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Robin Bramley10/29/11
1 replies

Relevancy Driven Development with Solr

The relevancy of search engine results is very subjective so therefore testing the relevancy of queries is also subjective. One technique that exists in the information retrieval field is the use of judgement lists; an alternative approach discussed here is...

Mitch Pronschinske10/29/11
0 replies

Portable Lucene Index Format & Applications

Andrzej Bialecki from Lucid Imagination had a great talk at Apache Lucene Eurocon 2011.  Below is the summary and i've attached the slides which are in PDF format at the bottom of this article.

Swizec Teller10/29/11
2 replies

“Startup rollercoaster” isn’t even the half of it

A year ago, to the day, I was sitting in Om Malik‘s office in San Francisco. We were discussing a possible writeup about Preona/LazyReadr on GigaOM.

Artiom Gourevitch10/29/11
3 replies

Just in Time Compiler (JIT) in Hotspot

What is JIT Compiler? The Just In Time Compiler (JIT) concept and more generally adaptive optimization is well known concept in many languages besides Java (.Net, Lua, JRuby).

John Dobie10/29/11
0 replies

A Free EC2 Cloud Server With Ubuntu, Jenkins And Sonar.

IntroductionThis example shows you how to create a free Amazon EC2 cloud based continuous integration and testing environment on Ubuntu.  This is a low power server but it is useful for infrequent use. I personally tend to recommend Cloudbees,  but this is...

Grant Ingersoll10/29/11
0 replies

Video: Search + Big Data: It's (still) All About the User

Thanks in no small part to Lucene, quality keyword search is easily obtainable. Likewise, tools like Apache Hadoop and its ecosystem have made it easier to store and process large quantities of data.

Mark Needham10/28/11
1 replies

Gaming the system: Some project examples

Earlier this year Liz Keogh gave a talk at QCon London titled ‘Learning and Perverse Incentives: The Evil Hat‘ where she eventually encouraged people to try and game the systems that they take part in. Over the last month or so we’ve had two different...

Chad Lung10/28/11
1 replies

Reading an ATOM feed using Apache Abdera and Java

Today I’ll show you how to read an ATOM feed using Apache Abdera with Java. I’m going to be using Atom Hopper as the ATOMPub server and you can check out my previous articles on how to get it running.

Eugen Paraschiv10/28/11
1 replies

Bootstrapping a web application with Spring 3.1 and Java based Configuration, part 1

1. OverviewThis is the first of a series of posts about setting up a RESTfull web application using Spring 3.1 with Java based configuration. The post will focus on bootstrapping the web application, discussing how to make the jump from XML to Java without...

David Fishman10/28/11
0 replies

Hadoop lets you store everything; with Lucene/Solr and more

This month’s Wired Magazine features a story on the roots of Hadoop at Yahoo and the three companies vying to drive its commercial frontiers farther forward faster: Hortonworks (Apache Lucene Eurocon Barcelona Keynote Video now available, see below),...

Mitch Pronschinske10/28/11
0 replies

Solr and Hadoop 'HUG' it Out

This talk on using Hadoop and Solr together for a NoSQL-like result was given by Ken Krugler, a friend of DZone who wrote the amazingly popular article, Solr +...

James Sugrue10/28/11
5 replies

Meet The Author: Learning Vaadin

Vaadin is one of the most popular Java web frameworks around these days, so a book aimed at beginners is bound to be welcomed. DZone MVB, Nicolas Frankel, has just written  Learning Vaadin aimed at this audience. I spoke with Nicolas to find out more about...

Axel Rauschmayer10/28/11
4 replies

Mobile apps – dead within three years?

On 2011-09-08, Seth Sternberg, CEO of Meebo made a bold prediction: Prediction: Mobile apps are dead in 3 yrs - mobile web wins. Faster cloud connection and faster chips. PCs all over again. Implications?

Niklas Schlimm10/27/11
9 replies

Threading stories: volatile and synchronized

In my last blog about the volatile modifier I have introduced a little program that illustrates the behaviour of volatile in a Java 6 (26) Hotspot VM. Since that day I had some interesting discussions that I wanted to share in this blog. It adds another...

Wayne Adams10/27/11
0 replies

Haskell From an OO Developer's Perspective, Part 1

I'm learning Haskell by following O'Sullivan, Goerzen and Stewart's Real World Haskell. I've been writing object-oriented code for well over half my career as a developer, and there are things about functional programming that really stand out to me...