December 09, 2022

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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
by Phee Jay

December 08, 2022

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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
by Phee Jay

February 11, 2019

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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
by Phee Jay

February 01, 2019

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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
by Phee Jay

January 28, 2019

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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
by Phee Jay

January 25, 2019

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Java - How to find the IP Address of a host in Java ?

In Java, if you are looking to resolve an IP Address from the given hostname, then you can leverage the capabilities provided by InetAddress . It belongs to the "java.net" package and provides various utilities related to resolving addresses and IPs. Read More
by Phee Jay

September 02, 2017

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Spring - Initializing a Spring Bean

In Spring, it's often necessary to run custom code during a bean's initialization—for example, to validate mandatory properties or establish initial connections. Spring offers several mechanisms to initialize beans after they’ve been injected with their properties. Read More
by Phee Jay