完成安装嬴图Node.js SDK，设置一个运行的嬴图实例后，可以开始将您的应用连接到嬴图数据库。

ConnectionPool

可以使用ConnectionPool指定所需的连接池信息，从而建立与嬴图数据库的连接。

以下是ConnectionPool的所有可用配置项：

连接到集群

以下示例展示如何连接到集群并使用图集default。

import { ConnectionPool } from "@ultipa-graph/ultipa-node-sdk";
import fs from "fs";

let sdkUsage = async () => {

  let hosts = [
    "192.168.1.85:60061", 
    "192.168.1.86:60061", 
    "192.168.1.87:60061"
  ];
  let username = "***";
  let password = "***";
  let crt: Buffer;
  { // 使用证书（Crt）
    let crt_file_path = "./ultipa.crt";
    crt = fs.readFileSync(crt_file_path);
  }
  let connPool = new ConnectionPool(hosts, username, password, crt);
  
  let conn = await connPool.getActive();
  let isSuccess = await conn.test();
  console.log(isSuccess);
};

sdkUsage().then(console.log).catch(console.log);

连接到嬴图Cloud

以下示例展示如何连接到嬴图Cloud实例并使用图集default。

import { ConnectionPool } from "@ultipa-graph/ultipa-node-sdk";

let sdkUsage = async () => {

  let hosts = ["3xbotdjas.us-east-1.cloud.ultipa.com:60010"];
  let username = "***";
  let password = "***";
  let otherParams = {
    isHttps: true,
    isHttp: false
  };
  let connPool = new ConnectionPool(hosts, username, password, undefined, undefined, otherParams);
  
  let conn = await connPool.getActive();
  let isSuccess = await conn.test();
  console.log(isSuccess);
};

sdkUsage().then(console.log).catch(console.log);

配置项

以下是UltipaConfig的所有可用配置项：

测试连接

使用Connection对象的test()方法可以检查连接。

let resp = await conn.test();
console.log(resp);

true