Setting Up NodeJS Redshift Integration: 3 Easy Steps

Companies use various technologies to create fast, scalable, and flexible applications to meet their business requirements. These applications generate huge volumes of data that need to be stored and analyzed for optimizing business operations. NodeJS is a cross-platform JavaScript runtime environment widely used to create scalable web applications.

Companies usually store their business data in Data Warehouses to further analyze it. Amazon Redshift is a Cloud Data Warehouse service that helps organizations store large chunks of data to get a unified view of data. Connecting NodeJS Redshift enables the application to query data from the Data Warehouse or upload data directly to Amazon Redshift.

NodeJS Redshift Integration allows companies to create fast and scalable applications that can access huge volumes of data. In this article, you will learn about the steps to set up NodeJS Redshift Integration. You will also read about some of the benefits of using NodeJS Redshift Integration.

Prerequisites

• NodeJS installed on your local system.

What is NodeJS?

Node.js is an open-source JavaScript runtime environment that is cross-platform and back-end and runs on the V8 engine. As JavaScript can only be executed in the Browser window which limits its accessibility and usability. Node.js help Developers to communicate with the system outside the Browser and allows applications to execute command outside the Browser. It is designed to build scalable and flexible network applications.

Node.js is used to optimize the throughput and scalability of modern web applications along with multiple I/O operations. It uses asynchronous programming to ensure that the application doesn’t stop while waiting for some requests and deliver a seamless experience. No function in Node.js directly performs I/O, the process never blocks. The only case is when the I/O is performed using synchronous methods of the Node.js standard library. 

Key Features of NodeJS

Some of the main features of NodeJS are listed below.

• Fast and Reliable: Node.js is built on Google Chrome V8 Engine. Also, it has a very fast library for code execution. 
• Asynchronous: Node.js comes with a non-blocking interface because all of its libraries are asynchronous. The server never waits for the API to return data and continues the application.
• No-Buffering: Applications built with Node.js don’t buffer any data because the applications output the data in chunks.
• Scalable: With the help of the Cluster module, Node.js can handle multiple concurrent requests effectively.

To know more about Node.js, click here.

What is Amazon Redshift?

Amazon Redshift is a Cloud Data Warehouse offered by Amazon Web Services (AWS) to let organizations store and analyze their business data efficiently. It delivers high performance and faster query processing that helps companies process and analyzes their huge volumes of data quickly. With the help of its Columnar Data Storage and Massive Parallel Processing (MPP). 

It has its own compute engine to perform computing and generate critical insights and can handle exabytes scale of data efficiently. Also, it is a column-oriented Data Warehouse that stores data in a columnar format.

Amazon Redshift ensures data privacy and protection using an extra layer of security for users’ data. It offers integrations with many 3rd party apps and services widely used by organizations in their daily activities to ensure easy data accessibility.

Key Features of Amazon Redshift

Some of the main features of Amazon Redshift are listed below.

• End-to-End Encryption: Amazon Redshift offers high-class security features. Users can easily set up SSL for data transfer and AES 256 Encryption for hardware at rest.
• Concurrency: Amazon Redshift help users run thousands of concurrent queries without affecting the performance. Also, it increases the computation capacity automatically as the workload increases.
• Massively Parallel Processing: Amazon Redshift offers faster query processing and high performance by running many queries concurrently in different clusters and distributing workload on other processors.
• Redshift ML: With the help of Redshift ML, users can easily create, test, and deploy their Machine Learning models using data stored in Amazon Redshift using standard SQL language.

To learn more about Amazon Redshift, click here.

Setting Up NodeJS Redshift Integration

Now that you have understood about Amazon Redshift and Node.js. In this section, you will learn about the steps to connect NodeJS Redshift. For this tutorial, you will need the node-redshift library. The following steps to set up NodeJS Redshift Integration are listed below.

• Step 1: Installing the Package
• Step 2: Setting Up the NodeJS Redshift Connection
• Step 3: Querying Redshift From NodeJS

Step 1: Installing the Package

• Open up your terminal window.
• Now, you need to install the NodeJS Redshift package so that you can access Amazon Redshift features.
• To install the NodeJS Redshift package, run the following command given below.

npm install node-redshift

Step 2: Setting Up the NodeJS Redshift Connection

• Create a file named “redshift.js” and open this file.
• To Connect to NodeJS Redshift, you need to provide the credentials to connect to NodeJS Redshift.
• For this, you need to create a new Redshift object and pass the Database name, port, host, and credentials information to it.
• The sample code to connect to NodeJS Redshift is given below.

var Redshift = require('node-redshift');
 var client = {
  user: user,
  database: database,
  password: password,
  port: port,
  host: host,
};
var redshiftClient = new Redshift(client, [options]);
module.exports = redshiftClient;

• There are 2 ways to setup NodeJS Redshift Connection, listed below:
  • Connection Pooling: Connection Pooling is a default connection, and users can open this connection to Amazon Redshift with the help of pg-pool.
  • Raw Connection: Raw Connection is a one-time connection that requires manually initializing and close connections for running queries. It needs an extra ode to handle when to connect or disconnect from NodeJS Redshift Connection.

Step 3: Querying Redshift From NodeJS

• Both Raw Connection and Connection Pooling support 2 types of query functions that are bound to the initialized Redshift object – query() and a parameterizedQuery().
• Both the functions support callback and promise style. 
• The code to query data using Raw Connection from NodeJS Redshift is given below.

//raw connection
var redshiftClient = require('./redshift.js');

redshiftClient.connect(function(err){
  if(err) throw err;
  else{
    redshiftClient.query('SELECT * FROM "TableName"', [options], function(err, data){
      if(err) throw err;
      else{
        console.log(data);
        redshiftClient.close();
      }
    });
  }
});

• Similarly, the code to query data using Connection Pooling from NodeJS Redshift is given below.

//connection pool
var redshiftClient = require('./redshift.js');

redshiftClient.query(queryString, [options])
.then(function(data){
    console.log(data);
})
.catch(function(err){
    console.error(err);
});

• If you want to use SQL queries for querying Redshift using NodeJS, then you can use the parameterizeQuery() function.
• The code to query data using parameterizeQuery() function from NodeJS Redshift is given below.

//connection pool
var redshiftClient = require('./redshift.js');


redshiftClient.parameterizedQuery('SELECT * FROM "TableName" WHERE "parameter" = $1', [42], [options], function(err, data){
  if(err) throw err;
  else{
    console.log(data);
  }
});

• You can also make one-time raw query requests without connecting disconnecting the NodeJS Redshift connection manually, then you can use rawQuery() function.
• The following code to query NodeJS Redshift using rawQuery() is given below.

//connection pool
var redshiftClient = require('./redshift.js');

redshiftClient.rawQuery('SELECT * FROM "TableName"', [options], function(err, data){
  if(err) throw err;
  else{
    console.log(data);
  }
});

That’s it! You have completed the NodeJS Redshift Integration.

Benefits of NodeJS Redshift Integration

A few benefits of using NodeJS Redshift Integration are listed below:

• NodeJS Redshift Integration allows Developers to create a scalable and flexible application that can load data directly from the Amazon Redshift.
• NodeJS Redshift Integration helps in tracking the event data and sending it to the Amazon Redshift.
• NodeJS Redshift Integration helps in developing specific Data Integration requirements.

Conclusion

In this article, you learnt about Amazon Redshift, NodeJS, and the steps to set up NodeJS Redshift Integration. You also read about different ways to query NodeJS Redshift and a few benefits of using NodeJS Redshift Integration. Developers can make specialized apps used for a specific purpose or perform integrations with other apps.

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