inint

module/server/mysql/gameDB.js

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+/**
+ * 游戏区服动态数据库连接工具
+ *
+ * 游戏每个区服对应独立的数据库 mir_actor_s{serverId}
+ * 该模块根据 serverId 动态创建连接池（带缓存，同一区服复用连接）
+ *
+ * 使用示例：
+ *   import getGameDB from '../mysql/gameDB.js'
+ *   const db = getGameDB(1)
+ *   const [rows] = await db.query('SELECT ...')
+ */
+
+import mysql from 'mysql2'
+import config from '../config/index.js'
+import * as log4js from '../log4js.js'
+
+// 连接池缓存，避免对同一区服重复创建
+const poolCache = new Map()
+
+/**
+ * 获取指定区服的 MySQL 连接池（Promise 包装）
+ * @param {number} serverId  区服 ID
+ * @returns {import('mysql2/promise').Pool}
+ */
+export default function getGameDB(serverId) {
+  const dbName = `mir_actor_s${serverId}`
+  if (poolCache.has(dbName)) return poolCache.get(dbName)
+
+  const pool = mysql.createPool({
+    host: config.game.dbHost || config.mysql.host,
+    port: config.game.dbPort || config.mysql.port,
+    user: config.game.dbUser || config.mysql.user,
+    password: config.game.dbPassword || config.mysql.password,
+    database: dbName,
+    connectionLimit: 5,
+    waitForConnections: true,
+  })
+
+  pool.on('error', (err) => {
+    log4js.mysql.error(`[${dbName}] 连接池错误:`, err.message)
+  })
+
+  const promisePool = pool.promise()
+  poolCache.set(dbName, promisePool)
+  return promisePool
+}