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Make vote-shop debits atomic before granting rewards - #1600

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BenCodez wants to merge 47 commits into
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security/atomic-vote-shop
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Make vote-shop debits atomic before granting rewards#1600
BenCodez wants to merge 47 commits into
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security/atomic-vote-shop

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@BenCodez

@BenCodez BenCodez commented Sep 7, 2026

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Summary

  • serialize shared-MySQL purchases and recheck balances/limits inside their durable transaction
  • preserve compensation and invalidate point/limit snapshots when refund commit status is indeterminate
  • make the Points reward await the committed shared-MySQL total before publishing newpoints or continuing dependent rewards
  • preserve existing synchronous APIs and ordinary-storage behavior

Dependency and ordering

This branch uses the additive async reward-injection API from BenCodez/AdvancedCore#317. Merge and publish #317 first, then rebuild this PR against that exact 3.8.2-SNAPSHOT artifact before merging #1600. Until then, clean standalone CI cannot resolve the new API from the currently published snapshot.

Validation

  • focused: mvn -o test-compile org.apache.maven.plugins:maven-surefire-plugin:3.5.4:test -Dtest=RewardPointsTest,VotingPluginUserPointSchedulingTest,VoteShopPurchaseServiceTest — 81 passed
  • full: mvn -o clean package — 756 passed
  • git diff --check
  • VotingPlugin.jar SHA-256: f5fec30835bbb0813862379302f10b5a26574ad94764c81865bd9cd0c9b06071
  • verified the shaded JAR contains Last month total #317 async Reward/RewardInject APIs

AI assistance: Codex assisted with implementation, tests, and review.

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Review Status Commit Review trigger
📝 Code Review Completed 2026-09-11T11:49:02.743378Z 68976d5 New commits
🔒 Security Review Completed 2026-09-07T21:31:06.987114Z 4b12ebf PR opened
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BenCodez commented Sep 7, 2026

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Addressed all review findings: locking is keyed by stable player identity, the striped lock table survives service reloads, persistence remains asynchronous, and the race test uses separate wrappers with a deliberately non-atomic debit. Full mvn clean package passes. @codex review

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Comment thread VotingPlugin/src/main/java/com/bencodez/votingplugin/commands/CommandLoader.java Outdated
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+ failure.getClass().getSimpleName());
plugin.debug(failure);
} finally {
SharedMysqlCacheReconciler.invalidateAllAndRefresh(plugin, limitColumn);

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P2 Badge Fence in-flight cache dumps during shared limit resets

When a cache is created after the initial invalidation and drainPurchaseCache() starts dumping its pre-reset limit while the reset transaction holds the row lock, the final invalidation cannot prevent the stale write: it blocks on the cache monitor until dump() resumes after the reset commits, writes the old absolute limit, and removes the cache. Fresh evidence beyond the prior snapshot fix is that snapshotting the registry still cannot retract a dump that has already left the cache queue, so a user can remain at the old purchase limit after a reset; serialize cache dumps with the reset or make those writes epoch-aware.

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