70 lines
1.4 KiB
Go
70 lines
1.4 KiB
Go
package main
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import (
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"context"
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"errors"
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"github.com/twmb/franz-go/pkg/kgo"
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"github.com/twmb/franz-go/pkg/kversion"
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"log"
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"os"
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"os/signal"
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"strings"
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)
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func main() {
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kafkaHost, ok := os.LookupEnv("KAFKA_HOST")
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if !ok {
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kafkaHost = "localhost:9092"
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}
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kafkaOptions := []kgo.Opt{
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kgo.MinVersions(kversion.V0_11_0()),
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kgo.SeedBrokers(strings.Split(kafkaHost, ",")...),
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kgo.ConsumeTopics("transactions"),
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}
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kafkaClient, err := kgo.NewClient(kafkaOptions...)
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if err != nil {
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log.Fatalf("initiating kafka client: %s", err.Error())
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}
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defer kafkaClient.Close()
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exitSignal := make(chan os.Signal, 1)
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signal.Notify(exitSignal, os.Interrupt)
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go func() {
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<-exitSignal
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kafkaClient.Close()
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}()
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log.Println("Ready, waiting for messages...")
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for {
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ctx := context.Background()
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fetches := kafkaClient.PollRecords(ctx, 128)
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switch {
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case fetches.IsClientClosed():
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break
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case fetches.Err() != nil:
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fetches.EachError(func(topic string, partition int32, err error) {
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if !errors.Is(err, context.DeadlineExceeded) && !errors.Is(err, context.Canceled) {
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log.Printf("Error: topic: %s, partition: %d, message: %v", topic, partition, err)
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}
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})
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continue
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}
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for _, msg := range fetches.Records() {
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err := consume(kafkaClient, msg.Value)
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if err != nil {
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log.Println(err)
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continue
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}
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log.Printf("Processed: %s", string(msg.Value))
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}
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}
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}
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