/
exporter.go
90 lines (73 loc) · 2.66 KB
/
exporter.go
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// Copyright 2019, 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 jaegergrpcexporter
import (
"context"
jaegerproto "github.com/jaegertracing/jaeger/proto-gen/api_v2"
"google.golang.org/grpc"
"google.golang.org/grpc/metadata"
"github.com/open-telemetry/opentelemetry-collector/component"
"github.com/open-telemetry/opentelemetry-collector/config/configgrpc"
"github.com/open-telemetry/opentelemetry-collector/consumer/consumerdata"
"github.com/open-telemetry/opentelemetry-collector/consumer/consumererror"
"github.com/open-telemetry/opentelemetry-collector/exporter/exporterhelper"
jaegertranslator "github.com/open-telemetry/opentelemetry-collector/translator/trace/jaeger"
)
// New returns a new Jaeger gRPC exporter.
// The exporter name is the name to be used in the observability of the exporter.
// The collectorEndpoint should be of the form "hostname:14250" (a gRPC target).
func New(config *Config) (component.TraceExporterOld, error) {
opts, err := configgrpc.GrpcSettingsToDialOptions(config.GRPCSettings)
if err != nil {
return nil, err
}
client, err := grpc.Dial(config.GRPCSettings.Endpoint, opts...)
if err != nil {
return nil, err
}
collectorServiceClient := jaegerproto.NewCollectorServiceClient(client)
s := &protoGRPCSender{
client: collectorServiceClient,
metadata: metadata.New(config.GRPCSettings.Headers),
}
exp, err := exporterhelper.NewTraceExporterOld(
config,
s.pushTraceData)
return exp, err
}
// protoGRPCSender forwards spans encoded in the jaeger proto
// format, to a grpc server.
type protoGRPCSender struct {
client jaegerproto.CollectorServiceClient
metadata metadata.MD
}
func (s *protoGRPCSender) pushTraceData(
ctx context.Context,
td consumerdata.TraceData,
) (droppedSpans int, err error) {
protoBatch, err := jaegertranslator.OCProtoToJaegerProto(td)
if err != nil {
return len(td.Spans), consumererror.Permanent(err)
}
if s.metadata.Len() > 0 {
ctx = metadata.NewOutgoingContext(ctx, s.metadata)
}
_, err = s.client.PostSpans(
ctx,
&jaegerproto.PostSpansRequest{Batch: *protoBatch})
if err != nil {
droppedSpans = len(protoBatch.Spans)
}
return droppedSpans, err
}