Trifork Blog

Category ‘Knowledge’

GOTO Nights Amsterdam, Join & Learn!

March 8th, 2016 by

As an introduction to the GOTO Conference in June, we organize a monthly meetup to introduce you to the topics of the conference. These meetups are called GOTO Nights and are totally free to attend and food and drinks are included.

At the start of the GOTO season we gather together to decide which topics are interesting for developers to learn more about. For these topics we try to find the best speakers for the conference and for the GOTO Nights.

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Elastic{ON} 2016

February 20th, 2016 by

Elastic{ON} 2016 - ViewLast week a colleague and I attended Elastic{ON} in San Francisco. The venue at Pier 48 gave a nice view on (among others) the Oakland Bay Bridge. Almost 2000 Elastic fanatics converged to listen to and talk about everything in the Elastic Stack.

I have been to a lot of sessions. I think the two most important things that I will take home are “5.0” and “graphs”.


The next version of the Elastic Stack will be 5.0. This means that all main Elastic products (Elasticsearch, Logstash, Kibana and Beats) are having the same version number in all following release bonanzas. This will be easier for all customers and clients.

I mentioned the Elastic Stack. This is a little rebranding of the ELK Stack plus Beats. More rebranding is the renaming of the Elastic as a Service solution Found to Elastic Cloud. I think those are simple but good changes.

Also Elastic created the concept of packs to combine extensions. Most notably the X-Pack will all the monitoring, alerting and security (and more) goodies wrapped together.

More about 5.0 on the Elastic blog.


Elastic{ON} 2016 - GraphThe other main take-away are the graph capabilities (Graph API) that will be added to Elasticsearch (through the X-Pack). It is still in an early phase but it looks awesome! It looks very easy to use and it is very fast. The UI is written as a Kibana plugin.

Actually there will be some more Kibana plugins. Managing users and roles via the Security API, for example.


Off course there were a lot of talks. Common subjects were security and recommendation. Graphs could play an important role there!

Some talks were cool user stories of companies that implemented (parts of) the Elastic Stack. Other talks dove deep into the different Elastic products. Some of those turned out to be a little out of my league. For example the math behind the new default BM25 scoring algorithm.

The talks will be put online in the next couple of weeks. So be sure to check them out! Maybe I will see you next year!

Recognizing commercials using the Alphonso API

September 21st, 2015 by

Liberty Global organized the Hack & Play Appathon in Ziggo dome on September 15th and 16th. More than 20 teams of hackers, designers and programmers were invited to create an app or a game for the Liberty Global product Horizon set-top box. Team Trifork joined with Dennis de Goede (Design & Frontend), Tony Abidi (Devops) and myself (Front & Backend).

Alphonso added another challenge to the appathon: Create the best integration with the Alphonso platform. Integration challenge? Sounds like a Trifork challenge to me.



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Setting up PWM as a password recovery tool for OpenLDAP

July 28th, 2015 by

A running LDAP implementation without a password recovery service for users can be a real hassle for system administrators, in our case every time when a user forgets his/her password the only way to reset/change it was to go to the system administrator let him fix it.

As a solution for this problem we stumbled upon PWM as a password recovery service and in this blogpost will describe the steps you have to take to implement this yourself.

The reasons why we chose PWM as our service of choice are the following:

  • Open-source and still being actively developed.
  • It works with multiple LDAP implementations, including OpenLDAP.
  • Pretty intuitive design for the end-user.
  • A vast amount of configuration options, of which configuring our own password policy is one option.
  • Able to recover password by sending and Email/SMS token or PIN.
  • Captcha Integration with Google re-Captcha.
  • Event logs and statistics that are available to administrators.

The rest of this post will focus on walking through the installation and initial configuration of PWM with an OpenLDAP system. Most of the things we describe can also be found in the PWM administration guide or from other sources. However, some things (eg. configuration of certain modules in PWM) we didn’t immediately understand and we will describe some tips/solutions here.

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WWDC 2015: Auto Layout improvements

June 22nd, 2015 by

Last weekend I arrived home safe and sound, already missing San Francisco. I had a wonderful time there and I have lots to talk about, but there was one topic in particular I think was not highlighted enough. That’s why I want to discuss it here. It was discussed in the following talks during WWDC:

Mysteries of Auto Layout – part 1
Mysteries of Auto Layout – part 2

I am a big fan of auto layout since it was introduced in iOS 6 and especially by using it directly in code, not by using Storyboard. But when using it in code it can get really verbose. I wrote some classes around that to make the resulting code much more compact. I wasn’t happy with my solution. So I was planning to go to a Lab during WWDC, to ask an actual Apple auto-layout engineer for his opinion about this matter. But it turned out I didn’t have to! Apple solved most of the problems I was having with Auto Layout with new API’s in iOS 9! In this blog I want to highlight those new API’s which make it easier to work with Auto Layout both in code and in Storyboard!
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GOTO Amsterdam: last minute updates

June 17th, 2015 by

One of the cool things of organizing a conference is dealing with the unexpected. The workshops are busy and tomorrow the conference kicks of with an awesome program. In the last days before the conference we had a few unfortunate cancellations for which we needed to find replacements.  We worked really hard but with great pride can announce our latest speakers for GOTO Amsterdam!

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Introducing GOTO London 2015

June 17th, 2015 by


You Should GOTO This Conference: Software Development That is Agile, Lean and Rugged

Competitive pressures have pushed speed of software development to become one of the highest priorities for businesses today. Improved tools and techniques have moved the state-of-the-art in agile development from pushing monolithic updates every few weeks to a continuous delivery of “micro-services” several times a day. But this move to “run what you wrote” and developer-driven infrastructure means developers are not only delivering products faster today, but are also responsible for the efficiency and safety of those products once they move into production.

This is a major shift in software development, and it forms a narrative that will underlie programming at the upcoming GOTO London technology conference, which I am helping organize and will be held Sept. 14-18.

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WWDC Day 1 continued

June 11th, 2015 by

Hello again from San Francisco! I just came back from the conference after attending it for the third day in a row! I have seen many interesting talks so far ranging from Swift to WatchKit and UI design. There is so much to talk about, but in my previous blog entry I could only cover the keynote of the first day. Otherwise it would have been way longer! So let’s continue where I left off …
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GOTO Amsterdam 2015: about puzzles and love

June 10th, 2015 by

In one week GOTO Amsterdam 2015 is busy (workshops) or you might be wondering what session to attend. When I started this journey 8 months ago, I wanted to create the best conference I could think of. For me quality has always been the main focus point. When we came to the final stages of shaping the program for GOTO Amsterdam I became aware that if I would attend the conference, I would have a hard time in deciding which session to attend to. I asked multiple attendees of this years edition what they thought of the conference and I heard the same thing over and over again: it is really difficult to choose because there are so many great sessions! This post is about how the talks, the topics and the tracks are woven into the GOTO Amsterdam 2015 conference. (I hope it helps you)

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WWDC Day 1

June 10th, 2015 by


Greetings from my hotel room in San Francisco, from where I’m writing this blog post. Right now it’s Tuesday evening and it has been two exciting days at the WWDC which takes place this week from Monday the 8th until Friday the 12th of June as I had announced earlier. Although I have three more days to go, I already wanted to give you guys an update on how everything has been going so far.

I have so much to talk about so I am trying to be brief, but I can already tell this isn’t going to be a short blog post. So get a cup of coffee, get a comfortable chair, sit back and relax. Are you ready? Here goes …
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