[feat] 박수 기능 엔티티(Stamp, Clap) 구조 추가 및 동시성 대응 - #623

src/main/java/org/sopt/app/domain/entity/soptamp/Clap.java

@@ -0,0 +1,56 @@
+package org.sopt.app.domain.entity.soptamp;
+
+import org.hibernate.annotations.Check;
+import org.sopt.app.domain.entity.BaseEntity;
+
+import jakarta.persistence.Column;
+import jakarta.persistence.Entity;
+import jakarta.persistence.GeneratedValue;
+import jakarta.persistence.GenerationType;
+import jakarta.persistence.Id;
+import jakarta.persistence.Table;
+import jakarta.persistence.UniqueConstraint;
+import jakarta.persistence.Version;
+import lombok.AccessLevel;
+import lombok.AllArgsConstructor;
+import lombok.Builder;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+
+@Entity
+@Getter
+@Builder
+@NoArgsConstructor(access = AccessLevel.PROTECTED)
+@AllArgsConstructor(access = AccessLevel.PROTECTED)
+@Table(
+	name = "clap",
+	uniqueConstraints = @UniqueConstraint(
+		name = "uk_clap_stamp_user",
+		columnNames = {"stamp_id", "user_id"}
+	)
+)
+@Check(constraints = "clap_count >= 0 AND clap_count <= 50")
+public class Clap extends BaseEntity {
+
+	@Id
+	@GeneratedValue(strategy = GenerationType.IDENTITY)
+	private Long id;
+
+	@Column(name = "stamp_id", nullable = false)
+	private Long stampId;
+
+	@Column(name = "user_id", nullable = false)
+	private Long userId;
+
+	@Column(name = "clap_count", nullable = false)
+	private int clapCount = 0;
+
+	@Version
+	private Long version;
+
+	public void incrementClapCount(int increment) {
+		if (increment <= 0) return;
+		int nextCount = this.clapCount + increment;
+		this.clapCount = Math.min(nextCount, 50);
+	}
+}

src/main/java/org/sopt/app/domain/entity/soptamp/Stamp.java

@@ -34,6 +34,13 @@ public class Stamp extends BaseEntity {
     @Column(length = 10)
     private String activityDate;
 
+    private int clapCount = 0;
+
+    private int viewCount = 0;
+
+    @Version
+    private Long version;
+
     public void changeContents(String contents) {
         this.contents = contents;
     }
@@ -61,4 +68,13 @@ public void validate() {
         }
     }
 
+    public void incrementClapCount(int increment) {
+        if (increment <= 0) return;
+        this.clapCount += increment;
+    }
+
+    public void incrementViewCount() {
+        this.viewCount += 1;
+    }
+
 }