Explained - Message Queuing Telemetry Transport (MQTT)

Ever wondered how your smart thermostat "talks" to your phone, or how a sensor on an oil pipeline sends data thousands of miles away? Chances are, MQTT is behind it. What is MQTT? MQTT (Message Queuing Telemetry Transport) is a lightweight messaging protocol designed to send small packets of data between devices — even over slow, unreliable, or low-bandwidth networks. Think of it as a postal system optimised for postcards, not packages. … Read More

Explained - Distributed Storage Systems

The blog post explores distributed storage systems, discussing their architecture, benefits, and key technologies like consistency models and replication. It covers use cases, scalability, fault tolerance, and the evolution of storage solutions for modern applications. Read More

Okta - PKCE Verification Failed while requesting token

Understand and resolve the "PKCE verification failed" error when integrating with Okta. This guide explains common causes, such as mismatched code verifiers, and provides troubleshooting steps to ensure secure and successful OAuth 2.0 authentication flows. Read More

AWS - How to rename an AWS Lambda function?

The blog post provides a step-by-step guide on how to rename an AWS Lambda function, including considerations for preserving configurations, updating dependencies, and ensuring proper function invocation. Read More

Groovy - What is Memoization?

Learn about memoization in Groovy, a powerful technique to optimize performance by caching function results. Understand how it works, its benefits, and how to implement memoization effectively to reduce redundant computations in your applications. Read More

Groovy - How to read and write to excel sheets with Groovy?

Scriptom provides a simple COM library for Groovy. It is a Groovy wrapper around JACOB (Java COM Bridge) which provides access to COM Automation components. Scriptom can be used to work with MS Office tools, Internet Explorer or any other Microsoft Windows COM based components. In this article, you will use Scriptom to read and write to excel files. Read More

Spring MVC - How to handle errors from a controller?

In a web application, it is very important to handle errors. Proper error handling would protect the application from several vulnerabilities, including Security Misconfiguration . In this post, you will see how you can handle exceptions that arise out of a Spring MVC based application. Read More