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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,86 @@ | ||
| // Unless explicitly stated otherwise all files in this repository are licensed | ||
| // under the Apache License Version 2.0. | ||
| // This product includes software developed at Datadog (https://www.datadoghq.com/). | ||
| // Copyright 2024 Datadog, Inc. | ||
|
|
||
| package tracing | ||
|
|
||
| import ( | ||
| "context" | ||
|
|
||
| "gopkg.in/DataDog/dd-trace-go.v1/datastreams" | ||
| "gopkg.in/DataDog/dd-trace-go.v1/datastreams/options" | ||
| "gopkg.in/DataDog/dd-trace-go.v1/ddtrace/tracer" | ||
| ) | ||
|
|
||
| func (tr *Tracer) SetConsumeDSMCheckpoint(msg Message) { | ||
| if !tr.dataStreamsEnabled || msg == nil { | ||
| return | ||
| } | ||
| edges := []string{"direction:in", "topic:" + msg.GetTopic(), "type:kafka"} | ||
| if tr.kafkaCfg.ConsumerGroupID != "" { | ||
| edges = append(edges, "group:"+tr.kafkaCfg.ConsumerGroupID) | ||
| } | ||
| carrier := NewMessageCarrier(msg) | ||
| ctx, ok := tracer.SetDataStreamsCheckpointWithParams( | ||
| datastreams.ExtractFromBase64Carrier(context.Background(), carrier), | ||
| options.CheckpointParams{PayloadSize: getConsumerMsgSize(msg)}, | ||
| edges..., | ||
| ) | ||
| if !ok { | ||
| return | ||
| } | ||
| datastreams.InjectToBase64Carrier(ctx, carrier) | ||
| if tr.kafkaCfg.ConsumerGroupID != "" { | ||
| // only track Kafka lag if a consumer group is set. | ||
| // since there is no ack mechanism, we consider that messages read are committed right away. | ||
| tracer.TrackKafkaCommitOffset(tr.kafkaCfg.ConsumerGroupID, msg.GetTopic(), int32(msg.GetPartition()), msg.GetOffset()) | ||
| } | ||
| } | ||
|
|
||
| func (tr *Tracer) SetProduceDSMCheckpoint(msg Message, writer Writer) { | ||
| if !tr.dataStreamsEnabled || msg == nil { | ||
| return | ||
| } | ||
|
|
||
| var topic string | ||
| if writer.GetTopic() != "" { | ||
| topic = writer.GetTopic() | ||
| } else { | ||
| topic = msg.GetTopic() | ||
| } | ||
|
|
||
| edges := []string{"direction:out", "topic:" + topic, "type:kafka"} | ||
| carrier := MessageCarrier{msg} | ||
| ctx, ok := tracer.SetDataStreamsCheckpointWithParams( | ||
| datastreams.ExtractFromBase64Carrier(context.Background(), carrier), | ||
| options.CheckpointParams{PayloadSize: getProducerMsgSize(msg)}, | ||
| edges..., | ||
| ) | ||
| if !ok { | ||
| return | ||
| } | ||
|
|
||
| // Headers will be dropped if the current protocol does not support them | ||
| datastreams.InjectToBase64Carrier(ctx, carrier) | ||
| } | ||
|
|
||
| func getProducerMsgSize(msg Message) (size int64) { | ||
| for _, header := range msg.GetHeaders() { | ||
| size += int64(len(header.GetKey()) + len(header.GetValue())) | ||
| } | ||
| if msg.GetValue() != nil { | ||
| size += int64(len(msg.GetValue())) | ||
| } | ||
| if msg.GetKey() != nil { | ||
| size += int64(len(msg.GetKey())) | ||
| } | ||
| return size | ||
| } | ||
|
|
||
| func getConsumerMsgSize(msg Message) (size int64) { | ||
| for _, header := range msg.GetHeaders() { | ||
| size += int64(len(header.GetKey()) + len(header.GetValue())) | ||
| } | ||
| return size + int64(len(msg.GetValue())+len(msg.GetKey())) | ||
| } |
52 changes: 52 additions & 0 deletions
52
contrib/segmentio/kafka.go.v0/internal/tracing/message_carrier.go
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,52 @@ | ||
| // Unless explicitly stated otherwise all files in this repository are licensed | ||
| // under the Apache License Version 2.0. | ||
| // This product includes software developed at Datadog (https://www.datadoghq.com/). | ||
| // Copyright 2024 Datadog, Inc. | ||
|
|
||
| package tracing | ||
|
|
||
| import ( | ||
| "gopkg.in/DataDog/dd-trace-go.v1/ddtrace/tracer" | ||
| ) | ||
|
|
||
| // A MessageCarrier implements TextMapReader/TextMapWriter for extracting/injecting traces on a kafka.Message | ||
| type MessageCarrier struct { | ||
| msg Message | ||
| } | ||
|
|
||
| var _ interface { | ||
| tracer.TextMapReader | ||
| tracer.TextMapWriter | ||
| } = (*MessageCarrier)(nil) | ||
|
|
||
| // ForeachKey conforms to the TextMapReader interface. | ||
| func (c MessageCarrier) ForeachKey(handler func(key, val string) error) error { | ||
| for _, h := range c.msg.GetHeaders() { | ||
| err := handler(h.GetKey(), string(h.GetValue())) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| } | ||
| return nil | ||
| } | ||
|
|
||
| // Set implements TextMapWriter | ||
| func (c MessageCarrier) Set(key, val string) { | ||
| headers := c.msg.GetHeaders() | ||
| // ensure uniqueness of keys | ||
| for i := 0; i < len(headers); i++ { | ||
| if headers[i].GetKey() == key { | ||
| headers = append(headers[:i], headers[i+1:]...) | ||
| i-- | ||
| } | ||
| } | ||
| headers = append(headers, KafkaHeader{ | ||
| Key: key, | ||
| Value: []byte(val), | ||
| }) | ||
| c.msg.SetHeaders(headers) | ||
| } | ||
|
|
||
| func NewMessageCarrier(msg Message) MessageCarrier { | ||
| return MessageCarrier{msg: msg} | ||
| } |
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