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main.go
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main.go
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package main
// SIGUSR1 toggle the pause/resume consumption
import (
"context"
"flag"
"fmt"
"log"
"os"
"os/signal"
"runtime"
"strings"
"sync"
"syscall"
"time"
"github.com/Shopify/sarama"
"github.com/rcrowley/go-metrics"
"net/http"
_ "net/http/pprof"
)
// Sarama configuration options
var (
brokers = ""
version = ""
topic = ""
producers = 1
verbose = false
profile = false
recordsNumber int64 = 1
transactionalProducer = true
recordsRate = metrics.GetOrRegisterMeter("records.rate", nil)
)
func init() {
flag.StringVar(&brokers, "brokers", "", "Kafka bootstrap brokers to connect to, as a comma separated list")
flag.StringVar(&version, "version", "0.11.0.0", "Kafka cluster version")
flag.StringVar(&topic, "topic", "", "Kafka topics where records will be copied from topics.")
flag.IntVar(&producers, "producers", 1, "Number of concurrent producers")
flag.Int64Var(&recordsNumber, "records-number", 1000, "Number of records sent per loop")
flag.BoolVar(&transactionalProducer, "transactional", true, "true if producer is transactional")
flag.BoolVar(&profile, "profile", false, "Profile app on 9999")
flag.BoolVar(&verbose, "verbose", false, "Sarama logging")
flag.Parse()
if len(brokers) == 0 {
panic("no Kafka bootstrap brokers defined, please set the -brokers flag")
}
if len(topic) == 0 {
panic("no topic given to be consumed, please set the -topic flag")
}
}
func main() {
keepRunning := true
log.Println("Starting a new Sarama producer")
if verbose {
sarama.Logger = log.New(os.Stdout, "[sarama] ", log.LstdFlags)
}
version, err := sarama.ParseKafkaVersion(version)
if err != nil {
log.Panicf("Error parsing Kafka version: %v", err)
}
producerProvider := newProducerProvider(strings.Split(brokers, ","), func() *sarama.Config {
config := sarama.NewConfig()
config.Version = version
config.Producer.Idempotent = true
config.Producer.Return.Errors = false
config.Producer.RequiredAcks = sarama.WaitForAll
config.Producer.Partitioner = sarama.NewRoundRobinPartitioner
if transactionalProducer {
config.Producer.Transaction.ID = "txn_producer"
} else {
config.Producer.Return.Successes = true
}
config.Net.MaxOpenRequests = 1
return config
})
if profile {
runtime.SetMutexProfileFraction(5)
go func() {
fmt.Println(http.ListenAndServe("localhost:9999", nil))
}()
}
go metrics.Log(metrics.DefaultRegistry, 5*time.Second, log.New(os.Stderr, "metrics: ", log.Lmicroseconds))
ctx, cancel := context.WithCancel(context.Background())
var wg sync.WaitGroup
for i := 0; i < producers; i++ {
wg.Add(1)
go func() {
defer wg.Done()
for {
select {
case <-ctx.Done():
return
default:
produceTestRecord(producerProvider)
}
}
}()
}
sigusr1 := make(chan os.Signal, 1)
signal.Notify(sigusr1, syscall.SIGUSR1)
sigterm := make(chan os.Signal, 1)
signal.Notify(sigterm, syscall.SIGINT, syscall.SIGTERM)
for keepRunning {
<-sigterm
log.Println("terminating: via signal")
keepRunning = false
}
cancel()
wg.Wait()
producerProvider.clear()
}
func produceTestRecord(producerProvider *producerProvider) {
producer := producerProvider.borrow()
defer producerProvider.release(producer)
if producer.IsTransactional() {
err := producer.BeginTxn()
if err != nil {
log.Printf("unable to start txn %s\n", err)
return
}
}
var i int64
for i = 0; i < recordsNumber; i++ {
producer.Input() <- &sarama.ProducerMessage{Topic: topic, Key: nil, Value: sarama.StringEncoder("test")}
}
if producer.IsTransactional() {
err := producer.CommitTxn()
if err != nil {
log.Printf("Producer: unable to commit txn %s\n", err)
for {
if producer.TxnStatus()&sarama.ProducerTxnFlagFatalError != 0 {
// fatal error. need to recreate producer.
log.Printf("Producer: producer is in a fatal state, need to recreate it")
break
}
if producer.TxnStatus()&sarama.ProducerTxnFlagAbortableError != 0 {
err = producer.AbortTxn()
if err != nil {
log.Printf("Producer: unable to abort transaction: %+v", err)
continue
}
break
}
// if not you can retry
err = producer.CommitTxn()
if err != nil {
log.Printf("Producer: unable to commit txn %s\n", err)
continue
}
}
return
}
} else {
var i int64
for i = 0; i < recordsNumber; i++ {
<-producer.Successes()
}
}
recordsRate.Mark(recordsNumber)
}
type producerProvider struct {
transactionIdGenerator int32
producersLock sync.Mutex
producers []sarama.AsyncProducer
producerProvider func() sarama.AsyncProducer
}
func newProducerProvider(brokers []string, producerConfigurationProvider func() *sarama.Config) *producerProvider {
provider := &producerProvider{}
provider.producerProvider = func() sarama.AsyncProducer {
config := producerConfigurationProvider()
suffix := provider.transactionIdGenerator
if config.Producer.Transaction.ID != "" {
provider.transactionIdGenerator++
config.Producer.Transaction.ID = config.Producer.Transaction.ID + "-" + fmt.Sprint(suffix)
}
producer, err := sarama.NewAsyncProducer(brokers, config)
if err != nil {
return nil
}
return producer
}
return provider
}
func (p *producerProvider) borrow() (producer sarama.AsyncProducer) {
p.producersLock.Lock()
defer p.producersLock.Unlock()
if len(p.producers) == 0 {
for {
producer = p.producerProvider()
if producer != nil {
return
}
}
}
index := len(p.producers) - 1
producer = p.producers[index]
p.producers = p.producers[:index]
return
}
func (p *producerProvider) release(producer sarama.AsyncProducer) {
p.producersLock.Lock()
defer p.producersLock.Unlock()
if producer.TxnStatus()&sarama.ProducerTxnFlagInError != 0 {
// Try to close it
_ = producer.Close()
return
}
p.producers = append(p.producers, producer)
}
func (p *producerProvider) clear() {
p.producersLock.Lock()
defer p.producersLock.Unlock()
for _, producer := range p.producers {
producer.Close()
}
p.producers = p.producers[:0]
}