java▌

Comprehensive Java testing with JUnit 5, Mockito, and integration testing frameworks. \n \n Covers unit testing with JUnit 5 (parameterized tests, lifecycle annotations, extensions), mocking with Mockito (stubbing, verification, BDD style), and fluent assertions with AssertJ \n Includes integration testing patterns using Spring Boot Test slices, Testcontainers for database isolation, and MockMvc for API testing \n Provides test data builders, TDD/BDD practices, and JaCoCo coverage configuration

Production-ready Spring Boot applications with REST APIs, security, data access, and monitoring. \n \n Covers REST API development with Spring MVC/WebFlux, request validation, and exception handling via @ControllerAdvice \n Includes Spring Security configuration for OAuth2, JWT authentication, method-level authorization, and CORS/CSRF protection \n Provides Spring Data JPA patterns: repositories, query methods, pagination, auditing, and transaction management \n Integrates Actuator for health ch

Automate GraalVM native image configuration, build, and error resolution for Java applications. \n \n Detects project structure (Maven/Gradle) and framework (Spring Boot, Quarkus, Micronaut) to apply framework-specific native image setup \n Adds GraalVM Native Build Tools plugins with appropriate configuration profiles and iteratively resolves build errors \n Handles common native image issues including reflection, resource access, JNI, and dynamic proxy configuration through generated metadata

You are a Java expert specializing in modern Java 21+ development with cutting-edge JVM features, Spring ecosystem mastery, and production-ready enterprise applications.

AWS KMS key management, encryption, and digital signing for Java applications with envelope encryption and Spring Boot integration. \n \n Covers key creation, encryption/decryption, envelope encryption for large data, digital signatures, and key rotation using AWS SDK for Java 2.x \n Includes synchronous and asynchronous client setup, Spring Boot service configuration, and IAM permission patterns \n Provides envelope encryption patterns to reduce KMS API calls and support data larger than 4KB li

AWS Lambda function invocation, management, and Spring Boot integration using AWS SDK for Java 2.x. \n \n Supports synchronous and asynchronous Lambda invocation with JSON payload serialization and typed response parsing \n Covers function lifecycle operations: create, update, delete, list, and retrieve configurations including environment variables and concurrency settings \n Includes Spring Boot integration patterns with bean configuration, service abstractions, and type-safe Lambda invoker se

Javadoc best practices for documenting Java types, methods, and members. \n \n Public and protected members require Javadoc comments; package-private and private members are encouraged, especially for complex code \n Use standard tags: @param for parameters, @return for return values, @throws for exceptions, @see for cross-references, and @since for version tracking \n First sentence serves as summary description and should end with a period; parameter descriptions start lowercase without period

Provides expert Java architecture expertise specializing in Java 21, Spring Boot 3, and Jakarta EE ecosystem. Designs enterprise-grade applications with modern Java features (virtual threads, pattern matching), microservices architecture, and comprehensive enterprise integration patterns for scalable, maintainable systems.

Advanced testing techniques for comprehensive test coverage.

Master Gradle build tool with Kotlin DSL for Java projects.