2021-07-19 04:00
In a previous post I had gone over how a “Try” type can be created in Kotlin from scratch to handle exceptions in a functional way. There is no need however to create such a type… Read More
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2021-07-18 12:15
In Java, we often have framework support for importing settings from the file system of our application. If we’re lucky, and we often are, these settings can be customised and overridd… Read More
2021-07-17 12:15
When our software outputs JSON, it can be hard to test. Consider this code: 1 2 assertThat(someJson) .isEqualTo(expectedJson); Assuming the rendering of the resulting json… Read More
2021-07-16 04:00
The previous article demonstrated how to implement cross-cluster Anthos Service Mesh (ASM) in a single network. In this article we will illustrate the mesh service communication using differ… Read More
2021-07-15 04:00
One of the advanced mesh constructs or topologies are multi mesh or cross mesh designs that aids in inter-cluster communication. With such a topology, each cluster will implement its own mes… Read More
2021-07-14 04:00
With time progressing, technology is transforming at a lightning speed to make the software development process much simpler, faster, qualitative and convenient. Technologies like machine le… Read More
2021-07-13 04:00
Selenium is the name that comes on top of our minds whenever we talk about automation testing. It has been the most preferred automation testing tool, loved by testers and developers worldwi… Read More
2021-07-12 06:00
18 Courses from Top Cyber Security Instructors to Take Your Ethical Hacking Expertise to the Next Level — From Python 3 to Complete NMAP Hey fellow geeks, This week, on our JCG Deals s… Read More
2021-07-12 04:00
In our previous article from this series shared a look at the logical common architectural elements found in a cloud adoption solution for retail organisations. The process wa… Read More
2021-07-11 12:15
In this post we will learn how we can use Kotlin extension functions to provide a simple and elegant type conversion mechanism. Maybe you have used Apache Sling before. In this case, you are… Read More
2021-07-10 12:15
If you’ve worked with Go before, you’ve probably seen this runtime error. 1 panic: runtime error: invalid memory address or nil pointer dereference The current solution is checki… Read More
2021-07-09 04:00
Hello. In this tutorial, we will create a simple node.js web server and handle the HTTP requests. The node.js framework is commonly used to create server-based applications which are further… Read More
2021-07-08 04:00
In my career I have noticed that often organizations are reluctant on providing Engineering teams with licenses for software to draw diagrams. In the best case scenarios MS Visio is us… Read More
2021-07-07 04:00
A quick guide to java 8 streams filtering concept with multiple conditions. This demonstrates how to use filter() in a more advanced way with examples 1. Overview In this tutorial, We’… Read More
2021-07-06 04:00
A quick guide to convert an array to iterable in java using Stream api with examples programs in two ways. 1. Overview In this tutorial, We will learn how to convert java array to iterable i… Read More
2021-07-05 06:00
Kickstart Your Lucrative Coding Career with 119 Hours of Content on HTML, Data Science, Different Programming Languages & More! Hey fellow geeks, This week, on our JCG Deals store, we ha… Read More
2021-07-05 04:00
A quick guide to convert List to String in java using different methods and apache commons api with examples. 1. Overview In this tutorial, we will learn how to convert List to String in jav… Read More
2021-07-04 12:15
Several of my clients struggle with their deadlines. One of them, Brad, quoted Douglas Adams to me and frowned: “I love deadlines. I love the whooshing noise they make as they go by.&r&hell…Read More
2021-07-03 12:15
Today I want to introduce TagUI, an RPA (Robotic Process Automation) Open Source tool I am using to automate test scenarios for web applications. It is developed and maintaine… Read More
2021-07-02 04:00
In our previous article from this series we introduced a use case around cloud adoption for retail stores. The process was laid out how we’ve approached the use case an… Read More
2021-07-01 04:00
In any rest-api based application it’s a matter of time when there is going to be the need to intercept the requests towards the application and execute more than one actions. If those… Read More
2021-06-30 07:00
Previously we had an introduction on the BigQuery Storage API and we proceeded reading data using the Arrow format. In this tutorial we shall read Data using the Avro format. What applied on… Read More
2021-06-30 04:00
We’ve all used dozens of serialization frameworks – for JSON, XML, binary, and ORMs (which are effectively serialization frameworks for relational databases). And there’s a… Read More
2021-06-29 04:00
Hello! In this tutorial, we will learn about Express.js File Upload. More specifically, we will handle the file upload in the node.js application. To perform the file upload we will use a si… Read More
2021-06-28 06:00
Be an In-Demand, Tech Professional in the Ever-Growing IT Field with 41 Hours of Content on IoT, Java, Robotics, Data Science & More Hey fellow geeks, This week, on our JCG Deals store… Read More
2021-06-28 04:00
In an earlier post about idempotency and safety of HTTP methods we learned that idempotency is a positive API feature. It helps making an API more fault-tolerant as a client can safely retry… Read More
2021-06-27 12:15
Many managers and teams talk about “average” durations for work. On average, how long does it take a team to finish a certain kind of work? However, average doesn’t quite e… Read More
2021-06-26 12:15
This article launches a new series exploring the cloud adoption architecture. It’s focusing on presenting access to ways of mapping successful implementations for specific use cases. I… Read More
2021-06-25 04:00
Previously we had an introduction on the BigQuery Storage API. As explained the storage API of BigQuery supports two formats. For this tutorial we will choose the Arrow Format. First let&rsq&hell…Read More
2021-06-24 04:00
The Quarkus dev mode increases our development productivity and especially reduces the turnaround times how long it takes to get test feedback. For Quarkus projects, this is a huge benefit… Read More
2021-06-23 07:00
1. Introduction This series of articles shows how one can process real time stream data using a number of technologies. The input data stream is flight data arriving real-time from a sensor… Read More
2021-06-23 04:00
As I mentioned in Hashtag Jakarta EE #76, the Jakarta EE Platform project is in the process of determining the Java SE requirements for Jakarta EE 10. In this post, I try to shed some light… Read More
2021-06-22 04:00
Hello in this tutorial, we will understand Cookies and implement them in an Express.js application. 1. Introduction Cookies are a piece of any information sent from the server and are stored… Read More
2021-06-21 06:00
Study Up On Today’s Top Cloud Deployment Technologies & Prepare to Earn Important Certifications Hey fellow geeks, This week, on our JCG Deals store, we have another extreme offer… Read More
2021-06-21 04:00
Hello in this tutorial, we will build a REST API in a Node.js environment running on an Express.js server. 1. Introduction RESTful API stands for the standard web service interface used by t… Read More
2021-06-20 12:15
Did you notice? Last week, we migrated the entire www.optaplanner.org website (1399 files) to build with Java and Maven, instead of Ruby and Rake. On the face of it, nothing changed. But in… Read More
2021-06-19 12:15
A quick guide to understand primitive int representation of Stream as interface IntStream to support integer operations and with the useful examples. 1. Overview In this tutorial, We’l… Read More
2021-06-18 04:00
A quick guide on how to convert the file contents to String using Java Files api and with example programs. 1. Overview In this tutorial, you’ll learn how to convert File contents to S… Read More
2021-06-17 04:00
BigQuery provides us with the Storage API for fast access using an rpc-based protocal. With this option you can receive the data in a binary serialized format. The alternative ways to retrie… Read More
2021-06-16 04:00
I’ve been updating some training materials recently, and thinking about better ways of teaching and talking about JPA. One of the things I’ve been thinking about is how we have t… Read More
2021-06-15 04:00
Hello! In this tutorial, we will learn how to Sequelize ORM in Node.js Application. More specifically, we will build a RESTful application in a Node.js environment running on an Express.js s… Read More
2021-06-14 06:00
42 Hours of Prep Content to Fast Track Your Microsoft Azure Professional Career from Top-Rated Instructors Scott Duffy & Anand Nednu Hey fellow geeks, This week, on our JCG Deals store… Read More
2021-06-14 04:00
Hello! In this tutorial, we will explain the Express.js sessions. We will understand how to manage sessions in a Node.js application. HTTP is a stateless protocol and to manage sessions in a… Read More
2021-06-13 12:15
A quick guide to explore the Spark RDD reduce() method in java programming to find sum, min and max values from the data set. 1. Overview In this tutorial, we will learn how to use the Spark… Read More
2021-06-12 12:15
This article will focus on one of the advanced service mesh topology called cross-cluster mesh model. Often the terms used are multi-cluster and cross-cluster where multi-cluster denotes a s… Read More
2021-06-11 04:00
Microservices architecture helps in building an application as a suite of multiple fine-grained smaller services. Each of these services run in its own process and are independently deployab… Read More
2021-06-10 04:00
In today’s highly competitive world, software development and automation play a significant role in creating robust software applications for businesses. Additionally, emerging technol… Read More
2021-06-09 04:00
In our previous article from this series shared a look at the logical common architectural elements found in a retail data framework solution for retail organisations. The pro… Read More
2021-06-08 07:00
a.k.a. “How do I subclass a list element declared in my interface?” As covered by the rather awesome Ram on Baeldung, the Liskov substitution principle is important and is enforc… Read More
2021-06-08 04:00
Selenium has gone through a tremendous evolution since its introduction and that’s the reason today it is the most popular and powerful automation testing tools. The newly released Sel… Read More
2021-06-07 06:00
Hey fellow geeks, This week, on our JCG Deals store, we have another extreme offer. We are offering a massive 99% off on Pay What You Want: The 2021 Superstar Web Development & Design Bu… Read More
2021-06-07 04:00
I explained in Leadership Tip #8 that measuring happiness was a lost cause because happiness is a function of more than just work. I suggested we measure satisfaction. And I didn’t tel… Read More
2021-06-06 12:15
In our previous article from this series we introduced a use case around the data framework for retail stores. The process was laid out how we’ve approached the us… Read More
2021-06-05 12:15
In a previous blog post I went over the basics of Json Patch and Json Merge Patch and how a code that performs these operations looks like. In this post I will go over the details of how to… Read More
2021-06-04 04:00
For API users it is quite important an API provides useful error messages. Otherwise, it can be hard to figure out why things do not work. Debugging what’s wrong can quickly become a l… Read More
2021-06-03 04:00
Technology is constantly evolving, and to beat the competition, the teams must push the software updates to the production environment as quickly as possible. To get a faster response to suc… Read More
2021-06-02 04:00
These days, there is a lot of excitement around 12-factor apps, microservices, and service mesh, but not so much around cloud-native data. The number of conference talks, blog posts, best pr… Read More
2021-06-01 07:00
Previously we wrote Arrow Data to a Stream. Now we shall read those data from a stream. Just like on the previous blog the we shall implement the Closeable interface. This is needed to close… Read More
2021-06-01 04:00
In the first part we thoroughly went through the massive amount of features delivered in scope of JDK-9. Nevertheless, this release was always considered as being transitional, with little o… Read More
2021-05-31 06:00
Make Your Mac Unstoppable! Get 5 Award-Winning Apps for Contact Management, Cyber Security, PDF Navigation, Productivity & More Hey fellow geeks, This week, on our JCG Deals store, we ha… Read More
2021-05-31 04:00
Another post about Lightweight Config, a library I’ve recently built from the ground up, after creating various versions of it in previous projects. Where previously, I’d tried t… Read More
2021-05-30 12:15
Many frameworks provide support for pagination of results that come from a database. However, sometimes we need to implement this fairly common pattern. Using TDD construct the pagination lo… Read More
2021-05-29 12:15
Growing up in the twentieth century, I’m sure we have all witnessed our parents and grandparents taking us to do the daily chores. Be it going to the same barber to cut our hair, or go… Read More
2021-05-28 04:00
This article launches a new series exploring a retail architecture blueprint. It’s focusing on presenting access to ways of mapping successful implementations for specific use cases. I… Read More
2021-05-27 07:00
The wish to fulfil certain system quality attributes lead us to choose microservice architectures, which by their very nature are distributed, meaning that calls between the s… Read More
2021-05-27 04:00
Join us in celebrating a new release of Jakarta EE! The Jakarta EE Working Group Releases Jakarta EE 9.1 as Industry Continues to Embrace Open Source Enterprise Java! Jakarta EE 9.1 adds sup… Read More
2021-05-26 07:00
Hello in this tutorial, we will understand how to serve static files on an Express.js server. There are two ways to serve static files in express: Serving a single file through the HTTP resp… Read More
2021-05-26 04:00
Hello in this tutorial, we will understand how to handle routing in a Node.js application running on an Express.js server. 1. Introduction To set up Node.js on windows you will need to downl… Read More
2021-05-25 04:03
Hello, This time a new release of JMetro. This new version features bug fixes, tweaks to visual styles, structural changes and changes to the way JMetro is distributed and published. Read on… Read More
2021-05-24 06:00
Hey fellow geeks, This week, on our JCG Deals store, we have another extreme offer. We are offering a massive 95% off on The Complete JavaScript eBook Bundle. Get it now with only $19,99 ins… Read More
2021-05-24 04:00
In our previous article from this series shared a look at the logical common architectural elements found in a real-time stock control solution for retail organisations. The p… Read More
2021-05-23 12:15
Previously we went to create some schemas on Arrow. On this blog we will have a look on writing through streaming API. Based on the previous post’s Schema we shall create a DTO f… Read More
2021-05-22 12:15
Arrow is memory format for flat and hierarchical data. It is a popular format used by various big data tools, among them BigQuery. One of the benefits that Arrow brings is that the format of… Read More
2021-05-21 04:00
If I look at recent projects, I’ve used various forms of Git, a few variations on Jenkins, and the leading repository services – Artifactory and Nexus. In general, most of my rec… Read More
2021-05-20 04:00
Shall we use Jenkins or CodeBuild? The eternal question. On the one hand, Jenkins allows you define builds and pipelines inside your repository, on the other hand, a Jenkins server is someth… Read More
2021-05-19 07:00
This post is about some of the struggles I’ve had while dealing with configuring HTTP(s) proxy for docker daemon process. I note it here for myself as well as others who might ru… Read More
2021-05-19 04:00
Apache Ant 1.10.10 got released around a month back. Among the usual bug fixes, we added a new enhancement for the “junitlauncher” task. For those of you who haven’t used o… Read More
2021-05-18 07:00
For a majority of the population, WordPress is the more relatable word. Thanks to the ease of use and the minimal learning curve it offers to its users in setting up blogs, websites, eCommer… Read More
2021-05-18 04:00
As I move between clients, I’m building a playbook of tools I like to have/make in order to help manage the environment. While I remember how a tool needs to be made, each environment… Read More
2021-05-17 06:00
Hey fellow geeks, This week, on our JCG Deals store, we have another extreme offer.We are offering a massive 94% off on Whizlabs Online Certifications: Lifetime Membership. Get it now with o… Read More
2021-05-17 04:00
In our previous article from this series we introduced a use case around real-time stock control for retail stores. The process was laid out how we’ve approached the use… Read More
2021-05-16 12:15
The first word that comes into our mind when you say software development is ‘Java’. It has had such an impact on the modern tech world that practically revolves around it. It is… Read More
2021-05-15 04:00
Introduction JUnit 5 has a lot of underutilized features. Developers have learned how to use JUnit 4, and they utilize the same feature set when using JUnit5. The sexy DisplayName annotation… Read More
2021-05-14 04:00
Syslog. You’ve probably heard about that, especially if you are into monitoring or security. Syslog is perceived to be the common, unified way that systems can send logs to other syste… Read More
2021-05-13 04:01
This article launches a new series exploring a retail architecture blueprint. It’s focusing on presenting access to ways of mapping successful implementations for specific use cases. I… Read More
2021-05-12 07:00
Json Patch and Json Merge Patch both do one job well – a way to represent a change to a source json structure. Json Patch does it as a series of operations which tran… Read More
2021-05-12 04:00
Are you working for an enterprise that utilizes outdated software? Old software, or legacy systems, pose threats to businesses looking to streamline processes, cut costs, and stay innovative… Read More
2021-05-11 07:00
Problem Default value of retention.ms attribute on kafka topis is set to 7 days but data still persist for pre 7 days in topic. Version of kafka : 2.1.11 An interesting problem was that even… Read More
2021-05-11 04:00
Imagine going down to your local milkshake bar and signing a contract with the owner so that you could purchase bespoke drinks at a set price. Let’s say you agreed on fresh milk with 3… Read More
2021-05-10 06:00
Develop Expertise on the Leading Programming Language & Create Actual Programs with 10 Hours of Content on Java Fundamentals, Collections, Classes, and More Hey fellow geeks, This week… Read More
2021-05-10 04:00
Bulk (or batch) operations are used to perform an action on more than one resource in single request. This can help reduce networking overhead. For network performance it is usually better t… Read More
2021-05-09 12:15
Selenium is considered one of the best testing tools for automating web applications. It is a powerful tool with built-in features to support all types of actions related to the keyboard and… Read More
2021-05-07 04:00
In our previous article from this series shared a look at the logical common architectural elements found in a store health and safety solution for retail organisations. The p… Read More
2021-05-06 04:00
Developers are constantly discussing and even fighting about text editors and IDEs. Which one is better, why is it better, what’s the philosophy behind one or the other, which one make… Read More
2021-05-05 04:00
It’s been a while since I’ve blogged, and just like other posts in the past, this one is meant as a way to dig into something and for me to catalog my own thoughts for later. Whi… Read More
2021-05-04 04:00
Your team finished something difficult. They released it. You celebrated the team’s accomplishment with the team. Let’s assume your name is Jim. Now, you’re in a senior man… Read More
2021-05-03 06:04
Deliver Smooth, Secure, & Configured Process to Users and Organizations with 17 Hands-On Courses on the Top 3 Cloud Service Platforms Hey fellow geeks, This week, on our JCG Deals store… Read More
2021-05-03 04:00
A brief intro to custom thread pools and their use in Java 8 parallel streams. Examples on how to use custom pools with the Parallel streams API which avoids common thread pool usage. 1. Int… Read More
2021-05-02 04:00
A guide to group by two or more fields in java 8 streams api. Examples to grouping List by two fields. 1. Overview In this tutorial, We will learn how to group by multiple fields in java 8 u… Read More
2021-05-01 04:00
A quick guide on how to read the file in older java and new JDK 8 version with example programs. 1. Overview In this tutorial, We’ll learn how to read a file line by line in java and p… Read More
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