wehub-resource-sync
79 lines
2.0 KiB
Java
79 lines
2.0 KiB
Java
package com.example.shop;
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import org.springframework.stereotype.Service;
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import org.springframework.stereotype.Repository;
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import org.springframework.stereotype.Component;
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import org.springframework.stereotype.Controller;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.context.annotation.Bean;
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import org.springframework.context.annotation.Configuration;
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import lombok.RequiredArgsConstructor;
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// Plain interface — not a Spring bean
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public interface OrderRepository {
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void save(Order order);
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Order findById(Long id);
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}
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// @Repository stereotype — Spring-managed bean
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@Repository
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class JpaOrderRepository implements OrderRepository {
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@Override
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public void save(Order order) {}
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@Override
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public Order findById(Long id) { return null; }
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}
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// @Service with @Autowired field injection
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@Service
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class NotificationService {
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@Autowired
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private OrderRepository orderRepository;
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public void notify(Long orderId) {
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Order o = orderRepository.findById(orderId);
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}
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}
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// @Service with Lombok @RequiredArgsConstructor (constructor injection via final fields)
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@Service
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@RequiredArgsConstructor
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class OrderService {
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private final OrderRepository orderRepository;
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private final NotificationService notificationService;
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private static final String TAG = "OrderService"; // static final — NOT injected
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public void placeOrder(Order order) {
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orderRepository.save(order);
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notificationService.notify(order.getId());
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}
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}
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// @Component with explicit @Autowired constructor
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@Component
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class AuditLogger {
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private final OrderRepository orderRepository;
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@Autowired
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public AuditLogger(OrderRepository orderRepository) {
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this.orderRepository = orderRepository;
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}
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public void log(String msg) {}
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}
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// @Configuration with @Bean factory methods
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@Configuration
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class AppConfig {
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@Bean
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public OrderRepository orderRepository() {
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return new JpaOrderRepository();
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}
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}
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class Order {
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private Long id;
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public Long getId() { return id; }
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}
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