feat: implement course creation API

build.gradle

@@ -35,6 +35,7 @@ dependencies {
   // Workaround for AOT issue (https://github.com/spring-projects/spring-framework/pull/33949) -->
   implementation 'io.projectreactor:reactor-core'
 
+  compileOnly 'org.projectlombok:lombok'
   implementation 'org.springframework.boot:spring-boot-starter-cache'
   implementation 'org.springframework.boot:spring-boot-starter-data-jpa'
   implementation 'org.springframework.boot:spring-boot-starter-thymeleaf'
@@ -58,6 +59,8 @@ dependencies {
   testImplementation 'org.testcontainers:mysql'
   checkstyle "io.spring.javaformat:spring-javaformat-checkstyle:${springJavaformatCheckstyleVersion}"
   checkstyle "com.puppycrawl.tools:checkstyle:${checkstyleVersion}"
+
+  annotationProcessor 'org.projectlombok:lombok'
 }
 
 tasks.named('test') {

src/main/java/org/springframework/samples/petclinic/course/Course.java

@@ -0,0 +1,31 @@
+package org.springframework.samples.petclinic.course;
+
+import jakarta.persistence.Entity;
+import jakarta.persistence.EnumType;
+import jakarta.persistence.Enumerated;
+import jakarta.persistence.GeneratedValue;
+import jakarta.persistence.GenerationType;
+import jakarta.persistence.Id;
+import jakarta.persistence.JoinColumn;
+import jakarta.persistence.ManyToOne;
+import jakarta.persistence.Table;
+import lombok.Getter;
+import lombok.Setter;
+import org.springframework.samples.petclinic.model.BaseEntity;
+import org.springframework.samples.petclinic.vet.Vet;
+
+@Getter
+@Setter
+@Entity
+@Table(name = "courses")
+public class Course extends BaseEntity {
+	private String name;
+	private String description;
+	// 예: 초급, 중급, 고급
+	private String difficulty;
+
+	@ManyToOne
+	@JoinColumn(name = "vet_id")
+	private Vet instructor;
+
+}

src/main/java/org/springframework/samples/petclinic/course/CourseController.java

@@ -0,0 +1,30 @@
+package org.springframework.samples.petclinic.course;
+
+import lombok.RequiredArgsConstructor;
+import org.springframework.http.ResponseEntity;
+import org.springframework.samples.petclinic.course.dto.CreateCourseRequest;
+import org.springframework.samples.petclinic.vet.Vet;
+import org.springframework.samples.petclinic.vet.VetRepository;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RequestParam;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+@RequiredArgsConstructor
+@RequestMapping("/courses")
+public class CourseController {
+	private final CourseService courseService;
+
+
+	@PostMapping()
+	public ResponseEntity<Integer> createCourse(@RequestBody CreateCourseRequest request) {
+		System.out.println(request);
+
+		Course course = courseService.createCourse(request.getName(), request.getDescription(), request.getDescription(), request.getVetId());
+
+		return ResponseEntity.ok(course.getId());
+	}
+}

src/main/java/org/springframework/samples/petclinic/course/CourseRepository.java

@@ -0,0 +1,6 @@
+package org.springframework.samples.petclinic.course;
+
+import org.springframework.data.jpa.repository.JpaRepository;
+
+public interface CourseRepository extends JpaRepository<Course, Integer> {
+}

src/main/java/org/springframework/samples/petclinic/course/CourseService.java

@@ -0,0 +1,41 @@
+package org.springframework.samples.petclinic.course;
+
+import lombok.NoArgsConstructor;
+import lombok.RequiredArgsConstructor;
+import org.springframework.samples.petclinic.vet.Vet;
+import org.springframework.samples.petclinic.vet.VetRepository;
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
+
+import java.util.Collection;
+
+
+@Service
+@Transactional(readOnly = true)
+@RequiredArgsConstructor
+public class CourseService {
+	private final CourseRepository courseRepository;
+	private final VetRepository vetRepository;
+
+
+	@Transactional()
+	public Course createCourse(String name, String description, String difficulty, Integer vetId) {
+		Collection<Vet> all = vetRepository.findAll();
+
+		all.forEach(course -> {
+			System.out.println(course.getId());
+		});
+
+		Vet instructor = vetRepository.findById(vetId)
+			.orElseThrow(() -> new RuntimeException("Vet not found"));
+
+		Course course = new Course();
+		course.setName(name);
+		course.setDescription(description);
+		course.setDifficulty(difficulty);
+		course.setInstructor(instructor);
+		courseRepository.save(course);
+
+		return course;
+	}
+}

src/main/java/org/springframework/samples/petclinic/course/dto/CreateCourseRequest.java

@@ -0,0 +1,31 @@
+package org.springframework.samples.petclinic.course.dto;
+
+import lombok.Getter;
+
+@Getter()
+public class CreateCourseRequest {
+	private String name;
+	private String description;
+	private String difficulty;
+	private Integer vetId;
+
+	public CreateCourseRequest() {
+	}
+
+	public CreateCourseRequest(String name, String description, String difficulty, Integer vetId) {
+		this.name = name;
+		this.description = description;
+		this.difficulty = difficulty;
+		this.vetId = vetId;
+	}
+
+	@Override
+	public String toString() {
+		return "CreateCourseRequest{" +
+			"name='" + name + '\'' +
+			", description='" + description + '\'' +
+			", difficulty='" + difficulty + '\'' +
+			", vetId=" + vetId +
+			'}';
+	}
+}

src/main/java/org/springframework/samples/petclinic/vet/VetRepository.java

@@ -23,6 +23,7 @@ import org.springframework.data.repository.Repository;
 import org.springframework.transaction.annotation.Transactional;
 
 import java.util.Collection;
+import java.util.Optional;
 
 /**
  * Repository class for <code>Vet</code> domain objects All method names are compliant
@@ -37,6 +38,13 @@ import java.util.Collection;
  */
 public interface VetRepository extends Repository<Vet, Integer> {
 
+	/**
+	 * Retrieve a <code>Vet</code> from the data store.
+	 * @return a <code>Optional</code> of <code>Vet</code>
+	 */
+	@Transactional(readOnly = true)
+	Optional<Vet> findById(Integer id) throws DataAccessException;
+
 	/**
 	 * Retrieve all <code>Vet</code>s from the data store.
 	 * @return a <code>Collection</code> of <code>Vet</code>s

src/main/resources/db/h2/schema.sql

@@ -62,3 +62,13 @@ CREATE TABLE visits (
 );
 ALTER TABLE visits ADD CONSTRAINT fk_visits_pets FOREIGN KEY (pet_id) REFERENCES pets (id);
 CREATE INDEX visits_pet_id ON visits (pet_id);
+
+CREATE TABLE courses (
+  id          INTEGER GENERATED BY DEFAULT AS IDENTITY PRIMARY KEY,
+  name        VARCHAR(255),
+  description VARCHAR(1000),
+  difficulty  VARCHAR(255),
+  vet_id      INTEGER
+);
+CREATE INDEX courses_vet_id ON courses (vet_id);
+