Functional Conference - Random Notes

The first 'Functional Conference' happened in Bangalore between Oct 9-11. I had been keenly looking forward to it. This is a quick post on the sessions I attended and the conference itself. As the lineup of speakers and topics shaped up in the buildup to the conference on their website, it heightened my expectations. As a younger engineer I have gone through the cycle of expecting too much from conferences and thus not being able to learn sufficiently from that which was on offer. Time has had a mellowing effect... I find it much better to keep an open mind and try to absorb all that is on offer. And then, a little later, retain only that which is useful/pertinent. With that mindset and approach I found 'Functional Conference' a very fulfilling technology experience - plenty of technical richness to absorb and sufficient ideas to retain for long.

Experiments with XML XPath libraries on JVM

These days I mostly program in Scala. Few weeks ago I ran into a problem to search for data within fairly large XMLs. XPath and XQuery are the standard technologies to query XML's. JVM programmers have a choice of multiple libraries to choose from when it comes to XPath. One constraint in my problem was that the program to crunch these XML was a long-running one. So, apart from trying to make the search fast I had to make sure that the CPU/memory requirements were sane. On submitting a XPath search if a library forked many hundred threads, broke the XML into many hundred stubs thus consuming every single ounce of CPU/RAM at disposal on my machine, then it was simply a no-go. Even if such a library turned out to be an order of magnitude faster than the rest.

Running Machine-Learning Assignments on my Laptop's Spark Cluster

The latest offering of Coursera's popular course on Machine Learning by Andrew Ng started in the first week of March. The course requires Matlab's Octave to be used to solve the assignments. Apart from trying to solve the problems in Octave, I decided to solve the assignments in the programming language of my choice - Scala. This is a quick post on the why's and the how's.

Code Retreat

Last Saturday I happened to go to my first code retreat. Hosted by Multunus and conducted by the master programmer Venkat Subramaniam, it was a very learnful experience. Here's a sneak-peek of the event from my eyes.

Play2 Application on Wildfly - Why and How

JavaEE (v5 and v6) has a commanding presence in both marketshare and (developer) mindshare in the enterprise software world. The specifications are well thought-out, battle-tested and highly relied upon. I started using JavaEE (v5) way back in 2007 with JBoss 4.x. The latest release, JavaEE-7, which was released close to a year ago brings with itself a lot of worthy changes to the specs and impl. To bring myself up to speed on it I went through few books and attended a conference (JUDCon, Bangalore). But I have also been coding and acquainting myself with Typesafe's Scala reactive stack. These two stacks are bound to compete with each more and more in the coming days. However I feel, they can be used in applications in complementary ways when carefully designed. The competition and challenge to JavaEE-7 stems from two tough requirements -

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