cim_summary/.planning/phases/03-api-layer/03-02-SUMMARY.md

phase, plan, subsystem, tags, requires, provides, affects, tech-stack, key-files, key-decisions, patterns-established, requirements-completed, duration, completed

phase	plan	subsystem	tags	requires	provides	affects	tech-stack	key-files	key-decisions	patterns-established	requirements-completed	duration	completed
03-api-layer	02	api	analytics instrumentation fire-and-forget document-processing	phase provides 02-backend-services analyticsService.recordProcessingEvent() fire-and-forget function phase provides 03-api-layer/03-01 analytics endpoint that reads document_processing_events table	Analytics instrumentation at 3 lifecycle points in processJob() document_processing_events table populated with real processing data	03-api-layer 03-01-analytics-endpoint	added patterns Fire-and-forget analytics calls (void return, no await) in processJob lifecycle	created modified backend/src/services/jobProcessorService.ts	All three recordProcessingEvent() calls are void/fire-and-forget (no await) — PITFALL-6 compliance confirmed upload_started event emitted after markAsProcessing (not processing_started) per locked decision Null-guard on job in catch block — job can be null if findById throws before assignment	Analytics instrumentation pattern: call recordProcessingEvent() without await, no try/catch wrapper — function handles errors internally	ANLY-02	2min	2026-02-24

Phase 3 Plan 02: Analytics Instrumentation Summary

Three fire-and-forget recordProcessingEvent() calls added to processJob() at upload_started, completed, and failed lifecycle points

Performance

• Duration: 2 min
• Started: 2026-02-24T20:42:54Z
• Completed: 2026-02-24T20:44:36Z
• Tasks: 1
• Files modified: 1

Accomplishments

• Added import for recordProcessingEvent from analyticsService at top of jobProcessorService.ts
• Emits upload_started event (fire-and-forget) after markAsProcessing at job start
• Emits completed event with duration_ms (fire-and-forget) after markAsCompleted on success
• Emits failed event with duration_ms and error_message (fire-and-forget) in catch block with null-guard
• Zero regressions — all 64 existing tests pass, TypeScript compiles cleanly

Task Commits

Each task was committed atomically:

1. Task 1: Add analytics instrumentation to processJob lifecycle - dabd4a5 (feat)

Plan metadata: (docs commit follows)

Files Created/Modified

• backend/src/services/jobProcessorService.ts - Added import and 3 recordProcessingEvent() instrumentation calls at job start, completion, and failure

Decisions Made

• Confirmed event_type: 'upload_started' (not 'processing_started') matches the locked analytics schema decision
• No await on any recordProcessingEvent() call — void return type enforces fire-and-forget at the type system level
• Null-guard if (job) in catch block is necessary because job remains null if ProcessingJobModel.findById() throws before assignment

Deviations from Plan

None - plan executed exactly as written.

Issues Encountered

None.

User Setup Required

None - no external service configuration required.

Next Phase Readiness

• Analytics pipeline is now end-to-end: document_processing_events table receives real data when jobs run
• GET /admin/analytics endpoint (03-01) will report actual processing metrics instead of zeros
• No blockers for remaining Phase 03 plans

Self-Check: PASSED

• FOUND: backend/src/services/jobProcessorService.ts
• FOUND: .planning/phases/03-api-layer/03-02-SUMMARY.md
• FOUND commit: dabd4a5 (feat: analytics instrumentation)
• FOUND commit: 081c535 (docs: plan metadata)

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Phase: 03-api-layer Completed: 2026-02-24