[Test]hikariCP 멀티스레드 환경 테스트

build.gradle

@@ -55,6 +55,9 @@ dependencies {
 	compileOnly 'org.projectlombok:lombok'
 	annotationProcessor 'org.projectlombok:lombok'
 	testImplementation 'org.springframework.boot:spring-boot-starter-test'
+	// 테스트 코드에서 Lombok 사용할 경우 필요
+	testCompileOnly 'org.projectlombok:lombok'
+	testAnnotationProcessor 'org.projectlombok:lombok'
 	compileOnly 'javax:javaee-api:8.0.1'
 
 	// 테스트를 위한 h2 설정

src/main/java/com/example/Jinus/service/v2/userInfo/UserServiceV2.java

@@ -1,12 +1,11 @@
 package com.example.Jinus.service.v2.userInfo;
 
 import com.example.Jinus.repository.v2.userInfo.UserRepositoryV2;
+import jakarta.transaction.Transactional;
 import lombok.RequiredArgsConstructor;
 import lombok.extern.slf4j.Slf4j;
-import org.springframework.data.redis.core.RedisTemplate;
 import org.springframework.stereotype.Service;
 
-import java.time.Duration;
 import java.util.Map;
 import java.util.Optional;
 
@@ -39,4 +38,12 @@ public int getUserDepartmentId(String userId) {
         return parentDepartmentMap.getOrDefault(departmentId, departmentId);
     }
 
+    // hikariCP test
+    @Transactional
+    public void selectCampusIdTest(String userId) throws InterruptedException {
+        log.info("selectCampusIdTest 시작 - userId: {}", userId);
+        Thread.sleep(2500); // 커넥션을 5초간 점유 (풀 점유 시 타임아웃 유도)
+        userRepositoryV2.findCampusIdById(userId);
+        log.info("selectCampusIdTest 종료 - userId: {}", userId);
+    }
 }

src/test/java/com/example/Jinus/service/userInfo/UserServiceHikariCPTest.java

@@ -0,0 +1,75 @@
+package com.example.Jinus.service.userInfo;
+
+import com.example.Jinus.service.v2.userInfo.UserServiceV2;
+import com.zaxxer.hikari.HikariDataSource;
+import com.zaxxer.hikari.HikariPoolMXBean;
+import lombok.extern.slf4j.Slf4j;
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.test.context.ActiveProfiles;
+
+import javax.sql.DataSource;
+import java.util.concurrent.CountDownLatch;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+
+@Slf4j
+@SpringBootTest
+@ActiveProfiles("test")
+public class UserServiceHikariCPTest {
+
+    @Autowired
+    private UserServiceV2 userService;
+
+    @Autowired
+    private DataSource dataSource;
+
+    @Test
+    @DisplayName("멀티스레드 10개 생성 후 id 조회")
+    void hikariConnectionTimeoutTest() throws InterruptedException {
+        int threadCount = 10;
+        ExecutorService executor = Executors.newFixedThreadPool(threadCount);
+        CountDownLatch latch = new CountDownLatch(threadCount);
+
+        for (int i = 0; i < threadCount; i++) {
+            final int userNo = i;
+            executor.submit(() -> {
+                try {
+                    log.info(">> [{}] 서비스 호출 시작", userNo);
+                    userService.selectCampusIdTest("user" + userNo);
+                    log.info(">> [{}] 서비스 호출 완료", userNo);
+                } catch (Exception e) {
+                    log.error(">> [{}] 예외 발생: {}", userNo, e.getMessage());
+                } finally {
+                    latch.countDown();
+                }
+            });
+        }
+
+        // 커넥션 풀 상태 모니터링 (2초마다 찍기)
+        for (int i = 0; i < 5; i++) {
+            printHikariStatus();
+            Thread.sleep(2000);
+        }
+
+        latch.await();
+        executor.shutdown();
+    }
+
+    private void printHikariStatus() {
+        if (!(dataSource instanceof HikariDataSource hikariDataSource)) {
+            log.warn("데이터소스는 Hikari가 아님: {}", dataSource.getClass());
+            return;
+        }
+
+        HikariPoolMXBean poolStats = hikariDataSource.getHikariPoolMXBean();
+        log.info("### HikariCP 상태 체크 -> 총: {}, 사용 중: {}, 유휴: {}, 대기중 쓰레드: {}",
+                poolStats.getTotalConnections(),
+                poolStats.getActiveConnections(),
+                poolStats.getIdleConnections(),
+                poolStats.getThreadsAwaitingConnection()
+        );
+    }
+}

src/test/resources/application-test.properties

@@ -1,8 +1,9 @@
 # Datasource ??
 spring.datasource.driver-class-name=org.h2.Driver
-spring.datasource.url=jdbc:h2:mem:test
+spring.datasource.url=jdbc:h2:mem:testdb;DB_CLOSE_DELAY=-1
 spring.datasource.username=sa
 spring.datasource.password=
+spring.datasource.type=com.zaxxer.hikari.HikariDataSource
 
 # H2 ??????? Hibernate dialect(JPA? ??? ?????? ???? ????)
 spring.jpa.database-platform=org.hibernate.dialect.H2Dialect
@@ -14,4 +15,13 @@ spring.jpa.properties.hibernate.format_sql=true
 
 # H2 ?? ??
 spring.h2.console.enabled=true
-spring.h2.console.path=/h2
+spring.h2.console.path=/h2
+
+spring.datasource.hikari.maximumPoolSize=4
+spring.datasource.hikari.connectionTimeout=3000
+spring.datasource.hikari.maxLifetime=50000
+spring.datasource.hikari.idleTimeout=0
+spring.datasource.hikari.keepaliveTime=30000
+spring.datasource.hikari.validationTimeout=1000
+logging.level.com.zaxxer.hikari=trace
+logging.level.com.zaxxer.hikari.HikariConfig=debug