fix: fix kafka writer configure (#3517)

Signed-off-by: Song Gao <disxiaofei@163.com>

Author: Yisaer

extensions/sinks/kafka/ext/kafka.go

@@ -47,11 +47,11 @@ type sinkConf struct {
 }
 
 type kafkaConf struct {
-	MaxAttempts  int             `json:"maxAttempts"`
-	RequiredACKs int             `json:"requiredACKs"`
-	Key          string          `json:"key"`
-	Headers      interface{}     `json:"headers"`
-	WriterConf   kafkaWriterConf `json:"writerConf"`
+	kafkaWriterConf
+	MaxAttempts  int         `json:"maxAttempts"`
+	RequiredACKs int         `json:"requiredACKs"`
+	Key          string      `json:"key"`
+	Headers      interface{} `json:"headers"`
 }
 
 type kafkaWriterConf struct {
@@ -101,7 +101,7 @@ func (m *kafkaSink) Configure(props map[string]interface{}) error {
 	}
 	m.tlsConfig = tlsConfig
 	kc := getDefaultKafkaConf()
-	if err := cast.MapToStruct(props, kc); err != nil {
+	if err := kc.configure(props); err != nil {
 		return err
 	}
 	m.kc = kc
@@ -112,15 +112,6 @@ func (m *kafkaSink) Configure(props map[string]interface{}) error {
 	return m.buildKafkaWriter()
 }
 
-func (m *kafkaSink) ConfigureBatch(batchSize int, lingerInterval time.Duration) {
-	if batchSize > 0 {
-		m.kc.WriterConf.BatchSize = batchSize
-	}
-	if lingerInterval > 0 {
-		m.kc.WriterConf.BatchTimeout = lingerInterval
-	}
-}
-
 func (m *kafkaSink) buildKafkaWriter() error {
 	mechanism, err := m.sc.GetMechanism()
 	if err != nil {
@@ -136,15 +127,15 @@ func (m *kafkaSink) buildKafkaWriter() error {
 		AllowAutoTopicCreation: true,
 		MaxAttempts:            m.kc.MaxAttempts,
 		RequiredAcks:           kafkago.RequiredAcks(m.kc.RequiredACKs),
-		BatchSize:              m.kc.WriterConf.BatchSize,
-		BatchBytes:             m.kc.WriterConf.BatchBytes,
-		BatchTimeout:           m.kc.WriterConf.BatchTimeout,
+		BatchSize:              m.kc.BatchSize,
+		BatchBytes:             m.kc.BatchBytes,
+		BatchTimeout:           m.kc.BatchTimeout,
 		Transport: &kafkago.Transport{
 			SASL: mechanism,
 			TLS:  m.tlsConfig,
 		},
 	}
-	conf.Log.Infof("kafka writer batchSize:%v, batchTimeout:%v", m.kc.WriterConf.BatchSize, m.kc.WriterConf.BatchTimeout.String())
+	conf.Log.Infof("kafka writer batchSize:%v, batchTimeout:%v", m.kc.BatchSize, m.kc.BatchTimeout.String())
 	m.writer = w
 	return nil
 }
@@ -332,11 +323,22 @@ func getDefaultKafkaConf() *kafkaConf {
 	c := &kafkaConf{
 		RequiredACKs: -1,
 		MaxAttempts:  1,
-		WriterConf: kafkaWriterConf{
-			BatchSize:    5000,
-			BatchTimeout: 200 * time.Millisecond,
-			BatchBytes:   1048576 * 10, // 10MB
-		},
+	}
+	c.kafkaWriterConf = kafkaWriterConf{
+		BatchSize: 5000,
+		// send batch ASAP
+		BatchTimeout: time.Microsecond,
+		BatchBytes:   1048576 * 10, // 10MB
 	}
 	return c
 }
+
+func (kc *kafkaConf) configure(props map[string]interface{}) error {
+	if err := cast.MapToStruct(props, kc); err != nil {
+		return err
+	}
+	if err := cast.MapToStruct(props, &kc.kafkaWriterConf); err != nil {
+		return err
+	}
+	return nil
+}

internal/topo/node/sink_node.go

@@ -17,7 +17,6 @@ package node
 import (
 	"fmt"
 	"sync"
-	"time"
 
 	"github.com/lf-edge/ekuiper/internal/binder/io"
 	"github.com/lf-edge/ekuiper/internal/conf"
@@ -555,11 +554,6 @@ func resendDataToSink(ctx api.StreamContext, sink api.Sink, outData interface{},
 	}
 }
 
-type batchConf struct {
-	BatchSize      int           `json:"batchSize"`
-	LingerInterval time.Duration `json:"lingerInterval"`
-}
-
 func getSink(name string, action map[string]interface{}) (api.Sink, error) {
 	var (
 		s   api.Sink
@@ -572,11 +566,6 @@ func getSink(name string, action map[string]interface{}) (api.Sink, error) {
 		if err != nil {
 			return nil, err
 		}
-		if bas, ok := s.(api.BatchAbleSink); ok {
-			bc := batchConf{}
-			cast.MapToStruct(newAction, &bc)
-			bas.ConfigureBatch(bc.BatchSize, bc.LingerInterval)
-		}
 		return s, nil
 	} else {
 		if err != nil {

internal/topo/planner/sink_planner.go

@@ -44,7 +44,7 @@ func buildActions(tp *topo.Topo, rule *api.Rule, inputs []api.Emitter) error {
 			}
 			// Split sink node
 			sinkName := fmt.Sprintf("%s_%d", name, i)
-			newInputs, err := splitSink(s, tp, inputs, sinkName, rule.Options, commonConf)
+			newInputs, err := splitSink(tp, inputs, sinkName, rule.Options, commonConf)
 			if err != nil {
 				return err
 			}
@@ -65,10 +65,7 @@ func fulfillProps(rule *api.Rule, props map[string]any) map[string]any {
 }
 
 // Split sink node according to the sink configuration. Return the new input emitters.
-func splitSink(sink api.Sink, tp *topo.Topo, inputs []api.Emitter, sinkName string, options *api.RuleOption, sc *node.SinkConf) ([]api.Emitter, error) {
-	if _, ok := sink.(api.BatchAbleSink); ok {
-		return inputs, nil
-	}
+func splitSink(tp *topo.Topo, inputs []api.Emitter, sinkName string, options *api.RuleOption, sc *node.SinkConf) ([]api.Emitter, error) {
 	index := 0
 	newInputs := inputs
 	// Batch enabled

pkg/api/stream.go

@@ -136,11 +136,6 @@ type LookupSource interface {
 	Closable
 }
 
-type BatchAbleSink interface {
-	Sink
-	ConfigureBatch(batchSize int, lingerDuration time.Duration)
-}
-
 type Sink interface {
 	// Open Should be sync function for normal case. The container will run it in go func
 	Open(ctx StreamContext) error