Connection Pooling in Node.js

Maximize database throughput by reusing database connections effectively in Node.js for MongoDB, reducing connection overhead for RAG status checks.

const { MongoClient } = require('mongodb');

// Connection URL
cost url = 'mongodb://localhost:27017';
// Database Name
const dbName = 'myDatabase';

// Create a new MongoClient
const client = new MongoClient(url, {
  useNewUrlParser: true,
  useUnifiedTopology: true,
  poolSize: 10 // set the pool size to 10 connections
});

async function main() {
  try {
    // Use connect method to connect to the server
    await client.connect();
    console.log('Connected to database');

    const db = client.db(dbName);
    // RAG status checks or other operations can be done here using the `db`
    // For example, check status:
    // const status = await db.collection('status').findOne({color: 'red'});

  } finally {
    // Ensures that the client will close when you finish/error
    await client.close();
  }
}

main().catch(console.error);

This code snippet demonstrates how to set up a connection pool using MongoDB's official Node.js driver. Initially, it imports the necessary MongoClient class from the mongodb package. It then establishes a new MongoClient with a specific connection URL and database name. Moreover, it sets the poolSize option during client instantiation, which controls the maximum number of connections in the pool. The main function connects to the database, performs operations, and then closes the connection. You would place RAG status checks or other database operations within the try block.