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@eapache @horkhe @wladh @slaunay @aybabtme
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package sarama
import "github.com/rcrowley/go-metrics"
// RequiredAcks is used in Produce Requests to tell the broker how many replica acknowledgements
// it must see before responding. Any of the constants defined here are valid. On broker versions
// prior to 0.8.2.0 any other positive int16 is also valid (the broker will wait for that many
// acknowledgements) but in 0.8.2.0 and later this will raise an exception (it has been replaced
// by setting the `min.isr` value in the brokers configuration).
type RequiredAcks int16
const (
// NoResponse doesn't send any response, the TCP ACK is all you get.
NoResponse RequiredAcks = 0
// WaitForLocal waits for only the local commit to succeed before responding.
WaitForLocal RequiredAcks = 1
// WaitForAll waits for all in-sync replicas to commit before responding.
// The minimum number of in-sync replicas is configured on the broker via
// the `min.insync.replicas` configuration key.
WaitForAll RequiredAcks = -1
)
type ProduceRequest struct {
TransactionalID *string
RequiredAcks RequiredAcks
Timeout int32
Version int16 // v1 requires Kafka 0.9, v2 requires Kafka 0.10, v3 requires Kafka 0.11
records map[string]map[int32]Records
}
func updateMsgSetMetrics(msgSet *MessageSet, compressionRatioMetric metrics.Histogram,
topicCompressionRatioMetric metrics.Histogram) int64 {
var topicRecordCount int64
for _, messageBlock := range msgSet.Messages {
// Is this a fake "message" wrapping real messages?
if messageBlock.Msg.Set != nil {
topicRecordCount += int64(len(messageBlock.Msg.Set.Messages))
} else {
// A single uncompressed message
topicRecordCount++
}
// Better be safe than sorry when computing the compression ratio
if messageBlock.Msg.compressedSize != 0 {
compressionRatio := float64(len(messageBlock.Msg.Value)) /
float64(messageBlock.Msg.compressedSize)
// Histogram do not support decimal values, let's multiple it by 100 for better precision
intCompressionRatio := int64(100 * compressionRatio)
compressionRatioMetric.Update(intCompressionRatio)
topicCompressionRatioMetric.Update(intCompressionRatio)
}
}
return topicRecordCount
}
func updateBatchMetrics(recordBatch *RecordBatch, compressionRatioMetric metrics.Histogram,
topicCompressionRatioMetric metrics.Histogram) int64 {
if recordBatch.compressedRecords != nil {
compressionRatio := int64(float64(recordBatch.recordsLen) / float64(len(recordBatch.compressedRecords)) * 100)
compressionRatioMetric.Update(compressionRatio)
topicCompressionRatioMetric.Update(compressionRatio)
}
return int64(len(recordBatch.Records))
}
func (r *ProduceRequest) encode(pe packetEncoder) error {
if r.Version >= 3 {
if err := pe.putNullableString(r.TransactionalID); err != nil {
return err
}
}
pe.putInt16(int16(r.RequiredAcks))
pe.putInt32(r.Timeout)
metricRegistry := pe.metricRegistry()
var batchSizeMetric metrics.Histogram
var compressionRatioMetric metrics.Histogram
if metricRegistry != nil {
batchSizeMetric = getOrRegisterHistogram("batch-size", metricRegistry)
compressionRatioMetric = getOrRegisterHistogram("compression-ratio", metricRegistry)
}
totalRecordCount := int64(0)
err := pe.putArrayLength(len(r.records))
if err != nil {
return err
}
for topic, partitions := range r.records {
err = pe.putString(topic)
if err != nil {
return err
}
err = pe.putArrayLength(len(partitions))
if err != nil {
return err
}
topicRecordCount := int64(0)
var topicCompressionRatioMetric metrics.Histogram
if metricRegistry != nil {
topicCompressionRatioMetric = getOrRegisterTopicHistogram("compression-ratio", topic, metricRegistry)
}
for id, records := range partitions {
startOffset := pe.offset()
pe.putInt32(id)
pe.push(&lengthField{})
err = records.encode(pe)
if err != nil {
return err
}
err = pe.pop()
if err != nil {
return err
}
if metricRegistry != nil {
if r.Version >= 3 {
topicRecordCount += updateBatchMetrics(records.RecordBatch, compressionRatioMetric, topicCompressionRatioMetric)
} else {
topicRecordCount += updateMsgSetMetrics(records.MsgSet, compressionRatioMetric, topicCompressionRatioMetric)
}
batchSize := int64(pe.offset() - startOffset)
batchSizeMetric.Update(batchSize)
getOrRegisterTopicHistogram("batch-size", topic, metricRegistry).Update(batchSize)
}
}
if topicRecordCount > 0 {
getOrRegisterTopicMeter("record-send-rate", topic, metricRegistry).Mark(topicRecordCount)
getOrRegisterTopicHistogram("records-per-request", topic, metricRegistry).Update(topicRecordCount)
totalRecordCount += topicRecordCount
}
}
if totalRecordCount > 0 {
metrics.GetOrRegisterMeter("record-send-rate", metricRegistry).Mark(totalRecordCount)
getOrRegisterHistogram("records-per-request", metricRegistry).Update(totalRecordCount)
}
return nil
}
func (r *ProduceRequest) decode(pd packetDecoder, version int16) error {
r.Version = version
if version >= 3 {
id, err := pd.getNullableString()
if err != nil {
return err
}
r.TransactionalID = id
}
requiredAcks, err := pd.getInt16()
if err != nil {
return err
}
r.RequiredAcks = RequiredAcks(requiredAcks)
if r.Timeout, err = pd.getInt32(); err != nil {
return err
}
topicCount, err := pd.getArrayLength()
if err != nil {
return err
}
if topicCount == 0 {
return nil
}
r.records = make(map[string]map[int32]Records)
for i := 0; i < topicCount; i++ {
topic, err := pd.getString()
if err != nil {
return err
}
partitionCount, err := pd.getArrayLength()
if err != nil {
return err
}
r.records[topic] = make(map[int32]Records)
for j := 0; j < partitionCount; j++ {
partition, err := pd.getInt32()
if err != nil {
return err
}
size, err := pd.getInt32()
if err != nil {
return err
}
recordsDecoder, err := pd.getSubset(int(size))
if err != nil {
return err
}
var records Records
if err := records.decode(recordsDecoder); err != nil {
return err
}
r.records[topic][partition] = records
}
}
return nil
}
func (r *ProduceRequest) key() int16 {
return 0
}
func (r *ProduceRequest) version() int16 {
return r.Version
}
func (r *ProduceRequest) requiredVersion() KafkaVersion {
switch r.Version {
case 1:
return V0_9_0_0
case 2:
return V0_10_0_0
case 3:
return V0_11_0_0
default:
return MinVersion
}
}
func (r *ProduceRequest) ensureRecords(topic string, partition int32) {
if r.records == nil {
r.records = make(map[string]map[int32]Records)
}
if r.records[topic] == nil {
r.records[topic] = make(map[int32]Records)
}
}
func (r *ProduceRequest) AddMessage(topic string, partition int32, msg *Message) {
r.ensureRecords(topic, partition)
set := r.records[topic][partition].MsgSet
if set == nil {
set = new(MessageSet)
r.records[topic][partition] = newLegacyRecords(set)
}
set.addMessage(msg)
}
func (r *ProduceRequest) AddSet(topic string, partition int32, set *MessageSet) {
r.ensureRecords(topic, partition)
r.records[topic][partition] = newLegacyRecords(set)
}
func (r *ProduceRequest) AddBatch(topic string, partition int32, batch *RecordBatch) {
r.ensureRecords(topic, partition)
r.records[topic][partition] = newDefaultRecords(batch)
}
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