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Move preview rendering out of the BDS.Preview GenServer

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Chili Palmer
2026-06-12 12:39:16 +02:00
parent f088cfb77b
commit cd72998a13
3 changed files with 252 additions and 63 deletions
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TECHDEBTS.md
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@@ -451,7 +451,18 @@ error like the existing `%{kind: :auth, ...}` shape so the UI can toast it.
## Phase 3 — Process architecture (de-bottleneck singletons)
### TD-11: Move preview rendering out of the `BDS.Preview` GenServer
### TD-11: Move preview rendering out of the `BDS.Preview` GenServer ✅ DONE (2026-06-12)
**Status: implemented.** `BDS.Preview` now keeps only preview-server lifecycle and
drain coordination in the GenServer. The current server state lives in a public
ETS table, so both direct preview calls and socket-served HTTP requests resolve
against that fast state read and render outside the singleton owner process.
Direct `request/2` and `preview_draft/3` calls now run in short-lived tracked
tasks, while TCP request workers render inline after inheriting the test sandbox
allowance; graceful stop flips `is_running` false in ETS before draining and
waits for those tracked render workers to finish. Coverage now proves two real
HTTP preview renders can be in flight at once and that `stop_preview/1` waits
for a blocked render to complete before returning.
**Context.** Every preview HTTP request (`Preview.request/2`,
`preview_draft/3`) renders Markdown + Liquid **inside** the singleton