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receiver.go
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receiver.go
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// Copyright The OpenTelemetry Authors
// SPDX-License-Identifier: Apache-2.0
package datadogreceiver // import "github.com/open-telemetry/opentelemetry-collector-contrib/receiver/datadogreceiver"
import (
"context"
"errors"
"fmt"
"net/http"
pb "github.com/DataDog/datadog-agent/pkg/proto/pbgo/trace"
"go.opentelemetry.io/collector/component"
"go.opentelemetry.io/collector/consumer"
"go.opentelemetry.io/collector/receiver"
"go.opentelemetry.io/collector/receiver/receiverhelper"
)
type datadogReceiver struct {
address string
config *Config
params receiver.CreateSettings
nextConsumer consumer.Traces
server *http.Server
tReceiver *receiverhelper.ObsReport
}
func newDataDogReceiver(config *Config, nextConsumer consumer.Traces, params receiver.CreateSettings) (receiver.Traces, error) {
instance, err := receiverhelper.NewObsReport(receiverhelper.ObsReportSettings{LongLivedCtx: false, ReceiverID: params.ID, Transport: "http", ReceiverCreateSettings: params})
if err != nil {
return nil, err
}
return &datadogReceiver{
params: params,
config: config,
nextConsumer: nextConsumer,
server: &http.Server{
ReadTimeout: config.ReadTimeout,
},
tReceiver: instance,
}, nil
}
func (ddr *datadogReceiver) Start(ctx context.Context, host component.Host) error {
ddmux := http.NewServeMux()
ddmux.HandleFunc("/v0.3/traces", ddr.handleTraces)
ddmux.HandleFunc("/v0.4/traces", ddr.handleTraces)
ddmux.HandleFunc("/v0.5/traces", ddr.handleTraces)
ddmux.HandleFunc("/v0.7/traces", ddr.handleTraces)
ddmux.HandleFunc("/api/v0.2/traces", ddr.handleTraces)
var err error
ddr.server, err = ddr.config.ServerConfig.ToServer(
ctx,
host,
ddr.params.TelemetrySettings,
ddmux,
)
if err != nil {
return fmt.Errorf("failed to create server definition: %w", err)
}
hln, err := ddr.config.ServerConfig.ToListener(ctx)
if err != nil {
return fmt.Errorf("failed to create datadog listener: %w", err)
}
ddr.address = hln.Addr().String()
go func() {
if err := ddr.server.Serve(hln); err != nil && !errors.Is(err, http.ErrServerClosed) {
ddr.params.TelemetrySettings.ReportStatus(component.NewFatalErrorEvent(fmt.Errorf("error starting datadog receiver: %w", err)))
}
}()
return nil
}
func (ddr *datadogReceiver) Shutdown(ctx context.Context) (err error) {
return ddr.server.Shutdown(ctx)
}
func (ddr *datadogReceiver) handleTraces(w http.ResponseWriter, req *http.Request) {
obsCtx := ddr.tReceiver.StartTracesOp(req.Context())
var err error
var spanCount int
defer func(spanCount *int) {
ddr.tReceiver.EndTracesOp(obsCtx, "datadog", *spanCount, err)
}(&spanCount)
var ddTraces []*pb.TracerPayload
ddTraces, err = handlePayload(req)
if err != nil {
http.Error(w, "Unable to unmarshal reqs", http.StatusBadRequest)
ddr.params.Logger.Error("Unable to unmarshal reqs")
return
}
for _, ddTrace := range ddTraces {
otelTraces := toTraces(ddTrace, req)
spanCount = otelTraces.SpanCount()
err = ddr.nextConsumer.ConsumeTraces(obsCtx, otelTraces)
if err != nil {
http.Error(w, "Trace consumer errored out", http.StatusInternalServerError)
ddr.params.Logger.Error("Trace consumer errored out")
return
}
}
_, _ = w.Write([]byte("OK"))
}