Spring Boot Programming Masterclass (50 Chapters, 10 Phases)
📌 Covered in this course:
Spring vs Spring Boot · Auto-Configuration · Starters · Embedded Tomcat · IoC & Dependency Injection · Spring Beans · Profiles & YAML · Spring MVC Controllers · @RequestParam & @PathVariable · ResponseEntity & DTOs · Jakarta Validation · @RestControllerAdvice Global Error Handling · Spring Data JPA & Hibernate · JPQL & Native SQL · JPA Entity Relationships (@OneToMany, @ManyToMany) · Flyway Migrations · Spring Security & JWT · Role-Based Access Control (RBAC) · OpenFeign & WebClient · Redis Caching · @Async & Scheduled Cron Jobs · Actuator & Prometheus · JUnit 5, Mockito & Testcontainers · Docker & Kubernetes · Spring WebFlux & Kafka · Top 50 Interview Q&A
Welcome to Our Compiler's Spring Boot Complete Master Course. Spring Boot is the world's standard Java framework for building robust enterprise backend services, microservices, and high-throughput REST APIs. From Initializr project bootstrapping, dependency injection, and JPA entity mappings to JWT security, Docker containerization, Kafka event streaming, and senior interview prep, this 50-chapter course covers every essential topic in depth.
🎯 Ready to Master Spring Boot Engineering?
Choose where to start: explore core IoC concepts, REST controllers, Spring Data JPA, Spring Security JWT, or interview prep:
📚 Master Course Curriculum
Phase 01
Introduction and Setup
01
1. Spring Boot Ante Enti?
Spring Framework · Spring Boot · Spring vs Spring Boot · Auto-configuration · Starter dependencies · Embedded server · Convention over configuration
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02
2. Prerequisites & Core Java Foundations
Java syntax · OOP · Interfaces · Collections · Exceptions · Generics · Lambdas · Streams · Maven · SQL & REST basics
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03
3. Spring Boot Setup & Initializr
JDK installation · IntelliJ IDEA / VS Code setup · Maven vs Gradle · Spring Initializr (start.spring.io) · Build & Run JAR
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04
4. Project Structure & Recommended Layout
Main application class · @SpringBootApplication · src/main/java · src/main/resources · application.properties · Package scanning
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05
5. First Spring Boot Application & Tomcat
Main class · SpringApplication.run() · Application startup · Embedded Tomcat · Default port 8080 · Changing port · Graceful shutdown
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Phase 02
Project Structure and Core Spring
06
6. IoC and Dependency Injection
Inversion of Control · Dependency Injection · Tight vs Loose coupling · Constructor injection · Setter injection · Field injection · Spring container
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07
7. Beans and Components
@Component · @Service · @Repository · @Controller · @RestController · @Bean · @Configuration · Component scanning · Singleton scope
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08
8. Bean Scopes, Lifecycle & Conditional Beans
Singleton vs Prototype scope · @Scope · @PostConstruct · @PreDestroy · Lazy initialization · @ConditionalOnProperty
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09
9. Configuration and Profiles
application.properties vs application.yml · @Value · @ConfigurationProperties · Environment variables · Development, Test, Prod profiles
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10
10. Custom Configurations & Secret Management
Profile-specific properties (application-dev.yml) · Secret management · Environment variable overrides · Property validation
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Phase 03
REST API Development & Spring MVC
11
11. HTTP and REST Basics
HTTP ante enti? · Client and server · Request & Response · GET, POST, PUT, PATCH, DELETE · Headers, Body, JSON · Status codes · Resource naming
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12
12. Controllers (@RestController & Mappings)
@RestController · @RequestMapping · @GetMapping · @PostMapping · @PutMapping · @PatchMapping · @DeleteMapping · @PathVariable · @RequestParam · ResponseEntity
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13
13. DTOs & Response Wrappers
DTO ante enti? · Entity vs DTO · Request DTO · Response DTO · Java records · Sensitive field hiding · MapStruct · Pagination DTO
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14
14. CRUD REST API & Status Codes
Create endpoint · Read all endpoint · Read by ID · Update endpoint · Partial update · Delete endpoint · Status codes (200, 201, 204, 400, 404, 409)
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15
15. Swagger UI & OpenAPI 3 Documentation
API documentation · OpenAPI 3 · Swagger UI · Endpoint descriptions · Request & Response schema · Error docs · API versioning
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Phase 04
Service and Repository Layers
16
16. Service Layer Architecture
Service layer ante enti? · Business logic · Thin controllers · @Service · Service interface & implementation · Transaction boundary
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17
17. Repository Layer & Data Access
Repository layer ante enti? · Data access logic · @Repository · Repository interface · In-memory vs Database repositories
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18
18. Layered Architecture (Controller -> Service -> Repository)
Controller layer · Service layer · Repository layer · Entity layer · DTO layer · Mapper layer · Exception layer · Package structure
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19
19. Bean Validation (@Valid & Constraints)
Why validation is needed · @Valid · @NotNull · @NotBlank · @Size · @Email · @Min · @Max · Custom validators · Error responses
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20
20. Global Exception Handling (@RestControllerAdvice)
Application exceptions · Custom exception · @ExceptionHandler · @ControllerAdvice · Global error handler · Not-found & Validation errors
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Phase 05
JPA and Databases
21
21. JPA and Hibernate ORM Basics
Database basics · JDBC overview · ORM ante enti? · JPA ante enti? · Hibernate ante enti? · Spring Data JPA · Persistence context
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22
22. Entities & Column Annotations
@Entity · @Table · @Id · @GeneratedValue · @Column · @Transient · @Enumerated · @Embedded · Audit fields (@CreatedDate)
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23
23. Spring Data Repositories (JpaRepository)
JpaRepository · CrudRepository · PagingAndSortingRepository · save · findAll · findById · deleteById · Derived queries · JPQL · Native queries
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24
24. Entity Relationships (@OneToMany, @ManyToMany)
One-to-one · One-to-many · Many-to-one · Many-to-many · @JoinColumn · mappedBy · Cascade types · Fetch types (Lazy/Eager) · Orphan removal
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25
25. Transactions (@Transactional & Propagation)
Transaction ante enti? · @Transactional · Commit · Rollback · Read-only transactions · Propagation · Isolation levels
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Phase 06
Database Migrations & Security Basics
26
26. Database Migrations (Flyway & Liquibase)
Migration ante enti? · Flyway · Liquibase · Versioned scripts (V1__init.sql) · Schema changes · Seed data · Production strategy
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27
27. Spring Security Basics & Filter Chain
Security ante enti? · Authentication · Authorization · Security filter chain · Password encoding · SecurityFilterChain · Public/Protected endpoints
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28
28. User Authentication & Password Encoders
User registration · Password hashing · PasswordEncoder (BCrypt) · UserDetails · UserDetailsService · Login · Logout · Database users
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29
29. Stateless JWT Authentication
JWT ante enti? · Access token · Refresh token · Token creation & validation · JWT filter · Request authentication · Expiry · Role claims
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30
30. Role & Permission Based Authorization
Role-based authorization · Permission-based · hasRole · hasAuthority · Method security · @PreAuthorize · Admin endpoints
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Phase 07
Testing Strategies (Unit, Mockito & Integration)
31
31. Unit Testing with JUnit 5
Why testing is needed · JUnit 5 · Assertions · Arrange-Act-Assert · Service tests · Validation tests · Exception tests · Test coverage
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32
32. Mocking Dependencies with Mockito
Mocking ante enti? · Mock repository · Mock service · Stubbing (when().thenReturn()) · Verifying calls · Argument matchers
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33
33. Controller Testing with @WebMvcTest & MockMvc
@WebMvcTest · MockMvc · GET/POST endpoint tests · Request validation tests · Status code tests · JSON response assertions
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34
34. Integration Testing with @SpringBootTest & Testcontainers
@SpringBootTest · Application context · Test database (H2) · Testcontainers · PostgreSQL integration · Full API flow testing
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35
35. Repository Testing with @DataJpaTest
@DataJpaTest · TestEntityManager · Repository query testing · Derived query verification · In-memory database setup
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Phase 08
Actuator, Logging & Observability
36
36. Spring Boot Actuator & Production Metrics
Actuator ante enti? · Health endpoint · Info endpoint · Metrics · Environment endpoint · Loggers · Custom HealthIndicator
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37
37. Structured Logging & SLF4J Logback
Logging ante enti? · Log levels (DEBUG, INFO, WARN, ERROR) · Structured logging · Sensitive data masking · Logback XML
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38
38. Observability (Micrometer, Prometheus & Grafana)
Observability ante enti? · Logs, Metrics, Traces · Micrometer · Prometheus · Grafana · Distributed tracing (@Observed, @Timed)
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39
39. Caching with Spring Cache & Redis
Caching ante enti? · @EnableCaching · @Cacheable · @CachePut · @CacheEvict · Redis CacheManager · Cache expiry
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40
40. Scheduled Tasks & Background Jobs
Scheduled tasks · @EnableScheduling · @Scheduled · Fixed delay · Fixed rate · Cron expressions ("0 0 12 * * ?") · Background cleanup
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Phase 09
Async, Messaging & Microservices Architecture
41
41. Asynchronous Programming with @Async
Synchronous vs asynchronous · @Async · TaskExecutor · CompletableFuture · Async REST calls · Thread pool tuning
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42
42. Message-Driven Architecture with Kafka & RabbitMQ
Message queues · Kafka · RabbitMQ · Producer & Consumer · Topics · Consumer groups · Retry mechanism · Dead-letter queues
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43
43. Reactive Programming with Spring WebFlux
Reactive programming · Spring WebFlux · Mono · Flux · Reactive streams · Backpressure · WebFlux vs Spring MVC
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44
44. Clean Architecture & Hexagonal Design
Layered vs Clean architecture · Hexagonal architecture · Domain layer · Application layer · Infrastructure layer · Adapters
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45
45. Microservices & Spring Cloud Overview
Microservices ante enti? · Monolith vs Microservices · Service discovery (Eureka) · API Gateway · Circuit breaker (Resilience4j) · Saga pattern
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Phase 10
Containerization, Deployment & Interview Prep
46
46. Build Tools: Maven vs Gradle
Maven · pom.xml · Dependencies · Plugins · Build lifecycle · Profiles · Gradle basics · Multi-module projects
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47
47. Dockerization & Docker Compose
Docker ante enti? · Dockerfile · Base image · Multi-stage builds · Port mapping · Environment variables · Docker Compose
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48
48. CI/CD Pipelines & Cloud Deployment
CI/CD pipelines · GitHub Actions · Jenkins · Build, test, containerize pipeline · Deployment stages · Cloud hosting (AWS/Azure/GCP)
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49
49. Our Compiler Spring Boot Backend Architecture
Entities: User, Role, Language, Tutorial, Lesson, Quiz, Question, QuizAttempt, UserProgress, Bookmark, CodeSubmission · API Routes
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50
50. Top 50 Spring Boot Technical Interview Q&A
Top 50 Spring Boot Interview Questions & Answers · Auto-configuration · Bean scopes · Security · JPA tuning
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