Solve Concurrency Challenges with Spring's @Transactional Annotation | HackerNoon
Briefly

The unifying challenge of the 'Personal Finance Manager' is ensuring that the data calculated matches real expenses, something that was overlooked in initial service development.
In managing user data, the 'pfm-app' microservice retrieves messages from Kafka without user identification keys, resulting in discrepancies in tracked expenses when batch processing.
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