Synchronous Request-Response over Kafka with Redis

Each message sent by a producer would include a unique correlation-id. Once the message is received and processed by the consumer, it will publish a response message back to Kafka with the same correlation-id.

Sep 7, 2023

Write Cleaner UI Tests with Page Object Model Pattern

Page Object Model can be used with any testing framework to write cleaner and simpler tests that are fast to write.

Aug 28, 2023

TDD example for REST API - CRUD

Extending our Movie example creating a REST API with TDD. Scenarios covered are Create, Read, Update and Delete.

Aug 17, 2023

TDD example on a backend - Upsert Method

Learn the foundation of TDD with a simple example explained in depth.

Aug 13, 2023

How to promote the habit of TDD within a Team

Promoting TDD within a team requires patience, consistent effort, and a focus on creating a positive and supportive environment for learning and improvement.

Aug 9, 2023

7 Tips to Optimize a Microservice for Data Migration Job

Aug 5, 2023

How we implemented OData for MongoDB and use it in OpenAPI

Implementing OData, Utilizing Specifications, and Enhancing API Flexibility.

Jul 11, 2023

Keep your business logic in the backend. Not frontend.

Making your application secure, high performance and maintanable.

Jul 6, 2023

Efficient Standups - Achieving Clarity through Walk-The-Board Standups

I believe walking the board is an important step towards facilitating Continuous Delivery. The standup format facilitates perfection in updates, focused on one card at a time which is closer to completion and takes less time to complete.

Jul 2, 2023

How we created a query and evaluation language similar to Google Sheets and Excel formulas

Using the best current programming language creation-tool.

Jun 15, 2023

Fix your security bugs even if it doesn’t affect you

May 31, 2023

Automate Validation of Your Configuration

With TDD, you don't find any logical bugs. The remaining types of bugs are data bugs and configuration bugs. This article discusses configuration validations to find and fix config bugs.

May 16, 2023

5 Simple Things to Improve Backend and Frontend Performance

Apr 11, 2023

Immutable Configuration and Infrastructure - What they are and Where Can You Build Your Own

Apr 7, 2023

GraphQL - Understanding its Advantages, Query Types, and Technical Functioning

Apr 6, 2023

Release and Development Snapshot Version Semantic Versioning with Maven

Mar 30, 2023

Manage Configuration Better By Avoiding Deleting or Making it Last Step

Mar 26, 2023

BDD vs UI/UX/TDD - Understanding the Key Differences for Customer-Centric Problem Solving

BDD focuses on solving customer problems, not implementation details like UI. Those are addressed in other activities like wireframing and TDD.

Mar 22, 2023

Implementing an OAuth Server Manually

Implementing OAuth server is easier than it looks and it saves money in the long run.

Mar 22, 2023

Have better variable and method names for technical layer by copying others

Mar 18, 2023

You are really doing BDD when

Mar 11, 2023

Separating Connectors and Service (Business Logic) - A Key Principle for Service Reusability

Separating connectors from business logic in a service-oriented architecture promotes reusability and single responsibility.

Mar 10, 2023

The only differences between external_apps and internal_features in a plugin architecture

Mar 3, 2023

Defining Scopes for your OAuth Service

Mar 3, 2023

Migrating DB smoothly with a migration script

Mar 3, 2023

RSA Algorithm

Feb 1, 2023

Start your project with Continuous Delivery till 'PROD'

How Zero-To-One is relevant in software development, why you should make Deployment&Delivery Pipeline first and how to make releases un-cool.

Jan 8, 2023

Template for Gherkin Specs

Jan 7, 2023

Separating_request,_entity_and_response

Jan 7, 2023

Observability For Developers

Fix bugs before your user reports

Jan 1, 2023

Code Review Checklist

Dec 31, 2022

My experience working with MongoDB

Dec 16, 2022

Adapting to Project Reactor / Webflux Mindset

Dec 15, 2022

Implementation GDPR - Download and Delete A Users Data in Microservice World

Dec 8, 2022

Why do microservices need an API client sdk for HTTP and Messaging?

Dec 3, 2022

The Prometheus Cheatsheet

The monitoring and time series database

Nov 23, 2022

Blind 75 - Reverse Bits

Get the last bit of value from the original. append to the reverse one. shift reverse one to the left. instead of adding, you can do `or` because after the shift last value will be 0. Imp - iterate 32 times only.

Nov 20, 2022

Blind 75 - Number of 1 Bits

Check if the last bit is 1 by (n&1). Do the right unsigned shift (logical shift >>>). Loop.

Nov 20, 2022

Blind 75 - Subtree of Another Tree

Check if root is same as subtree or root.left is same or root.right is same;

Nov 16, 2022

Blind 75 - Same Tree

Nov 16, 2022

Blind 75 - Reverse LinkedList

Similar to swapping two numbers. Start with prev as null and current and keep swapping next. Return prev because that's the last value.

Nov 16, 2022

Blind 75 - Merge Two-Sorted Lists

Iterate over both and store minimum one in current; Increment in the list from where minimum came. Once one of the lists is empty, empty the other one.

Nov 16, 2022

Blind 75 - Maximum Depth of Binary Tree

go to each depth, incrementing a depth counter by 1. return max of it.

Nov 16, 2022

Blind 75 - Linked List Cycle

Have a fast pointer and a slow pointer. fast increases by 2. slow increases by 1. if both become the same then the cycle exists. if fast one reaches end then no cycle exists.

Nov 16, 2022

Blind 75 - Invert Binary Tree

Swap left and right. Then repeat for those nodes.

Nov 16, 2022

How to develop a robust plugin architecture?

Nov 13, 2022

Blind 75 - Best Time To Buy And Sell Stock

Make sure the left pointer is always the lowest yet. Keep checking the difference between left and right. And return max.

Nov 13, 2022

JUnit Template For Tracking Bugs in Unit Tests

Nov 6, 2022

Blind 75 - Valid Parentheses

God-level solution - iterate.
If an opening bracket is found, put the closing bracket in a stack.
If the closing bracket is found, pop and check for equality.

Nov 6, 2022

Blind 75 - Valid Palindrome

Have 2 pointers. One at the start other at the end. Skip if `!Character.isLetterOrDigit` and compare with `Character.toLowerCase`

Nov 6, 2022

Blind 75 - Product of Array Except Self

Loop twice.
first right to left while multiplying.
Then second left to right while multiplying.
This can be done in a single array and one extra product variable

Nov 4, 2022

Blind 75 - Valid Anagrams

check if the length is the same.
find the difference in the count of letters in both numbers.
since there are only 26 letters, you can count in a single int array of 26.
index = char - 'a'

Oct 30, 2022

Blind 75 - Top K Frequent Elements - IMP

count all numbers. sort. and return top k. Use streams to make it cleaner. or use bucket sort.

Oct 30, 2022

Blind 75 - Group Anagram

compare the count of letters in each word and put group them in a map

Oct 30, 2022

Blind 75 - Contains Duplicate

Create a set and put items in one by one while checking if `num` is already there.

Oct 30, 2022

Blind 75 Two Sums

Make a map of item and index. Check if target - currentItem exists.

Oct 29, 2022

Why Framework Development Is Biggest Software Development Baton?

A Comparison between Application/Domain vs Framework Development

Oct 27, 2022

Increase collaboration for Developers

Oct 20, 2022

Understanding & Using HTTP Status Codes

Oct 15, 2022

First 2 Weeks of A New Project

Oct 15, 2022

3 Big Development Mistakes That Had Significant Costs Later

Oct 8, 2022

Microservice Chassis

Oct 2, 2022

How to test interfaces, abstract classes and design patterns?

Testing interfaces, abstract classes, and design patterns efficiently can be tricky since parents and children depend on each other.

We can write tests to eliminate these dependencies during the test time, making our tests very short and decoupled.

Sep 25, 2022

Pointers while integrating an external service

Sep 24, 2022

Be a more empathic developer

Sep 24, 2022

Increase collaboration by knowing whom to contact

Sep 21, 2022

Making Object Immutable for Concurrency

It's best to start with immutable objects and then modify them if needed.

Sep 18, 2022

Chaos Engineering

A powerful way to increase resilence of a system

Sep 11, 2022

How AutoConfiguration works in Spring Boot

Understanding and extending spring boot with custom AutoConfiguration

Sep 11, 2022

TDD over JSON

TDD Example that saved around 2 hours

Sep 8, 2022

A responseType field for all response classes

Practical Chaos Engineering Part 1

Sep 8, 2022

Feature Flagging

For Chaos Engineering and Continuous Delivery

Aug 28, 2022

Towards Data Driven Decisions

Aug 20, 2022

Developing Healthy Habits for Data-Driven Kanban Board

My experience implementing Kanban Principles.

Aug 20, 2022

Speed up Pipelines

Aug 20, 2022

Encapsulate Blocking Call the Reactor Way

Notes from Avoiding Reactor Meltdown

Aug 15, 2022

Ideal Development Workflow

From card picking to release

Aug 15, 2022

Mutation Testing

Aug 7, 2022

Pre-save Data Validation

Data validation at various stages minimizes bugs and unnecessary overhead, ensuring consistent and accurate information flow.

Aug 6, 2022

Tips on fixing and upgrading Maven Dependencies

Jul 29, 2022

When doing reactive programming, 'aim' to have streaming end-to-end

Jul 24, 2022

Writing better commits with Atomic Commits

Why small frequent commits leads to higher productivity

Jul 14, 2022

Always choose Reactive Programming

Multithreading programming has never been easier.

Jul 11, 2022

Writing cleaner logs by Disabling Stack Trace for Expected Response Exceptions

Jun 28, 2022

Writing cleaner tests with creative variable names

Creative variable names in tests can make them fun and interesting to read.

Jun 25, 2022

Rules of thumbs for Distributed System

Jun 25, 2022

Communication during conflict

Jun 19, 2022

Running and Being Effective during Meetings

Jun 1, 2022

The Gist of Behavior Driven Development - BDD

The process that keeps everyone in sync

May 23, 2022

The need for executable specifications

Ideas shape development; specs sync teams; Gherkin tests ensure precision.

May 21, 2022

Writing better commit with conventional commits

May 17, 2022

Some considerations when setting a new project

May 11, 2022

Writing better BDD specifications

May 10, 2022

Writing cleaner tests with Test Data Factories

Consolidating object creation, mock of methods and more.

May 3, 2022

Writing cleaner tests with Fluent Assertions

Fluent Assertions make tests highly readable and English-like, presenting a concise structure that simplifies comprehension

May 3, 2022

What to test to write after functional TDD

Apr 27, 2022

What and when to publish on message queue

Apr 27, 2022

Debugging Effectively

Apr 19, 2022

Solving a OptimisticLockingException During Upsert in MongoDB-Spring Webflux

Apr 16, 2022

Fixing Tools - IDE, Code Editors, Etc.

Apr 14, 2022

Writing Meaningful Log Messages

Apr 13, 2022

Avoid Mocks and understand the blurry lines between Unit and Integration Tests

The distinction between unit and integration tests blurs with embedded implementations, combining accuracy from both while overcoming limitations of traditional mocks and infra-heavy integration tests.

Apr 3, 2022

Whenever you encounter a bug

Mar 26, 2022

One Month Microservice

Mar 21, 2022

Thoughts & Notes on User Stories

Details about breaking user story added

Mar 21, 2022

Thinking and writing cleaner tests with method/when/should blocks

A template for thinking and creating understandable uniform tests

Mar 19, 2022

The Synchonized 3 Man Squad +/-1

Mar 17, 2022

Enforcing Architecture with Architecture Testing

Architecture is a crucial pillar of accelerating product delivery. It's hard to keep a team in sync with architecture over time.

Architectural testing can enforce architectural decisions as simple tests, dramatically reducing code review effort and extending code maintainability.

Mar 16, 2022

Clean code - Naming convension for design patterns

Making it easy for future-code readers to understand

Mar 12, 2022

Speeding Up Spring Boot/JUnit tests

From 8 minutes to less than 3 minutes.

Mar 7, 2022

My current approach to TDD

A step by step algorithm

Mar 4, 2022

Elements of Good REST API Design

Feb 19, 2022

Thoughts on Reading Documentation

Feb 16, 2022

Maintaining Documentation

Jan 25, 2022

Using StackOverflow as challenge log

Jan 15, 2022

Code Reviews and Pair Programming

Jan 7, 2022

Making TDD and Testing easier

Dec 24, 2021

Web Development Tip - Reverse Engineer by looking at DOM

Dec 22, 2021

Angular and React Comparison

Dec 4, 2021

Typescript

A much better alternative to Javascript

Nov 15, 2021

Keep most of your configuration within application not Jenkins

Sep 27, 2021

Separate Technical Code From Domain Code in both Frontend and Backend

Separate out technical code from business/domain logic for extreme reusability for code.

Sep 23, 2021

CSS Tips

Sep 13, 2021

Decentralization of High Tech

How abstraction, cost and education convert research fields to applied.

Aug 29, 2021

Complex Technologies are extension of Simple Ones

Aug 24, 2021

All Questions are False

Aug 16, 2021

Inversion

Probably the most powerful mental model

Aug 14, 2021

Tips for working with `package.json`

Aug 11, 2021

Solving N+1 Problem in Hibernate

Speed up fetching of child entities

Jul 15, 2021

My First Program

Jun 16, 2021

Art of Reducing Lines of Code in Java/Spring Boot

Jun 12, 2021

Faster SQL Batch Save in Spring Data JPA

Jun 12, 2021

Keeping database simple

Jun 5, 2021

Gist of DevOps

May 25, 2021

Applications of Recommender Systems

May 16, 2021

Gist of Cryptocurrencies

May 7, 2021

Compare yourself with who you were yesterday

May 4, 2021

Quick Refactoring Tips

May 4, 2021

There is no one size fits all

Choose the right tool for the job.

May 4, 2021

Develop your own opinions and reasonings

May 3, 2021

Decision Making Heuristics

May 3, 2021

Cases To Be Humble

May 3, 2021

Meditation is how you become peaceful all the time

Apr 28, 2021

You need time to think

Apr 7, 2021

Keeping Web Dev Code proper

Apr 1, 2021

User Experience

Mar 10, 2021

The philosophy behind testing in software and in general

Feb 28, 2021

How to recover from physical injuries faster

Feb 23, 2021

Ethical Capitalism

The Game Which Everyone Needs To Win

Feb 18, 2021

The Path / Ethics

Feb 4, 2021

Employee Ethics

Jan 23, 2021

Open Source Software (OSS)

Impact, Revenue and Deceptions.

Jan 22, 2021

Why Ethics?

Long term impacts

Jan 14, 2021

A replicable Development Environment with Docker + VS Code

Mitigating the most discoraging part of software development

Dec 25, 2020

Developer Productivity

Dec 22, 2020

How I learned basics of programming.

Dec 21, 2020

Research

Dec 18, 2020

Hurrying does not help.

Dec 17, 2020

Why Software Engineers Should Enter Other Fields.

Dec 13, 2020

Eventually Perfect Feature

Dec 8, 2020

Write Tests after Cleaning Code.

Nov 20, 2020

Plan quickly. Move fast. Break things.

Nov 3, 2020

Age is not a perfect measure of experience

Nov 3, 2020

Easing the process of DB versioning & migration tool adoption

Oct 31, 2020

First Hackathon

Oct 30, 2020

Software project never ends

Unless you stop

Oct 23, 2020

Office is just school for adults

Oct 21, 2020

Empowerment/Enabling

Oct 20, 2020

Definitions

The same word is different for different people

Oct 18, 2020

Who is your audience?

Rephrase: Who is your customer?

Oct 16, 2020

Correlation between Deep Learning Concepts and Philosophy

Oct 14, 2020

Cloud is Worth the Hype

Your robot on the internet

Oct 13, 2020

Communication Bottleneck in large organizations

and why communication policy is essential

Oct 10, 2020

Give credit where credit is due

Recognition

Oct 8, 2020

Reading Books

Sep 26, 2020

Who is a leader?

Sep 26, 2020

Just ask for it

Sep 12, 2020

The lifetime of 'Content' is getting smaller

Sep 10, 2020

Tips for coding on a slow computer

Sep 9, 2020

Opinions/Events are not black and white.

'Probably Right'

Sep 8, 2020

Probabilities

of "success"

Aug 29, 2020

If it's official, communicate via email

Non-repudiation

Aug 22, 2020

Businesses are for making money

Aug 20, 2020

Opportunity Cost

Aug 19, 2020

Don’t try to force a sale on people who are not your user base

Aug 19, 2020

Facade companies

Only for-money companies

Aug 19, 2020

Time tracking over programmers is counter-productive

Aug 18, 2020

When you are just starting out, don’t try to imitate the expert.

The illusion of perfect execution... every time.

Aug 17, 2020

Make your code configurable.

Things that should take 0 coding effort

Aug 17, 2020

Middleman

Aug 16, 2020

Support shows how much the company really care

Aug 15, 2020

Samurai to Modern Army in 10 years

Forced to upgrade

Aug 11, 2020

There is never enough automation

Aug 9, 2020

Copying features and products

An observation of different technology companies

Aug 5, 2020

Good products are built by teams not individuals

Usually

Jul 29, 2020

Writing process (July 2020 Edition)

This post is stupid but I was asked about it once.

Jul 27, 2020

Observe other people in action

Learning faster

Jul 25, 2020

If it is a core part of your business, don't outsource, build it yourself.

For producers

Jul 24, 2020

Just buy it. Don’t build it yourself.

For consumers

Jul 24, 2020

Environment Focused: For-Profit vs Non-Profits

Jul 18, 2020

Ideas

Jul 8, 2020

Baton Road

How humanity progresses.

Jul 5, 2020

ROI of Fun

Jul 1, 2020

Marketing Money

Draft version

Jun 30, 2020

Programming is now Configuring

beyond algorithms and data structures

Jun 29, 2020

User Interfaces

and design

Jun 23, 2020

Deciding to learn a {programming} topic

May 25, 2020

Agile and DevOps

May 21, 2020

Clean Code Resources and Tools

Constructing the simplest possible code

May 11, 2020

Math motivation

May 4, 2020

Advice for those who want to learn Deep Learning

or Machine Learning

May 2, 2020

Series Kaggle Getting Started

Baby steps towards competitions

Mar 30, 2020

Digit Recognition

MNIST: Kaggle Getting Started

Mar 30, 2020

Kaggle CLI QA: How to download a particular folder

Mar 10, 2020

Simple Hacks for increasing website load time

For those who don’t require Google level optimization

Feb 22, 2020

Leave it better than you found it

Atomic Habits applied to code. Thanks James Clear.

Jan 6, 2020

Exception handling

and Logging with style

Jan 6, 2020

Remove un-necessary code

You ain’t gonna need it

Jan 4, 2020

Avoid inventing algorithms and data structures

especially for maths

Dec 25, 2019

Avoid creating god classes and long methods

Minimalism

Dec 25, 2019

Make the database do the heavy lifting

You cannot compete with SQL

Dec 22, 2019

Leave Clues

Comments and Naming Conventions

Dec 20, 2019

Flat is better than nested

Leave when not okay

Dec 20, 2019

Clean Code

constructing the simplest possible code that would solve your problem resulting in an increase in productivity by producing higher quality in less time.

Dec 19, 2019

10 Google Collab Tips

Aug 18, 2019

How To Download Dataset From Kaggle

Using Kaggle CLI

Aug 10, 2019

Easy Jupyter Notebook Tips

Jul 29, 2019

Lessons Learned from my first Deep Learning contest

Game of Deep Learning was an image recognition challenge on AnalyticsVidya. The task was to classify 5 different types of Ships (Cargo, Military, Carrier, Cruise, and Tankers)

Jun 23, 2019

Copying Others vs Being Yourself

Oct 4, 2015