📌 Module 1: Spring Boot Fundamentals

• Introduction to Spring Framework & Spring Boot Philosophy
• Spring Boot Starters, Auto-Configuration, and Spring Initializr
• Creating REST Controllers, Dependency Injection, and Configuration Properties
• Application Properties, Profiles, and YAML Configuration
• Logging, Actuator, and Application Monitoring
• Building Executable JARs and WARs

📌 Module 2: RESTful Web Services & API Development

• Designing REST APIs with Spring MVC (@RestController, @RequestMapping)
• Request/Response Handling (Path Variables, Query Params, Request Body)
• Exception Handling (@ControllerAdvice, @ExceptionHandler)
• API Documentation with OpenAPI / Swagger (springdoc-openapi)
• Validation, HATEOAS, and Versioning Strategies
• Testing REST APIs with Postman and JUnit/MockMvc

📌 Module 3: Spring Data JPA & Database Integration

• Spring Data JPA Overview: Repositories, CRUD Operations
• Entity Mapping, Relationships (One-to-One, One-to-Many, Many-to-Many)
• JPQL, Native Queries, and Query Methods
• Pagination and Sorting with Spring Data
• Database Transactions (@Transactional, Isolation Levels)
• Integration with MySQL, PostgreSQL, and MongoDB
• Flyway/Liquibase for Database Migrations

📌 Module 4: Spring Security & JWT Authentication

• Spring Security Architecture (Filters, AuthenticationManager)
• In-Memory, JDBC, and Custom UserDetailsService
• JWT (JSON Web Token) Generation and Validation
• Implementing Stateless Authentication for REST APIs
• Role-Based Access Control (RBAC) and Method-Level Security
• OAuth2 with Spring Security and Keycloak Integration
• CORS, CSRF, and Security Headers

📌 Module 5: Microservices Architecture with Spring Cloud

• Microservices Principles: Domain-Driven Design, Bounded Contexts
• Service Discovery with Netflix Eureka (Service Registry)
• API Gateway with Spring Cloud Gateway (Routing, Filtering)
• Centralized Configuration with Spring Cloud Config Server (Git Backend)
• Inter-service Communication: RestTemplate, WebClient, Feign Client
• Load Balancing with Spring Cloud LoadBalancer

📌 Module 6: Resilience, Observability, and Distributed Tracing

• Resilience4j: Circuit Breaker, Retry, Rate Limiter, Time Limiter
• Fault Tolerance Patterns: Fallback Mechanisms and Bulkhead
• Distributed Tracing with Spring Cloud Sleuth and Zipkin
• Metrics with Micrometer and Prometheus + Grafana
• Centralized Logging with ELK Stack (Elasticsearch, Logstash, Kibana)

📌 Module 7: Event-Driven Microservices & Messaging

• Introduction to Asynchronous Messaging with RabbitMQ / Apache Kafka
• Spring AMQP with RabbitMQ: Producers, Consumers, Exchanges, Queues
• Spring Kafka: Sending/Receiving Messages, Error Handling
• Event Sourcing and CQRS Patterns basics
• Transactional Outbox Pattern for Reliable Messaging

📌 Module 8: Containerization with Docker & Kubernetes

• Dockerizing Spring Boot Applications (Dockerfile, Multi-stage Builds)
• Docker Compose for Multi-Container Microservices
• Introduction to Kubernetes: Pods, Services, Deployments
• ConfigMaps, Secrets, and Ingress Controllers
• Helm Charts for Packaging Kubernetes Applications
• CI/CD Pipeline Automation with GitHub Actions / Jenkins
• Deploying Microservices to AWS EKS / Google GKE

📌 Module 9: Testing & Performance Optimization

• Unit Testing with JUnit 5 and Mockito
• Integration Testing with @SpringBootTest, Testcontainers
• Performance Testing: JMeter, Gatling for Load Testing
• Caching with Spring Cache (Redis, Caffeine)
• Database Optimization: Indexing, Query Tuning, Connection Pooling

📌 Module 10: Capstone Projects