Connect with the Node.js driver

Because Astra DB is based on Apache Cassandra®, you can use Cassandra drivers to connect to your Astra DB Classic databases.

To use the Node.js driver, you need to install the driver and its dependencies, and then connect the driver to your Astra DB Classic database. Once connected, you can write scripts that use the driver to run commands against your database.

Prerequisites

Create a database.
Set the following environment variables:
- ASTRA_DB_ID: The database ID
- ASTRA_DB_REGION: A region where your database is deployed and where you want to connect to the database, such as us-east-2
- ASTRA_DB_KEYSPACE: A keyspace in your database, such as default_keyspace
- ASTRA_DB_APPLICATION_TOKEN: An application token with the Database Administrator role.
  
  The token.json has the following format:
  { "clientId": "CLIENT_ID", "secret": "CLIENT_SECRET", "token": "APPLICATION_TOKEN" }
  For driver authentication, you can use either clientId and secret or the literal string token and the AstraCS token value. If you are on an older driver version that doesn’t support the token option, then you might need to use clientId and secret. For more information, see Token details.
Download your database’s Secure Connect Bundle (SCB).
Install Node.js LTS version with npm.

Install the Node.js driver

Install the Node.js driver:
```
npm install cassandra-driver
```
If you choose to install an earlier version, make sure you choose a version that is compatible with Astra DB. For more information, see Cassandra drivers supported by DataStax.

Connect the Node.js driver

In the root of your Node.js project, create a connect-database.js file:
```
cd nodejsProject
touch connect-database.js
```

Copy the following connection code into the connect-database.js file, and then replace PATH_TO_SCB with the absolute path to your database’s Secure Connect Bundle (SCB) (secure-connect-DATABASE_NAME.zip):

connect-database.js

const cassandra = require('cassandra-driver');

const cloud = { secureConnectBundle: "PATH_TO_SCB" };
const authProvider = new cassandra.auth.PlainTextAuthProvider('token', process.env['ASTRA_DB_APPLICATION_TOKEN']);
const client = new cassandra.Client({ cloud, authProvider });

async function run() {
    await client.connect();

    // Execute a query
    const rs = await client.execute('SELECT * FROM system.local');
    console.log(Hello from cluster: ${rs.first()['cluster_name']});

    await client.shutdown();
}

This code creates a Client instance to connect to your Astra DB database, runs a CQL query, and prints the output to the console.

Save and then run connect-database.js with the Node.js runtime:
```
node connect-database.js
```
The console output includes the cluster_name value from the system.local table.
Extend or modify this script to run other commands against your database or connect to other databases. For more information, see Node.js driver documentation and Get started with DataStax drivers.

Connect the Node.js Cloud driver (deprecated)

The legacy Stargate APIs and their associated drivers are deprecated for Astra DB Classic as of September 2024, and end-of-life (EOL) is scheduled for the end of 2025. As EOL approaches, DataStax will provide migration information to support your transition to other options.

If you have questions or concerns, contact your account representative or DataStax Support.

Create a keyspace.
Create a table for your keyspace.

Install stargate-grpc-node-client using either npm or yarn:

npm
Yarn

npm i @stargate-oss/stargate-grpc-node-client

yarn add @stargate-oss/stargate-grpc-node-client

While running Stargate on Astra DB, generate a token for your database, and then add the token to the connection portion of the script.

The Bearer Token to use in the header of API calls is the same as your database’s application token, which is prefixed by AstraCS:, followed by a generated alphanumeric string.

// DB configuration
// replace with values from the Astra Portal
const astra_uri = "DATABASE_ID-REGION_NAME.apps.astra.datastax.com:443";
const bearer_token = "APPLICATION_TOKEN";

// Set up the authentication
// For Astra DB: Enter the database's application token for the bearer token
const bearerToken = new StargateBearerToken(bearer_token);
const credentials = grpc.credentials.combineChannelCredentials(
  grpc.credentials.createSsl(), bearerToken);

// Uncomment if you need to check the credentials
//console.log(credentials);

For a connection to a remote Stargate instance, like Astra DB, automatically generate on every call to the client:

// Create the gRPC client
// For Astra DB: passing the credentials created above
const stargateClient = new StargateClient(astra_uri, credentials);

console.log("made client");

// Create a promisified version of the client, so we don't need to use callbacks
const promisifiedClient = promisifyStargateClient(stargateClient);

console.log("promisified client")

Connect with the Node.js driver

Prerequisites

Install the Node.js driver

Connect the Node.js driver

Connect the Node.js Cloud driver (deprecated)

See also

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