93c7fd63fc
Adds enqueue / lease / ack_done / ack_failed / release / reap_done on crawler::jobs, backed by the existing crawler_jobs table. lease() uses a single FOR UPDATE SKIP LOCKED CTE that also re-claims stale running rows (crashed-worker recovery), and ack_failed applies an exponential backoff capped at 1h before retrying. Migration 0014 adds a partial unique index on (payload->>'chapter_id') restricted to (pending|running) sync_chapter_content jobs, so producers can just INSERT ... ON CONFLICT DO NOTHING without racing each other. The slot frees again the moment the job leaves the in-flight states, so a future force-refetch can re-enqueue. Library-only — no daemon, no API hook. Those land in the next two phases. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
16 lines
854 B
SQL
16 lines
854 B
SQL
-- Dedup SyncChapterContent jobs in flight.
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--
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-- Without this, the daemon's bookmark/cron enqueue paths would have to do a
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-- pre-check + insert race that's incorrect under concurrency. The partial
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-- unique index lets both producers use plain `INSERT ... ON CONFLICT DO
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-- NOTHING`: at most one (pending|running) job per chapter_id exists, and the
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-- slot frees again as soon as the job transitions to done/failed/dead so a
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-- re-enqueue is possible after the row is reaped or a force-refetch is wanted.
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--
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-- Scoped to sync_chapter_content payloads only so Discover / SyncManga /
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-- SyncChapterList jobs (which don't carry a chapter_id) remain un-deduped.
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CREATE UNIQUE INDEX crawler_jobs_chapter_content_dedup_idx
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ON crawler_jobs ((payload->>'chapter_id'))
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WHERE state IN ('pending', 'running')
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AND payload->>'kind' = 'sync_chapter_content';
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