otlp MetricExporter in a custom event loop

[CrimsonAndRed]

Hello, folks! I am trying to use an OTEL exporter in a form:

let exporter = opentelemetry_otlp::MetricExporter::builder() ... .build().unwrap();
let provider = opentelemetry_sdk::metrics::SdkMeterProvider::builder().with_periodic_exporter(exporter).build();

which does a background work of metrics exporting and is working fine. Though I would like to move periodic jobs on my own event loop. Is it possible via current API? Looks like there are just 2 options available for MeterProviders - either use with_periodic_exporter(..) or with_reader(..). I assumed the latter one is an option for me, but can not "connect" reader to exporter.

Of course I can set gigantic duration for exporter, use with_periodic_exporter(..) and do provider.force_flush(), though I expect... more elegant solution.
Thanks!

[cijothomas]

Probably looking for ManualReader then.. it does not flush metrics on its own (it has no background job). Only time metrics is pushed are when you explicitly trigger via Flush().

Another option (it is experimental today) is to use periodic_reader that uses async tasks, so it'll integrate with tokio like runtimes instead of spawning own thread.