mirror of
https://github.com/buger/goreplay.git
synced 2024-04-21 12:32:02 +00:00
Dima GolomozyandGitHub
40946831b9
change package from `main -> goreplay` this will allow importing `goreplay` as a package
100 lines
2.6 KiB
Go
100 lines
2.6 KiB
Go
package goreplay
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import (
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"encoding/json"
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"github.com/buger/goreplay/internal/byteutils"
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"github.com/buger/goreplay/proto"
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"log"
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"strings"
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"time"
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"github.com/Shopify/sarama"
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"github.com/Shopify/sarama/mocks"
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)
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// KafkaOutput is used for sending payloads to kafka in JSON format.
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type KafkaOutput struct {
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config *OutputKafkaConfig
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producer sarama.AsyncProducer
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}
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// KafkaOutputFrequency in milliseconds
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const KafkaOutputFrequency = 500
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// NewKafkaOutput creates instance of kafka producer client with TLS config
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func NewKafkaOutput(_ string, config *OutputKafkaConfig, tlsConfig *KafkaTLSConfig) PluginWriter {
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c := NewKafkaConfig(&config.SASLConfig, tlsConfig)
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var producer sarama.AsyncProducer
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if mock, ok := config.producer.(*mocks.AsyncProducer); ok && mock != nil {
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producer = config.producer
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} else {
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c.Producer.RequiredAcks = sarama.WaitForLocal
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c.Producer.Compression = sarama.CompressionSnappy
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c.Producer.Flush.Frequency = KafkaOutputFrequency * time.Millisecond
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brokerList := strings.Split(config.Host, ",")
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var err error
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producer, err = sarama.NewAsyncProducer(brokerList, c)
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if err != nil {
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log.Fatalln("Failed to start Sarama(Kafka) producer:", err)
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}
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}
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o := &KafkaOutput{
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config: config,
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producer: producer,
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}
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// Start infinite loop for tracking errors for kafka producer.
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go o.ErrorHandler()
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return o
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}
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// ErrorHandler should receive errors
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func (o *KafkaOutput) ErrorHandler() {
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for err := range o.producer.Errors() {
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Debug(1, "Failed to write access log entry:", err)
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}
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}
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// PluginWrite writes a message to this plugin
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func (o *KafkaOutput) PluginWrite(msg *Message) (n int, err error) {
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var message sarama.StringEncoder
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if !o.config.UseJSON {
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message = sarama.StringEncoder(byteutils.SliceToString(msg.Meta) + byteutils.SliceToString(msg.Data))
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} else {
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mimeHeader := proto.ParseHeaders(msg.Data)
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header := make(map[string]string)
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for k, v := range mimeHeader {
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header[k] = strings.Join(v, ", ")
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}
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meta := payloadMeta(msg.Meta)
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req := msg.Data
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kafkaMessage := KafkaMessage{
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ReqURL: byteutils.SliceToString(proto.Path(req)),
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ReqType: byteutils.SliceToString(meta[0]),
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ReqID: byteutils.SliceToString(meta[1]),
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ReqTs: byteutils.SliceToString(meta[2]),
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ReqMethod: byteutils.SliceToString(proto.Method(req)),
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ReqBody: byteutils.SliceToString(proto.Body(req)),
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ReqHeaders: header,
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}
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jsonMessage, _ := json.Marshal(&kafkaMessage)
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message = sarama.StringEncoder(byteutils.SliceToString(jsonMessage))
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}
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o.producer.Input() <- &sarama.ProducerMessage{
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Topic: o.config.Topic,
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Value: message,
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}
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return len(message), nil
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}
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