Posts by Year

Gcp Logs

less than 1 minute read

Testing Estimations

less than 1 minute read

Unit test Estimation

Git Revert

less than 1 minute read

git revert is useful when you want to undo the changes made by a specific commit without rewriting history

Git Cherry Pick

less than 1 minute read

Git cherry-pick is a command used to apply a specific commit from one branch to another. It’s useful when you want to pick only certain commits from one bra...

ssl Security Certificate Issue

1 minute read

Solution for the issue on Local microservice testing Caused by: javax.net.ssl.SSLHandshakeException: PKIX path building failed: sun.security.provider.certpat...

Brave/Chrome Devtools

less than 1 minute read

Hide the Overview tab to reclaim some space

Java Compilation

less than 1 minute read

```shell git clone https://github.com/AdoptOpenJDK/jitwatch.git

JVM Arguments

less than 1 minute read

Compilation

Spring Actuator

1 minute read

Actuator Settings

Eclipse Memory Analyzer Tool (MAT)

less than 1 minute read

Index

Spring Scheduler

less than 1 minute read

Scheduling with Cron

Caching with Redis

1 minute read

Index

Rest Template

1 minute read

Index

Java Mission Control - JMC

less than 1 minute read

Index

Java Microbenchmark Harness - JMH

less than 1 minute read

Index

Garbage Collections

1 minute read

Index

Escaping references

1 minute read

Index

Java Memory

3 minute read

Index

JVM and Compilation process

8 minute read

Index

Security

less than 1 minute read

Index

Rate Limiting

1 minute read

Index

Database Replication & Migrations

2 minute read

Index

Caches

3 minute read

Index

Transaction Isolation Levels

4 minute read

Index

Data Consistency Levels

2 minute read

Index

Databases

1 minute read

Index

Hardware Overview

less than 1 minute read

Index

Back of the envelop estimations

1 minute read

Index

Scaling Vertical vs Horizontal

less than 1 minute read

Vertical Scaling(Scaling Up) - Buying a bigger machine Horizontal Scaling (Scaling Out) - Adding more machines

Computer Networks

3 minute read

7 Layers of OSI

Git Hooks

less than 1 minute read

Index

LaTeX in Markdown

1 minute read

Index

Drills

10 minute read

Index

Math

2 minute read

Index

Arrays, List and Collections Class

2 minute read

Index

Double Utility Class

less than 1 minute read

Index

Optional As a Design Pattern

1 minute read

Index

Integer & Long

1 minute read

Index

Bitwise Operators

10 minute read

Index

Exceptions in Java

4 minute read

Index

Gradle

less than 1 minute read

Index

Sonarcube on local

less than 1 minute read

Index

Power Mock Tests

less than 1 minute read

Index

Character Utility Class

1 minute read

Index

Mockito Junit Tests

6 minute read

Index

Git - Cleanup Maintenance

less than 1 minute read

Index

Git config- Multi Repo projects

3 minute read

Index

IntelliJ Idea Debug

less than 1 minute read

Index

Git Rebase Squash and Fast forward

1 minute read

Index To combine multiple commits (squash) from the feature branch into one while merging into the develop branch, an squash merge or interactive...

Git Reset - Revert

1 minute read

Index

Laziness and Functional Programming

less than 1 minute read

As Polymorphism is to object-oriented Programming Lazy Evaluation is to functional programming

Singleton Design Pattern

1 minute read

Index

Factory Design Pattern

less than 1 minute read

Index

Builder Design Pattern

less than 1 minute read

Index

Composition

less than 1 minute read

Index

Optional As a Design Pattern

less than 1 minute read

Index

Strategy Pattern

less than 1 minute read

Index

Iterator As a Design Pattern

2 minute read

Index

Functional Programming

1 minute read

Index

Kafka Essentials

2 minute read

Kafka Terminology Producer: A producer is a client that sends messages to the Kafka server to the specified topic. Consumer: Consumers are the recipients who...

Switch

1 minute read

Index

Java Tests

4 minute read

Index

Java Systems Stats

less than 1 minute read

Index Stats Stats

Asynchronous Programming

6 minute read

Index

Docker commands

4 minute read

Index

Exception Handling in Spring

4 minute read

Index

GET REST Calls

less than 1 minute read

Index

DELETE REST Calls

less than 1 minute read

Index

Swagger Documentations

less than 1 minute read

Index

Spring Validations

4 minute read

Index

Spring Path variable & Request Parameter

1 minute read

Path variable

SpringBoot Reference

8 minute read

Index

POST API

1 minute read

Index

Depth First Search (DFS) Traversal

less than 1 minute read

Index

Breadth First Search (BFS) Traversal

less than 1 minute read

Index

Oracle DB

1 minute read

Index

Materialized views

1 minute read

Index

Savepoint

1 minute read

Index

Triggers

1 minute read

In Oracle Database, there are two main types of triggers:

Oracle PL/SQL

4 minute read

Index

SQL Window Aggregate Functions

less than 1 minute read

Window or Aggregate function

SQL Window Functions

less than 1 minute read

WHAT IS A FUNCTION? A named block of code which returns same value when it is called, using the same argument. – WINDOW Functions / Analytic Functions

SQL Subqueries

less than 1 minute read

Types of subqueries:

SQL Joins

1 minute read

Transactional Tables

less than 1 minute read

History Tables

SQL Basics

less than 1 minute read

Default schemas Postgres - public SQL Server - dbo MySQL - Oracle - sys

SQL Nornmalization

less than 1 minute read

MacBook : Configuring shell profile

3 minute read

On Mac with iTerm2 and ZSH

dBeaver for SQL Development

less than 1 minute read

PDF Reference

Importing MySql data dump from a sql file

less than 1 minute read

Import MySql data dump from dump file

javascript

less than 1 minute read

Variable

Python Concepts

less than 1 minute read

Index

OpenAi and Prompt Engineering

less than 1 minute read

Index

Trading

2 minute read

Technical analysis masterclass

MapStruct Mapper

3 minute read

Index

Jackson Mapper

3 minute read

Index

Idempotence & HTTP Methods - Designing RESTful URI’s

3 minute read

Index

Spring Beans

1 minute read

Index

Wrapper Classes - Parse & ValueOf

1 minute read

Index

Parallel Streams

3 minute read

Index

Collectors

5 minute read

Index

Design Principles

less than 1 minute read

Index

SOLID Principles

3 minute read

Index

Higher Order Functions

less than 1 minute read

Index

Supplier Functional Interface

less than 1 minute read

Supplier public interface Supplier<T> { T get(); }

Predicate Functional Interface

less than 1 minute read

java.util.function.Predicate represents a simple function that takes a single value as parameter, and returns true or false. Predicate uses a Lambda that re...

Generics

less than 1 minute read

With the help of generics, the possibles runtime exceptions can be converted to compile time exception.

Function Functional Interface

less than 1 minute read

Function

Consumer Functional Interface

less than 1 minute read

Consumer (used with forEach) takes generified argument and returns nothing

Method Reference

2 minute read

Index

Sorting

1 minute read

Index

Gradle - build & tool

less than 1 minute read

Gradle build tree

Git Log

less than 1 minute read

Index

Java Mailing API

1 minute read

Index

Google BigQuery

less than 1 minute read

Once the data is received, convert (serialize) the results data into DTO, using defauklt jackson mapper

Google TimeZone API

less than 1 minute read

Find Latitude and Longitude

MacBook : Brew Package Migration

1 minute read

Index

Google GeoCoding API

less than 1 minute read

Find Latitude and Longitude

Polymorphism

3 minute read

Overriding in Inheritance

Static

less than 1 minute read

Static belong to class NOT to the instance (object)

Generics

4 minute read

With the help of Generics, the possible runtime Exceptions can be converted to Compile time Exceptions

Lambda Expressions & Functional Interface

2 minute read

Index

Static Factory Methods

less than 1 minute read

What is Static Factory Method?

Reactive Programming

1 minute read

Index

Race Condition and Crtitcal Section

less than 1 minute read

As a general rule, you shouldn’t expect to be creating your own interfaces, just to work with lambdas. T

Java IO

less than 1 minute read

Class with InputStream or OutputStream (in its name) -> for BinaryData

Functional Concepts

5 minute read

Functional Concepts Agenda

Serialization

1 minute read

Index

Java Streams

2 minute read

Java Streams

Java Stream Issues

less than 1 minute read

Object Creation & Assignment In Streams

Null pointer Exceptions

less than 1 minute read

Handling Null pointer Exceptions

Default method in Interface

less than 1 minute read

Index

Java ZonedDate Time

4 minute read

Index

Boolean

less than 1 minute read

Index

Terminal Commands

5 minute read

Index

Hibernate

less than 1 minute read

Index

Dependency Injection

2 minute read

Index

Spring Data JPA & CRUD - GET PUT POST DELETE

2 minute read

Index

Spring Transactions

5 minute read

Index

Array Syntax

1 minute read

Index

Git Config - global

less than 1 minute read

Index

षोडशः संस्कार (The 16 Sanskars)

less than 1 minute read

The 16 milestones of Life

Gardening

less than 1 minute read

Jiffy Natural & Organic Seed Starter Mix, 12

Sony A7iii Camera Settings

less than 1 minute read

F-Stops

Sony A7iii Camera Panning

less than 1 minute read

Camera Panning

Large Files on Github

less than 1 minute read

Github allows max file size of 25 MB so

Ubuntu Server Installation

less than 1 minute read

Ubuntu Server Installation

MacBook : Useful Settings

1 minute read

Necessasary UI Settings All the commands can be located here. Show Full directory path on Finder:

Hosting personal website on home router

1 minute read

Port Forwarding on Home Router

Atom

less than 1 minute read

Atom

Markdown Reference

3 minute read

Index

Useful MS Excel Tools

less than 1 minute read

Contents

Strings

3 minute read

Index

Sets

less than 1 minute read

Index

Iterator

less than 1 minute read

Index

Heaps

less than 1 minute read

Index

Graphs

less than 1 minute read

Index

IntelliJ Idea Shortcuts

7 minute read

Index

Iterm 2 Shortcuts

less than 1 minute read

Terminal Productivity - iTerm-2

Syntax Reference

1 minute read

Index

Coding Hints

3 minute read

Index

Virtual Threads in Java 21

2 minute read

History of multithreads

Optional Use cases

2 minute read

Index

MySql to Spanner Migration using HarbourBridge

1 minute read

Import MySql data dump into Spanner using HarbourBridge

Searching

less than 1 minute read

Searching

Spanner Database

1 minute read

For making full use of the free tier, The Database and it’s corrosponding instance need to be up and running only while development and testing. Always delet...

Handling Multiple GCP Configs

1 minute read

Create Multiple config for GCP Accounts

Sublime Settings

1 minute read

Index

Google Cloud Platform

1 minute read

Index

Mahabharat Family tree

less than 1 minute read

The Family tree

MacBook : Configuring a new MacBook for Dev Productivity

1 minute read

Contents

IntelliJ Idea settings

1 minute read

Index

MacBook : iTerm2 Set up with zsh on Mac

1 minute read

Index

Useful git commands

3 minute read

Index

Submodules & Detached Head Problem

less than 1 minute read

While using Git Submodules, after cloning a submodule, the projects are in detached mode.

Code Quality

less than 1 minute read

Readability Maintainability Testability

Designing a microservice

less than 1 minute read

All Microservices Projects are hosted in

Spring Config Client

less than 1 minute read

Test Microservice for Spring Cloud Config. This is a client Application

Zipkin Distributed Tracing Server

less than 1 minute read

Zipkin Distributed Tracing Server

Spring Cloud Sleuth

less than 1 minute read

Assigning Trace id to all the Microservices

Java Interview Questions

15 minute read

Java Interview Questions

Java Collection Class

less than 1 minute read

Index

Maps

2 minute read

Index

Array Problems

1 minute read

Index

Upgrading the Macbook Pro - Model A1278

1 minute read

Index

SQL Revisions

4 minute read

Index

Linux Files

3 minute read

Index

Stacks

less than 1 minute read

Index

Queue

less than 1 minute read

Index

Trees

1 minute read

Index

Linked List

1 minute read

Index

Jekyll Blog and Free Hosting on GitHub!

less than 1 minute read

Index