连接

安装嬴图Node.js驱动并部署一个嬴图实例后，就可以将应用与数据库连接了。

你可以使用UltipaConfig配置连接，点击查看UltipaConfig属性。

建立连接

使用UltipaDriver()创建连接：

import { UltipaDriver } from "@ultipa-graph/ultipa-driver";
import { ULTIPA } from "@ultipa-graph/ultipa-driver/dist/types";

let sdkUsage = async () => {
  // URI example: ultipaConfig.hosts: ["mqj4zouys.us-east-1.cloud.ultipa.com:60010"]
  const ultipaConfig: ULTIPA.UltipaConfig = {
    hosts: ["192.168.1.85:60061", "192.168.1.86:60061", "192.168.1.87:60061"],
    username: "<username>",
    password: "<password>",
  };

  const conn = new UltipaDriver(ultipaConfig);
  
  // Tests the connection

  const isSuccess = await conn.test();
  console.log(`Connection succeeds: ${isSuccess}`);
};

sdkUsage().catch(console.error);

Connection succeeds: true

使用配置文件

本例演示如何使用配置文件.env建立连接：

import { UltipaDriver } from "@ultipa-graph/ultipa-driver";
import { ULTIPA } from "@ultipa-graph/ultipa-driver/dist/types";
import * as dotenv from "dotenv";

// Loads the .env file and overrides system environment variables
dotenv.config({override:true});

const hosts = process.env.hosts?.split(',') || [];
const username = process.env.username!;
const password = process.env.password!;

const sdkUsage = async () => {
  // URI example: ultipaConfig.hosts: ["mqj4zouys.us-east-1.cloud.ultipa.com:60010"]
  const ultipaConfig: ULTIPA.UltipaConfig = {
    hosts: hosts,
    username: username,
    password: password,
  };

  const conn = new UltipaDriver(ultipaConfig);

  // Tests the connection

  const isSuccess = await conn.test();
  console.log(`Connection succeeds: ${isSuccess}`);
};

sdkUsage().catch(console.error);

Connection succeeds: true

Example of the .env file:

// hosts=https://mqj4zouys.us-east-1.cloud.ultipa.com:60010
hosts=192.168.1.85:60061,192.168.1.86:60061,192.168.1.87:60061
username=<username>
password=<password>
passwordEncrypt=MD5
defaultGraph=miniCircle
// crt=F:\\ultipa.crt
// maxRecvSize=10240

UltipaConfig属性

UltipaConfig 类有以下属性：