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Unit testing patterns for Spring @ExceptionHandler and @ControllerAdvice global exception handlers. \n \n Test exception-to-error-response transformations and HTTP status codes us…
Distributed transaction management across microservices using choreography or orchestration patterns. \n \n Supports two saga approaches: choreography-based (event-driven, decoupl…
Spring Boot auto-configuration and declarative AI services for LangChain4j integration. \n \n Provides property-based configuration for multiple AI providers (OpenAI, Azure, Ollam…
Unit testing JSON serialization and deserialization with Spring's @JsonTest and Jackson. \n \n Covers serialization/deserialization of POJOs, custom serializers/deserializers, fie…
This skill provides comprehensive guidance for implementing Clean Architecture, Hexagonal Architecture (Ports & Adapters), and Domain-Driven Design tactical patterns in Java…
JUnit 5 patterns for testing utility classes, static methods, and pure functions without mocking complexity. \n \n Covers testing strategies for string manipulation, calculations,…
Advanced prompt patterns for few-shot learning, chain-of-thought reasoning, optimization, templates, and system prompt design. \n \n Covers five core pattern categories: few-shot…
Unit test external REST API integrations with WireMock HTTP mocking and request verification. \n \n Stub HTTP responses with configurable status codes, headers, and JSON bodies; v…
Complete Retrieval-Augmented Generation systems with LangChain4j for knowledge-enhanced AI applications. \n \n Document ingestion pipelines with configurable chunking, metadata ma…
Spring Data Neo4j integration for graph databases with repositories, Cypher queries, and reactive operations. \n \n Three abstraction levels: Neo4j Client (low-level), Neo4j Templ…
