A Java geek

SpringOne2GX 2015

This week, I had the privilege to talk at SpringOne2GX in Washington D.C. in not only one but 2 talks: Get the Most out of Testing with Spring 4.2 with super Spring Test committer Sam Brannen and Spring Boot for DevOps. Apart from preparing and rehearsing, I also used the occasion to attend some talks. Here follows a resume of the best.

Java

True singletons with Dagger 2

I’ve written some time ago about Dagger 2. However, I still don’t understand every nook and cranny. In particular, the @Singleton annotation can be quite misleading as user Zhuiden was kind enough to point out: If you create a new ApplicationComponent each time you inject, you will get a new instance in every place where you inject; and you will not actually have singletons where you expect singletons.

Technical

Running your domain on HTTPS for free

This blog runs on HTTP for a long time as there is no transaction taking place so no security is needed (I use SFTP for file transfer). However, since Google’s latest search algorithm change, I’ve noticed a sharp decrease in the number of monthly visits, from more than 20k to around 13k. While my goal has never been to have the highest number of visits, it’s still good feedback to me (as well as a nice warm feeling).

Java

Creative Rx usage in testing setup

I don’t know if events became part of software engineering since Graphical-User Interface interactions, but for sure they are a very convenient way of modeling them. With more and more interconnected systems, asynchronous event management has become an important issue to tackle. With Functional-Programming also on the raise, this gave birth to libraries such as RxJava. However, modeling a problem as the handling of a stream of events shouldn’t be restricted to system events handling.

Java

Compile-time dependency injection tradeoffs in Android

As a backend software developer, I’m used to Spring as my favorite Dependency Injection engine. Alternatives include Java EE’s CDI which achieves the same result - in a different way. However, both inject at runtime: that means that there’s a definite performance cost to pay at the start of the application, the time it takes for all dependencies to be fulfilled.

Development

More DevOps for Spring Boot

I think Spring Boot brings something new to the table, especially concerning DevOps - and I’ve already written a post about it. However, there’s more than metrics and healthchecks. In one of another of my previous post, I described how to provide versioning information for Maven-built applications. This article will describe how this later post is not necessary when using Spring Boot.

Java

Fully automated Android build pipeline

In the course of my current job, I had to automate jobs for building Android applications. This post aims at describing the pain points I encountered in order for you readers not to waste your time if you intend to do so. The environment is the following: Puppet to automate the infrastructureJenkins for the CI serverThe Android projectA Gradle build file to build itRobolectric as the main testing framework Puppet and Jenkins My starting point was quite sound, indeed.

Java

Improve your tests with Mockito's capture

Unit Testing mandates to test the unit in isolation. In order to achieve that, the general consensus is to design our classes in a decoupled way using DI. In this paradigm, whether using a framework or not, whether using compile-time or runtime compilation, object instantiation is the responsibility of dedicated factories. In particular, this means the new keyword should be used only in those factories. Sometimes, however, having a dedicated factory just doesn’t fit.

Event

Spring 2015 European conferences tour

I’ve just finished my Spring 2015 European conferences tour. I’ve talked about Integration Testing, Mutation Testing and Spring Boot for Devops at Spring IO (Spain), GeeCon, DevIT and JEEConf. This is a resume of the sessions I attended and liked. Sessions I was not part of, I lost time in are or I slept in are not mentioned.

A Java geek

Nicolas Fränkel's blog