refactor(course): add debug log level, logging Course

Author: javajigi

src/main/java/lms/domain/Course.java

@@ -9,20 +9,23 @@ public class Course {
 
     private Long creatorId;
 
-    private LocalDateTime createdDate;
+    private LocalDateTime createdAt;
 
-    private LocalDateTime updatedDate;
+    private LocalDateTime updatedAt;
+
+    public Course() {
+    }
 
     public Course(String title, Long creatorId) {
         this(0L, title, creatorId, LocalDateTime.now(), null);
     }
 
-    public Course(Long id, String title, Long creatorId, LocalDateTime createdDate, LocalDateTime updatedDate) {
+    public Course(Long id, String title, Long creatorId, LocalDateTime createdAt, LocalDateTime updatedAt) {
         this.id = id;
         this.title = title;
         this.creatorId = creatorId;
-        this.createdDate = createdDate;
-        this.updatedDate = updatedDate;
+        this.createdAt = createdAt;
+        this.updatedAt = updatedAt;
     }
 
     public String getTitle() {
@@ -33,8 +36,8 @@ public Long getCreatorId() {
         return creatorId;
     }
 
-    public LocalDateTime getCreatedDate() {
-        return createdDate;
+    public LocalDateTime getCreatedAt() {
+        return createdAt;
     }
 
     @Override
@@ -43,8 +46,8 @@ public String toString() {
                 "id=" + id +
                 ", title='" + title + '\'' +
                 ", creatorId=" + creatorId +
-                ", createdDate=" + createdDate +
-                ", updatedDate=" + updatedDate +
+                ", createdAt=" + createdAt +
+                ", updatedAt=" + updatedAt +
                 '}';
     }
 }

src/main/java/lms/infrastructure/JdbcCourseRepository.java

@@ -3,38 +3,34 @@
 import lms.domain.Course;
 import lms.domain.CourseRepository;
 import org.springframework.beans.factory.annotation.Autowired;
-import org.springframework.jdbc.core.JdbcTemplate;
+import org.springframework.jdbc.core.JdbcOperations;
 import org.springframework.jdbc.core.RowMapper;
 import org.springframework.stereotype.Repository;
 
-import java.sql.ResultSet;
-import java.sql.SQLException;
 import java.sql.Timestamp;
 import java.time.LocalDateTime;
 
 @Repository("courseRepository")
 public class JdbcCourseRepository implements CourseRepository {
     @Autowired
-    private JdbcTemplate jdbcTemplate;
+    private JdbcOperations jdbcTemplate;
 
     @Override
     public int save(Course course) {
         String sql = "insert into course (title, creator_id, created_at) values(?, ?, ?)";
-        return jdbcTemplate.update(
-                sql,
-                course.getTitle(), course.getCreatorId(), course.getCreatedDate());
+        return jdbcTemplate.update(sql, course.getTitle(), course.getCreatorId(), course.getCreatedAt());
     }
 
     @Override
     public Course findById(Long id) {
         String sql = "select id, title, creator_id, created_at, updated_at from course where id = ?";
-        RowMapper<Course> courseRowMapper = (rs, rowNum) -> new Course(
+        RowMapper<Course> rowMapper = (rs, rowNum) -> new Course(
                 rs.getLong(1),
                 rs.getString(2),
                 rs.getLong(3),
                 toLocalDateTime(rs.getTimestamp(4)),
                 toLocalDateTime(rs.getTimestamp(5)));
-        return jdbcTemplate.queryForObject(sql, courseRowMapper, id);
+        return jdbcTemplate.queryForObject(sql, rowMapper, id);
     }
 
     private LocalDateTime toLocalDateTime(Timestamp timestamp) {

src/main/resources/logback.xml

@@ -9,6 +9,8 @@
 
     <logger name="qna" level="DEBUG"/>
 
+    <logger name="lms" level="DEBUG"/>
+
     <root level="INFO">
         <appender-ref ref="STDOUT"/>
     </root>

src/test/java/lms/infrastruecture/CourseRepositoryTest.java

@@ -5,11 +5,15 @@
 import lms.domain.Course;
 import lms.domain.CourseRepository;
 import org.junit.jupiter.api.Test;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.test.context.SpringBootTest;
 
 @SpringBootTest
 public class CourseRepositoryTest {
+    private static final Logger LOGGER = LoggerFactory.getLogger(CourseRepositoryTest.class);
+
     @Autowired
     private CourseRepository courseRepository;
 
@@ -19,6 +23,7 @@ void crud() {
         int count = courseRepository.save(course);
         assertThat(count).isEqualTo(1);
         Course savedCourse = courseRepository.findById(1L);
-        assertThat(course.getTitle()).isEqualTo(course.getTitle());
+        assertThat(course.getTitle()).isEqualTo(savedCourse.getTitle());
+        LOGGER.debug("Course: {}", savedCourse);
     }
 }