Добавлен connManager для управления пулами соединений к базам Sqlite, попутный рефакторинг

server/core/connManager.js

@@ -0,0 +1,26 @@
+const SqliteConnectionPool = require('./SqliteConnectionPool');
+
+class ConnManager {
+    constructor() {
+        this._pool = {};
+    }
+
+    async init(config) {
+        this.config = config;
+        for (const poolConfig of this.config.db) {
+            const dbFileName = this.config.dataDir + '/' + poolConfig.fileName;
+            const connPool = new SqliteConnectionPool();
+            await connPool.open(poolConfig.connCount, dbFileName);
+
+            this._pool[poolConfig.poolName] = connPool;
+        }
+    }
+
+    get pool() {
+        return this._pool;
+    }
+}
+
+const connManager = new ConnManager();
+
+module.exports = connManager;