Spring Core Capstone Project

This project demonstrates a comprehensive hands-on mastery of the Spring Core module using real-world enterprise patterns. It includes all major features of Spring Core, including Bean Scopes, Dependency Injection styles, Profiles, @Value, SpEL, Component Scanning, and Lifecycle Callbacks.

📁 Project Structure

com.chandrasekhar.springcore.capstone ├── config/ # Spring @Configuration class ├── controller/ # Application entry controller ├── env/ # Environment-specific @Profile-based beans ├── model/ # Domain model (Employee) ├── repository/ # Simulated repository layer ├── service/ # Business logic & notification service ├── util/ # Utility class for SpEL expressions └── main/ # Main Application bootstrap class

🔧 Technologies Used

• Java 21
• Spring Framework 6.2.x (Core, Context)
• Annotation-based configuration
• Maven

✅ Features Demonstrated

• @Component, @Service, @Repository, @Controller stereotypes
• Constructor, Setter, and Field-based Dependency Injection (@Autowired)
• Java-based configuration using @Configuration and @Bean
• Prototype scope with manual injection via ApplicationContext
• Environment-based profiles using @Profile
• Property injection with @Value (from application.properties)
• Spring Expression Language (SpEL)
• Lifecycle methods: @PostConstruct, @PreDestroy
• Manual lifecycle with initMethod, destroyMethod
• Clean separation of concerns using a layered architecture

🚀 Running the Application

1. Set profile in main class:

   context.getEnvironment().setActiveProfiles("dev"); // or "prod"

2. Run the MainApp CapstoneApp.main()