512-frameworks-micronaut-data

Micronaut Data entity mapping uses @MappedEntity annotations, and custom repositories are defined by extending data interfaces to handle CRUD operations and relations. This approach provides structured data access patterns for relational databases.

Transaction management in Micronaut is handled using the @Transactional annotation. Applying this to repository methods ensures that database operations execute safely, maintaining data integrity during complex relational updates and CRUD sequences.

DTO projections in Micronaut Data optimize database queries by selecting only the needed fields into a data transfer object. This reduces memory overhead and improves query performance when working with relational databases.

Micronaut Data supports pagination for handling large relational datasets. By using pageable query parameters in your repository methods, you can efficiently retrieve chunks of records, preventing memory overload and improving application responsiveness.

Testing Micronaut Data repositories uses @MicronautTest combined with TestPropertyProvider to inject test database configurations. This verifies that entity mappings, CRUD operations, and transaction logic function correctly before deployment.