mirror of
https://github.com/open-telemetry/opentelemetry-go.git
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acb350b8f3
* Support JSON marshal of Resources * Add a test * Another test * Fix arch bug * Fix other test
69 lines
1.9 KiB
Go
69 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
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import (
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"context"
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"encoding/json"
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"io"
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"os"
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export "go.opentelemetry.io/otel/sdk/export/trace"
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)
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// Options are the options to be used when initializing a stdout export.
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type Options struct {
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// Writer is the destination. If not set, os.Stdout is used.
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Writer io.Writer
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// PrettyPrint will pretty the json representation of the span,
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// making it print "pretty". Default is false.
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PrettyPrint bool
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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 Exporter struct {
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pretty bool
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outputWriter io.Writer
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}
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func NewExporter(o Options) (*Exporter, error) {
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if o.Writer == nil {
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o.Writer = os.Stdout
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}
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return &Exporter{
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pretty: o.PrettyPrint,
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outputWriter: o.Writer,
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}, nil
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}
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// ExportSpan writes a SpanData in json format to stdout.
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func (e *Exporter) ExportSpan(ctx context.Context, data *export.SpanData) {
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var jsonSpan []byte
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var err error
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if e.pretty {
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jsonSpan, err = json.MarshalIndent(data, "", "\t")
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} else {
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jsonSpan, err = json.Marshal(data)
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}
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if err != nil {
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// ignore writer failures for now
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_, _ = e.outputWriter.Write([]byte("Error converting spanData to json: " + err.Error()))
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return
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}
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// ignore writer failures for now
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_, _ = e.outputWriter.Write(append(jsonSpan, byte('\n')))
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}
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