Blog: Blog.Project13.pl

Testing Leader Election (in Raft) using Akka, without Thread.sleep() ;-)

As I’m currently living in London and miss the Kraków SCKRK Reading Club meetings a lot (although I attend them remotely anyway!), me and some friends decided to start a similar initiative in Lo...

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Async Akka-Persistence-HBase Journal

Since I had a bit of time during the weekend, I decided to do something useful for Akka this time. I’ve recently been working mostly with HBase and Scalding, so picking up the new Akka Persisten...

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Disrupt 2 Grow — “Life is Study!”

Since the videos from this year’s Devoxx are online already, I figured I’d post my quicky session that was titled “Disrupt 2 Grow”. The talk was very unusual for me to do, as I...

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Scala reflection basics – accessing an object’s private field explained

Today’s blog post will be on the slightly weird side, because as Scala developers we don’t usually need to reach into reflection to solve problems at hand. It’s easy to fight most pr...

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Java8 The Good Parts @ JavaOne 2013

Just yesterday I gave a presentation together with Andrzej Grzesik, with whom we (and more friends!) organize GeeCON and the PolishJUG among other things. This is our first time at JavaOne, and right ...

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Proof of Concept – LambdaSpec, how testing will look with Java8

I recently had an hour or two to spare, so I decided to play around with Java 8 and it’s Lambdas. Coming from Scala and knowing the Spec of lambdas (I’ve been checking it out on each updat...

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[presentation][polish] TDD as the way to Scala enlightenment

Yesterday I was presenting at the local Student IT Festival together with a friend – Tomasz Borek. We’re both quite active community people as well as TDD fans thus when I was asked to pre...

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Scala 2.10 – Macros hands on with “method alias”

Where? Last week I was presenting at JFokus (cool conference, give it a try), a really nice JVM-focused conference. Obviously I love the conference I co-organise with fellow JUG members Geecon, too bu...

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Scala 2.10 – or, why you will love implicit value classes

Hip hip hurray. Scala 2.10 is Final (as can be read on scala-internals) so it’s high time for another blog post celebrating all the awesomeness it’s going to bring into our daily lifes! Th...

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Use Scala’s DynamicVariable to avoid closing over a value in Akka

If you’ve ever read Akka’s docs about Actors or saw this blogbost about how to avoid closing over the sender in Akka you already know why you shouldn’t close over the sender value wh...

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Use Scala’s DynamicVariable to avoid closing over a value in Akka

Note: As Steve points out in the comments this is actually NOT SAFE (the solution with DynamicVariable). (!) If you’ve ever read Akka’s docs about Actors or saw this blogbost about how to ...

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Scala powered streaming migrations in MongoDB on millions of records

In my project at work we have some production systems using MongoDB as their primary database. Quite a number of the collections we have there could be called “huge” and we sometimes have ...

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Scala + Android @ Mobilization 2012 – w ?odzi

Dopiero min??o kilka tygodni od ?odzkiej Mobilizacji a ju? mo?na ogl?dn?? nagrania z tej konferencji – wzorowa organizacja musz? powiedzie? :-) Sam content te? oceniam do?? wysoko – b?d? c...

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Easily cross-compile and release scala projects with sbt

Scala’s lack of compatibility Ok, lets get over with it – Scala is not binary compatible between minor versions (Where by minor I mean: MAJOR.MINOR.UPDATE). This raises the obvious problem...

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Around the world, around the world…

As in the upcoming weeks I’ll be again talking and meeting people around Europe, at some pretty cool places / conferences I thought I’d link back to them and share a few words on what I...

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Implementing the “Chrum” daily stand up @ SoftwareMill

At SoftwareMill – we’re fully distributed. That means that you end up working with people from all around Poland (or Australia, Africa, or the United States), and there’s no place yo...

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[Google I/O Extended Kraków] + [Google Guava]

Last week we’ve organized a Google I/O Extended in Kraków. As lead of the GDG (Google Developer Group) around here, and the only Kraków member that was in Poland on this day, it was a bit hasty ...

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[Scala] Presentation at AGH University of Science and Technology

Earlier this week I’ve had the honor of doing a presentation at my cities’ University of Science and Technology Kraków (known as AGH in Poland). Thanks to prof. Lig?za‘s interest in ...

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Scala 2.10: class OhMy extends Dynamic !

The first part of the post is a bit like “someone is wrong on the internet!” (yeah, a rant), so feel free to skip it and dive into a detailed post about Scala’s new Dynamic type in p...

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Scala 2.10.0: Hello $string interpolation!

Yup, now with Scala 2.10.0′s Milestone 3 we should be getting ready for the new SIPs introduced, one of the easiest to grasp (among TypeTokens and Macros ;-)) is the long requested SIP-11: Strin...

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