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Comprehensive testing patterns for Spring Boot applications covering unit, slice, integration, and container-based tests. \n \n Covers four test types with performance targets: unit tests (< 50ms), slice tests (< 100ms), integration tests (< 500ms), and full context tests with Testcontainers \n Includes patterns for Mockito-based unit testing, JPA/MVC slice testing with focused Spring contexts, and REST API testing with MockMvc and WebTestClient \n Demonstrates Spring Boot 3.5+ @S

Annotation-driven caching abstraction for Spring Boot service methods with multi-provider support. \n \n Supports multiple cache providers (ConcurrentMap, Caffeine, Redis, Ehcache, JCache) via pluggable CacheManager beans without changing business code \n Provides @Cacheable , @CachePut , @CacheEvict , and @Caching annotations with SpEL-based key generation, conditional caching, and synchronization control \n Includes configuration patterns for TTL, capacity limits, and scheduled eviction; integ

Review animation code for correct timing function selection based on interaction type.

Organize code using the standard layered pattern:

Production-ready AWS RDS configuration patterns for Spring Boot applications with Aurora, MySQL, and PostgreSQL. \n \n Supports Aurora MySQL, Aurora PostgreSQL, and standard MySQL/PostgreSQL with datasource configuration, HikariCP connection pooling, and SSL encryption \n Includes environment-specific profiles (dev/prod), Flyway database migrations, and read/write endpoint splitting for read-heavy workloads \n Provides security patterns using environment variables and AWS Secrets Manager integra

Distributed transaction management across microservices using choreography or orchestration patterns. \n \n Supports two saga approaches: choreography-based (event-driven, decoupled) and orchestration-based (centralized coordinator with easier tracking) \n Requires compensating transactions for every forward operation to ensure rollback capability and eventual consistency \n Integrates with Spring Boot 3.x, Kafka, RabbitMQ, and frameworks like Axon Framework, Eventuate Tram, and Camunda \n Empha

Spring Boot auto-configuration and declarative AI services for LangChain4j integration. \n \n Provides property-based configuration for multiple AI providers (OpenAI, Azure, Ollama) with Spring Boot starters and automatic bean wiring \n Enables interface-based AI service definitions using @AiService annotations combined with message templates and Spring dependency injection \n Supports RAG systems through configurable embedding stores (pgvector, Neo4j, Pinecone) and document ingestion pipelines

Event-Driven Architecture patterns for Spring Boot using domain events, transactional listeners, and Kafka messaging. \n \n Covers domain event design, ApplicationEventPublisher integration, and @TransactionalEventListener configuration for local event handling with AFTER_COMMIT phase guarantees \n Supports distributed messaging via Kafka and Spring Cloud Stream for inter-service communication with functional consumer beans \n Implements the transactional outbox pattern for reliable event publis

Spring Data Neo4j integration for graph databases with repositories, Cypher queries, and reactive operations. \n \n Three abstraction levels: Neo4j Client (low-level), Neo4j Template (medium-level), and Neo4j Repositories (high-level query derivation) \n Supports both imperative Neo4jRepository and reactive ReactiveNeo4jRepository patterns; do not mix both in the same application \n Entity mapping with @Node and @Relationship annotations, supporting business keys or generated IDs with immutable

Constructor-first dependency injection patterns for Spring Boot with optional collaborator handling and bean selection strategies. \n \n Prioritizes constructor injection to keep dependencies explicit, immutable, and testable without Spring context. \n Handles optional dependencies through guarded setters, ObjectProvider, and deterministic no-op defaults. \n Resolves bean ambiguity using @Primary, @Qualifier, profiles, and conditional annotations (@ConditionalOnProperty, @ConditionalOnMissingBea