
t := time.NewTicker(z.opts.BatchInterval)
c, err := sarama.NewClient(z.opts.Collectors, sarama.NewConfig())
if err != nil {
return
}
p, err := sarama.NewSyncProducerFromClient(c)
if err != nil {
return
}
var buf []*trace.Span
for {
select {
case s := <-z.spans:
buf = append(buf, s)
if len(buf) >= z.opts.BatchSize {
go z.send(buf, p)
buf = nil
}
case <-t.C:
// flush
if len(buf) > 0 {
go z.send(buf, p)
buf = nil
}
case <-z.exit:
// exit
t.Stop()
p.Close()
return
}
}
}
// Configure initializes this consumer with values from a plugin config.
func (cons *Kafka) Configure(conf core.PluginConfig) error {
err := cons.ConsumerBase.Configure(conf)
if err != nil {
return err
}
if !conf.HasValue("Servers") {
return core.NewConsumerError("No servers configured for consumer.Kafka")
}
cons.servers = conf.GetStringArray("Servers", []string{})
cons.topic = conf.GetString("Topic", "default")
cons.offsetFile = conf.GetString("OffsetFile", "")
cons.persistTimeout = time.Duration(conf.GetInt("PresistTimoutMs", 5000)) * time.Millisecond
cons.offsets = make(map[int32]int64)
cons.MaxPartitionID = 0
cons.config = kafka.NewConfig()
cons.config.ClientID = conf.GetString("ClientId", "gollum")
cons.config.ChannelBufferSize = conf.GetInt("MessageBufferCount", 256)
cons.config.Net.MaxOpenRequests = conf.GetInt("MaxOpenRequests", 5)
cons.config.Net.DialTimeout = time.Duration(conf.GetInt("ServerTimeoutSec", 30)) * time.Second
cons.config.Net.ReadTimeout = cons.config.Net.DialTimeout
cons.config.Net.WriteTimeout = cons.config.Net.DialTimeout
cons.config.Metadata.Retry.Max = conf.GetInt("ElectRetries", 3)
cons.config.Metadata.Retry.Backoff = time.Duration(conf.GetInt("ElectTimeoutMs", 250)) * time.Millisecond
cons.config.Metadata.RefreshFrequency = time.Duration(conf.GetInt("MetadataRefreshMs", 10000)) * time.Millisecond
cons.config.Consumer.Fetch.Min = int32(conf.GetInt("MinFetchSizeByte", 1))
cons.config.Consumer.Fetch.Max = int32(conf.GetInt("MaxFetchSizeByte", 0))
cons.config.Consumer.Fetch.Default = int32(conf.GetInt("MaxFetchSizeByte", 32768))
cons.config.Consumer.MaxWaitTime = time.Duration(conf.GetInt("FetchTimeoutMs", 250)) * time.Millisecond
offsetValue := strings.ToLower(conf.GetString("DefaultOffset", kafkaOffsetNewest))
switch offsetValue {
case kafkaOffsetNewest:
cons.defaultOffset = kafka.OffsetNewest
case kafkaOffsetOldest:
cons.defaultOffset = kafka.OffsetOldest
default:
cons.defaultOffset, _ = strconv.ParseInt(offsetValue, 10, 64)
fileContents, err := ioutil.ReadFile(cons.offsetFile)
if err != nil {
return err
}
// Decode the JSON file into the partition -> offset map
encodedOffsets := make(map[string]int64)
err = json.Unmarshal(fileContents, &encodedOffsets)
if err != nil {
return err
}
for k, v := range encodedOffsets {
id, err := strconv.Atoi(k)
if err != nil {
return err
}
cons.offsets[int32(id)] = v
}
}
return nil
}
// Configure initializes this producer with values from a plugin config.
func (prod *Kafka) Configure(conf core.PluginConfig) error {
err := prod.ProducerBase.Configure(conf)
if err != nil {
return err
}
if !conf.HasValue("Servers") {
return core.NewProducerError("No servers configured for producer.Kafka")
}
prod.servers = conf.GetStringArray("Servers", []string{})
prod.topic = conf.GetStreamMap("Topic", "")
prod.clientID = conf.GetString("ClientId", "gollum")
prod.config = kafka.NewConfig()
prod.config.ClientID = conf.GetString("ClientId", "gollum")
prod.config.ChannelBufferSize = conf.GetInt("MessageBufferCount", 256)
prod.config.Net.MaxOpenRequests = conf.GetInt("MaxOpenRequests", 5)
prod.config.Net.DialTimeout = time.Duration(conf.GetInt("ServerTimeoutSec", 30)) * time.Second
prod.config.Net.ReadTimeout = prod.config.Net.DialTimeout
prod.config.Net.WriteTimeout = prod.config.Net.DialTimeout
prod.config.Metadata.Retry.Max = conf.GetInt("ElectRetries", 3)
prod.config.Metadata.Retry.Backoff = time.Duration(conf.GetInt("ElectTimeoutMs", 250)) * time.Millisecond
prod.config.Metadata.RefreshFrequency = time.Duration(conf.GetInt("MetadataRefreshMs", 10000)) * time.Millisecond
prod.config.Producer.MaxMessageBytes = conf.GetInt("BatchSizeMaxKB", 1<<10) << 10
prod.config.Producer.RequiredAcks = kafka.RequiredAcks(conf.GetInt("RequiredAcks", int(kafka.WaitForLocal)))
prod.config.Producer.Timeout = time.Duration(conf.GetInt("TimoutMs", 1500)) * time.Millisecond
prod.config.Producer.Return.Errors = true
prod.config.Producer.Return.Successes = false
switch strings.ToLower(conf.GetString("Compression", compressNone)) {
default:
fallthrough
case compressNone:
prod.config.Producer.Compression = kafka.CompressionNone
case compressGZIP:
prod.config.Producer.Compression = kafka.CompressionGZIP
case compressSnappy:
prod.config.Producer.Compression = kafka.CompressionSnappy
}
switch strings.ToLower(conf.GetString("Partitioner", partRandom)) {
case partRandom:
prod.config.Producer.Partitioner = kafka.NewRandomPartitioner
case partRoundrobin:
prod.config.Producer.Partitioner = kafka.NewRoundRobinPartitioner
default:
fallthrough
case partHash:
prod.config.Producer.Partitioner = kafka.NewHashPartitioner
}
prod.config.Producer.Flush.Bytes = conf.GetInt("BatchSizeByte", 8192)
prod.config.Producer.Flush.Messages = conf.GetInt("BatchMinCount", 1)
prod.config.Producer.Flush.Frequency = time.Duration(conf.GetInt("BatchTimeoutSec", 3)) * time.Second
prod.config.Producer.Flush.MaxMessages = conf.GetInt("BatchMaxCount", 0)
prod.config.Producer.Retry.Max = conf.GetInt("SendRetries", 3)
prod.config.Producer.Retry.Backoff = time.Duration(conf.GetInt("SendTimeoutMs", 100)) * time.Millisecond
return nil
}