A few weeks ago I wrote a blog on synchronizing multithreaded integration tests, which was republished on DZone Javalobby from where it received a comment from Robert Saulnier who quite rightly pointed out that you can also use join() to synchronize a worker thread and its unit tests. This got me thinking, just how many ways can you synchronise mul...

In my last post, I described a new feature in TokuMX 1.5partitioned collectionsthats aimed at making it easier and faster to work with time series data. Feedback from that post made me realize that some users may not immediately understand the differences between partitioning a collection and sharding a collection. In this post, I hope to clear tha...

Part 1 In the previous post we looked at techniques to help us create and articulate more effective queries. From auto-complete for lookup tasks to auto-suggest for exploratory search, these simple techniques can often make the difference between success and failure. But occasionally things do go wrong. Sometimes our information journey is more co...

I wrote about one way in which HR and IT can operate more closely, but there's another interaction between IT and HR that might not be so benign.DevOps is ultimately about breaking down silos in IT (indeed, my definition of DevOps is as a cultural structure where teams work together to meet the needs of the business rather than competing against ea...

Functions are one of the most important aspects of JavaScript. Without JavaScript functions, it would be very limited. Functions in JavaScript are used to perform a certain action or task. They can be written into the code, or they can be created using the Function constructor.

JSON (JavaScript Object Notation) is a commonly used semi-structured data type. With the self-describing schema structure, JSON can hold all data types, including multi-level nested data types, such as Array, Object, etc. JSON takes advantage of high flexibility and easy dynamic expansion compared with the structured data types that must strictly f...

A while ago I mentioned The three strands of Information Technology, and how this was split into an internal-facing component (IT for the business, IT for the employee) and external-facing (IT for the customer).In a pure technology company, there's quite a mismatch, with the customer-facing component being dominant and the internal-facing parts bei...

this is a list of 10 best practices that are more subtle than your average josh bloch effective java rule. while josh blochs list is very easy to learn and concerns everyday situations, this list here contains less common situations involving api / spi design that may have a big effect nontheless. i have encountered these things while ...

Efficient code doesn't just run faster; if it's using less compute-resource, it may also be cheaper to run. In particular, distributed cloud applications can benefit from fast, lightweight serialization. OpenSource Java Serializer Chronicle-Wire is an OpenSource Java serializer that can read and write to different message formats such as JSON, YAM...

A Java interview will most likely involve a scenario in which candidates will have to demonstrate their logical and programming skills, as well as their experience, as part of their evaluation of the candidate. Among the most common questions asked in interviews is "Can you write a palindrome program in Java?" This is also one of the most challengi...

I have lost count of the number of times I have been told that Java is not a suitable language in which to develop applications where performance is a major consideration. My first response is usually to ask for clarification on what is actually meant by performance as two of the most common measures - throughput and latency, sometimes conflict wit...

Whether they are built using the genuine Spring Framework or Spring Boot, such applications are widely developed and deployed these days. By trying to address simple or complex business challenges, products strongly rely on the used framework features in their attempt to offer elegant solutions. Elegant here means correct, clean, and easy to unders...

If you are new to serverless, creating a simple application for a serverless infrastructure is a good place to start. In this article, you will run through the steps to create your first serverless Java application that runs on any cloud.

All multi-threaded applications are prone to deadlock. The modern Kotlin platform is no exception to it. In this post lets discuss how to simulate a deadlock in Kotlin and how you can troubleshoot it. What Is Deadlock? First, lets try to understand what Deadlock means. Several technical definitions arent clear. Deadlock is one among them ;-). Deadl...

The Jakarta EE Ambassadors are thrilled to see Jakarta EE 10 being released! This is a milestone release that bears great significance to the Java ecosystem. Jakarta EE 8 and Jakarta EE 9.x were important releases in their own right in the process of transitioning Java EE to a truly open environment in the Eclipse Foundation. However, these release...

In my previous article, I wrote about how we can seamlessly generate template-based documents in our JavaScript application using EDocGen. As a Java developer, I have worked on creating backend applications for e-commerce and healthcare enterprises where the requirement for document generation is vast. And they have mostly done in java spring boot...

A year ago, I started with a couple of friends a new project based on Quarkus to create a visual editor for integrations called Kaoto. As responsible of the backend side, I obviously chose Java to do it. Coming from the Java 8 world with shy traces of Java 11, I decided to jump directly to Quarkus on Java 17 (unstable at the time) with Reactive and...

One of the reasons the market adopted Java so firmly is the power of the environment around it: the ecosystem is enormous. We have at least two or more frameworks to work on multiple proposals, besides the platforms where it assembles several solutions to work as one, such as Spring, Quarkus, Jakarta EE, and MicroProfile. Looking deep into both Ja...

Whereas Kubernetes is the target environment of application execution, you will not find here how to declare required services or deployment most optimally. Some basic Kubernetes configurations are just enough for demonstration purposes. Though, you can use the configurations as a starting point and improve them with the help of Kubernetes Document...

Although OpenJDK 19 is not an LTS, it is still a significant release, in my opinion. It includes several game-changing features that will alter the Java landscape. Many features intrigue my interest, but there are five in particular that I can't wait to try out. Let's break those down and talk about them separately.

Let's continue building our Java-based, command-line text editor that we started here. This is Part 2 of the "How To Build a Command-Line Text Editor With Java" series. We will cover the following:

java.lang.String#intern() is an interesting function in Java. When used in the right place, it has the potential to reduce the overall memory consumption of your application by eliminating duplicate strings in your application. To learn how the intern() function works, you may refer to this blog. In this post, lets discuss the performance impact of...

JVM memory has the following regions: JVM memory regions

Today all applications are connected to the Internet in one way or another. When developing simple applications, as a rule, there are no problems. Another thing is when the applications are complex, with many requests to the network. In this case, various tools and libraries can help you to work with the network and search for problems. We will stu...

IntroductionThe Spring Boot Java application was initially using the H2 embedded database, first the in-memory version (losing all data each run), then the file based version. The database structure is created using Liquibase.Then the requirement was to have the Spring Boot Java application still not dockerized (just started with mvn spring-boot:ru...

Have you ever wanted to know how text editors work, or how shell scripts change terminal text colors, update lines without scrolling, or move the cursor around? Surprise, surprise: even as Java devs, we can do this! In this series, I'll walk you through building a terminal-based text editor with Java.

The JavaScript language has a long history. There are a lot of developers out there who are still learning the basics. But, if you're trying to learn the language and make your first steps into it, you need to know what mistakes new developers make. You have already researched JavaScript development tutorials, and you know that it's one of the most...

intern() is an interesting function in java.lang.String object. intern() function eliminates duplicate string objects from the application and has the potential to reduce the overall memory consumption of your application. To understand how the string intern() function works you may refer to this interesting blog. Intern strings are stored in a str...

Our youngest child turned 18 today. He's embarked on his senior year of high school and has a good group of friends he likes to hang out with. They celebrated his birthday last night at the Kid Cudi concert followed by an after-party with additional friends at the ranch. Trish had fun decorating our downstairs with his friends and surprising him wh...

A while ago, I wrote about deploying Tribblix on Digital Ocean.The good news is that the same process works flawlessly with the recently released m28 Tribblix release.If you recall from the original article, adding an additional storage volume didn't work. But, we now have a vioscsi driver, so has the situation improved?Yes!All I did was select an ...

Not so long ago, Java lovers were engulfed by a mammoth addition yes, we all know, right? the Lambda Expressions in Java 1.8! Eclipsed by lambda, minor in its avatar for the oblivious, was another message should not be used as an identifier, since it is a reserved keyword from source level 1.8 on caught by the eyes of the assiduous and the peda...

Date/times logic in code is where the messiness of the real world upsets the relatively straightforward rules of the digital realm. Blame the bewildering hodgepodge of edge cases on the movement of celestial bodies and pope Gregory XIII (of the Gregorian calendar) but deal with it you must. Im sure you all know that the 31st of December can be in w...

Last year we saw the launch of a new Web programming language Dart - Structured Web Programming from Google. A very interesting approach to support web application development. Not so long after Go, Groovy, Ruby, Scala, << Name your DSL here >>; we see Dart. Is it a good thing to have at least one programming language to solve one probl...

I wrote about cyphers MERGE function a couple of weeks ago, and over the last few days, Ive been exploring how it works with schema indexes and unique constraints. An Exciting Time to Be a Developer There is so much that could be said about the merging of Neo4j and Cypher right now, but it is certainly reasonable to point out that this merger will ...