Code Mill Hub | Backend Engineering https://code-mill-hub.com/blog/ Deep dives into Java, Spring Boot, and high-performance backend architecture. en-us shflzp12@gmail.com (Maria) shflzp12@gmail.com (Maria) Tue, 26 May 2026 00:00:00 GMT https://code-mill-hub.com/blog/spring-boot/2026-05-26-214937-post/ Beyond CRUD: Implementing Event Sourcing with Spring Boot, Kafka, and PostgreSQL https://code-mill-hub.com/blog/spring-boot/2026-05-26-214937-post/ Discover how Event Sourcing revolutionizes state management in microservices by storing all changes as a sequence of events, enabling powerful auditability, temporal querying, and unparalleled scalability with Spring Boot, Kafka, and PostgreSQL. Tue, 26 May 2026 00:00:00 GMT shflzp12@gmail.com (Maria) EventSourcingMicroservicesSpring BootApache KafkaPostgreSQLBackend ArchitectureJava https://code-mill-hub.com/blog/spring-boot/2026-05-29-215506-post/ Building Resilient Microservices: Mastering Failure Handling with Spring Boot and Resilience4j https://code-mill-hub.com/blog/spring-boot/2026-05-29-215506-post/ Discover how to fortify your Spring Boot microservices against cascading failures and unreliable dependencies by implementing robust resilience patterns like Circuit Breaker, Retry, and Rate Limiter using Resilience4j. Fri, 29 May 2026 00:00:00 GMT shflzp12@gmail.com (Maria) Spring BootResilienceMicroservicesResilience4jJavaBackend Architecture https://code-mill-hub.com/blog/spring-boot/2026-06-01-223535-post/ Mastering Real-time Projections: Building Materialized Views with Kafka Streams, Spring Boot, and PostgreSQL https://code-mill-hub.com/blog/spring-boot/2026-06-01-223535-post/ In event-driven architectures, building performant and continuously updated read models from complex event streams is a significant challenge. This post deep-dives into leveraging Kafka Streams within Spring Boot to construct real-time, resilient materialized views, solving the complexities of data projection for scalable microservices. Mon, 01 Jun 2026 00:00:00 GMT shflzp12@gmail.com (Maria) Kafka StreamsSpring BootCQRSEvent-DrivenMaterialized ViewsPostgreSQLJava https://code-mill-hub.com/blog/spring-boot/2026-06-02-mastering-optimistic-concurrency-event-sourcing-spring-boot/ Ensuring Aggregate Consistency: Mastering Optimistic Concurrency Control in Event-Sourced Spring Boot Microservices https://code-mill-hub.com/blog/spring-boot/2026-06-02-mastering-optimistic-concurrency-event-sourcing-spring-boot/ This deep dive explores how to maintain data integrity and prevent lost updates in event-sourced Spring Boot microservices by implementing robust Optimistic Concurrency Control, a crucial pattern for building resilient and consistent distributed systems. Tue, 02 Jun 2026 00:00:00 GMT shflzp12@gmail.com (Maria) JavaSpring BootEvent SourcingOptimistic LockingMicroservicesConcurrencyJPAKafka