[GitHub] [skywalking-satellite] wu-sheng commented on a diff in pull request #128: Kafka forwards

["wu-sheng (via GitHub)" <gi...@apache.org>]

wu-sheng commented on code in PR #128:
URL: https://github.com/apache/skywalking-satellite/pull/128#discussion_r1136908307


##########
plugins/forwarder/kafka/nativetracing/forwarder.go:
##########
@@ -0,0 +1,121 @@
+// Licensed to Apache Software Foundation (ASF) under one or more contributor
+// license agreements. See the NOTICE file distributed with
+// this work for additional information regarding copyright
+// ownership. Apache Software Foundation (ASF) licenses this file to you under
+// the Apache License, Version 2.0 (the "License"); you may
+// not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
+package nativetracing
+
+import (
+	"fmt"
+	"reflect"
+	v3 "skywalking.apache.org/repo/goapi/collect/language/agent/v3"
+
+	"github.com/Shopify/sarama"
+	"github.com/apache/skywalking-satellite/internal/pkg/config"
+	"github.com/apache/skywalking-satellite/internal/satellite/event"
+	"google.golang.org/protobuf/proto"
+
+	v1 "skywalking.apache.org/repo/goapi/satellite/data/v1"
+)
+
+const (
+	Name     = "native-tracing-kafka-forwarder"
+	ShowName = "Native Tracing Kafka Forwarder"
+)
+
+type Forwarder struct {
+	config.CommonFields
+	Topic    string `mapstructure:"topic"` // The forwarder topic.
+	producer sarama.SyncProducer
+}
+
+func (f *Forwarder) Name() string {
+	return Name
+}
+
+func (f *Forwarder) ShowName() string {
+	return ShowName
+}
+
+func (f *Forwarder) Description() string {
+	return "This is a synchronization Kafka forwarder with the SkyWalking native log protocol."
+}
+
+func (f *Forwarder) DefaultConfig() string {
+	return `
+# The remote topic. 
+topic: "skywalking-segments"
+`
+}
+
+func (f *Forwarder) Prepare(connection interface{}) error {
+	client, ok := connection.(sarama.Client)
+	if !ok {
+		return fmt.Errorf("the %s only accepts a grpc client, but received a %s",
+			f.Name(), reflect.TypeOf(connection).String())
+	}
+	producer, err := sarama.NewSyncProducerFromClient(client)
+	if err != nil {
+		return err
+	}
+	f.producer = producer
+	return nil
+}
+
+func (f *Forwarder) Forward(batch event.BatchEvents) error {
+	var message []*sarama.ProducerMessage
+	for _, e := range batch {
+		switch data := e.GetData().(type) {
+		case *v1.SniffData_Segment:
+			segmentObject := &v3.SegmentObject{}
+			err := proto.Unmarshal(data.Segment, segmentObject)
+			if err != nil {
+				return err
+			}
+
+			message = append(message, &sarama.ProducerMessage{
+				Topic: f.Topic,
+				Key:   sarama.StringEncoder(segmentObject.GetTraceSegmentId()),
+				Value: sarama.ByteEncoder(data.Segment),
+			})
+		case *v1.SniffData_SpanAttachedEvent:
+			message = append(message, &sarama.ProducerMessage{

Review Comment:
   `SniffData_SpanAttachedEvent` is from ebpf agent, skywalking-rover project.



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