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otlp.go
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otlp.go
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// Copyright The OpenTelemetry Authors
// SPDX-License-Identifier: Apache-2.0
package logs // import "go.opentelemetry.io/collector/receiver/otlpreceiver/internal/logs"
import (
"context"
"go.opentelemetry.io/collector/consumer"
"go.opentelemetry.io/collector/pdata/plog/plogotlp"
"go.opentelemetry.io/collector/receiver/otlpreceiver/internal/errors"
"go.opentelemetry.io/collector/receiver/receiverhelper"
)
const dataFormatProtobuf = "protobuf"
// Receiver is the type used to handle logs from OpenTelemetry exporters.
type Receiver struct {
plogotlp.UnimplementedGRPCServer
nextConsumer consumer.Logs
obsreport *receiverhelper.ObsReport
}
// New creates a new Receiver reference.
func New(nextConsumer consumer.Logs, obsreport *receiverhelper.ObsReport) *Receiver {
return &Receiver{
nextConsumer: nextConsumer,
obsreport: obsreport,
}
}
// Export implements the service Export logs func.
func (r *Receiver) Export(ctx context.Context, req plogotlp.ExportRequest) (plogotlp.ExportResponse, error) {
ld := req.Logs()
numSpans := ld.LogRecordCount()
if numSpans == 0 {
return plogotlp.NewExportResponse(), nil
}
ctx = r.obsreport.StartLogsOp(ctx)
err := r.nextConsumer.ConsumeLogs(ctx, ld)
r.obsreport.EndLogsOp(ctx, dataFormatProtobuf, numSpans, err)
// Use appropriate status codes for permanent/non-permanent errors
// If we return the error straightaway, then the grpc implementation will set status code to Unknown
// Refer: https://github.com/grpc/grpc-go/blob/v1.59.0/server.go#L1345
// So, convert the error to appropriate grpc status and return the error
// NonPermanent errors will be converted to codes.Unavailable (equivalent to HTTP 503)
// Permanent errors will be converted to codes.InvalidArgument (equivalent to HTTP 400)
if err != nil {
return plogotlp.NewExportResponse(), errors.GetStatusFromError(err)
}
return plogotlp.NewExportResponse(), nil
}