feat: MonthlyRanking 엔티티 추가 및 월별 랭킹 저장 구조 정의

Author: rnqhstmd

apps/commerce-batch/src/main/java/com/loopers/batch/domain/ranking/MonthlyRanking.java

@@ -0,0 +1,50 @@
+package com.loopers.batch.domain.ranking;
+
+import com.loopers.infrastructure.converter.YearMonthAttributeConverter;
+import jakarta.persistence.*;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+
+import java.time.YearMonth;
+
+@Entity
+@Getter
+@Table(
+        name = "mv_product_rank_monthly",
+        indexes = {
+                @Index(name = "idx_monthPeriod", columnList = "month_period"),
+                @Index(name = "idx_score", columnList = "score")
+        },
+        uniqueConstraints = {
+                @UniqueConstraint(name = "uq_monthly_rank", columnNames = {"product_id", "month_period"})
+        }
+)
+@NoArgsConstructor(access = lombok.AccessLevel.PROTECTED)
+public class MonthlyRanking {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    private Long id;
+
+    @Column(name = "monthly_rank")
+    private int rank;
+
+    private Long productId;
+
+    private double score;
+
+    @Convert(converter = YearMonthAttributeConverter.class)
+    @Column(name = "month_period")
+    private YearMonth monthPeriod;
+
+    public static MonthlyRanking create(int rank, Long productId, double score, YearMonth yearMonth) {
+        MonthlyRanking monthlyRanking = new MonthlyRanking();
+
+        monthlyRanking.rank = rank;
+        monthlyRanking.productId = productId;
+        monthlyRanking.score = score;
+        monthlyRanking.monthPeriod = yearMonth;
+
+        return monthlyRanking;
+    }
+}