feat: optimise kafka writing

Author: ZakShearman

internal/kafka/writer.go

@@ -9,6 +9,7 @@ import (
 	"go.uber.org/zap"
 	"google.golang.org/protobuf/proto"
 	"message-handler/internal/config"
+	"time"
 )
 
 const writeTopic = "message-handler"
@@ -24,12 +25,13 @@ type kafkaNotifier struct {
 
 func NewKafkaNotifier(cfg *config.KafkaConfig, logger *zap.SugaredLogger) Notifier {
 	w := &kafka.Writer{
-		Addr:        kafka.TCP(fmt.Sprintf("%s:%d", cfg.Host, cfg.Port)),
-		Topic:       writeTopic,
-		Balancer:    &kafka.LeastBytes{},
-		Async:       true,
-		BatchSize:   1,
-		ErrorLogger: kafka.LoggerFunc(logger.Errorw),
+		Addr:         kafka.TCP(fmt.Sprintf("%s:%d", cfg.Host, cfg.Port)),
+		Topic:        writeTopic,
+		Balancer:     &kafka.LeastBytes{},
+		Async:        true,
+		BatchSize:    100,
+		BatchTimeout: 100 * time.Millisecond,
+		ErrorLogger:  kafka.LoggerFunc(logger.Errorw),
 	}
 
 	return &kafkaNotifier{w: w}