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* add copyright header * clippy --all-targets
maddeleine
approved these changes
Feb 12, 2026
kaukabrizvi
approved these changes
Feb 13, 2026
bindings/rust/standard/s2n-metrics-subscriber/src/emf_emitter.rs
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Goal
Allow metric records to be converted to EMF.
Why
The metric record is not useful unless we can actually do something with the data. We expect that most customers will be used CloudWatch for analysis/visualization, and EMF is the preferred way to get the metric records ingested in CloudWatch.
How
We use the Metrique Writer interface to handle the actual EMF formatting.
Callouts
The EmfEmitter is intended for future usage through FFI. Accordingly, it has internal buffering to allow a customers to separate that actual record flushing/IO from the aggregation.
Testing
Unit Tests.
I also wrote a simple cloudwatch emitter (not included in this PR) to dump things to CloudWatch and confirm that it made nice lines.
By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.