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jaeger_marshaler.go
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jaeger_marshaler.go
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// Copyright 2020 The OpenTelemetry Authors
//
// Licensed 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:https://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 kafkaexporter // import "github.com/open-telemetry/opentelemetry-collector-contrib/exporter/kafkaexporter"
import (
"bytes"
"github.com/Shopify/sarama"
"github.com/gogo/protobuf/jsonpb"
jaegerproto "github.com/jaegertracing/jaeger/model"
"go.opentelemetry.io/collector/model/pdata"
"go.uber.org/multierr"
"github.com/open-telemetry/opentelemetry-collector-contrib/pkg/translator/jaeger"
)
type jaegerMarshaler struct {
marshaler jaegerSpanMarshaler
}
var _ TracesMarshaler = (*jaegerMarshaler)(nil)
func (j jaegerMarshaler) Marshal(traces pdata.Traces, topic string) ([]*sarama.ProducerMessage, error) {
batches, err := jaeger.ProtoFromTraces(traces)
if err != nil {
return nil, err
}
var messages []*sarama.ProducerMessage
var errs error
for _, batch := range batches {
for _, span := range batch.Spans {
span.Process = batch.Process
bts, err := j.marshaler.marshal(span)
// continue to process spans that can be serialized
if err != nil {
errs = multierr.Append(errs, err)
continue
}
key := []byte(span.TraceID.String())
messages = append(messages, &sarama.ProducerMessage{
Topic: topic,
Value: sarama.ByteEncoder(bts),
Key: sarama.ByteEncoder(key),
})
}
}
return messages, errs
}
func (j jaegerMarshaler) Encoding() string {
return j.marshaler.encoding()
}
type jaegerSpanMarshaler interface {
marshal(span *jaegerproto.Span) ([]byte, error)
encoding() string
}
type jaegerProtoSpanMarshaler struct {
}
var _ jaegerSpanMarshaler = (*jaegerProtoSpanMarshaler)(nil)
func (p jaegerProtoSpanMarshaler) marshal(span *jaegerproto.Span) ([]byte, error) {
return span.Marshal()
}
func (p jaegerProtoSpanMarshaler) encoding() string {
return "jaeger_proto"
}
type jaegerJSONSpanMarshaler struct {
pbMarshaler *jsonpb.Marshaler
}
var _ jaegerSpanMarshaler = (*jaegerJSONSpanMarshaler)(nil)
func newJaegerJSONMarshaler() *jaegerJSONSpanMarshaler {
return &jaegerJSONSpanMarshaler{
pbMarshaler: &jsonpb.Marshaler{},
}
}
func (p jaegerJSONSpanMarshaler) marshal(span *jaegerproto.Span) ([]byte, error) {
out := new(bytes.Buffer)
err := p.pbMarshaler.Marshal(out, span)
return out.Bytes(), err
}
func (p jaegerJSONSpanMarshaler) encoding() string {
return "jaeger_json"
}