CQRS (Command Query Responsibility Segregation) separates write operations from read operations using different optimized models. Spring Modulith helps structure applications into loosely coupled modules organized by business capability rather than technical concerns. The implementation uses domain events for asynchronous communication between modules, with the command side handling ticket booking/cancellation and the query side managing movie searches and seat availability. Spring Modulith's @ApplicationModuleListener enables eventual consistency through the transactional outbox pattern, while jMolecules annotations clarify architectural roles.
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