package main import ( "fmt" "kafka-sandbox/util" "math/rand" "os" "github.com/confluentinc/confluent-kafka-go/kafka" ) func main() { if len(os.Args) != 2 { fmt.Fprintf(os.Stderr, "Usage: %s \n", os.Args[0]) os.Exit(1) } configFile := os.Args[1] conf := util.ReadConfig(configFile) topic := "purchases" p, err := kafka.NewProducer(&conf) if err != nil { fmt.Printf("Failed to create producer: %s", err) os.Exit(1) } // Go-routine to handle message delivery reports and // possibly other event types (errors, stats, etc) go func() { for e := range p.Events() { switch ev := e.(type) { case *kafka.Message: if ev.TopicPartition.Error != nil { fmt.Printf("Failed to deliver message: %v\n", ev.TopicPartition) } else { fmt.Printf("Produced event to topic %s: key = %-10s value = %s\n", *ev.TopicPartition.Topic, string(ev.Key), string(ev.Value)) } } } }() users := [...]string{"eabara", "jsmith", "sgarcia", "jbernard", "htanaka", "awalther"} items := [...]string{"book", "alarm clock", "t-shirts", "gift card", "batteries"} for n := 0; n < 10; n++ { key := users[rand.Intn(len(users))] data := items[rand.Intn(len(items))] p.Produce(&kafka.Message{ TopicPartition: kafka.TopicPartition{Topic: &topic, Partition: kafka.PartitionAny}, Key: []byte(key), Value: []byte(data), }, nil) } // Wait for all messages to be delivered p.Flush(15 * 1000) p.Close() }