A Java geek

Bypassing Javascript checks

Nowadays, when a webapp offers a registration page, it usually duplicates the password field (or sometimes even the email field). By having you type the password twice, it wants to ensure that you didn’t make any mistake. And that you don’t have to reset the password the next time you try to login. It makes sense if you actually type the password. Me, I’m using a password manager. That means, I do a copy-paste the password I got from the password manager twice.

Java

Lambdas and Clean Code

As software developers, we behave like children. When we see shiny new things, we just have to play with them. That’s normal, accepted, and in general, even beneficial to our job… up to a point. When Java started to provide annotations with version 5, there was a huge move toward using them. Anywhere. Everywhere. Even when it was not a good idea to. But it was new, hence it had to be good. Of course, when something is abused, there’s a strong movement against it.

Java

Synthetic

There is a bunch of languages running on the JVM, from of course Java, to Clojure and JRuby. All of them have different syntaxes, but it’s awesome they all compile to the same bytecode. The JVM unites them all. Of course, it’s biased toward Java, but even in Java, there is some magic happening in the bytecode. The most well-known trick comes from the following code: public class Foo { static class Bar { private Bar() {} } public static void main(String...

Java

Flavors of Spring application context configuration

Every now and then, there’s an angry post or comment bitching about how the Spring framework is full of XML, how terrible and verbose it is, and how the author would never use it because of that. Of course, that is completely crap. First, when Spring was created, XML was pretty hot. J2EE deployment descriptors (yes, that was the name at the time) was XML-based. Anyway, it’s 2017 folks, and there are multiple ways to skin a cat.

Development

On exceptions

When Java came out some decades ago, it was pretty innovative at the time. In particular, its exception handling mechanism was a great improvement over previous C/C++. For example, in order to read from the file, there could be a lot of exceptions happening: the file can be absent, it can be read-only, etc.

Miscellaneous

You're not a compiler!

At conferences, it’s common to get gifts at booths. In general, you need to pass some some sort of challenge. Some of those challenges involve answering a code puzzle, like guessing the output of running some code snippet.

Miscellaneous

Rise and fall of JVM languages

Every now and then, there’s a post predicting the death of the Java language. The funny thing is that none of them writes about a date. But to be honest, they are all probably true. This is the fate of every language: to disappear into oblivion - or more precisely to be used less and less for new projects.

Development

Automating generation of Asciidoctor output

I’ve been asked to design new courses for the next semester at my local university. Historically, I create course slides with Power Point and lab instructions with Word. There are other possible alternatives, for slides and documents: Google Slides, A bunch of JavaScript frameworks (Reveal.js, Impress.js, etc.), Dedicated e-learning platforms (Moodle, etc.), etc.

Development

Strategies for optimizing Maven Docker images

Last week, I wrote on how to design a generic Docker image for Maven-based auto-executable webapps. The designed build file has 3 different stages: checkout from Github, build with Maven and execute with Java. The Maven build stage takes quite a long time, mostly due to: Executing testsDownloading dependencies Tests can be executed earlier in the build chain - then skipped for Docker, this post will focus on speeding up the download of the dependencies. Let’s check each option in turn.

Nicolas Fränkel's blog