backend-module-structure

To enforce clean architecture in a Java backend, define strict module placement rules and dependency directions. This prevents cross-module dependencies by specifying where entities, repositories, and services belong within the project structure, improving overall maintainability.

The correct Maven module structure organizes Java backend code into distinct modules with enforced dependency flows. It separates domain logic from query repositories, ensuring read-model assembly follows clean architecture principles without unauthorized cross-module dependencies.

Differentiating domain and query repositories involves separating write-side domain logic from read-model assembly. Place domain repositories with core entities and query repositories in distinct modules to enforce clean architecture and maintain correct dependency directions.

Place entities, repositories, and services in specific Maven modules following clean architecture rules. Code placement dictates that domain logic remains isolated, preventing unauthorized cross-module dependencies and ensuring the backend module structure stays maintainable.

Running backend tests for Java Maven modules requires following specific building instructions. Execute the Maven build lifecycle commands configured for the module structure to validate code placement and ensure no cross-module dependencies exist in the backend.

Cross-module dependency issues in a Java backend occur when code placement violates clean architecture rules. Correcting the Maven module structure and enforcing proper dependency directions for entities and services resolves these maintainability problems.