Code-Held

Blog about Spring, Java, JVM, Clean Code, Continuous Integration, Docker, Unity and many more topics from my daily work
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In my current project we use Bitbucket Server as our Git backend and Jenkins with a pipeline multibranch project to build our project. For better integration of both technologies we decided to use the Bitbucket Branch Source Plugin. This enables us to trigger automated builds and maintain dynamic jobs on our Jenkins. But installing the necessary webhooks turned out to not be a trivial task.

This blog is not very old yet. I just started it a month ago and of course I wanted to know if somebody is even reading it. So after a few days I included Google Analytics to get an impression of the visitors of my page and if I even have an audience here. But barely any visit got tracked and since I didn’t even filter out my own ip I had the impression that I’m basically the only user of my page. But that impression was wrong, which I noticed when I switched to server side tracking.

After answering a question on stackoverflow about how to configure Spring Security with your own authentication mechanism I’d like to go into more details in this post. I’ll implement a simple use case where the actual authentication is done by reading the username and password from the header of a request.

I use the declarative Jenkins pipeline in my current project, but after 2 years of development we hit a barrier I wasn’t aware of. Jenkins puts the whole declarative pipeline into a single method and at a certain size the JVM fails with java.lang.RuntimeException: Method code too large!. Digging deeper it turns out that no method is allowed to exceed 64k. So I needed to find a solution for this problem.

After reading through Designing Bulletproof Code by Otavio Santana I stumbled upon its example of using a builder pattern. While this was not the focus of the article itself I also realized that I saw the issue in the past a lot and I ran in it as well. The widely spread understanding of the builder pattern (as described in Effective Java by Joshua Bloch) does not differentiate between optional and mandatory parameters and that makes their usage not easier but harder.

Today I have an awesome Message. Since I also post about technologies I use on this page I decided to put the whole page open source on gitlab. Feel free to discover how I developed this blog and which technologies I use.

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About Me

Picture of Marcus Held

Marcus Held

I work as a senior full-stack developer for Innogames GmbH on an unannounced game. My main responsibility is the development of a highly scalable backend with Java and Spring that is capable of handling millions of players worldwide. Furthermore, I take care of our Jenkins for continuous integration, our build pipeline with Gradle and all technical challenges that we face to get our game out into the world.

At the age of 12, I had my first experience with programming. At 15 I started working professionally for companies and by 18, prior to finishing school, I founded my first company: Web as Art. I studied computer science at Hochschule Bonn-Rhein-Sieg and live in Hamburg with my wife and two sons.

Boost Your Development With Proper API Design code.talks 2019

With 1600 attendees is code.talks the largest developer conference in Germany. Around 400 people listened to my talk where I discussed several aspect of robust software architecture design.

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Rise of Cultures
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What is it?

Rise of Cultures is a simulation game where you guide your civilization through the ages, meet other cultures, conquer continents and built up your cities.

What did I do?

I developed and maintained the backend, which we developed with Java, Spring and Hibernate. When I worked on the project we released it for the first time on the US market to test early retention KPIs.

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Sunrise Village
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What is it?

Sunrise Village was a character driven simulation game in which the player built up a village and explored the world with his character. The game featured a rich exploration of the world and an extensive production simulation.

What did I do?

I developed and designed the server from the early days of production with Java, C#, Spring, Hibernate, RabbitMQ and .NET Core. One of the main features of the backend was a .NET Core application that used the same business logic as our client. The backend was capable to simulate multiple players moving on the same map.

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Gates of Epica
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What is it?

Gates of Epica was an action RPG developed with the Unreal Engine 4 for iOS and Android. In the game the player fought for loot and glory in more then 600 hand-crafted missions and joined glorious multiplayer boss fights where many players fought a boss for days.

What did I do?

My responsibility was the development of the backend and game logic. We used Java with Spring Boot, postgreSQL and hibernate.

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Legends of Honor
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What is it?

Legends of Honor is a massive multiplayer online strategy browser game. In the game you take control over a medieval kingdom and move through the world with your army in real time.

What did I do?

When the project was started I joined it right away as the first backend developer. In this role I had the technical responsibility to design the server architecture and lead a team of 10 backend developers until the launch of the project.

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Shadow Kings
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What is it?

As a successor of Goodgame Empire it was planned to target a more casual audience with a similar gameplay. Shadow Kings got released on PC, iOS and Android.

What did I do?

I took over the project in the last months of its existence as the first backend developer. In this time it was my responsibility to lead a team of 6 backend developers and to fork off the server from its origins in Goodgame Empire.

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Goodgame Empire
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What is it?

Goodgame Empire is a massive multiplayer browsergame with more than 70 million registered players. As a player you build up your castle to rule over four different kingdoms.

What did I do?

I started working on Empire 2014 and was one of the main backend developers of one of the two feature teams we operated. In this project we operated a Java based server which handled thousands of concurrent users with a high amount of requests per minute.

Technologies

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