For decades, developers have struggled with optimizing persistence layer implementation in terms of storing business data, retrieving relevant data quickly, and most importantly simplifying data transaction logic regardless of programming languages. Fortunately, this challenge triggered the invention of Java ecosystems in which developers can imp...

In the video below, we take a closer look at ResultSet, Scrollable ResultSet, and Updatable ResultSet in JDBC with Examples. Let's get started!

tl;dr Call your member of Congress or Senator if you need help getting a passport appointment. When we renewed our kids' passports in October 2021, it only took a few weeks for their new ones to arrive in our mailbox. Trish and I sent our passports for renewal in late November, expecting a similar quick turnaround. I received mine back a coup...

With time and the evolution of technologies, building software has become faster but more complex in the same proportion. Therefore, tools that organize and mainly document software architecture decision-making are more than welcome. This article will introduce you to what architecture decision records (ADR) are. But let's take a step back and talk...

In this post, lets discuss an interesting memory problem we confronted in the production environment and how we went about solving it. This application would take traffic for a few hours after that it would become unresponsive. It wasnt clear what was causing the unresponsiveness in the application. Technology Stack This application was running on ...

In the video below, we take a closer look at stored procedures with input & output parameters in MySQL, and CallableStatement with Input&Output Params. Let's get started!

In the video below, we take a closer look at why we need JDBC transaction management with a sample program. Let's get started!

In the video below, we take a closer look at JDBC Statements with examples. Let's get started!

As developers, we are used to applying the @Transactional annotation provided by the Spring framework and rely on the mechanisms implemented by the framework for transaction management. But is this enough? Well, the answer is clear: No.

This lecture's objective is to make comparisons between points and weaknesses of Java frameworks that integrate with databases. On the one hand, the NoSQL MongoDB, Redis, Neo4J, and Cassandra, and on the other, the Java frameworks that integrate with them: Spring, Quarkus, Jakarta EE, Micronaut. The arena: the cloud! In this ring, the one who best ...

In the video below, we take a closer look at how to store images or retrieve images to/from a database table using JDBC Program? Let's get started!

Thread is the heart of the Java programming language. When we run a Hello World Java program, we run on the main thread. And then, we can definitely create threads easily as we need to compose our application code to be functional, responsive, and performant at the same time. Think about a web server; it simultaneously handles hundreds of requests ...

In the video below, we take a closer look at JDBC DriverManager and 4 types of JDBC drivers. Let's get started!

How does the JDBC Application work? What is JDBC Connection URL? Find out in this introductory video tutorial about JDBC and its architecture. Let's get started!

Java { T obj; Base(T obj) { this.obj = obj; } T getob() { return obj; } } class Sub extends Base { Sub(String str) { super(str); } String getob() { return obj; } }" data-lang="text/x-java"> class Base<T> { T obj; Base(T obj) { this.obj = obj; } T getob() { return obj; } } class Sub extends Base<String> { Sub(String s...

Last year was interesting a new LTS release, some amazing successes, but also a global vulnerability was discovered. In this article, we will try to guess and predict how the industry will face the new challenges, and what innovations and developments will affect it the most. General Trends 1. Migration From Java 8 A lot of apps still work on Jav...

The 2022 Jakarta EE Developer Survey, sponsored by the Jakarta EE Working Group, is now open. The survey will be open until May 6th. If you use or depend on Java/Jakarta EE (and that's most of us), it is very important that you fill out the survey before it closes. This is the fifth year of this survey. The purpose of the survey is to understand wh...

In the video below, we take a closer look at MySQL DB Installation: Using MySQL Workbench to connect to MySQL DB and how to install the Mysql 8 Server. Let's get started!

Areas of technology have been growing exponentially and bringing with them several opportunities and specializations. Among these thousands of options, we have software engineering and architecture. However, with so much content and easy access to happiness, what would be the best way to reach the goal that will achieve the desired satisfaction? In...

I've tried Go in the past, and the least I could say is that I was not enthusiastic about it. Chief among my griefs was how the language handled errors, or more precisely, what mechanism it provided developers with to manage them. In this post, I'd like to describe how a couple of popular languages cope with errors. A Time Before Our Time I could p...

In the video below, we take a closer look at JDBC Connection with examples. Let's get started!

Multithreading Is Most Complex And Biggest Part Of Java Multithreading chapters are the most difficult to understand and use in Java. Unfortunately, there are not that many sources where you can get all the answers. Meanwhile, concurrency knowledge is critically important. In this article, I explain the core aspects of multithreading that every Jav...

In the video below, we take a closer look at JDBC PreparedStatement with example and Statement vs PreparedStatement. Let's get started!

An exciting part of software development is what was unanimously considered good practice at one point in time can be more ambiguous years later. Or even plain wrong. However, you generally need to do it multiple times over time to realize it. Here are my top learnings from my experience in Java projects. Packaging by Layers When I started my devel...

The requirement was to hit an eternal web endpoint and fetch some data and apply some logic to it, but the external API was super slow and the response time grew linearly with the number of records fetched. This called for the need to parallelize the entire API call in chunks/pages and aggregate the data. Our synchronous feign client:

What is CORS (Cross-Origin Resource Sharing)? In this Spring Boot video tutorial, we take a closer look at the Cross-Origin AJAX HTTP Requests. Let's get started!

Race conditions can occur when a multithreaded application accesses a shared resource using over one thread. Unless we have guards in place, the result might depend on which thread "got there first". This is especially problematic when the state is changed externally. A race can cause more than just incorrect behavior. It can enable a security vuln...

In the video below, we take a closer look at the steps needed to connect to the database, the MySQL DB, or the oracle DB, and get information in JDBC. Let's get started!

Container platforms and edge computing continue to grow, powering major networks and applications across the globe, and Java technologies have evolved new features and improved performance to match steps with modern infrastructure. Java 17 (OpenJDK 17) was released recently (September 2021) with the following major features: Restore Always-Strict...

In the Spring Boot video tutorial below, we take a closer look at how to use Java Persistence Query Language(JPQL), RESTful Web Services. Let's get started!