user-service 고객 조회 api 추가

user-service/src/main/java/com/justpickup/userservice/domain/user/dto/CustomerDto.java

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+package com.justpickup.userservice.domain.user.dto;
+
+import com.justpickup.userservice.domain.user.entity.Customer;
+import lombok.Getter;
+
+@Getter
+public class CustomerDto extends UserDto {
+
+    public CustomerDto(Customer customer) {
+        super(customer);
+    }
+}

user-service/src/main/java/com/justpickup/userservice/domain/user/dto/UserDto.java

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+package com.justpickup.userservice.domain.user.dto;
+
+import com.justpickup.userservice.domain.user.entity.Customer;
+import lombok.Getter;
+
+@Getter
+public class UserDto {
+    private Long id;
+    private String password;
+    private String name;
+    private String phoneNumber;
+
+    // == 생성 메소드 == //
+    public UserDto(Customer customer) {
+        this.id = customer.getId();
+        this.password = customer.getPassword();
+        this.name = customer.getName();
+        this.phoneNumber = customer.getPhoneNumber();
+    }
+}

user-service/src/main/java/com/justpickup/userservice/domain/user/repository/CustomerRepository.java

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+package com.justpickup.userservice.domain.user.repository;
+
+import com.justpickup.userservice.domain.user.entity.Customer;
+import org.springframework.data.jpa.repository.JpaRepository;
+
+public interface CustomerRepository extends JpaRepository<Customer, Long> {
+}

user-service/src/main/java/com/justpickup/userservice/domain/user/service/UserService.java

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+package com.justpickup.userservice.domain.user.service;
+
+import com.justpickup.userservice.domain.user.dto.CustomerDto;
+
+public interface UserService {
+    CustomerDto findCustomerByUserId(Long userId);
+}

user-service/src/main/java/com/justpickup/userservice/domain/user/service/UserServiceImpl.java

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+package com.justpickup.userservice.domain.user.service;
+
+import com.justpickup.userservice.domain.user.dto.CustomerDto;
+import com.justpickup.userservice.domain.user.entity.Customer;
+import com.justpickup.userservice.domain.user.repository.CustomerRepository;
+import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
+
+import java.util.NoSuchElementException;
+
+@Service
+@RequiredArgsConstructor
+@Transactional(readOnly = true)
+@Slf4j
+public class UserServiceImpl implements UserService {
+
+    private final CustomerRepository customerRepository;
+
+    @Override
+    public CustomerDto findCustomerByUserId(Long userId) {
+        Customer customer = customerRepository.findById(userId)
+                .orElseThrow(NoSuchElementException::new);
+
+        return new CustomerDto(customer);
+    }
+}

user-service/src/main/java/com/justpickup/userservice/domain/user/web/UserController.java

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+package com.justpickup.userservice.domain.user.web;
+
+import com.justpickup.userservice.domain.user.dto.CustomerDto;
+import com.justpickup.userservice.domain.user.service.UserService;
+import com.justpickup.userservice.global.dto.Result;
+import lombok.AllArgsConstructor;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+@RequiredArgsConstructor
+@Slf4j
+public class UserController {
+
+    private final UserService userService;
+
+    @GetMapping("/customer/{userId}")
+    public ResponseEntity getCustomer(@PathVariable("userId") Long userId) {
+
+        CustomerDto customerDto = userService.findCustomerByUserId(userId);
+
+        return ResponseEntity.status(HttpStatus.OK)
+                .body(new Result<>("OK", new GetCustomerResponse(customerDto)));
+    }
+
+    @Data @NoArgsConstructor @AllArgsConstructor
+    static class GetCustomerResponse {
+        private Long userId;
+        private String userName;
+        private String phoneNumber;
+
+        public GetCustomerResponse(CustomerDto customerDto) {
+            this.userId = customerDto.getId();
+            this.userName = customerDto.getName();
+            this.phoneNumber = customerDto.getPhoneNumber();
+        }
+    }
+
+}

user-service/src/main/java/com/justpickup/userservice/global/dto/Result.java

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+package com.justpickup.userservice.global.dto;
+
+import lombok.AllArgsConstructor;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+@Data @NoArgsConstructor @AllArgsConstructor
+public class Result<T> {
+    public String message;
+    public T data;
+}