Willkommen

Herzlich willkommen auf meiner Webseite. Ich schreibe hier über Open Source Software, mit der ich bei meiner Arbeit oder Privat zu tun habe, selbst Programmiertes wie zum Beispiel Processing.org Spielereien und weiteres mehr. Entsprechend sind die Beiträge wild durcheinander. Bitte die "Themen" auf der linken Seite verwenden wenn dich nur ein Bereich interessiert.

Hi and welcome on my website. I write about Open Source Tools that I get in contact with, either at work or privatly and about stuff I program myself, for example some Processing.org Applications and more. The content is mixed in topics and languages. Please use the "Themen" menu on the left if you want to filter for specific content.

HTTP Caching with Varnish

Conference: PHP Romania 2018, Cluj, Romania
Title: HTTP Caching with Varnish
Links: slides

With the Varnish caching proxy you can make websites blazingly fast, while also handling a lot more load. The key is to understand how cache handling in HTTP works. We will also look at concepts like cache invalidation and cache tagging, as well as advanced concepts like Edge Side Includes (ESI). A lot of this talk is applicable regardless of the programming language of your backend. Examples will use the PHP library FOSHttpCache and sometimes the Symfony FOSHttpCacheBundle.

Beyond REST maturity levels: Insights from building a real life, high-load REST API

Conference: PHP Benelux 2018, Antwerp, Belgium
Title: Beyond REST maturity levels: Insights from building a real life, high-load REST API
Links: slides

Implementing a REST API is not only about designing correct resource URLs. I will talk about the software and system engineering part it takes to build a data API. I will show concrete examples from a project where we gather data from dozens of different services and systems and build a real-time capable data store. The main technology stack is Symfony, Elasticsearch and Varnish.

Workshop: Debugging PHP Applications

Conference: PHP Benelux 2018, Antwerp, Belgium
Title: Debugging PHP Applications
Links: joind.in
Format: 3 hours interactive workshop.

Sooner or later, an application will have errors. Some of them will be your fault, or that of a teammate. Others stem from third party libraries you are using. We want to be able to locate the cause of the error as quickly as possible. In this workshop, we will do exercises that will help you debug your applications more efficiently as well as writing them in a way that they get easier to debug.

We will look at the following topics:

- reading stack traces
- how to search through the code base
- writing good exception messages

Decoupling an application with message queues

Conference: Symfony Con 2017, Cluj, Romania
Title: Decoupling an application with message queues
Links: slides, joind.in

Quick response times are crucial. Time consuming tasks triggered in web requests should be executed asynchronously, if at all possible. In this talk I will give a short overview of what message queues are and then show a case study how we split up an application into smaller services and how we use message queues to coordinate the services.

Hands-on: HTTP caching with Varnish

Conference: Web Summer Camp 2017, Rovinj, Croatia
Title: Hands-on: HTTP caching with Varnish
Links: slides
This workshop was held together with Hrvoje Knežević

Going crazy with caching: Caching pages of logged in users

Conference: PHP Benelux Conference 2017, Antwerp, Belgium
Title: Going crazy with caching: Caching pages of logged in users
Links: joind.in, slides

Confoo: HTTP Caching with Varnish

Conference: Confoo Vancouver 2016, Canada
Title: HTTP Caching with Varnish
Links: Slides

With the Varnish caching proxy, you can greatly increase the speed of websites and handle a lot more load. The basics are quite simple once you understand how the cache handling in HTTP works, so we will look into that first. Then I will go into advanced topics like cache tagging and cache invalidation or using Edge Side Includes.

Confoo: Symfony Introduction

Conference: Confoo Vancouver 2016, Canada
Title: Symfony Introduction
Links: Slides

Symfony is a powerful and very flexible framework for building web applications. Symfony is also a collection of base components that you can use separately in any PHP application. This modular nature allows many frameworks to build on top of it, the most notable being Drupal 8 and Laravel. In this talk, I will give an overview of the fundamental Symfony components and show how to use the full stack framework.

Elastic Meetup Switzerland: Data Import Strategies

Meetup: Elastic Meetup #15, Bern, Switzerland
Title: Data Import Strategies
Links: Slides (my talk only)
Co-Presenter: My work collegue Martin Janser did the second part about querying

Liip AG provides a data API for one of the largest swiss retail companies. Elasticsearch is the main data store. Martin Janser and David Buchmann will share some learnings and patterns from the project.

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