In modern software development, portability has become a very important factor. In backend development, it is necessary to effectively manage business rules through service abstraction, improve maintainability, and facilitate collaboration between teams. In this course, we will focus on backend development using Spring Boot, and deeply explore the concepts and implementation (methodology) of portable service abstraction.<\/p>\n
Service Abstraction is the concept of separating specific business functionalities so that developers implementing business logic are not affected by various changes in the system. Through this, developers can access functionalities through the abstracted service and minimize the impact of changes in the service implementation on the client.<\/p>\n
Spring Boot is a Java-based framework that provides various features to easily implement service abstraction. Here, we will explain how to define services using the First, add the Spring Boot starter dependency to the Define an interface for service abstraction.<\/p>\n Now, create a class that implements the interface defined above.<\/p>\n Now, we will create a controller to provide the user service in the form of a REST API.<\/p>\n In this course, we learned about how to implement portable service abstraction during backend development using Spring Boot. Service abstraction maximizes development efficiency by providing maintainability, ease of testing, and code reusability. By utilizing various features of Spring Boot to design practical services, we hope to elevate your development capabilities to the next level.<\/p>\n In the next course, we will cover database management in Spring Boot and implementing ORM through JPA\/Hibernate. We appreciate your interest!<\/p>\n@Service<\/code> annotation and inject necessary components through Dependency Injection<\/code>.<\/p>\n2.1 Setting up a Spring Boot Project<\/h3>\n
mvn archetype:generate -DgroupId=com.example -DartifactId=myapp -DarchetypeArtifactId=maven-archetype-quickstart -DinteractiveMode=false<\/code><\/pre>\n2.2 Setting dependencies<\/h3>\n
pom.xml<\/code> file.<\/p>\n<dependency>\n <groupId>org.springframework.boot<\/groupId>\n <artifactId>spring-boot-starter<\/artifactId>\n<\/dependency><\/code><\/pre>\n2.3 Defining Service Interface<\/h3>\n
public interface UserService {\n User createUser(User user);\n User getUserById(Long id);\n List<User> getAllUsers();\n void deleteUser(Long id);\n}<\/code><\/pre>\n2.4 Implementing the Service<\/h3>\n
@Service\npublic class UserServiceImpl implements UserService {\n \/\/ Inject Repository to perform database operations\n @Autowired\n private UserRepository userRepository;\n\n @Override\n public User createUser(User user) {\n return userRepository.save(user);\n }\n\n @Override\n public User getUserById(Long id) {\n return userRepository.findById(id).orElse(null);\n }\n\n @Override\n public List<User> getAllUsers() {\n return userRepository.findAll();\n }\n\n @Override\n public void deleteUser(Long id) {\n userRepository.deleteById(id);\n }\n}<\/code><\/pre>\n3. Using Services through REST API<\/h2>\n
@RestController\n@RequestMapping(\"\/api\/users\")\npublic class UserController {\n @Autowired\n private UserService userService;\n\n @PostMapping\n public ResponseEntity<User> createUser(@RequestBody User user) {\n return ResponseEntity.ok(userService.createUser(user));\n }\n\n @GetMapping(\"\/{id}\")\n public ResponseEntity<User> getUserById(@PathVariable Long id) {\n User user = userService.getUserById(id);\n return ResponseEntity.ok(user);\n }\n\n @GetMapping\n public ResponseEntity<List<User>> getAllUsers() {\n return ResponseEntity.ok(userService.getAllUsers());\n }\n\n @DeleteMapping(\"\/{id}\")\n public ResponseEntity<Void> deleteUser(@PathVariable Long id) {\n userService.deleteUser(id);\n return ResponseEntity.noContent().build();\n }\n}<\/code><\/pre>\n4. Conclusion<\/h2>\n
5. Preview of the Next Course<\/h2>\n