chore: update database connection settings and enhance Prisma client configuration

- Added connection timeout to DATABASE_URL in .env.
- Introduced DATABASE_CONNECTION_LIMIT, DATABASE_POOL_MIN, and DATABASE_POOL_MAX for connection pooling.
- Enhanced Prisma client initialization with logging and connection pool settings.
- Implemented graceful disconnection on process termination signals.

.env

@@ -5,8 +5,11 @@
 # See the documentation for all the connection string options: https://pris.ly/d/connection-strings
 
 # DATABASE_URL="sqlserver://3team.devgrr.kr:1433;database=onsitesurvey;user=sa;password=1q2w3e4r!;encrypt=true;trustServerCertificate=true;"
-DATABASE_URL="sqlserver://3team.devgrr.kr:1433;database=onsitesurvey;user=sa;password=1q2w3e4r!;encrypt=true;trustServerCertificate=true;"
+DATABASE_URL="sqlserver://3team.devgrr.kr:1433;database=onsitesurvey;user=sa;password=1q2w3e4r!;encrypt=true;trustServerCertificate=true;connectionTimeout=30000"
 # DATABASE_URL="mysql://root:root@localhost:3306/onsitesurvey"
+DATABASE_CONNECTION_LIMIT=10
+DATABASE_POOL_MIN=2
+DATABASE_POOL_MAX=10
 
 # SESSION_PASSWORD="QWERASDFZXCV1234567890REWQFDSAVCXZ"
 SESSION_PASSWORD="This application is for mobile field research"

src/libs/prisma.ts

@@ -1,11 +1,46 @@
 import { PrismaClient } from '@prisma/client'
 
-declare global {
-  var prisma: PrismaClient | undefined
+const globalForPrisma = globalThis as unknown as {
+  prisma: PrismaClient | undefined
 }
 
-export const prisma = global.prisma || new PrismaClient()
+export const prisma =
+  globalForPrisma.prisma ??
+  new PrismaClient({
+    log: ['query', 'error', 'warn'],
+    datasources: {
+      db: {
+        url: process.env.DATABASE_URL,
+      },
+    },
+    // connection pool 설정
+    connectionLimit: Number(process.env.DATABASE_CONNECTION_LIMIT) || 10, // 기본값 10
+    pool: {
+      min: Number(process.env.POOL_MIN) || 2, // 기본값 2
+      max: Number(process.env.POOL_MAX) || 10, // 기본값 10
+      idleTimeoutMillis: 30000, // 유휴 연결 타임아웃 (30초)
+      acquireTimeoutMillis: 30000, // 연결 획득 타임아웃 (30초)
+    },
+  })
 
-if (process.env.NODE_ENV !== 'production') {
-  global.prisma = prisma
-}
+prisma.$on('query', (e: any) => {
+  console.log('Query: ' + e.query)
+  console.log('Duration: ' + e.duration + 'ms')
+})
+
+prisma.$on('error', (e: any) => {
+  console.error('Prisma Error:', e)
+})
+
+// 애플리케이션 종료 시 연결 정리
+process.on('SIGINT', async () => {
+  await prisma.$disconnect()
+  process.exit(0)
+})
+
+process.on('SIGTERM', async () => {
+  await prisma.$disconnect()
+  process.exit(0)
+})
+
+if (process.env.NODE_ENV !== 'production') globalForPrisma.prisma = prisma