Web Architecture, Java Ecosystem, Software Craftsmanship

Build And Development Infrastructure

How to Increase your JVM Development Productivity

Posted on Oct 22, 2017

How to Increase your JVM Development Productivity

During development, it’s important to have fast feedback loops after code changes. Waiting for a cold restart of the application is not satisfying at all and slows down the development process. In this post, I show how we can reduce the turnaround time by using certain JVM arguments and class reloading. Besides those framework-independent means, I’ll give some tips for Vaadin and Spring Boot applications.

Don't use In-Memory Databases (like H2) for Tests

Posted on Aug 21, 2017

Don't use In-Memory Databases (like H2) for Tests

At a first glance, in-memory databases (like H2) look like a good idea. You can test your code without having to worry about installing and managing a dedicated database server up front. Just start your tests and the H2 database will be up and running. However, this comfort comes with severe drawbacks. In this post, I explain my reservations and point out alternatives.

Debugging within a PHP Docker Container using IDEA/PhpStorm and Xdebug

Posted on Aug 15, 2017

Debugging within a PHP Docker Container using IDEA/PhpStorm and Xdebug

Running PHP and an Apache in a Docker container is very handy for local development. But how can we debug the PHP code running in the container? In this post, I show you how to configure Xdebug in a PHP container and configure IntelliJ IDEA Ultimate or PhpStorm for remote debugging.

A Test Mail Server for a PHP Docker Container

Posted on Jul 24, 2017

A Test Mail Server for a PHP Docker Container

For a small PHP project, I created a Docker container with an Apache and PHP in order to ease local development and setup. But that was not enough because my PHP application also sends mails and I wanted to test this feature locally as well. That’s why I needed a local SMTP server for testing and integrate it into my current Docker composition. In this brief post, I show you how I achieved this.

Improving your Continuous Integration Setup with Docker and GitLab-CI

Posted on Oct 11, 2016

Improving your Continuous Integration Setup with Docker and GitLab-CI

A typical Jenkins 1.0 setup for Continuous Integration (CI) comes with some drawbacks. The job configuration is stored somewhere else but not in the version control system. This makes it hard to set up a new job correctly or to track configuration changes. Another pain point are the various tools (JDK, Maven, node, gulp etc.) that have to be installed and maintained on all Jenkins nodes. This increases the maintenance effort and can slow down the development. Let’s consider some solutions for these issues.

Version Numbers for Continuous Delivery with Maven and Docker

Posted on Jul 11, 2016

Version Numbers for Continuous Delivery with Maven and Docker

Dealing with version numbers is an important challenge on the way to Continuous Delivery. The classical versioning approach (“8.2.0”) and release workflow is inappropriate, because it can’t be automated properly. This post shows how we can leverage the Git commit hash to get rid of manual workflows and automate the Continuous Delivery pipeline. At the end, every build will produce an artifact which is potentially shippable. We’ll implement this solution with Maven and Docker.

Databases as a Challenge for Continuous Delivery

Posted on Nov 28, 2015

Databases as a Challenge for Continuous Delivery

Applying Continuous Delivery means to automate the delivery pipeline and to release frequently.  However, databases are a big challenge, because with every deployment we may need to update and migrate our database before we can deploy our application. This post points out solutions for dealing with databases in a Continuous Delivery scenario.

Tutorial: Continuous Delivery with Docker and Jenkins

Posted on Nov 7, 2015

Tutorial: Continuous Delivery with Docker and Jenkins

Introducing Continuous Delivery means to automate the delivery process and to release our application frequently. This way, we improve the reliability of the release process, reduce the risk and get feedback faster. However, setting up a Continuous Delivery pipeline can be difficult in the beginning. In this step by step tutorial I will show you how to configure a simple Continuous Delivery pipeline using Git, Docker, Maven and Jenkins.

Discussing Docker. Pros and Cons.

Posted on Oct 25, 2015

Discussing Docker. Pros and Cons.

Docker allows us to easily create reproducible environments for our application. We automate the setup of the environment and eliminate manual error-prone tasks. This way we reduce the risks and the reliability of the deployment process. But there are also challenges and domains, where the usage of Docker can be difficult. This post discusses several advantages of Docker and points out some drawbacks.

Building a Dropwizard Microservice with Docker and Maven

Posted on Sep 20, 2015

Building a Dropwizard Microservice with Docker and Maven

Dropwizard produces a fat jar containing every dependency your microservice needs to run. This includes a web server. This way, no web server needs to be installed and configured on the target machine. However, there is some infrastructure left (like the JRE) which still has to be installed before the deployment. That’s where Docker enters the stage. With Docker we can produce an artifact containing really everything we need to run our microservice. In this post, we take a look at how we can integrate Docker into our Maven build, run our tests against the container and push the image to a repository.