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The “Goal” of Performance Tuning

How do we make our programs faster? How do we make anything faster? My first co-op job was working in packaging. They had a small Industrial Engineering library and let me read from it at work. The first book I read changed my life and my way of thinking about problem solving: The Goal by Eliyahu M. Goldratt. Just about ...

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How I Chose my Replacement for Parse.com

When I first read the announcement that Parse.com would shut down on January 28th 2017, I went from disbelief (it’s probably an early April fool’s joke) to rage (how could they do that?!) to sadness (oh no! it was a great service) and finally to utter confusion (where do I go from here and what do I do with my ...

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Benchmarking the message queue based Activiti Async Executor

A bit of history One thing that never ceases to amaze me is how Activiti is being used in some very large organisations at some very impressive scales. In the past, this has led to various optimizations and refactorings, amongst which was the async executor – replacement for the old job executor. For the uninitiated: these executors handle timers and async continuations in ...

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JAXB and Log4j XML Configuration Files

Both Log4j 1.x and Log4j 2.x support use of XML files to specify logging configuration. This post looks into some of the nuances and subtleties associated with using JAXB to work with these XML configuration files via Java classes. The examples in this post are based on Apache Log4j 1.2.17, Apache Log4j 2.6.2, and Java 1.8.0_73 with JAXB xjc 2.2.8-b130911.1802. ...

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Token Authentication for Java Applications

java-interview-questions-answers

Building Identity Management, including authentication and authorization? Try Stormpath! Our REST API and robust Java SDK support can eliminate your security risk and can be implemented in minutes. Sign up, and never build auth again! Update 5/12/2016: Building a Java application? JJWT is a Java library providing end-to-end JWT creation and verification, developed by our very own Les Hazlewood. Forever ...

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Git Tutorial – The Ultimate Guide (PDF Download)

Git is, without any doubt, the most popular version control system. Ironically, there are other version control systems easier to learn and to use, but, despite that, Git is the favorite option for developers, which is quite clarifying about the powerfulness of Git. This guide will cover all the topics needed to know in order to use Git properly, from ...

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Developing Modern Applications with Scala: Reactive Applications

This article is part of our Academy Course titled Developing Modern Applications with Scala. In this course, we provide a framework and toolset so that you can develop modern Scala applications. We cover a wide range of topics, from SBT build and reactive applications, to testing and database acceess. With our straightforward tutorials, you will be able to get your ...

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One-shot Delete with Hibernate (JPA)

In older versions of Hibernate, I can see the one-shot delete indicated in the manual. But newer versions no longer have this section. I’m not sure why. So, in this post, I take a look if it still works. The one-shot delete section says: Deleting collection elements one by one can sometimes be extremely inefficient. Hibernate knows not to do ...

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iOS 10: New Operating System, New You!

iOS 10. It’s almost here. Are you ready for it? We’re guessing you’re not quite ready, but you know you need to be. You have to stay up-to-date on operating systems to keep your best clients and get new ones, but it can be hard to keep track of the changes. Well, it was hard. This might make it a ...

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