marshaler.go

// Copyright 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://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/Shopify/sarama"

	"go.opentelemetry.io/collector/internal/otlp"
	"go.opentelemetry.io/collector/model/pdata"
)

// TracesMarshaler marshals traces into Message array.
type TracesMarshaler interface {
	// Marshal serializes spans into sarama's ProducerMessages
	Marshal(traces pdata.Traces, topic string) ([]*sarama.ProducerMessage, error)

	// Encoding returns encoding name
	Encoding() string
}

// MetricsMarshaler marshals metrics into Message array
type MetricsMarshaler interface {
	// Marshal serializes metrics into sarama's ProducerMessages
	Marshal(metrics pdata.Metrics, topic string) ([]*sarama.ProducerMessage, error)

	// Encoding returns encoding name
	Encoding() string
}

// LogsMarshaler marshals logs into Message array
type LogsMarshaler interface {
	// Marshal serializes logs into sarama's ProducerMessages
	Marshal(logs pdata.Logs, topic string) ([]*sarama.ProducerMessage, error)

	// Encoding returns encoding name
	Encoding() string
}

// tracesMarshalers returns map of supported encodings with TracesMarshaler.
func tracesMarshalers() map[string]TracesMarshaler {
	otlpPb := newPdataTracesMarshaler(otlp.NewProtobufTracesMarshaler(), defaultEncoding)
	jaegerProto := jaegerMarshaler{marshaler: jaegerProtoSpanMarshaler{}}
	jaegerJSON := jaegerMarshaler{marshaler: newJaegerJSONMarshaler()}
	return map[string]TracesMarshaler{
		otlpPb.Encoding():      otlpPb,
		jaegerProto.Encoding(): jaegerProto,
		jaegerJSON.Encoding():  jaegerJSON,
	}
}

// metricsMarshalers returns map of supported encodings and MetricsMarshaler
func metricsMarshalers() map[string]MetricsMarshaler {
	otlpPb := newPdataMetricsMarshaler(otlp.NewProtobufMetricsMarshaler(), defaultEncoding)
	return map[string]MetricsMarshaler{
		otlpPb.Encoding(): otlpPb,
	}
}

// logsMarshalers returns map of supported encodings and LogsMarshaler
func logsMarshalers() map[string]LogsMarshaler {
	otlpPb := newPdataLogsMarshaler(otlp.NewProtobufLogsMarshaler(), defaultEncoding)
	return map[string]LogsMarshaler{
		otlpPb.Encoding(): otlpPb,
	}
}