114 lines
2.6 KiB
Go
114 lines
2.6 KiB
Go
// Copyright The 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 otlptrace // import "go.opentelemetry.io/otel/exporters/otlp/otlptrace"
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import (
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"context"
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"errors"
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"sync"
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"go.opentelemetry.io/otel/exporters/otlp/otlptrace/internal/tracetransform"
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tracesdk "go.opentelemetry.io/otel/sdk/trace"
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)
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var (
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errAlreadyStarted = errors.New("already started")
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)
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// Exporter exports trace data in the OTLP wire format.
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type Exporter struct {
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client Client
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mu sync.RWMutex
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started bool
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startOnce sync.Once
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stopOnce sync.Once
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}
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// ExportSpans exports a batch of spans.
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func (e *Exporter) ExportSpans(ctx context.Context, ss []tracesdk.ReadOnlySpan) error {
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protoSpans := tracetransform.Spans(ss)
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if len(protoSpans) == 0 {
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return nil
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}
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return e.client.UploadTraces(ctx, protoSpans)
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}
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// Start establishes a connection to the receiving endpoint.
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func (e *Exporter) Start(ctx context.Context) error {
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var err = errAlreadyStarted
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e.startOnce.Do(func() {
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e.mu.Lock()
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e.started = true
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e.mu.Unlock()
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err = e.client.Start(ctx)
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})
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return err
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}
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// Shutdown flushes all exports and closes all connections to the receiving endpoint.
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func (e *Exporter) Shutdown(ctx context.Context) error {
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e.mu.RLock()
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started := e.started
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e.mu.RUnlock()
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if !started {
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return nil
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}
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var err error
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e.stopOnce.Do(func() {
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err = e.client.Stop(ctx)
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e.mu.Lock()
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e.started = false
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e.mu.Unlock()
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})
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return err
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}
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var _ tracesdk.SpanExporter = (*Exporter)(nil)
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// New constructs a new Exporter and starts it.
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func New(ctx context.Context, client Client) (*Exporter, error) {
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exp := NewUnstarted(client)
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if err := exp.Start(ctx); err != nil {
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return nil, err
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}
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return exp, nil
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}
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// NewUnstarted constructs a new Exporter and does not start it.
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func NewUnstarted(client Client) *Exporter {
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return &Exporter{
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client: client,
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}
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}
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// MarshalLog is the marshaling function used by the logging system to represent this exporter.
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func (e *Exporter) MarshalLog() interface{} {
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return struct {
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Type string
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Client Client
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}{
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Type: "otlptrace",
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Client: e.client,
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}
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}
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