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AWS RDS instance and snapshot management using AWS SDK for Java 2.x. \n \n Covers core RDS operations: creating and modifying DB instances, managing snapshots, parameter groups, and querying instance metadata across PostgreSQL, MySQL, Aurora, and other engines \n Includes security patterns for VPC configuration, encryption, IAM authentication, and deletion protection; Multi-AZ and automated backup setup for high availability \n Provides Spring Boot and Lambda integration examples with connection

S3 object storage patterns and operations using AWS SDK for Java 2.x. \n \n Covers bucket creation, object uploads/downloads, multipart transfers, presigned URLs, and S3 Transfer Manager for optimized file handling \n Includes synchronous and asynchronous client setup with configurable retry logic, timeouts, and connection pooling \n Provides Spring Boot integration with configuration classes, service layer patterns, and async/reactive workflows \n Supports advanced operations: metadata and encr

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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

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Master core Java programming with production-quality patterns.

Generate production-ready MCP servers in Java with the official SDK, Maven or Gradle, and reactive streams. \n \n Scaffolds complete project structure with tools, resources, and prompts organized into separate handler classes \n Includes Maven and Gradle templates with MCP SDK, SLF4J logging, Project Reactor, and JUnit 5 dependencies \n Provides ready-to-use handler templates for tools, resources, and prompts with error handling and async Mono-based responses \n Generates test suite examples and

You are an expert in refactoring Java methods.

Generate a Spring Boot 3.4.5 project skeleton with PostgreSQL, Redis, MongoDB, and Docker Compose. \n \n Scaffolds a Maven-based Spring Boot project with Java 21, including Lombok, Spring Data JPA, Spring Web, caching, and validation dependencies \n Pre-configures application.properties with connection details for PostgreSQL, Redis, and MongoDB, plus SpringDoc OpenAPI for API documentation \n Generates a docker-compose.yaml file with Redis 6, PostgreSQL 17, and MongoDB 8 services, each with pers