Observability: OpenTelemetry integration as middleware #20

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opened 2026-02-19 21:28:52 +00:00 by ash · 0 comments

ash commented

2026-02-19 21:28:52 +00:00

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What

Optional OTel middleware for tracing and metrics. NOT baked in — composable.

Traces

Command dispatch span
Event append span
Projection processing span
Subscription catch-up span

Metrics

Commands/sec, events/sec
Projection lag
DLQ size
Subscription position
Error rates

Key: this is middleware, not core. Zero overhead if not used.

## What Optional OTel middleware for tracing and metrics. NOT baked in — composable. ## Traces - Command dispatch span - Event append span - Projection processing span - Subscription catch-up span ## Metrics - Commands/sec, events/sec - Projection lag - DLQ size - Subscription position - Error rates ## Key: this is middleware, not core. Zero overhead if not used.