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traces.go
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traces.go
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// Copyright The OpenTelemetry Authors
// SPDX-License-Identifier: Apache-2.0
package exporterhelper // import "go.opentelemetry.io/collector/exporter/exporterhelper"
import (
"context"
"errors"
"go.uber.org/zap"
"go.opentelemetry.io/collector/component"
"go.opentelemetry.io/collector/consumer"
"go.opentelemetry.io/collector/consumer/consumererror"
"go.opentelemetry.io/collector/exporter"
"go.opentelemetry.io/collector/exporter/exporterqueue"
"go.opentelemetry.io/collector/exporter/internal/queue"
"go.opentelemetry.io/collector/pdata/ptrace"
)
var tracesMarshaler = &ptrace.ProtoMarshaler{}
var tracesUnmarshaler = &ptrace.ProtoUnmarshaler{}
type tracesRequest struct {
td ptrace.Traces
pusher consumer.ConsumeTracesFunc
}
func newTracesRequest(td ptrace.Traces, pusher consumer.ConsumeTracesFunc) Request {
return &tracesRequest{
td: td,
pusher: pusher,
}
}
func newTraceRequestUnmarshalerFunc(pusher consumer.ConsumeTracesFunc) exporterqueue.Unmarshaler[Request] {
return func(bytes []byte) (Request, error) {
traces, err := tracesUnmarshaler.UnmarshalTraces(bytes)
if err != nil {
return nil, err
}
return newTracesRequest(traces, pusher), nil
}
}
func tracesRequestMarshaler(req Request) ([]byte, error) {
return tracesMarshaler.MarshalTraces(req.(*tracesRequest).td)
}
func (req *tracesRequest) OnError(err error) Request {
var traceError consumererror.Traces
if errors.As(err, &traceError) {
return newTracesRequest(traceError.Data(), req.pusher)
}
return req
}
func (req *tracesRequest) Export(ctx context.Context) error {
return req.pusher(ctx, req.td)
}
func (req *tracesRequest) ItemsCount() int {
return req.td.SpanCount()
}
type traceExporter struct {
*baseExporter
consumer.Traces
}
// NewTracesExporter creates an exporter.Traces that records observability metrics and wraps every request with a Span.
func NewTracesExporter(
ctx context.Context,
set exporter.CreateSettings,
cfg component.Config,
pusher consumer.ConsumeTracesFunc,
options ...Option,
) (exporter.Traces, error) {
if cfg == nil {
return nil, errNilConfig
}
if pusher == nil {
return nil, errNilPushTraceData
}
tracesOpts := []Option{
withMarshaler(tracesRequestMarshaler), withUnmarshaler(newTraceRequestUnmarshalerFunc(pusher)),
withBatchFuncs(mergeTraces, mergeSplitTraces),
}
return NewTracesRequestExporter(ctx, set, requestFromTraces(pusher), append(tracesOpts, options...)...)
}
// RequestFromTracesFunc converts ptrace.Traces into a user-defined Request.
// Experimental: This API is at the early stage of development and may change without backward compatibility
// until https://github.com/open-telemetry/opentelemetry-collector/issues/8122 is resolved.
type RequestFromTracesFunc func(context.Context, ptrace.Traces) (Request, error)
// requestFromTraces returns a RequestFromTracesFunc that converts ptrace.Traces into a Request.
func requestFromTraces(pusher consumer.ConsumeTracesFunc) RequestFromTracesFunc {
return func(_ context.Context, traces ptrace.Traces) (Request, error) {
return newTracesRequest(traces, pusher), nil
}
}
// NewTracesRequestExporter creates a new traces exporter based on a custom TracesConverter and RequestSender.
// Experimental: This API is at the early stage of development and may change without backward compatibility
// until https://github.com/open-telemetry/opentelemetry-collector/issues/8122 is resolved.
func NewTracesRequestExporter(
_ context.Context,
set exporter.CreateSettings,
converter RequestFromTracesFunc,
options ...Option,
) (exporter.Traces, error) {
if set.Logger == nil {
return nil, errNilLogger
}
if converter == nil {
return nil, errNilTracesConverter
}
be, err := newBaseExporter(set, component.DataTypeTraces, newTracesExporterWithObservability, options...)
if err != nil {
return nil, err
}
tc, err := consumer.NewTraces(func(ctx context.Context, td ptrace.Traces) error {
req, cErr := converter(ctx, td)
if cErr != nil {
set.Logger.Error("Failed to convert traces. Dropping data.",
zap.Int("dropped_spans", td.SpanCount()),
zap.Error(err))
return consumererror.NewPermanent(cErr)
}
sErr := be.send(ctx, req)
if errors.Is(sErr, queue.ErrQueueIsFull) {
be.obsrep.recordEnqueueFailure(ctx, component.DataTypeTraces, int64(req.ItemsCount()))
}
return sErr
}, be.consumerOptions...)
return &traceExporter{
baseExporter: be,
Traces: tc,
}, err
}
type tracesExporterWithObservability struct {
baseRequestSender
obsrep *ObsReport
}
func newTracesExporterWithObservability(obsrep *ObsReport) requestSender {
return &tracesExporterWithObservability{obsrep: obsrep}
}
func (tewo *tracesExporterWithObservability) send(ctx context.Context, req Request) error {
c := tewo.obsrep.StartTracesOp(ctx)
// Forward the data to the next consumer (this pusher is the next).
err := tewo.nextSender.send(c, req)
tewo.obsrep.EndTracesOp(c, req.ItemsCount(), err)
return err
}