httpsink_exporter.go

// Copyright Splunk, Inc.
// 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 httpsinkexporter

import (
	"context"

	"github.com/gogo/protobuf/jsonpb"
	"github.com/jaegertracing/jaeger/model"
	jaegertranslator "github.com/open-telemetry/opentelemetry-collector-contrib/pkg/translator/jaeger"
	"go.opentelemetry.io/collector/component"
	"go.opentelemetry.io/collector/pdata/pmetric"
	"go.opentelemetry.io/collector/pdata/ptrace"
	"go.uber.org/zap"
)

var spanMarshaler = &jsonpb.Marshaler{}
var metricMarshaler = &pmetric.JSONMarshaler{}

// httpSinkExporter ...
type httpSinkExporter struct {
	sink *sink

	metrics chan pmetric.Metrics
	spans   chan *model.Batch
}

func newExporter(logger *zap.Logger, endpoint string) *httpSinkExporter {
	logger.Warn("This component is deprecated and must be used for testing purposes only. It does not redact or filter any telemetry content it exposes and should not be used with production data.")
	return &httpSinkExporter{sink: newSink(logger, endpoint)}
}

func (e *httpSinkExporter) ConsumeTraces(_ context.Context, td ptrace.Traces) error {
	// TODO: replace jaeger with OTLP
	batches, err := jaegertranslator.ProtoFromTraces(td)
	if err != nil {
		return err
	}
	for _, batch := range batches {
		go func(b *model.Batch) {
			e.spans <- b
		}(batch)
	}
	return nil
}

func (e *httpSinkExporter) ConsumeMetrics(_ context.Context, md pmetric.Metrics) error {
	go func(m pmetric.Metrics) {
		e.metrics <- m
	}(md)
	return nil
}

func (e *httpSinkExporter) Start(ctx context.Context, _ component.Host) error {
	e.sink.start(ctx)
	go e.fanOutSpans()
	go e.fanOutMetrics()
	return nil
}

// Shutdown stops the exporter and is invoked during shutdown.
func (e *httpSinkExporter) Shutdown(ctx context.Context) error {
	return e.sink.shutdown(ctx)
}

func (e *httpSinkExporter) fanOutSpans() error {
	e.spans = make(chan *model.Batch)
	for {
		batch := <-e.spans
		clients := e.sink.clients(typeSpans)
		for _, c := range clients {
			if !c.stopped {
				go func(c *client) {
					c.spans <- batch
				}(c)
			}
		}
	}
}

func (e *httpSinkExporter) fanOutMetrics() error {
	e.metrics = make(chan pmetric.Metrics)
	for {
		metrics := <-e.metrics
		clients := e.sink.clients(typeMetrics)
		for _, c := range clients {
			if !c.stopped {
				go func(c *client) {
					c.metrics <- metrics
				}(c)
			}
		}
	}
}