68 lines
1.6 KiB
Markdown
68 lines
1.6 KiB
Markdown
# Open Telemetry Example
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Writes Telemetry Tracing information to the endpoint provided using the [OLTP JSON over HTTP specification](https://github.com/open-telemetry/opentelemetry-proto/blob/main/docs/specification.md#json-protobuf-encoding)
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## Example Usage
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Use the _code block_ widget to start and end spans.
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Spans can be nested to form a stack, with the parent span being the most recent
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active span added to the stack. You can have multiple spans using the same name,
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and ending a span by name will always end the most recent span.
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Spans will only be written to the opentelemetry endpoint once the _endSpan_
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method is called.
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## Visualization
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For example, using Jaeger UI:
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## Code Snippets
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### Start Span
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```javascript
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(async () => {
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opentelemetry.startSpan("Global Flow");
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})()
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.catch((error) => {
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console.error(error.message);
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recognizedObject.answers.push("");
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recognizedObject.errorInfo = {
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...recognizedObject.errorInfo,
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label: {
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data: error.toJSON ? error.toJSON() : {},
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message: error.message,
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},
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};
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})
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.finally(() => {
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next();
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});
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```
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### End Span
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```javascript
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(async () => {
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opentelemetry.endSpan("Global Flow");
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})()
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.catch((error) => {
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console.error(error.message);
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recognizedObject.answers.push("");
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recognizedObject.errorInfo = {
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...recognizedObject.errorInfo,
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label: {
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data: error.toJSON ? error.toJSON() : {},
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message: error.message,
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},
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};
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})
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.finally(() => {
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next();
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});
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```
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