Encouraging Good Behavior with JUnit 5 Test Interfaces

Billy Korando Effective Automated Testing With Spring Series, Java, Spring, Technology Snapshot, Testing 2 Comments

JUnit 5, released in September of 2017, is the first major release for the popular JUnit testing framework in a little over a decade. I recently presented on JUnit 5 at Lava One Conf in Hawaii in January. If you have heard about JUnit 5, but are not yet familiar with it, you can check out my presentation here, as well as the JUnit 5 User Guides.

While researching for my presentation, one new feature in JUnit 5 really caught my eye was the ability to declare tests on default methods in interfaces. This feature caught my eye because two issues I frequently face are encouraging developers to write automated tests and promoting consistent patterns across the enterprise. In this article we are going to look at how test interfaces can help accomplish both of these goals.

Four Common Mistakes That Make Automated Testing More Difficult

Billy Korando Effective Automated Testing With Spring Series, Java, Spring, Technology Snapshot, Testing 2 Comments

This article is part of my blog series on automated testing promoting my new Pluralsight course Effective Automated Testing with Spring. Automated testing is an essential step in the development process (as covered in the first blog post in this series). Unfortunately, writing automated tests is often skipped because it’s difficult or there is a high maintenance cost associated with the tests written. …

Encrypting Working Files Locally in Spring Batch

Rik Scarborough Java, Spring, Spring Batch, Technology Snapshot Leave a Comment

It seems that quite often we read stories in the news about computer systems being cracked and data being compromised. It’s a growing concern that should be a consideration for everyone in Information Technology. There is probably not just one solution that will keep all data safe, but hopefully small efforts in many areas will provide us with the best possible solution.

In this post, I show a solution for encrypting sensitive files for local use with Java’s Encryption library & tying directly into Spring Batch readers and writers.

The Scenario
Recently we began writing a Spring Batch application that would handle sensitive data. The application servers were set up with some very good, basic security, but we felt the data could use some extra protection.

The data would be delivered to the company on a well-protected and secure FTP server. Mark Fricke did an excellent post recently on Spring Integration and Spring Batch in which he discusses downloading an encrypted file from a FTP server and decrypting it. Unfortunately, this was not exactly the problem we had. We needed to download a unencrypted file, but never write it to the Application Server unencrypted. But, we needed to be able to read that file and process it in Spring Batch.

Using Java’s built-in cryptography, we are able to extend Spring Batch to encrypt the file on the disk and then read that file in a Spring Batch Reader. In addition, we can write the results out as an encrypted file then transfer that file back to the secure FTP server as clean text.

Wow, that sounds like a lot and will be a really complex solution. Actually the code turned out to not be all that complex. This solution relies partly on the Delegate Pattern I wrote about before, so I will be using the same code I developed for that and just showing the changes here. Please refer back to the original post…

Using Docker + AWS to build, deploy and scale your application

Brandon Klimek AWS, DevOps, Docker, Spring, Spring Boot, Tutorial 7 Comments

I recently worked to develop a software platform that relied on Spring Boot and Docker to prop up an API. Being the only developer on the project, I needed to find a way to quickly and efficiently deploy new releases. However, I found many solutions overwhelming to set up.

That was until I discovered AWS has tools that allow any developer to quickly build and deploy their application.

In this 30 minute tutorial, you will discover how to utilize the following technologies:
– AWS CodeCommit – source control (git)
– AWS Code Build – source code compiler, rest runner
– AWS Codepipeline – builds, tests, and deploys code every time the repo changes
-AWS Elastic Beanstalk – service to manage EC2 instances handling deployments, provisioning, load balancing, and health monitoring
-Docker + Spring Boot – Our containerized Spring Boot application for the demo

Once finished, you will have a Docker application running that automatically builds your software on commit, and deploys it to the Elastic beanstalk sitting behind a load balancer for scalability. This continuous integration pipeline will allow you to worry less about your deployments and get back to focusing on feature development within your application.

Modernization Lessons: FTP & the Mainframe

Clayton Neff Consulting, Java, Problem Solving, Programming, Spring Batch, Technology Snapshot Leave a Comment

One of my most recent projects involved helping a client move many decades of code from a mainframe environment to a distributed Java web environment. The client had engaged another company to actually transform the mainframe code to Java, and our team was tasked with making it all actually work.

One of the major areas we had to deal with was the transition of all of the batch processes. Of course, Spring Batch came to our rescue for most of the work, and was an easy choice as we were already using Spring Boot to wrapper the converted applications.

The most challenging part of the entire project was that the client did not want to move everything at once in a Big Bang, but rather a few programs as a time. This meant that some programs would be running in the Java environment while others remained on the mainframe.

In this blog, I discuss three data challenges we encountered in the transition of an enterprise mainframe to Java web application with Spring Batch, how we overcame them, and tips to keep in mind going forward when in similar migration situations.