Updating Microservices with Netty 5, Kafka 3, and React: Whirlpool Revisited

John Boardman Articles, Development Technologies & Tools, Java, JavaScript, Microservices, React Leave a Comment

Back in 2015 and 2016, I wrote two blogs that went step by step to develop a microservice/Netty architecture with fully working code called Whirlpool.

A lot has changed in the years since, so recently I decided to come back to the project, update it with the latest versions of Kafka and Netty, and add a React UI to it (rather than the vanilla JavaScript version it used before). In addition, I also added Windows Subsystem for Linux (WSL) scripts in addition to the Mac and Linux scripts that were there before and made all of the scripts more robust.

This blog will be about the work that went into all of those updates, plus a look at the new React UI. This provides an excellent view into what it takes to update an outdated microservices application implemented with Kafka (version .9 –>3.0) and Netty (4.1.3->5.0.0-alpha2), bringing all versions up to date and adding a React UI. By the end you’ll be familiar with the latest versions of these frameworks, know some “gotchas” to avoid, as well as understand how to integrate WebSockets into React.

Spring Boot With GraphQL: What The Cool Kids Are Doing

Matt McCandless API Development, Articles, Development Technologies & Tools, GraphQL, Spring Boot 2 Comments

Attention: The following article was published over 4 years ago, and the information provided may be aged or outdated. Please keep that in mind as you read the post.This article is going to introduce you to Spring Boot with GraphQL. We’ll walk through a simple beer app to show you what it can do. So you have built this really …

Spring Batch for XML

Spring Batch: Using JAXB And StaxEventItemWriter To Generate XML

Jonny Hackett Articles, Java, Spring Batch, Tutorial 2 Comments

While working with a client recently, my team was given the task to retrieve the held securities and account data from the system and export it to XML with the goal of importing it into another external system. The solution involved building a Spring Batch job that would read a set held security data, export that to XML data, and deliver the file to the external vendor securely.

In this blog, I’ll be giving a tutorial on how to execute this solution. These requirements form the basis for the example we’ll use.

Large Datasets with Spring Batch

Utilizing Spring Batch for Large Dataset Summarization

Clayton Neff Articles, Databases, Java, Spring, Spring Batch Leave a Comment

Attention: The following article was published over 5 years ago, and the information provided may be aged or outdated. Please keep that in mind as you read the post.I was recently tasked with summarizing the data of a several-million-row table, and the task proved to be a bit grueling at first. Eventually, I found a way to summarize the large …

What's New in JDK 14

What’s New in JDK 14 and Beyond

Eric Solomon Articles, Development Technologies & Tools, Java Leave a Comment

Why should one care about new JDK releases? As most Java developers are acutely aware, most of the industry is still dominated by JDK 8, so the likelihood of being able to use these new features in the near feature is probably low. However, as the industry gradually shifts from JDK 8 to the latest LTS release and becomes more accustomed to the new, 6-month release cadence, we should start seeing faster adoption rates of new releases. 

As a result, the need to continually sharpen your sword and stay up to date will increase. Also, if you are wanting to help kickstart the shift beyond JDK 8 in your projects, knowing what value later versions bring and being able to incorporate them into your proposal can be extremely helpful in making your goal of using a newer version a reality. Besides those two reasons, it is also just plain exciting to see what the latest and greatest is and where the language is heading.

So without further ado, let’s take a look at three of the more significant enhancements that come with JDK 14: Records, NullPointExceptions, and instanceof. If you like, you can check out the full list here. We’ll also briefly discuss JDK 15 and its promised JEPs.