mirror of
https://github.com/open-telemetry/opentelemetry-go.git
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1ab645fedb
Change all occurrences of value to pointer receivers Add meta sys files to .gitignore Code cleanup e.g. - Don't capitalize error statements - Fix ignored errors - Fix ambiguous variable naming - Remove unnecessary type casting - Use named params Fix #306
95 lines
2.9 KiB
Go
95 lines
2.9 KiB
Go
// Copyright 2019, OpenTelemetry Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package stackdriver
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import (
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"context"
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"fmt"
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traceclient "cloud.google.com/go/trace/apiv2"
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tracepb "google.golang.org/genproto/googleapis/devtools/cloudtrace/v2"
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export "go.opentelemetry.io/otel/sdk/export/trace"
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)
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// traceExporter is an imeplementation of trace.Exporter and trace.BatchExporter
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// that uploads spans to Stackdriver Trace in batch.
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type traceExporter struct {
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o *options
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projectID string
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// uploadFn defaults in uploadSpans; it can be replaced for tests.
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uploadFn func(ctx context.Context, spans []*tracepb.Span)
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client *traceclient.Client
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}
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func newTraceExporter(o *options) (*traceExporter, error) {
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client, err := traceclient.NewClient(o.Context, o.TraceClientOptions...)
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if err != nil {
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return nil, fmt.Errorf("stackdriver: couldn't initiate trace client: %v", err)
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}
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e := &traceExporter{
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projectID: o.ProjectID,
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client: client,
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o: o,
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}
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e.uploadFn = e.uploadSpans
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return e, nil
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}
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// ExportSpan exports a SpanData to Stackdriver Trace.
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func (e *traceExporter) ExportSpan(ctx context.Context, sd *export.SpanData) {
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protoSpan := protoFromSpanData(sd, e.projectID)
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e.uploadFn(ctx, []*tracepb.Span{protoSpan})
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}
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// ExportSpans exports a slice of SpanData to Stackdriver Trace in batch
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func (e *traceExporter) ExportSpans(ctx context.Context, sds []*export.SpanData) {
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pbSpans := make([]*tracepb.Span, len(sds))
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for i, sd := range sds {
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pbSpans[i] = protoFromSpanData(sd, e.projectID)
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}
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e.uploadFn(ctx, pbSpans)
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}
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// uploadSpans sends a set of spans to Stackdriver.
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func (e *traceExporter) uploadSpans(ctx context.Context, spans []*tracepb.Span) {
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req := tracepb.BatchWriteSpansRequest{
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Name: "projects/" + e.projectID,
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Spans: spans,
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}
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var cancel func()
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ctx, cancel = newContextWithTimeout(ctx, e.o.Timeout)
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defer cancel()
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// TODO(ymotongpoo): add this part after OTel support NeverSampler
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// for tracer.Start() initialization.
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//
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// tracer := apitrace.Register()
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// ctx, span := tracer.Start(
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// ctx,
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// "go.opentelemetry.io/otel/exporter/stackdriver.uploadSpans",
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// )
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// defer span.End()
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// span.SetAttributes(key.New("num_spans").Int64(int64(len(spans))))
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err := e.client.BatchWriteSpans(ctx, &req)
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if err != nil {
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// TODO(ymotongpoo): handle detailed error categories
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// span.SetStatus(codes.Unknown)
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e.o.handleError(err)
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}
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}
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