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…d integrate it in RefundTxEventListener
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Summary of Changes
Hello @polyglot-k, I'm Gemini Code Assist1! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!
This pull request aims to enhance the refund process by ensuring that payment entities associated with a refunded exam application are automatically removed from the database. This cleanup occurs after a successful refund transaction commit, preventing orphaned payment records and maintaining data integrity.
Highlights
- Refund Process Enhancement: I've updated the RefundTxEventListener to include a post-commit action that deletes payment entities.
- Payment Entity Deletion: I've introduced a new method deleteByExamApplicationId in PaymentJpaRepository to facilitate the removal of payment records linked to a specific exam application ID.
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Code Review
This pull request introduces logic to delete payment entities after a successful refund. My review identifies two main issues. First, in RefundTxEventListener, the post-refund operations are not atomic, which could lead to data inconsistency if one of them fails. I've suggested adding compensation logic to handle failures. Second, the new repository method deleteByExamApplicationId in PaymentJpaRepository may inadvertently perform a hard delete on an entity potentially designed for soft deletes, and it lacks an index on the query column, which could cause significant performance problems. I've flagged this as critical and recommended adding an index and verifying the deletion behavior.
| public interface PaymentJpaRepository extends JpaRepository<PaymentJpaEntity, Long>, | ||
| PaymentJpaRepositoryCustom { | ||
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| void deleteByExamApplicationId(Long examApplicationId); |
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There are two concerns with this method:
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Hard Delete vs. Soft Delete: This derived delete query will execute a direct
DELETEstatement. IfPaymentJpaEntityis configured for soft-deletes (as its parentBaseDeleteEntitymight imply), this method will perform a hard delete, bypassing the soft-delete logic (e.g.,@SQLDelete). If soft deletion is intended, this is a critical issue. You may need a custom query to perform anUPDATEfor a soft delete. -
Performance: The
exam_application_idcolumn in thepaymenttable does not have an index. ADELETEoperation on this column will result in a full table scan, which can be very slow and resource-intensive on a large table. Please consider adding an index toexam_application_idin thePaymentJpaEntitydefinition.
| quotaSyncService.sync(ctx.examId()); | ||
| log.info("[AFTER_COMMIT] 환불 성공 후 알림톡 발송 시작: orderId={}", ctx.transactionKey()); | ||
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| paymentJpaRepository.deleteByExamApplicationId(ctx.examApplicationId()); |
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The operations within afterCommitHandler are not atomic. If paymentJpaRepository.deleteByExamApplicationId() fails, the quotaSyncService.sync() operation that already succeeded will not be rolled back. This can leave the system in an inconsistent state where the application quota is decreased, but the corresponding payment record still exists.
To prevent this, you should implement a compensation mechanism by catching exceptions from the delete operation and calling a compensating action on quotaSyncService to revert the quota change.
Additionally, please see my comment on PaymentJpaRepository.java regarding potential issues with the deleteByExamApplicationId method itself (hard vs. soft delete and performance).
try {
paymentJpaRepository.deleteByExamApplicationId(ctx.examApplicationId());
} catch (Exception e) {
log.error("Failed to delete payment for examApplicationId: {}. Rolling back quota.", ctx.examApplicationId(), e);
quotaSyncService.rollbackQuota(ctx.examId());
throw e; // Rethrow to ensure failure is propagated and logged by the event listener mechanism.
}3 participants
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