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Just today I’ve got a request to review changes to introduce Jekyll as the documentation framework. I was earlier proposing it myself so I knew what the outcome of the review could be - APPROVED.
I also knew that the guy who proposed the change was fighting the installation of Ruby gems and Jekyll to have a complete working environment for the documentation system on his own laptop. He was on Linux while I’m on Mac OS. He finally got it sorted out, but the final solution was not satisfactory to me - he installed additional dependencies onto his local machine directly and suggested the very same steps in README so others could follow his steps. I simply couldn’t approve it. Sorry.
The alternative was to use Docker and the docker-jekyll image. It makes Jekyll running in a self-contained container with no system-wide interaction with the local machine. And it’s officially supported and maintained by the Jekyll project itself.
I didn’t know deploying Scala web applications might be so easy until the very recent Warsaw Scala Enthusiasts meetup when Rafal Krzewski introduced me to one of the two sbt plugins for Docker - sbt-native-packager (the other is sbt-docker that they say is even better).
The blog post shows how easy it is to use Docker as a means of deploying Scala web applications using Play Framework (that actually uses sbt-native-packager under the covers).
Spark Streaming is an extension of the core Spark API that enables scalable, high-throughput, fault-tolerant stream processing of live data streams. Data can be ingested from many sources like Kafka, Flume, Twitter, ZeroMQ, Kinesis, or TCP sockets, and can be processed using complex algorithms expressed with high-level functions like map, reduce, join and window.
Buckle up and ingest some data using Apache Kafka and Spark Streaming! You surely will love the infrastructure (if you haven’t already). Be sure to type fast to see the potential of the platform at your fingertips.
In order to learn Kafka better, I developed a custom producer using the latest Kafka’s Producer API in Scala. I built Kafka from the sources, and so I’m using the version 0.8.3-SNAPSHOT. It was pretty surprising experience, esp. when I ran across java.util.concurrent.Future that seems so limited to what scala.concurrent.Future offers. No map, flatMap or such? So far I consider the switch to using Java for the Client API a big mistake.
Here comes the complete Kafka producer I’ve developed in Scala that’s supposed to serve as a basis for my future development endeavours using the API in what’s going to be in 0.8.3 release.
Dr. Martens Fulmar Smooth Buckle Shoes - Men#039;s Size 14 BRAN has always been high on my list of things to explore, but since there are quite a few things high on my list, Kafka couldn’t actually make it to the very top. Until just recently, when I was asked to give the broker a try and see whether or not it meets a project’s needs. Two projects, to be honest. You should see my face when I heard it.
That’s the moment when these two needs converged - exploring Apache Kafka and Docker (among the other tools) for three separate projects! Amazing, isn’t it? I could finally explore how Docker might ease exploration of products and deployment. I knew Docker could ease my developer life, but it’s only now when I really saw it. I would now dockerize everything. When I was told about the images wurstmeister/kafka and wurstmeister/zookeeper I couldn’t have been happier. Running Apache Kafka and using Docker finally became a no-brainer and such a pleasant experience.
I then thought I’d share the love so it’s not only mine and others could benefit from it, too.
In programming languages, ad hoc polymorphism is a kind of polymorphism in which polymorphic functions can be applied to arguments of different types, because a polymorphic function can denote a number of distinct and potentially heterogeneous implementations depending on the type of argument(s) to which it is applied.
The blog post presents a way to implement the type classes concept in Scala.
p.s. I’m yet to find out how much of it is multimethods in Clojure (that was once of much help to introduce me to functional programming).
Arek Komarzewski (a Scala developer in HCore) mentioned the following this Friday and made my day (and the whole week, too):
I can now ditch Guice’s @Singleton as I’ve got a trait and the companion object combo (thanks to Scala).
This time the blog post is without a complete working example. Not yet. It’s to remind myself to prepare one (or be given one after the blog post is published – whatever comes first). I just think it needs to be said aloud to be heard and think about.
What a joy to learn all the goodies sbt brings to the table and be given a chance to apply it right away to commercial projects in Scala!
I’ve recently been assigned to a task to create a solution to share common settings across projects in a multi-project build in a Scala project managed by sbt. With the new feature of sbt - autoplugins - it was very easy to implement from the day one.
So, you’ve got a moment to learn Scala and have IntelliJ IDEA with Scala plugin installed. Your wish is to maximize the mental outcome given the time at hand with little to no effort to set up a productive working environment. You may even think you may have gotten one, but, unless you’re doing what I’m describing here, you’re actually far from truly having it. I’m asking you to go the extra mile!
In this blog post I’m introducing you to two modes in the recently-shipped IntelliJ IDEA 14.1 – Full Screen and Distraction Free modes – and the few keystrokes I use in the development environment to have a comfortable place to learn Scala. I’m sure you’ll have found few ideas to improve your way into your own personal Scala nirvana.
Let’s go minimalistic, full screen, distraction-free, mouse- and touchpad-less!