mirror of
https://github.com/open-telemetry/opentelemetry-go.git
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cbcd4b1a3d
* Remove TODO from ReadOnlySpan interface * Remove the Tracer method from the ReadOnlySpan This is not required by the specification nor the use of this interface. * Remove IsRecording from the ReadOnlySpan interface A read-only span value does not need to know if updates to it will be recorded. It by definition cannot be updated so no point in communicating if an update would be recorded. * Document the ReadOnlySpan interface * Rename messageEvent* to just event* * Move the SpanSnapshot into its own file * Update ReadOnlySpan interface with meta info methods Add the DroppedAttributes, DroppedLinks, DroppedEvents, and ChildSpanCount methods to the interface to return additional information about the span not specified by the specification, but that we are already providing. * Add SpanStub to the sdk/trace/tracetest pkg * Redefine ExportSpans of SpanExporter with ReadOnlySpan * Rename SpanSnapshot to snapshot and purge docs * Remove Snapshot method from snapshot type This method is a hold-over from previous version of the ReadOnlySpan interface is not needed. * Update CHANGELOG with changes
76 lines
1.9 KiB
Go
76 lines
1.9 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 stdout // import "go.opentelemetry.io/otel/exporters/stdout"
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import (
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"context"
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"encoding/json"
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"fmt"
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"sync"
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"go.opentelemetry.io/otel/sdk/trace"
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"go.opentelemetry.io/otel/sdk/trace/tracetest"
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)
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// Exporter is an implementation of trace.SpanSyncer that writes spans to stdout.
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type traceExporter struct {
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config Config
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stoppedMu sync.RWMutex
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stopped bool
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}
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// ExportSpans writes spans in json format to stdout.
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func (e *traceExporter) ExportSpans(ctx context.Context, spans []trace.ReadOnlySpan) error {
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e.stoppedMu.RLock()
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stopped := e.stopped
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e.stoppedMu.RUnlock()
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if stopped {
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return nil
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}
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if e.config.DisableTraceExport || len(spans) == 0 {
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return nil
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}
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out, err := e.marshal(tracetest.SpanStubsFromReadOnlySpans(spans))
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if err != nil {
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return err
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}
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_, err = fmt.Fprintln(e.config.Writer, string(out))
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return err
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}
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// Shutdown is called to stop the exporter, it preforms no action.
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func (e *traceExporter) Shutdown(ctx context.Context) error {
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e.stoppedMu.Lock()
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e.stopped = true
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e.stoppedMu.Unlock()
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select {
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case <-ctx.Done():
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return ctx.Err()
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default:
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}
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return nil
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}
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// marshal v with approriate indentation.
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func (e *traceExporter) marshal(v interface{}) ([]byte, error) {
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if e.config.PrettyPrint {
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return json.MarshalIndent(v, "", "\t")
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}
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return json.Marshal(v)
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}
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