Test-driven development is a pretty awesome design process. And while building your code, you may want to mimic the logged-in user. In Spring Security, the logged-in user principal is stored inside the Authentication object. This Authentication object can be accessed from any part of your application using SecurityContextHolder. The SecurityContextHolder is a singleton … [Read more...] about How To Mock SecurityContextHolder in Spring Security using Mockito?
Load Spring Beans Based On Different Profiles Via XML
While working on a legacy project, sometimes it becomes so hard to find such small pieces of stuff. Recently I faced a similar problem where I had to load spring beans based on the loaded profiles respectively. With Spring Boot and annotation, it has become really easy. Just put the @Profile("profile1, profile2") and it works. Similarly, it is done in XML as well. All you … [Read more...] about Load Spring Beans Based On Different Profiles Via XML
How to Fix A Blunder and Get Squashed Commits Back (Git Undo)
There will be times when you will realize "Oh, no! What've I done?". That moment is a classic moment in every developer's life. Usually, it happens right after when you do something silly, and it costs you hours of re-work. We tend to become careless in tasks that we do on a regular basis. And one such task for me was Git Squash. I like my commits to be clean and … [Read more...] about How to Fix A Blunder and Get Squashed Commits Back (Git Undo)
Time Complexity Comparison Sheet Of Elementary Sorting Algorithms
It is always good to sharpen your blade from time to time. Data structures and algorithms is my sword. Recently, I visited all the elementary sorting algorithms. And it is always fun to understand the complexity and mindset behind it. This time I thought of writing a small program to run all the algorithms against a variable set of inputs to generate the time complexity … [Read more...] about Time Complexity Comparison Sheet Of Elementary Sorting Algorithms
Gitlab CI – SSH Into Virtual Private Server (VPS) Using Private Key From Gitlab CI Pipeline Job
Gitlab CI is a pain in the ass sometimes. It was a pain in my ass too. I was stuck for more than 2 hours trying to figure out how to SSH into my own server with my own private key. I tried so many things. And the shit becomes even more frustrating when the same piece of code works on your local but not on Gitlab CI. In my case, it went a step further to test my sanity. … [Read more...] about Gitlab CI – SSH Into Virtual Private Server (VPS) Using Private Key From Gitlab CI Pipeline Job
Long Polling Implementation With Java and Spring Boot
Long polling is a concept that was being used aggressively in the past. It was the technique that made web feel like real-time. I think a little history would help you to understand better. The Brief History Of Internet If you are old enough then you would know that web in its early days was very boring. And by boring I mean static, no moving parts. It simply … [Read more...] about Long Polling Implementation With Java and Spring Boot
Make Money During A Crisis
These are hard times. It has almost been a month now that I'm locked in my own house. Only stepping out for the essentials. Whenever we step outside, we make sure to wear masks and gloves. And after returning back home, clean our hands with soap and sanitizers. These times make you think about everything that we take for granted. I'm an IT engineer working from home … [Read more...] about Make Money During A Crisis
Why and How To Start Your Own Blog? (Less Than 10 Dollars)[With Images]
Do you own any public blog? Do you write often? Do you find peace when you sit down with your laptop and start pouring your thoughts on to the white canvas of your screen? Do you love telling stories? Do you enjoy when some stranger comments on your writing/article? Or you simply enjoy writing. If yes, then there is no reason why you shouldn't start your own … [Read more...] about Why and How To Start Your Own Blog? (Less Than 10 Dollars)[With Images]
Principles Of Microservices: How To Architect A Solution
Every enterprise has its own principles. Principles that takes it towards the goals. Principles that give birth to practices which are the underlying foundation for all the implementation. Similarly, Microservices has its own set of principles that helps its implementer to make the correct decision when given multiple options to choose from. Principles are like … [Read more...] about Principles Of Microservices: How To Architect A Solution
Why Would You Use Microservices (Advantages and Disadvantages)?
Microservice is a new hot trend in the Application Architecture Landscape. Everyone in the IT world is talking about microservices. Every enterprise is either working on a microservice or porting their existing monolith to Microservices. This term has become really popular that people outside of the organization are also using it to explain something or the other. In any … [Read more...] about Why Would You Use Microservices (Advantages and Disadvantages)?