How to Gather Performance Metrics in Spring Batch
This post will look at two ways to extract performance metrics out of a Spring Batch Job using Dropwizard Metrics.
Johan Zietsman
development
Johan Zietsman
How To Reverse Indent Files With RxJS
A Basic introduction to reactive programming using RxJS 5.0 by building a node script that reverse indents files.
Johan Zietsman
How To Build a Chat App Using WebFlux, WebSockets & React
WebFlux is one of the standout features of Spring 5.0, which is a functional web framework alternative to Spring-MVC, built on top of Reactive principles. This post will look at how to build a basic chat application using WebFlux on the server to handle incoming WebSockets and React on the front end…
Johan Zietsman
Tech Interview CheatSheet - Trees
Overview of Trees, including depth first search (DFS), breadth first search (BFS), Binary Search Trees & Self Balancing Trees.
Johan Zietsman
Tech Interview CheatSheet - Maps & Hashing
In Part 1 of this series I looked at common search and sorting algorithms used on Lists. This post will look at Hash functions and how they are applied to Sets and Maps to offer constant time lookup performance. Hash Functions A Hash function takes a value and produces a number that is often used as…
Johan Zietsman
Tech Interview CheatSheet - Lists, Search & Sort
An overview of Binary Search algorithms, including Bubble, Merge and Quick Sort.
Johan Zietsman