Threadline.Telemetry (Threadline v0.4.0)

Telemetry integration helpers for Threadline.

Threadline emits three telemetry events:

[:threadline, :transaction, :committed] — after an AuditTransaction is committed. Automatically emitted (with table_count: 0) when Threadline.record_action/2 succeeds. For accurate per-transaction counts, call Threadline.Telemetry.transaction_committed/2 explicitly after a known DB transaction commit.
[:threadline, :action, :recorded] — after Threadline.record_action/2 completes (success or failure).
[:threadline, :health, :checked] — after Threadline.Health.trigger_coverage/1 returns.

Usage

Attach handlers in your application's start/2 callback:

:telemetry.attach(
  "my-app-audit",
  [:threadline, :action, :recorded],
  &MyApp.Instrumentation.handle_event/4,
  nil
)

Emits [:threadline, :transaction, :committed] with the given table count.

Emits [:threadline, :transaction, :committed] with the given table count.

Call this after a DB transaction that you know produced AuditTransaction records, when you need accurate table_count measurements.

{:ok, txn} = MyApp.Repo.transaction(fn ->
  # ... your writes ...
end)
Threadline.Telemetry.transaction_committed(txn, table_count: 3)