Jakarta Servlets Quick Start Tutorial
Jakarta servlet quick start tutorial for beginners to get started building web applications using servlets technologies
Java Serialization fundamentals
In this post, I will introduce the fundamentals of serialization in Java that you need to know. The Serializable interface A class that doesn’t implement the Serializable interface cannot be serialized. In the previous post, you can see that the Car and Engine classes both implement Serializable. The Serializable interface is a marker interface. That … Read more
MongoDB Index Tutorial
MongoDB Index fundamentals If you have ever worked with any database (SQL or NoSQL), you probably know that the purpose of creating indexes is to speed up the queries at the cost of create/update/delete operations. MongoDB is no exception. MongoDB uses B-Tree as indexes’ data structure. This data structure offers fast queries. However, since the … Read more
MongoDB Aggregation Framework Cheat Sheet
Importing sample data This post is a quick introduction to the MongoDB Aggregation Framework. It’s a part of a mini-series called Mongo DB Cheatsheets To follow the tutorial, you need to import the following data: This sample is a list of 5 rich people from two families. The data contains their net worth and their … Read more
MongoDB Basic CRUD Cheat Sheet
If you have been doing software development for some time, you’d probably know what CRUD is. CRUD stands for CREATE-READ-UPDATE-DELETE. Those are the day to day task we do on databases, regardless of their types. Let’s get started by using a new database. As you may remember from the previous post, there is no “create” … Read more