Persistence Exporter in Javascript library

[akbarnafisaj]

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• [x] This only affects the JavaScript OpenTelemetry library
• [ ] This may affect other libraries, but I would like to get opinions here first

Does Opentelemetry JS have similar feature to Persistence Exporter ?

[vmarchaud]

Not currently, but this shouldn't be too hard to implement by extending the batch exporter there: https://github.com/open-telemetry/opentelemetry-js/blob/main/packages/opentelemetry-sdk-trace-base/src/export/BatchSpanProcessorBase.ts

[legendecas]

I think we need to define it in the spec first for us to release it as a built-in one.

[github-actions[bot]]

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[dyladan]

What is the usecase for this in JS. In swift and android it is obviously useful for mobile apps which may have limited network access and be terminated before exports are complete. In most restricted JS environments such as browser, lambda, webworkers, and edge compute, persisting to disk is not guaranteed to be easy or possible.

[ianhattendorf]

What is the usecase for this in JS

This would be very useful for us as an Electron app. E.g. user is on a laptop without connectivity. Or the app crashes before the batch sends.

In most restricted JS environments such as browser, lambda, webworkers, and edge compute, persisting to disk is not guaranteed to be easy or possible

Allowing users to control storage (possibly via a callback?) could allow them to choose between filesystem/localstorage/etc.

[scheler]

Could this help with https://github.com/open-telemetry/opentelemetry-js/issues/2205 too for the browser?