func NewKafka(numberOfMessages int, testLatency bool) *Kafka {
config := sarama.NewConfig()
client, _ := sarama.NewClient([]string{"localhost:9092"}, config)
topic := "test"
pub, _ := sarama.NewAsyncProducer([]string{"localhost:9092"}, config)
consumer, _ := sarama.NewConsumerFromClient(client)
sub, _ := consumer.ConsumePartition(topic, 0, sarama.OffsetNewest)
var handler benchmark.MessageHandler
if testLatency {
handler = &benchmark.LatencyMessageHandler{
NumberOfMessages: numberOfMessages,
Latencies: []float32{},
}
} else {
handler = &benchmark.ThroughputMessageHandler{NumberOfMessages: numberOfMessages}
}
return &Kafka{
handler: handler,
client: client,
pub: pub,
sub: sub,
topic: topic,
}
}
func CreateKafkaTopic() *KafkaTopic {
client, err := sarama.NewClient([]string{"kafka:9092"}, sarama.NewConfig())
if err != nil {
panic(err)
} else {
fmt.Printf("Kafka Client connected: %v\n", client)
}
topic := "http-request"
producer, err := sarama.NewAsyncProducerFromClient(client)
if err != nil {
panic(err)
} else {
fmt.Printf("Kafka Producer connected: %v\n", producer)
}
producable := producer.Input()
consumer, err := sarama.NewConsumerFromClient(client)
if err != nil {
panic(err)
} else {
fmt.Printf("Kafka Consumer connected: %v\n", consumer)
}
consumable, err := consumer.ConsumePartition(topic, 0, 0)
if err != nil {
panic(err)
}
return &KafkaTopic{client, topic, producer, producable, consumer, consumable}
}
func getMasterConsumer(client sarama.Client) sarama.Consumer {
//fmt.Println("Getting consumer.")
master, err := sarama.NewConsumerFromClient(client)
if err != nil {
panic(err)
}
return master
}
func runConsume(cmd *Command, args []string) {
brokers := brokers()
config := sarama.NewConfig()
config.ClientID = "k consume"
config.Consumer.Return.Errors = true
client, err := sarama.NewClient(brokers, config)
must(err)
defer client.Close()
consumer, err := sarama.NewConsumerFromClient(client)
must(err)
defer consumer.Close()
signals := make(chan os.Signal, 1)
defer close(signals)
signal.Notify(signals, os.Interrupt)
// calculate a starting offset
_, newestOffset := offsets(client, topic, partition)
must(err)
startingOffset := newestOffset
if offset < 0 {
startingOffset = newestOffset + offset
} else if offset > 0 {
startingOffset = offset
}
// TODO: support consuming all partitions
fmt.Fprintf(os.Stderr, "Using starting offset: %d\n", startingOffset)
partConsumer, err := consumer.ConsumePartition(topic, partition, startingOffset)
must(err)
defer partConsumer.Close()
var received, errors int
consumerLoop:
for {
select {
case msg := <-partConsumer.Messages():
if msg.Key != nil {
fmt.Printf("%s\t", string(msg.Key))
}
fmt.Println(string(msg.Value))
received++
if n > 0 && received >= n {
break consumerLoop
}
case err := <-partConsumer.Errors():
fmt.Fprintf(os.Stderr, "Failed to receive message: %s\n", err)
errors++
case <-signals:
break consumerLoop
}
}
fmt.Fprintf(os.Stderr, "Messages received: %d, errors: %d\n", received, errors)
}
// Subscribe prepares the peer to consume messages.
func (k *Peer) Subscribe() error {
consumer, err := sarama.NewConsumerFromClient(k.client)
if err != nil {
return err
}
pc, err := consumer.ConsumePartition(topic, 0, sarama.OffsetNewest)
if nil != err {
return err
}
k.consumer = pc
return nil
}
func (this *Peek) simpleConsumeTopic(zkcluster *zk.ZkCluster, kfk sarama.Client, topic string, partitionId int32,
msgCh chan *sarama.ConsumerMessage) {
consumer, err := sarama.NewConsumerFromClient(kfk)
if err != nil {
panic(err)
}
defer consumer.Close()
if partitionId == -1 {
// all partitions
partitions, err := kfk.Partitions(topic)
if err != nil {
panic(err)
}
for _, p := range partitions {
offset := this.offset
if this.lastN > 0 {
latestOffset, err := kfk.GetOffset(topic, p, sarama.OffsetNewest)
swallow(err)
oldestOffset, err := kfk.GetOffset(topic, p, sarama.OffsetOldest)
swallow(err)
offset = latestOffset - this.lastN
if offset < oldestOffset {
offset = oldestOffset
}
if offset == 0 {
// no message in store
return
}
}
go this.consumePartition(zkcluster, kfk, consumer, topic, p, msgCh, offset)
}
} else {
offset := this.offset
if this.lastN > 0 {
latestOffset, err := kfk.GetOffset(topic, partitionId, sarama.OffsetNewest)
swallow(err)
offset = latestOffset - this.lastN
if offset < 0 {
offset = sarama.OffsetOldest
}
}
this.consumePartition(zkcluster, kfk, consumer, topic, partitionId, msgCh, offset)
}
}
func New(kfkConn sarama.Client, transmitter Transmitter) (*ListenHandler, error) {
consumer, err := sarama.NewConsumerFromClient(kfkConn)
if err != nil {
return nil, fmt.Errorf("Failed to create Kafka consumer: %v", err)
}
lh := &ListenHandler{
listenbus: make(chan chan<- listenRequest),
transmitter: transmitter,
consumer: consumer,
kill: killchan.New(),
dead: killchan.New(),
}
go lh.run()
return lh, nil
}
func main() {
flag.Parse()
if *verbose {
sarama.Logger = logger
}
config := sarama.NewConfig()
config.Producer.Return.Successes = true
config.Producer.Return.Errors = true
config.Consumer.Return.Errors = true
client, err := sarama.NewClient(strings.Split(*brokerList, ","), config)
if err != nil {
logger.Fatalln("Failed to start Kafka client:", err)
}
defer func() {
if err := client.Close(); err != nil {
logger.Println("Failed to close client:", err)
}
}()
producer, err := sarama.NewAsyncProducerFromClient(client)
if err != nil {
logger.Fatalln("Failed to start Kafka producer:", err)
}
consumer, err := sarama.NewConsumerFromClient(client)
if err != nil {
logger.Fatalln("Failed to start Kafka consumer:", err)
}
signal.Notify(shutdown, os.Interrupt, os.Kill, syscall.SIGHUP, syscall.SIGTERM)
expectations := make(chan *sarama.ProducerMessage, ExpectationBufferSize)
started := time.Now()
var verifierWg sync.WaitGroup
verifierWg.Add(2)
go expectationProducer(producer, expectations, &verifierWg)
go expectationConsumer(consumer, expectations, &verifierWg)
verifierWg.Wait()
stats.Print()
logger.Println()
logger.Printf("Done after %0.2fs.\n", float64(time.Since(started))/float64(time.Second))
}
// NewConsumer initializes a new consumer
func NewConsumer(addrs []string, groupID string, topics []string, config *Config) (*Consumer, error) {
if config == nil {
config = NewConfig()
}
if err := config.Validate(); err != nil {
return nil, err
}
client, err := sarama.NewClient(addrs, &config.Config)
if err != nil {
return nil, err
}
csmr, err := sarama.NewConsumerFromClient(client)
if err != nil {
_ = client.Close()
return nil, err
}
c := &Consumer{
config: config,
client: client,
csmr: csmr,
subs: newPartitionMap(),
groupID: groupID,
topics: topics,
dying: make(chan none),
dead: make(chan none),
errors: make(chan error, config.ChannelBufferSize),
messages: make(chan *sarama.ConsumerMessage, config.ChannelBufferSize),
notifications: make(chan *Notification, 1),
}
if err := c.selectBroker(); err != nil {
_ = client.Close()
return nil, err
}
go c.mainLoop()
return c, nil
}
func (this *WatchAppError) consumeAppErrLogs(msgChan chan<- *sarama.ConsumerMessage) error {
var (
cluster = os.Getenv("APPLOG_CLUSTER")
topic = os.Getenv("APPLOG_TOPIC")
)
if cluster == "" || topic == "" {
return fmt.Errorf("empty cluster/topic params provided, kateway.apperr disabled")
}
zkcluster := this.Zkzone.NewCluster(cluster)
brokerList := zkcluster.BrokerList()
if len(brokerList) == 0 {
return fmt.Errorf("cluster[%s] has empty brokers", cluster)
}
kfk, err := sarama.NewClient(brokerList, sarama.NewConfig())
if err != nil {
return err
}
defer kfk.Close()
consumer, err := sarama.NewConsumerFromClient(kfk)
if err != nil {
return err
}
defer consumer.Close()
partitions, err := kfk.Partitions(topic)
if err != nil {
return err
}
var wg sync.WaitGroup
for _, p := range partitions {
wg.Add(1)
go this.consumePartition(zkcluster, consumer, topic, p, sarama.OffsetNewest, msgChan, &wg)
}
wg.Wait()
return nil
}
func (f *File) reconsume(offset int64) error {
if err := f.dir.reconnectKafkaIfNecessary(); err != nil {
return err
}
consumer, err := sarama.NewConsumerFromClient(f.dir.Client)
if err != nil {
log.Error(err)
return err
}
cp, err := consumer.ConsumePartition(f.topic, f.partitionId, offset)
if err != nil {
log.Error(err)
return err
}
f.consumer = cp
return nil
}
func Consume() {
config := sarama.NewConfig()
//config.ChannelBufferSize =
master, _ := sarama.NewClient([]string{"localhost:9095"}, config)
cmas, _ := sarama.NewConsumerFromClient(master)
offsetmanager, _ := sarama.NewOffsetManagerFromClient("test2", master)
part_man, _ := offsetmanager.ManagePartition("tt.test", 1)
//part_man.MarkOffset(0, "tt.test")
off1, mata1 := part_man.NextOffset()
fmt.Println(off1)
fmt.Println(mata1)
csm, _ := cmas.ConsumePartition("tt.test", 1, off1)
//csm.Messages
//Loop:
for i := 0; i < 200; i++ {
select {
case message := <-csm.Messages():
off1++
part_man.MarkOffset(off1, "tt.test")
fmt.Println(message)
case err := <-csm.Errors():
fmt.Println(err)
//csm.Close()
// break Loop
}
}
part_man.MarkOffset(off1, "tt.test")
csm.Close()
fmt.Println(off1)
part_man.Close()
//part_man2, _ := offsetmanager.ManagePartition("syslog-ng", 0)
//off2, mata2 := part_man2.NextOffset()
//part_man.MarkOffset(off2, "syslog-ng")
//fmt.Println(off2)
//fmt.Println(mata2)
cmas.Close()
master.Close()
}
func NewKafkaClient(app *ApplicationContext, cluster string) (*KafkaClient, error) {
// Set up sarama config from profile
clientConfig := sarama.NewConfig()
profile := app.Config.Clientprofile[app.Config.Kafka[cluster].Clientprofile]
clientConfig.ClientID = profile.ClientID
clientConfig.Net.TLS.Enable = profile.TLS
clientConfig.Net.TLS.Config = &tls.Config{}
clientConfig.Net.TLS.Config.InsecureSkipVerify = profile.TLSNoVerify
sclient, err := sarama.NewClient(app.Config.Kafka[cluster].Brokers, clientConfig)
if err != nil {
return nil, err
}
// Create sarama master consumer
master, err := sarama.NewConsumerFromClient(sclient)
if err != nil {
sclient.Close()
return nil, err
}
client := &KafkaClient{
app: app,
cluster: cluster,
client: sclient,
masterConsumer: master,
requestChannel: make(chan *BrokerTopicRequest),
messageChannel: make(chan *sarama.ConsumerMessage),
errorChannel: make(chan *sarama.ConsumerError),
wgFanIn: sync.WaitGroup{},
wgProcessor: sync.WaitGroup{},
topicMap: make(map[string]int),
topicMapLock: sync.RWMutex{},
}
// Start the main processor goroutines for __consumer_offset messages
client.wgProcessor.Add(2)
go func() {
defer client.wgProcessor.Done()
for msg := range client.messageChannel {
go client.processConsumerOffsetsMessage(msg)
}
}()
go func() {
defer client.wgProcessor.Done()
for err := range client.errorChannel {
log.Errorf("Consume error on %s:%v: %v", err.Topic, err.Partition, err.Err)
}
}()
// Start goroutine to handle topic metadata requests. Do this first because the getOffsets call needs this working
client.RefreshTopicMap()
go func() {
for r := range client.requestChannel {
client.getPartitionCount(r)
}
}()
// Now get the first set of offsets and start a goroutine to continually check them
client.getOffsets()
client.brokerOffsetTicker = time.NewTicker(time.Duration(client.app.Config.Tickers.BrokerOffsets) * time.Second)
go func() {
for _ = range client.brokerOffsetTicker.C {
client.getOffsets()
}
}()
// Get a partition count for the consumption topic
partitions, err := client.client.Partitions(client.app.Config.Kafka[client.cluster].OffsetsTopic)
if err != nil {
return nil, err
}
// Start consumers for each partition with fan in
client.partitionConsumers = make([]sarama.PartitionConsumer, len(partitions))
log.Infof("Starting consumers for %v partitions of %s in cluster %s", len(partitions), client.app.Config.Kafka[client.cluster].OffsetsTopic, client.cluster)
for i, partition := range partitions {
pconsumer, err := client.masterConsumer.ConsumePartition(client.app.Config.Kafka[client.cluster].OffsetsTopic, partition, sarama.OffsetNewest)
if err != nil {
return nil, err
}
client.partitionConsumers[i] = pconsumer
client.wgFanIn.Add(2)
go func() {
defer client.wgFanIn.Done()
for msg := range pconsumer.Messages() {
client.messageChannel <- msg
}
}()
go func() {
defer client.wgFanIn.Done()
for err := range pconsumer.Errors() {
client.errorChannel <- err
}
}()
}
return client, nil
}
func main() {
flag.Parse()
if *brokers == "" {
flag.PrintDefaults()
os.Exit(1)
}
brokerList := strings.Split(*brokers, ",")
cfg := sarama.NewConfig()
kafkaCllient, e := sarama.NewClient(brokerList, cfg)
if e != nil {
panic(e)
}
consumer, e := sarama.NewConsumerFromClient(kafkaCllient)
if e != nil {
panic(e)
}
pConsumer, _ := consumer.ConsumePartition("sensors", 0, 0)
u, _ := url.Parse("http://localhost:8086")
influxConfig := influx.Config{
URL: *u,
Username: "******",
Password: "******",
}
influxClient, _ := influx.NewClient(influxConfig)
influxClient.Ping()
for msg := range pConsumer.Messages() {
// Decode the SensorData from protobuf string data.
data := &sensory_proto.SensorData{}
proto.Unmarshal(msg.Value, data)
pts := make([]influx.Point, len(data.Reads))
for i, read := range data.Reads {
readType := typeToString[read.Type]
var tm time.Time
if read.Timestamp == 0 {
tm = time.Now()
} else {
print(intVal)
tm = time.Unix(int64(read.Timestamp), 0)
}
fields := make(map[string]interface{})
var (
intVal *int32 = &read.Intval
fVal *float32 = &read.Floatval
)
if intVal != nil {
fields["value"] = *intVal
}
if fVal != nil {
fields["value"] = *fVal
}
if sender, ok := senderToString[data.SenderId]; ok {
fields["sender"] = sender
}
point := influx.Point{
Measurement: readType,
Fields: fields,
Tags: map[string]string{},
Time: tm,
}
pts[i] = point
fmt.Printf("Sender ID %d type(%s) int(%d) float(%f)\n", data.SenderId, readType, read.Intval, read.Floatval)
}
bps := influx.BatchPoints{
Points: pts,
Database: "sensors",
RetentionPolicy: "default",
}
_, err := influxClient.Write(bps)
if err != nil {
print("ERROR")
fmt.Println(err)
}
}
}
func main() {
flag.Parse()
if *verbose {
sarama.Logger = log.New(os.Stdout, "[Sarama]", log.LstdFlags)
}
brokers := getBrokers(*brokerIP, *brokerPorts)
config := sarama.NewConfig()
config.Consumer.Return.Errors = true
client, err := sarama.NewClient(brokers, config)
if err != nil {
logger.Fatal(err)
}
defer func() {
if err := client.Close(); err != nil {
logger.Fatal(err)
}
}()
topic := "my_topic"
partitions, err := client.Partitions(topic)
if err != nil {
logger.Fatal(err)
}
master, err := sarama.NewConsumerFromClient(client)
if err != nil {
logger.Fatal(err)
}
defer func() {
if err := master.Close(); err != nil {
logger.Fatal(err)
}
}()
var wg sync.WaitGroup
wg.Add(len(partitions))
for _, partition := range partitions {
go func(master sarama.Consumer, partition int32) {
defer wg.Done()
consumer, err := master.ConsumePartition(topic, partition, sarama.OffsetNewest)
if err != nil {
logger.Fatal(err)
}
signals := make(chan os.Signal, 1)
signal.Notify(signals, os.Interrupt)
// Count how many message processed
msgCount := 0
// Get signnal for finish
doneCh := make(chan struct{})
go func() {
for {
select {
case err := <-consumer.Errors():
logger.Println(err)
case msg := <-consumer.Messages():
msgCount++
logger.Println("Received messages", string(msg.Key), string(msg.Value))
case <-signals:
logger.Println("Interrupt is detected")
doneCh <- struct{}{}
}
}
}()
<-doneCh
fmt.Println("Processed", msgCount, "messages")
}(master, partition)
}
wg.Wait()
}
