await

tools/app/promise-learn/build/index.js

@@ -1,27 +1,47 @@
 "use strict";
-const mariadb = require('mariadb');
+var __importDefault = (this && this.__importDefault) || function (mod) {
+    return (mod && mod.__esModule) ? mod : { "default": mod };
+};
+Object.defineProperty(exports, "__esModule", { value: true });
+const mariadb_1 = __importDefault(require("mariadb"));
 let conn;
-mariadb.createConnection({
-    host: 'database',
-    user: 'heroes',
-    password: 'test123',
-    database: 'heroes'
-})
-    .then(conn => {
-    conn.query("SELECT * FROM hero")
-        .then((rows) => {
-        console.log(rows);
-        return rows;
+class DbHandle {
+    constructor() { }
+    async connect() {
+        this._conn = await mariadb_1.default.createConnection({
+            host: '172.16.10.18',
+            user: 'heroes',
+            password: 'test123',
+            database: 'heroes'
+        });
+    }
+    get(stmt) {
+        var _a, _b;
+        return (_b = (_a = this._conn) === null || _a === void 0 ? void 0 : _a.query(stmt)) !== null && _b !== void 0 ? _b : Promise.reject(new Error('Connection not ready 1'));
+    }
+    close() {
+        var _a, _b;
+        return (_b = (_a = this._conn) === null || _a === void 0 ? void 0 : _a.end()) !== null && _b !== void 0 ? _b : Promise.reject(new Error('Connection not ready 2'));
+    }
+}
+const dbHandle = new DbHandle();
+/*
+dbHandle.connect()
+    .then(() => dbHandle.get("SELECT * FROM hero"))
+    .then((result) => {
+        console.log(result)
+        return dbHandle.close()
     })
-        .then((res) => {
-        console.log(res);
-        conn.end();
-    })
-        .catch(err => {
-        console.log(err);
-        conn.end();
-    });
+    .catch((err) => {
+        console.log(err)
+    }
+    
+*/
+dbHandle.get("SELECT * FROM hero")
+    .then((result) => {
+    console.log(result);
+    return dbHandle.close();
 })
-    .catch(err => {
-    console.log('not connected');
+    .catch((err) => {
+    console.log(err.message);
 });