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Oracle Integration Cloud: Building Integrations That Survive Production · Module 9 · Idempotency and duplicate prevention

Idempotency across a whole file

Lesson 99 of 175 · 2 min

File-level and record-level are DIFFERENT GUARANTEES, and knowing which you have is what decides whether a mid-file restart is safe. FILE-LEVEL idempotency says "this file will not be processed twice". The move-first pattern from the scheduling module gives you it: the file leaves inbound when claimed, so a second run cannot pick it up. RECORD-LEVEL says "this record will not be created twice". A correlation key and a constraint, per Lessons 3 and 4. FILE-LEVEL ALONE FAILS ON A MID-FILE RESTART, and that is the gap. A run that dies at record 200 of 400 has committed 199. The file is in the processing directory, which correctly says "started, unfinished" — and a rerun of that file reprocesses all 400. Without record-level protection, 199 duplicates. RECORD-LEVEL ALONE IS WASTEFUL BUT SAFE: the file is processed twice, 199 records are recognised and skipped, 201 are created. Correct outcome, twice the work,…

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In this module: Module 9 · Idempotency and duplicate prevention

  1. 1Why every integration is retriedFree preview
  2. 2What idempotency means here
  3. 3Choosing a correlation key
  4. 4Where to enforce it
  5. 5When the target has no natural key
  6. 6Timeouts: the ambiguous outcome
  7. 7Idempotency across a whole file
  8. 8What breaks: three duplicate scenarios
  9. 9Lab briefing · Make a payment flow safe to retry